TEXI2DVI = texi2dvi
M4 = @M4@
-PROGS = autoconf autoheader autoreconf @PROGS@
+PROGS = autoconf autoheader autoreconf ifnames @PROGS@
# Path of the perl interpreter.
PERL = @PERL@
DISTFILES = COPYING ChangeLog INSTALL Makefile.in NEWS README \
acconfig.h acfunctions acgeneral.m4 acheaders acidentifiers \
acmakevars acprograms acspecific.m4 autoconf.info* \
- autoconf.sh autoconf.texi autoheader.sh autoreconf.sh autoscan.pl \
+ autoconf.sh autoconf.texi install.texi \
+ autoheader.sh autoreconf.sh autoscan.pl shindent.sh ifnames.sh \
config.guess config.sub configure configure.in \
install.sh mkinstalldirs texinfo.tex \
+ testsuite/Makefile.in testsuite/config/*.exp \
+ testsuite/lib/*.exp \
+ testsuite/autoconf.0/*.exp \
standards.texi make-stds.texi standards.info*
editsh = sed -e 's,@''datadir''@,$(acdatadir),g' -e 's,@''M4''@,$(M4),g'
rm -f $@ $@.tmp
$(editsh) $(srcdir)/autoreconf.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+shindent: shindent.sh
+ rm -f $@ $@.tmp
+ $(editsh) $(srcdir)/shindent.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+
+ifnames: ifnames.sh
+ rm -f $@ $@.tmp
+ $(editsh) $(srcdir)/ifnames.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+
autoscan: autoscan.pl
rm -f $@ $@.tmp
$(editpl) $(srcdir)/autoscan.pl > $@.tmp && mv $@.tmp $@ && chmod +x $@
-info: autoconf.info @standards_info@
+info: autoconf.info @standards_info@ INSTALL
-autoconf.info: autoconf.texi
+autoconf.info: autoconf.texi install.texi
$(MAKEINFO) -I$(srcdir) $(srcdir)/autoconf.texi --output=$@
+INSTALL: install.texi
+ $(MAKEINFO) -I$(srcdir) $(srcdir)/install.texi --output=$@ \
+ --no-headers --no-validate
+
standards.info: standards.texi make-stds.texi
$(MAKEINFO) -I$(srcdir) $(srcdir)/standards.texi --output=$@
standards.dvi: standards.texi make-stds.texi
$(TEXI2DVI) $(srcdir)/standards.texi
-check:
-installcheck:
+check: all
+ rootme=`pwd`; cd testsuite && ${MAKE} $@ AUTOCONF=$$rootme/autoconf \
+ AUTOCONFFLAGS="-m $$rootme"
+installcheck: all install
+ cd testsuite && ${MAKE} AUTOCONF=${bindir}/autoconf $@
installdirs:
$(SHELL) ${srcdir}/mkinstalldirs $(bindir) $(infodir) $(acdatadir)
$(INSTALL_PROGRAM) autoconf $(bindir)/autoconf
$(INSTALL_PROGRAM) autoheader $(bindir)/autoheader
$(INSTALL_PROGRAM) autoreconf $(bindir)/autoreconf
+ $(INSTALL_PROGRAM) ifnames $(bindir)/ifnames
$(INSTALL_DATA) $(srcdir)/acgeneral.m4 $(acdatadir)/acgeneral.m4
$(INSTALL_DATA) $(srcdir)/acspecific.m4 $(acdatadir)/acspecific.m4
$(INSTALL_DATA) $(srcdir)/acconfig.h $(acdatadir)/acconfig.h
-if test -f autoscan; then \
$(INSTALL_PROGRAM) autoscan $(bindir)/autoscan; \
+ -if test -f shindent; then \
+ $(INSTALL_PROGRAM) shindent $(bindir)/shindent; \
$(INSTALL_DATA) $(srcdir)/acfunctions $(acdatadir)/acfunctions; \
$(INSTALL_DATA) $(srcdir)/acheaders $(acdatadir)/acheaders; \
$(INSTALL_DATA) $(srcdir)/acidentifiers $(acdatadir)/acidentifiers; \
uninstall:
rm -f $(bindir)/autoconf $(bindir)/autoheader $(bindir)/autoscan
- rm -f $(bindir)/autoreconf
+ rm -f $(bindir)/autoreconf $(bindir)/shindent $(bindir)/ifnames
rm -fr $(acdatadir)
cd $(infodir); rm -f autoconf.info*
if test -f standards.info || test -f $(srcdir)/standards.info; \
./config.status --recheck
clean:
- rm -f autoconf autoheader autoscan autoreconf *.tmp
+ rm -f autoconf autoheader autoscan autoreconf shindent ifnames *.tmp
rm -f *.aux *.cp *.cps *.dvi *.fn *.fns *.ky *.kys *.log
rm -f *.pg *.pgs *.toc *.tp *.tps *.vr *.vrs *.ma *.mas
rm -f Makefile config.status config.cache config.log
realclean: distclean
- rm -f TAGS *.info*
+ rm -f TAGS *.info* INSTALL
TAGS:
etags ${srcdir}/*.m4 ${srcdir}/*.sh ${srcdir}/[a-z]*.in ${srcdir}/*.texi
distname=`sed -e '/define(AC_ACVERSION,/!d' \
-e 's/[^0-9.]*\([0-9.]*\).*/autoconf-\1/' -e q acgeneral.m4`; \
rm -fr $$distname; \
- mkdir $$distname; \
+ mkdir $$distname $$distname/testsuite $$distname/testsuite/config; \
+ mkdir $$distname/testsuite/lib $$distname/testsuite/autoconf.0; \
for file in $(DISTFILES); do \
- ln $$file $$distname \
- || { echo copying $$file instead; cp -p $$file $$distname;}; \
+ ln $$file $$distname/$$file \
+ || { echo copying $$file instead; cp -p $$file $$distname/$$file;}; \
done; \
chmod -R a+rX $$distname; \
tar -chz -f $$distname.tar.gz $$distname; \
* Uses optional shell scripts $exec_prefix/lib/config.site and
$prefix/lib/config.site to perform site or system specific initializations.
* configure saves compiler output to ./config.log for debugging.
+* Has the beginnings of a DejaGnu test suite.
** New macros:
* AC_CACHE_VAL to share results of tests between configure runs.
* AC_CONFIG_AUX_DIR, AC_CANONICAL_SYSTEM, AC_LINK_FILES to
support deciding unguessable features based on the host and target types.
* AC_CONFIG_SUBDIRS to recursively configure a source tree.
+* AC_CHECK_TYPE, which checks whether sys/types.h defines a given type.
* AC_TEST_LINK, which obsoletes AC_COMPILE_CHECK.
* AC_TEST_RUN, which obsoletes AC_TEST_PROGRAM.
* AC_PREFIX_PROGRAM, which obsoletes AC_PREFIX.
* AC_ARG_ENABLE and AC_ARG_WITH, which obsolete AC_ENABLE and AC_WITH.
+* AC_SUBST_FILE, to insert one file into another.
** Changed macros:
* AC_OUTPUT adds the "automatically generated" comment after "#!" lines,
programs, and header files.
* autoreconf to recursively remake configure and configuration header
files in a source tree.
+* shindent to produce consistent indentation in shell scripts, such as
+ configure.
+* ifnames to list the symbols used in #if and #ifdef directives in a
+ source tree.
\f
Major changes in release 1.11:
ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
)m4exit(2)])dnl
dnl
-define(AC_ACVERSION, 1.93)dnl
+define(AC_ACVERSION, 1.94)dnl
dnl This is defined by the --version option of the autoconf script.
-ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
-)m4exit(0)])dnl
+ifdef([AC_PRINT_VERSION], [Autoconf version AC_ACVERSION
+m4exit(0)])dnl
dnl
dnl
dnl ### Controlling Autoconf operation
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
-configure_args="[$]*"
+configure_args="[$]@"
# Omit some internal, obsolete, or unimplemented options to make the
# list less imposing.
x_includes=
x_libraries=
+subdirs=
+
ac_prev=
for ac_option
do
" 1>&6
# Save the original args if we used an alternate arg parser.
-ac_configure_temp="${configure_args-[$]*}"
+ac_configure_temp="${configure_args-[$]@}"
# Strip out --no-create and --norecursion so they do not pile up.
+# Also quote any args containing spaces.
configure_args=
for ac_arg in $ac_configure_temp; do
case "$ac_arg" in
| --no-cr | --no-c) ;;
-norecursion | --norecursion | --norecursio | --norecursi \
| --norecurs | --norecur | --norecu | --norec | --nore | --nor) ;;
+changequote(,)dnl
+ *[" "]*) configure_args="$configure_args '$ac_arg'" ;;
+changequote([,])dnl
*) configure_args="$configure_args $ac_arg" ;;
esac
done
fi
fi
+ifdef([AC_LIST_SUBDIRS],[subdirs="AC_LIST_SUBDIRS"
+AC_SUBST(subdirs)])dnl
ifdef([AC_LIST_PREFIX_PROGRAM], [AC_PREFIX(AC_LIST_PREFIX_PROGRAM)])dnl
dnl Let the site file select an alternate cache file if it wants to.
AC_SITE_LOAD
# as determined by config.guess.
# 4. Target defaults to nonopt.
# 5. If nonopt is not specified, then target defaults to host.
-# 6. build defaults to empty.
+# 6. build defaults to empty (but implicitly to host).
# The aliases save the names the user supplied, while $host etc.
# will get canonicalized.
test -n "$host" && AC_VERBOSE(setting host to $host)
AC_SUBST(host)dnl
AC_SUBST(host_alias)dnl
+AC_SUBST(host_cpu)dnl
+AC_SUBST(host_vendor)dnl
+AC_SUBST(host_os)dnl
])dnl
dnl
define(AC_CANONICAL_TARGET,
test -n "$target" && AC_VERBOSE(setting target to $target)
AC_SUBST(target)dnl
AC_SUBST(target_alias)dnl
+AC_SUBST(target_cpu)dnl
+AC_SUBST(target_vendor)dnl
+AC_SUBST(target_os)dnl
])dnl
dnl
define(AC_CANONICAL_BUILD,
test -n "$build" && AC_VERBOSE(setting build to $build)
AC_SUBST(build)dnl
AC_SUBST(build_alias)dnl
+AC_SUBST(build_cpu)dnl
+AC_SUBST(build_vendor)dnl
+AC_SUBST(build_os)dnl
])dnl
dnl
dnl Link each of the existing files in $2 to the corresponding
CEOF
changequote(,)dnl
dnl Allow a site initialization script to override cache values.
-set | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
+# Ultrix sh set writes to stderr and can't be redirected directly.
+(set) 2>&1 | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([,])dnl
fi])dnl
dnl
define(AC_CACHE_VAL,
[dnl We used to use the below line, but it fails if the 1st arg is a
dnl shell variable, so we need the eval.
-dnl if test "${$1+set}" = set; then
+dnl if test "${$1+set}" = set; then
if eval "test \"`echo '${'$1'+set}'`\" = set"; then
dnl This verbose message is just for testing the caching code.
AC_VERBOSE(using cached value for $1)
divert(AC_DIVERSION_NORMAL)dnl
])])dnl
dnl
+dnl AC_SUBST_FILE(VARIABLE, FILE)
+define(AC_SUBST_FILE,
+[if test -f $2; then
+ AC_VERBOSE(using $2 for $1)
+ AC_INSERT_FILE($1, $2)
+elif test -f ${srcdir}/$2; then
+ AC_VERBOSE(using ${srcdir}/$2 for $1)
+ AC_INSERT_FILE($1, ${srcdir}/$2)
+fi
+])dnl
+define(AC_INSERT_FILE,
+[ifdef([AC_SUBST_$1], ,
+[define([AC_SUBST_$1], )dnl
+divert(AC_DIVERSION_SED)dnl
+/@$1@/r [$]$1
+s%@$1@%%g
+divert(AC_DIVERSION_VAR)dnl
+$1='$2'
+divert(AC_DIVERSION_NORMAL)dnl
+])])dnl
+dnl
dnl
dnl ### Printing messages
dnl
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
dnl
-dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
+dnl [, OTHER-LIBRARIES]]])
define(AC_HAVE_LIBRARY, [dnl
changequote(/,/)dnl
define(/AC_LIB_NAME/, dnl
AC_CHECKING([for -l[]AC_LIB_NAME])
AC_CACHE_VAL(AC_CV_NAME,
[ac_save_LIBS="${LIBS}"
-LIBS="${LIBS} -l[]AC_LIB_NAME[]"
-AC_TEST_LINK( , [main();],
-AC_CV_NAME=yes, AC_CV_NAME=no)dnl
+LIBS="${LIBS} -l[]AC_LIB_NAME[] $4"
+AC_TEST_LINK( , [main();], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
LIBS="${ac_save_LIBS}"
])dnl
if test "${AC_CV_NAME}" = yes; then
-ifelse($#, 1, [dnl
- AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
- LIBS="${LIBS} -l[]AC_LIB_NAME[]"
-undefine(AC_LIB_NAME)dnl
-undefine(AC_CV_NAME)dnl
-], [dnl
- :; $2
-else
- :; $3
+ ifelse([$2], ,
+[AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
+ LIBS="${LIBS} -l[]AC_LIB_NAME[]"
+], [$2])
+ifelse([$3], , , [else
+ $3
])dnl
fi
+undefine(AC_LIB_NAME)dnl
+undefine(AC_CV_NAME)dnl
])dnl
dnl
dnl
#include "confdefs.h"
[$1]
int main() { return 0; }
-int t() { [$2]; return 0; }
+int t() {
+[$2]
+; return 0; }
EOF
if eval $ac_compile; then
ifelse([$3], , :, [rm -rf conftest*
])dnl
dnl
dnl AC_SIZEOF_TYPE(TYPE)
-define(AC_SIZEOF_TYPE, [dnl
-changequote(<<,>>)dnl
+define(AC_SIZEOF_TYPE,
+[changequote(<<,>>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
undefine(AC_CV_NAME)dnl
])dnl
dnl
+dnl AC_CHECK_TYPE(TYPE, DEFAULT)
+define(AC_CHECK_TYPE,
+[AC_CHECKING(for $1 in sys/types.h)
+AC_CACHE_VAL(ac_cv_type_$1,
+[AC_HEADER_EGREP($1, sys/types.h, ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
+if test $ac_cv_type_$1 = no; then
+ AC_DEFINE($1, $2)
+fi
+])dnl
+dnl
dnl
dnl ### The big finish
dnl
dnl Create the header files listed in $1.
dnl This is a subroutine of AC_OUTPUT. It is called inside a quoted
dnl here document whose contents are going into config.status.
-define(AC_OUTPUT_HEADER,[dnl
-changequote(<<,>>)dnl
+define(AC_OUTPUT_HEADER,
+[changequote(<<,>>)dnl
# These sed commands are put into ac_sed_defs when defining a macro.
# They are broken into pieces to make the sed script easier to manage.
define(AC_OUTPUT_SUBDIRS,
[if test -z "${norecursion}"; then
- # Remove --cache-file arguments so they do not pile up.
+ # Remove --cache-file and --srcdir arguments so they do not pile up.
ac_sub_configure_args=
ac_prev=
for ac_arg in $configure_args; do
-cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
| --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
;;
+ -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+ ac_prev=srcdir ;;
+ -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+ ;;
+changequote(,)dnl
+ *[" "]*) ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
+changequote([,])dnl
*) ac_sub_configure_args="$ac_sub_configure_args $ac_arg" ;;
esac
done
# The recursion is here.
if test -n "${ac_sub_configure}"; then
- AC_VERBOSE([running ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file])
- if ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file
+ AC_VERBOSE([running ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file] --srcdir=${ac_sub_srcdir})
+ if ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file --srcdir=${ac_sub_srcdir}
then :
else
AC_ERROR(${ac_sub_configure} failed for ${ac_config_dir})
else
ac_cv_prog_gcc=no
fi])dnl
-if test "$ac_cv_prog_gcc" = yes; then GCC=yes; else GCC= ; fi
+if test $ac_cv_prog_gcc = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
else
ac_cv_prog_gxx=no
fi])dnl
-if test "$ac_cv_prog_gxx" = yes; then GXX=yes; else GXX= ; fi
+if test $ac_cv_prog_gxx = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
-if test "$ac_cv_prog_gcc" = yes; then
+if test $ac_cv_prog_gcc = yes; then
AC_CHECKING(whether -traditional is needed)
AC_CACHE_VAL(ac_cv_prog_gcc_traditional,
[ ac_pattern="Autoconf.*'x'"
AC_PROGRAM_EGREP($ac_pattern, $ac_prog,
ac_cv_prog_gcc_traditional=yes, ac_cv_prog_gcc_traditional=no)
- if test "$ac_cv_prog_gcc_traditional" = no; then
+ if test $ac_cv_prog_gcc_traditional = no; then
ac_prog='#include <termio.h>
Autoconf TCGETA'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_cv_prog_gcc_traditional=yes)
fi])dnl
- if test "$ac_cv_prog_gcc_traditional" = yes; then
+ if test $ac_cv_prog_gcc_traditional = yes; then
CC="$CC -traditional"
AC_VERBOSE(setting CC to $CC)
fi
else
AC_CHECKING(whether cc understands -c and -o together)
fi
+set dummy $CC; ac_cc=[$]2
+AC_CACHE_VAL(ac_cv_prog_cc_${ac_cc}_c_o,
+[ac_cv_prog_cc_${ac_cc}_c_o=no
echo 'foo(){}' > conftest.c
# Make sure it works both with $CC and with simple cc.
# We do the test twice because some compilers refuse to overwrite an
if cc -c conftest.c -o conftest2.o 1>&6 2>&6 &&
test -f conftest2.o && cc -c conftest.c -o conftest2.o 1>&6 2>&6
then
- :
- else
- AC_DEFINE(NO_MINUS_C_MINUS_O)
+ ac_cv_prog_cc_${ac_cc}_c_o=yes
fi
fi
fi
-else
- AC_DEFINE(NO_MINUS_C_MINUS_O)
fi
rm -f conftest*
])dnl
+if test $ac_cv_prog_cc_${ac_cc}_c_o = no; then
+ AC_DEFINE(NO_MINUS_C_MINUS_O)
+fi
+])dnl
dnl
dnl Define SET_MAKE to set ${MAKE} if make doesn't.
define(AC_SET_MAKE,
[AC_CHECKING(whether ${MAKE-make} sets \$MAKE)
-cat > conftestmake <<'EOF'
+set dummy ${MAKE-make}; ac_make=[$]2
+AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
+[cat > conftestmake <<'EOF'
all:
@echo 'ac_maketemp="${MAKE}"'
EOF
eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
changequote([,])dnl
if test -n "$ac_maketemp"; then
+ ac_cv_prog_make_${ac_make}_set=yes
+else
+ ac_cv_prog_make_${ac_make}_set=no
+fi
+rm -f conftestmake])dnl
+if test $ac_cv_prog_make_${ac_make}_set = yes; then
SET_MAKE=
else
SET_MAKE="MAKE=${MAKE-make}"
AC_VERBOSE(setting MAKE to ${MAKE-make} in Makefiles)
fi
-rm -f conftestmake
AC_SUBST([SET_MAKE])dnl
])dnl
dnl
[AC_PROVIDE([$0])dnl
AC_CHECKING(how to run the C preprocessor)
if test -z "$CPP"; then
- # This must be in double quotes, not single quotes, because CPP may get
- # substituted into the Makefile and "${CC-cc}" will simply confuse
- # make. It must be expanded now.
+AC_CACHE_VAL(ac_cv_prog_CPP,
+[ # This must be in double quotes, not single quotes, because CPP may get
+ # substituted into the Makefile and "${CC-cc}" will confuse make.
CPP="${CC-cc} -E"
-dnl On the NeXT, cc -E runs the code through the compiler's parser,
-dnl not just through cpp.
+ # On the NeXT, cc -E runs the code through the compiler's parser,
+ # not just through cpp.
AC_TEST_CPP([#include <stdio.h>
Syntax Error], ,
CPP="${CC-cc} -E -traditional-cpp"
AC_TEST_CPP([#include <stdio.h>
Syntax Error], ,CPP=/lib/cpp))
+ ac_cv_prog_CPP="$CPP"])dnl
fi
+CPP="$ac_cv_prog_CPP"
AC_VERBOSE(setting CPP to $CPP)
AC_SUBST(CPP)dnl
])dnl
define(AC_PROG_CXXCPP,
[AC_PROVIDE([$0])dnl
AC_CHECKING(how to run the C++ preprocessor)
-AC_LANG_SAVE[]dnl
-AC_LANG_CPLUSPLUS[]dnl
if test -z "$CXXCPP"; then
+AC_CACHE_VAL(ac_cv_prog_CXXCPP,
+[AC_LANG_SAVE[]dnl
+AC_LANG_CPLUSPLUS[]dnl
CXXCPP="${CXX-c++} -E"
AC_TEST_CPP([#include <stdlib.h>], , CXXCPP=/lib/cpp)
-fi
-AC_VERBOSE(setting CXXCPP to $CXXCPP)
+ ac_cv_prog_CXXCPP="$CXXCPP"
AC_LANG_RESTORE[]dnl
+fi])dnl
+CXXCPP="$ac_cv_prog_CXXCPP"
+AC_VERBOSE(setting CXXCPP to $CXXCPP)
AC_SUBST(CXXCPP)dnl
])dnl
dnl
AC_VERBOSE(setting LEXLIB to $LEXLIB)
AC_SUBST(LEXLIB)])dnl
dnl
-define(AC_YYTEXT_POINTER,[dnl
-AC_REQUIRE_CPP()dnl
+define(AC_YYTEXT_POINTER,
+[AC_REQUIRE_CPP()dnl
AC_REQUIRE([AC_PROG_LEX])dnl
AC_CHECKING(for yytext declaration)
-# POSIX says lex can declare yytext either as a pointer or an array; the
+AC_CACHE_VALUE(ac_cv_prog_lex_yytext_pointer,
+[# POSIX says lex can declare yytext either as a pointer or an array; the
# default is implementation-dependent. Figure out which it is, since
# not all implementations provide the %pointer and %array declarations.
#
# The minimal lex program is just a single line: %%. But some broken lexes
# (Solaris, I think it was) want two %% lines, so accommodate them.
+ac_cv_prog_lex_yytext_pointer=no
echo '%%
%%' | ${LEX}
if test -f lex.yy.c; then
elif test -f lexyy.c; then
LEX_OUTPUT_ROOT=lexyy
else
- # Do not know what to do here.
- AC_ERROR(cannot find output from $LEX, giving up on yytext declaration)
- LEX_OUTPUT_ROOT=
-fi
-if test -n "$LEX_OUTPUT_ROOT"; then
- echo 'extern char *yytext; main () { exit (0); }' >>$LEX_OUTPUT_ROOT.c
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS $LEXLIB"
- AC_TEST_LINK(`cat $LEX_OUTPUT_ROOT.c`, AC_DEFINE(YYTEXT_POINTER))
- LIBS="$ac_save_LIBS"
- rm -f "${LEX_OUTPUT_ROOT}.c"
+ AC_ERROR(cannot find output from $LEX, giving up)
+fi
+echo 'extern char *yytext; main () { exit (0); }' >>$LEX_OUTPUT_ROOT.c
+ac_save_LIBS="$LIBS"
+LIBS="$LIBS $LEXLIB"
+AC_TEST_LINK(`cat $LEX_OUTPUT_ROOT.c`, ac_cv_prog_lex_yytext_pointer=yes)
+LIBS="$ac_save_LIBS"
+rm -f "${LEX_OUTPUT_ROOT}.c"])dnl
+if test $ac_cv_prog_lex_yytext_pointer = yes; then
+ AC_DEFINE(YYTEXT_POINTER)
fi
AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
''|.|/etc|/sbin|/usr/sbin|/usr/etc|/usr/afsws/bin|/usr/ucb) ;;
*)
# OSF1 and SCO ODT 3.0 have their own names for install.
- for ac_prog in installbsd scoinst install; do
+ for ac_prog in ginstall installbsd scoinst install; do
if test -f $ac_dir/$ac_prog; then
if test $ac_prog = install &&
grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
])dnl
dnl
define(AC_LN_S,
-[AC_CHECKING(for ln -s)
-rm -f conftestdata
+[AC_CHECKING(whether ln -s works)
+AC_CACHE_VAL(ac_cv_prog_LN_S,
+[rm -f conftestdata
if ln -s X conftestdata 2>/dev/null
then
rm -f conftestdata
- LN_S="ln -s"
+ ac_cv_prog_LN_S="ln -s"
+else
+ ac_cv_prog_LN_S=ln
+fi])dnl
+LN_S="$ac_cv_prog_LN_S"
+if test "$ac_cv_prog_LN_S" = "ln -s"; then
AC_VERBOSE(ln -s is supported)
else
- LN_S=ln
AC_VERBOSE(ln -s is not supported)
fi
-AC_SUBST(LN_S)
+AC_SUBST(LN_S)dnl
])dnl
dnl
define(AC_RSH,
[AC_CHECKING(for remote shell)
+AC_CACHE_VAL(ac_cv_path_RSH,
+[ac_cv_path_RSH=true
for ac_file in \
/usr/ucb/rsh /usr/bin/remsh /usr/bin/rsh /usr/bsd/rsh /usr/bin/nsh
do
if test -f $ac_file; then
- AC_VERBOSE(found remote shell $ac_file)
- RTAPELIB=rtapelib.o
+ ac_cv_path_RSH=$ac_file
break
fi
-done
-if test -z "$RTAPELIB"; then
- AC_HEADER_CHECK(netdb.h, AC_DEFINE(HAVE_NETDB_H) RTAPELIB=rtapelib.o,
- AC_DEFINE(NO_REMOTE))
+done])dnl
+RSH="$ac_cv_path_RSH"
+if test $RSH != true; then
+ AC_VERBOSE(found remote shell $RSH)
+ RTAPELIB=rtapelib.o
+else
+ AC_VERBOSE(found no remote shell)
+ AC_HEADER_CHECK(netdb.h, RTAPELIB=rtapelib.o AC_DEFINE(HAVE_NETDB_H),
+ RTAPELIB= AC_DEFINE(NO_REMOTE))
fi
+AC_SUBST(RSH)dnl
AC_SUBST(RTAPELIB)dnl
])dnl
dnl
define(AC_STDC_HEADERS,
[AC_REQUIRE_CPP()dnl
AC_CHECKING(for ANSI C header files)
-AC_TEST_CPP([#include <stdlib.h>
+AC_CACHE_VAL(ac_cv_header_stdc,
+[AC_TEST_CPP([#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
-#include <float.h>], ac_stdc_hdrs=yes, ac_stdc_hdrs=no)
+#include <float.h>], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-AC_HEADER_EGREP(memchr, string.h, , ac_stdc_hdrs=no)
+AC_HEADER_EGREP(memchr, string.h, , ac_cv_header_stdc=no)
fi
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-AC_HEADER_EGREP(free, stdlib.h, , ac_stdc_hdrs=no)
+AC_HEADER_EGREP(free, stdlib.h, , ac_cv_header_stdc=no)
fi
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TEST_RUN([#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
exit (0); }
], , ac_stdc_headers=no)
-fi
-
-if test "$ac_stdc_hdrs" = yes; then
+fi])dnl
+if test $ac_cv_header_stdc = yes; then
AC_DEFINE(STDC_HEADERS)
fi])dnl
dnl
-define(AC_UNISTD_H, [AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(unistd.h)])AC_HEADER_CHECK(unistd.h,
- AC_DEFINE(HAVE_UNISTD_H))])dnl
+define(AC_UNISTD_H,
+[AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(unistd.h)])dnl
+AC_HEADER_CHECK(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])dnl
dnl
define(AC_USG,
[AC_OBSOLETE([$0],
[; instead use AC_HAVE_HEADERS(string.h) and HAVE_STRING_H])dnl
AC_CHECKING([for BSD string and memory functions])
-AC_TEST_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);], , AC_DEFINE(USG))])dnl
+AC_TEST_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);], ,
+ AC_DEFINE(USG))])dnl
dnl
dnl
dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
dnl
define(AC_MAJOR_HEADER,
[AC_CHECKING([for major, minor and makedev header])
-AC_TEST_LINK([#include <sys/types.h>],
-[return makedev(0, 0);], ac_have_makedev=yes, ac_have_makedev=no)
-if test "$ac_have_makedev" = no; then
-AC_HEADER_CHECK(sys/mkdev.h, AC_DEFINE(MAJOR_IN_MKDEV) ac_have_makedev=yes)
-fi
-if test "$ac_have_makedev" = no; then
-AC_HEADER_CHECK(sys/sysmacros.h, AC_DEFINE(MAJOR_IN_SYSMACROS))
-fi]
-)dnl
+AC_CACHE_VAL(ac_cv_header_major,
+[AC_TEST_LINK([#include <sys/types.h>],
+[return makedev(0, 0);], ac_cv_header_major=sys/types.h, ac_cv_header_major=no)
+if test $ac_cv_header_major = no; then
+AC_HEADER_CHECK(sys/mkdev.h, ac_cv_header_major=sys/mkdev.h)
+fi
+if test $ac_cv_header_major = no; then
+AC_HEADER_CHECK(sys/sysmacros.h, ac_cv_header_major=sys/sysmacros.h)
+fi])dnl
+case "$ac_cv_header_major" in
+sys/mkdev.h) AC_DEFINE(MAJOR_IN_MKDEV) ;;
+sys/sysmacros.h) AC_DEFINE(MAJOR_IN_SYSMACROS) ;;
+esac
+])dnl
dnl
define(AC_DIR_HEADER,
[AC_PROVIDE([$0])dnl
AC_CHECKING(for directory library header)
-ac_dir_header=
-AC_DIR_HEADER_CHECK(dirent.h, DIRENT)
-AC_DIR_HEADER_CHECK(sys/ndir.h, SYSNDIR)
-AC_DIR_HEADER_CHECK(sys/dir.h, SYSDIR)
-AC_DIR_HEADER_CHECK(ndir.h, NDIR)
+AC_CACHE_VAL(ac_cv_header_dir,
+[ac_cv_header_dir=no
+for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
+ AC_CHECKING([for $ac_hdr])
+AC_TEST_LINK([#include <sys/types.h>
+#include <$ac_hdr>], [DIR *dirp = 0;], ac_cv_header_dir=$ac_hdr; break)
+done])dnl
+case "$ac_cv_header_dir" in
+dirent.h) AC_DEFINE(DIRENT) ;;
+sys/ndir.h) AC_DEFINE(SYSNDIR) ;;
+sys/dir.h) AC_DEFINE(SYSDIR) ;;
+ndir.h) AC_DEFINE(NDIR) ;;
+esac
AC_CHECKING(for closedir return value)
-AC_TEST_RUN([#include <sys/types.h>
-#include <$ac_dir_header>
-int closedir(); main() { exit(closedir(opendir(".")) != 0); }], ,
-AC_DEFINE(VOID_CLOSEDIR))
+AC_CACHE_VAL(ac_cv_func_closedir_void,
+[AC_TEST_RUN([#include <sys/types.h>
+#include <$ac_cv_header_dir>
+int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
+ ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes)])dnl
+if test $ac_cv_func_closedir_void = yes; then
+ AC_DEFINE(VOID_CLOSEDIR)
+fi
])dnl
-dnl Subroutine of AC_DIR_HEADER.
-dnl Check if $1 is the winning directory library header file.
-dnl It must not only exist, but also correctly define the `DIR' type.
-dnl If it is really winning, define $2 and set shell var `ac_dir_header' to $1.
-define(AC_DIR_HEADER_CHECK, [dnl
-if test -z "$ac_dir_header"; then
- AC_CHECKING([for $1])
- AC_TEST_LINK([#include <sys/types.h>
-#include <]$1[>],
- [DIR *dirp = 0;],
- AC_DEFINE($2) ac_dir_header=$1)dnl
-fi])dnl
dnl
-define(AC_STAT_MACROS_BROKEN,[AC_CHECKING(for broken stat file mode macros)
-AC_PROGRAM_EGREP([You lose], [#include <sys/types.h>
+define(AC_STAT_MACROS_BROKEN,
+[AC_CHECKING(for broken stat file mode macros)
+AC_CACHE_VAL(ac_cv_header_stat_broken,
+[AC_PROGRAM_EGREP([You lose], [#include <sys/types.h>
#include <sys/stat.h>
#ifdef S_ISBLK
#if S_ISBLK (S_IFDIR)
You lose.
#endif
#endif /* S_ISSOCK */
-], AC_DEFINE(STAT_MACROS_BROKEN))])dnl
+], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])dnl
+if test $ac_cv_header_stat_broken = yes; then
+ AC_DEFINE(STAT_MACROS_BROKEN)
+fi
+])dnl
dnl
-define(AC_SYS_SIGLIST_DECLARED,[dnl
-AC_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
-AC_TEST_LINK([#include <signal.h>
+define(AC_SYS_SIGLIST_DECLARED,
+[AC_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
+AC_CACHE_VAL(ac_cv_decl_sys_siglist,
+[AC_TEST_LINK([#include <sys/types.h>
+#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h. */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif], [char *msg = *(sys_siglist + 1);],
- AC_DEFINE(SYS_SIGLIST_DECLARED))])dnl
+ ac_cv_decl_sys_siglist=yes, ac_cv_decl_sys_siglist=no)])dnl
+if test $ac_cv_decl_sys_siglist = yes; then
+ AC_DEFINE(SYS_SIGLIST_DECLARED)
+fi
+])dnl
dnl
dnl
dnl ### Checks for typedefs
define(AC_GETGROUPS_T,
[AC_REQUIRE([AC_UID_T])dnl
AC_CHECKING(for type of array argument to getgroups)
-changequote(,)dnl
-dnl Do not put single quotes in the C program text!!
+AC_CACHE_VAL(ac_cv_type_getgroups,
+[changequote(,)dnl
+dnl Do not put single quotes in the C program text!
ac_prog='/* Thanks to Mike Rendell for this test. */
#include <sys/types.h>
#define NGID 256
}'
changequote([,])dnl
AC_TEST_RUN([$ac_prog],
- AC_DEFINE(GETGROUPS_T, gid_t), AC_DEFINE(GETGROUPS_T, int))
+ ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int)])dnl
+AC_DEFINE(GETGROUPS_T, $ac_cv_type_getgroups)
])dnl
dnl
define(AC_UID_T,
[AC_PROVIDE([$0])dnl
AC_CHECKING(for uid_t in sys/types.h)
-AC_HEADER_EGREP(uid_t, sys/types.h, ,
- AC_DEFINE(uid_t, int) AC_DEFINE(gid_t, int))])dnl
+AC_CACHE_VAL(ac_cv_type_uid_t,
+[AC_HEADER_EGREP(uid_t, sys/types.h,
+ ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])dnl
+if test $ac_cv_type_uid_t = no; then
+ AC_DEFINE(uid_t, int)
+ AC_DEFINE(gid_t, int)
+fi
+])dnl
dnl
-define(AC_SIZE_T,
-[AC_CHECKING(for size_t in sys/types.h)
-AC_HEADER_EGREP(size_t, sys/types.h, , AC_DEFINE(size_t, unsigned))])dnl
+define(AC_SIZE_T, [AC_CHECK_TYPE(size_t, unsigned)])dnl
dnl
-define(AC_PID_T,
-[AC_PROVIDE([$0])dnl
-AC_CHECKING(for pid_t in sys/types.h)
-AC_HEADER_EGREP(pid_t, sys/types.h, , AC_DEFINE(pid_t, int))])dnl
+define(AC_PID_T, [AC_CHECK_TYPE(pid_t, int)])dnl
dnl
define(AC_OFF_T,
[AC_PROVIDE([$0])dnl
-AC_CHECKING(for off_t in sys/types.h)
-AC_HEADER_EGREP(off_t, sys/types.h, , AC_DEFINE(off_t, long))])dnl
+AC_CHECK_TYPE(off_t, long)])dnl
dnl
-define(AC_MODE_T,
-[AC_CHECKING(for mode_t in sys/types.h)
-AC_HEADER_EGREP(mode_t, sys/types.h, , AC_DEFINE(mode_t, int))])dnl
+define(AC_MODE_T, [AC_CHECK_TYPE(mode_t, int)])dnl
dnl
dnl Note that identifiers starting with SIG are reserved by ANSI C.
define(AC_RETSIGTYPE,
[AC_PROVIDE([$0])dnl
AC_CHECKING([return type of signal handlers])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_type_signal,
+[AC_TEST_LINK([#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();],
-[int i;],
-[AC_DEFINE(RETSIGTYPE, void)],
-[AC_DEFINE(RETSIGTYPE, int)])]
-)dnl
+[int i;], ac_cv_type_signal=void, ac_cv_type_signal=int)])dnl
+AC_DEFINE(RETSIGTYPE, $ac_cv_type_signal)
+])dnl
dnl
dnl
dnl ### Checks for functions
dnl
dnl
-define(AC_MMAP, [
-AC_CHECKING(for working mmap)
-AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
+define(AC_MMAP,
+[AC_CHECKING(for working mmap)
+AC_CACHE_VAL(ac_cv_func_mmap,
+[AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>
exit(1);
exit(0);
}
-], AC_DEFINE(HAVE_MMAP))
+], ac_cv_func_mmap=yes, ac_cv_func_mmap=no)])dnl
+if test $ac_cv_func_mmap = yes; then
+ AC_DEFINE(HAVE_MMAP)
+fi
])dnl
dnl
define(AC_VPRINTF,
[AC_REQUIRE([AC_PID_T])dnl
AC_HEADER_CHECK(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_CHECKING(for working vfork)
-AC_REQUIRE([AC_RETSIGTYPE])
+AC_CACHE_VAL(ac_cv_func_vfork,
+[AC_REQUIRE([AC_RETSIGTYPE])
AC_TEST_RUN([/* Thanks to Paul Eggert for this test. */
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
+/* On sparc systems, changes by the child to local and incoming
+ argument registers are propagated back to the parent.
+ The compiler is told about this with #include <vfork.h>,
+ but some compilers (e.g. gcc -O) don't grok <vfork.h>.
+ Test for this by using a static variable whose address
+ is put into a register that is clobbered by the vfork. */
+static
+sparc_address_test (arg) int arg; {
+ static pid_t child;
+ if (!child) {
+ child = vfork ();
+ if (child < 0)
+ perror ("vfork");
+ if (!child) {
+ arg = getpid();
+ write(-1, "", 0);
+ _exit (arg);
+ }
+ }
+}
static int signalled;
static RETSIGTYPE catch (s) int s; { signalled = 1; }
main() {
pid_t parent = getpid ();
pid_t child;
+ sparc_address_test ();
+
signal (SIGINT, catch);
child = vfork ();
if (child == 0) {
- /* On sparc systems, changes by the child to local and incoming
- argument registers are propagated back to the parent.
- The compiler is told about this with #include <vfork.h>,
- but some compilers (e.g. gcc -O) don't grok <vfork.h>.
- Test for this by using lots of local variables, at least
+ /* Here is another test for sparc vfork register problems.
+ This test uses lots of local variables, at least
as many local variables as main has allocated so far
including compiler temporaries. 4 locals are enough for
gcc 1.40.3 on a sparc, but we use 8 to be safe.
|| fstat(fileno(stdout), &st) != 0
);
}
-}], , AC_DEFINE(vfork, fork))
+}], ac_cv_func_vfork=yes, ac_cv_func_vfork=no)])dnl
+if test $ac_cv_func_vfork = no; then
+ AC_DEFINE(vfork, fork)
+fi
])dnl
dnl
define(AC_WAIT3,
[AC_CHECKING(for wait3 that fills in rusage)
-AC_TEST_RUN([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_func_wait3,
+[AC_TEST_RUN([#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
exit(r.ru_nvcsw == 0
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
}
-}], AC_DEFINE(HAVE_WAIT3))
+}], ac_cv_func_wait3=yes, ac_cv_func_wait3=no)])dnl
+if test $ac_cv_func_wait3 = yes; then
+ AC_DEFINE(HAVE_WAIT3)
+fi
])dnl
dnl
define(AC_ALLOCA,
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_CHECKING([for working alloca.h])
-AC_TEST_LINK([#include <alloca.h>],
- [char *p = alloca(2 * sizeof(int));], AC_DEFINE(HAVE_ALLOCA_H))
+AC_CACHE_VAL(ac_cv_header_alloca_h,
+[AC_TEST_LINK([#include <alloca.h>], [char *p = alloca(2 * sizeof(int));],
+ ac_cv_header_alloca_h=yes, ac_cv_header_alloca_h=no)])dnl
+if test $ac_cv_header_alloca_h = yes; then
+ AC_DEFINE(HAVE_ALLOCA_H)
+fi
-ac_decl="#ifdef __GNUC__
+AC_CHECKING([for alloca])
+AC_CACHE_VAL(ac_cv_func_alloca,
+[AC_TEST_LINK([#ifdef __GNUC__
#define alloca __builtin_alloca
#else
#if HAVE_ALLOCA_H
#endif
#endif
#endif
-"
-AC_CHECKING([for alloca])
-AC_TEST_LINK($ac_decl,
-[char *p = (char *) alloca(1);],
-[ac_have_alloca=yes AC_DEFINE([HAVE_ALLOCA])], ac_have_alloca=no)
+], [char *p = (char *) alloca(1);],
+ ac_cv_func_alloca=yes, ac_cv_func_alloca=no)])dnl
+if test $ac_cv_func_alloca = yes; then
+ AC_DEFINE(HAVE_ALLOCA)
+fi
-if test "$ac_have_alloca" = no; then
+if test $ac_cv_func_alloca = no; then
# The SVR3 libPW and SVR4 libucb both contain incompatible functions
# that cause trouble. Some versions do not even contain alloca or
# contain a buggy version. If you still want to use their alloca,
wenotbecray
#endif
],
-AC_FUNC_CHECK([_getb67],AC_DEFINE([CRAY_STACKSEG_END],[_getb67]),
-AC_FUNC_CHECK([GETB67],AC_DEFINE([CRAY_STACKSEG_END],[GETB67]),
-AC_FUNC_CHECK([getb67],AC_DEFINE([CRAY_STACKSEG_END],[getb67])))))
+AC_FUNC_CHECK([_getb67],AC_DEFINE(CRAY_STACKSEG_END, _getb67),
+AC_FUNC_CHECK([GETB67],AC_DEFINE(CRAY_STACKSEG_END, GETB67),
+AC_FUNC_CHECK([getb67],AC_DEFINE(CRAY_STACKSEG_END, getb67)))))
AC_CHECKING(stack direction for C alloca)
-AC_TEST_RUN([find_stack_direction ()
+AC_CACHE_VAL(ac_cv_c_stack_direction,
+[AC_TEST_RUN([find_stack_direction ()
{
static char *addr = 0;
auto char dummy;
main ()
{
exit (find_stack_direction() < 0);
-}],
-AC_DEFINE(STACK_DIRECTION,1), AC_DEFINE(STACK_DIRECTION,-1),
-AC_DEFINE(STACK_DIRECTION,0))
+}], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
+ ac_cv_c_stack_direction=0)])dnl
+AC_DEFINE(STACK_DIRECTION, $ac_cv_c_stack_direction)
fi
AC_SUBST(ALLOCA)dnl
])dnl
dnl
define(AC_GETLOADAVG,
[# Some definitions of getloadavg require that the program be installed setgid.
-AC_SUBST(NEED_SETGID)NEED_SETGID=false
-ac_need_func=yes
+NEED_SETGID=false
+AC_SUBST(NEED_SETGID)dnl
+ac_have_func=no
# Check for the 4.4BSD definition of getloadavg.
-AC_HAVE_LIBRARY(util, LIBS="$LIBS -lutil" ac_need_func=no)
+AC_HAVE_LIBRARY(util, [LIBS="$LIBS -lutil" ac_have_func=yes
# Some systems with -lutil have (and need) -lkvm as well, some do not.
-AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")
+AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")])
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
# There is a commonly available library for RS/6000 AIX.
# Since it is not a standard part of AIX, it might be installed locally.
-ac_save_LIBS="$LIBS"
-LIBS="-L/usr/local/lib $LIBS"
-AC_HAVE_LIBRARY(getloadavg, LIBS="$LIBS -lgetloadavg" ac_need_func=no,
- LIBS="$ac_save_LIBS")
+ac_save_LIBS="$LIBS" LIBS="-L/usr/local/lib $LIBS"
+AC_HAVE_LIBRARY(getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
fi
-# Make sure it is really in the library, if we think we found it at all.
+# Make sure it is really in the library, if we think we found it.
AC_REPLACE_FUNCS(getloadavg)
-case "$LIBOBJS" in
-*getloadavg*)
-ac_need_func=yes
-AC_HEADER_CHECK(sys/dg_sys_info.h, [dnl
-AC_DEFINE(DGUX) ac_need_func=no
+if test $ac_cv_func_getloadavg = yes; then
+ AC_DEFINE(HAVE_GETLOADAVG)
+else
+ac_have_func=no
+AC_HEADER_CHECK(sys/dg_sys_info.h,
+[ac_have_func=yes AC_DEFINE(DGUX)
# Some versions of DGUX need -ldgc for dg_sys_info.
AC_HAVE_LIBRARY(dgc)])
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
# Irix 4.0.5F has the header but not the library.
-AC_HAVE_LIBRARY(elf, AC_DEFINE(SVR4) LIBS="$LIBS -lelf" ac_need_func=no
- AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm"))
+AC_HAVE_LIBRARY(elf,
+ [LIBS="$LIBS -lelf" ac_have_func=yes AC_DEFINE(SVR4)
+ AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")])
fi
-if test "$ac_need_func" = yes; then
-AC_HEADER_CHECK(inq_stats/cpustats.h, AC_DEFINE(UMAX4_3) AC_DEFINE(UMAX)
- ac_need_func=no)
+if test $ac_have_func = no; then
+AC_HEADER_CHECK(inq_stats/cpustats.h,
+ [ac_have_func=yes AC_DEFINE(UMAX4_3) AC_DEFINE(UMAX)])
fi
-if test "$ac_need_func" = yes; then
-AC_HEADER_CHECK(sys/cpustats.h, AC_DEFINE(UMAX) ac_need_func=no)
+if test $ac_have_func = no; then
+AC_HEADER_CHECK(sys/cpustats.h,
+ [ac_have_func=yes AC_DEFINE(UMAX)])
fi
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
AC_HAVE_HEADERS(mach/mach.h)
fi
AC_HEADER_CHECK(nlist.h,
[AC_DEFINE(NLIST_STRUCT)
AC_CHECKING([for n_un in struct nlist])
-AC_TEST_LINK([#include <nlist.h>],
+AC_CACHE_VAL(ac_cv_struct_nlist_n_un,
+[AC_TEST_LINK([#include <nlist.h>],
[struct nlist n; n.n_un.n_name = 0;],
-AC_DEFINE(NLIST_NAME_UNION))])dnl
+ac_cv_struct_nlist_n_un=yes, ac_cv_struct_nlist_n_un=no)])dnl
+if test $ac_cv_struct_nlist_n_un = yes; then
+ AC_DEFINE(NLIST_NAME_UNION)
+fi
+])dnl
-# Figure out whether we will need to install setgid.
-AC_PROGRAM_EGREP([Yowza Am I SETGID yet], [dnl
-#include "${srcdir}/getloadavg.c"
+AC_CHECKING(whether getloadavg requires setgid)
+AC_CACHE_VAL(ac_cv_func_getloadavg_setgid,
+[AC_PROGRAM_EGREP([Yowza Am I SETGID yet],
+[#include "${srcdir}/getloadavg.c"
#ifdef LDAV_PRIVILEGED
Yowza Am I SETGID yet
-#endif], [AC_DEFINE(GETLOADAVG_PRIVILEGED) NEED_SETGID=true])dnl
-;;
+#endif],
+ ac_cv_func_getloadavg_setgid=yes, ac_cv_func_getloadavg_setgid=no)])dnl
+if test $ac_cv_func_getloadavg_setgid = yes; then
+ NEED_SETGID=true AC_DEFINE(GETLOADAVG_PRIVILEGED)
+fi
-*) AC_DEFINE(HAVE_GETLOADAVG) ;;
-esac
+fi # Do not have getloadavg in system libraries.
if test "$NEED_SETGID" = true; then
-AC_SUBST(KMEM_GROUP)dnl
- # Figure out what group owns /dev/kmem.
- # The installed program will need to be setgid and owned by that group.
-changequote(,)dnl
+ AC_CHECKING(group of /dev/kmem)
+AC_CACHE_VAL(ac_cv_group_kmem,
+[changequote(,)dnl
# On Solaris, /dev/kmem is a symlink. Get info on the real file.
ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
# If we got an error (system does not support symlinks), try without -L.
test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
- KMEM_GROUP=`echo $ac_ls_output \
+ ac_cv_group_kmem=`echo $ac_ls_output \
| sed -ne 's/[ ][ ]*/ /g;
s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
/ /s/.* //;p;'`
changequote([,])dnl
+])dnl
+ KMEM_GROUP=$ac_cv_group_kmem
AC_VERBOSE(/dev/kmem is owned by $KMEM_GROUP)
fi
+AC_SUBST(KMEM_GROUP)dnl
])dnl
dnl
define(AC_UTIME_NULL,
[AC_CHECKING(utime with null argument)
-rm -f conftestdata; > conftestdata
+AC_CACHE_VAL(ac_cv_func_utime_null,
+[rm -f conftestdata; > conftestdata
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_TEST_RUN([#include <sys/types.h>
#include <sys/stat.h>
exit(!(stat ("conftestdata", &s) == 0 && utime("conftestdata", (long *)0) == 0
&& stat("conftestdata", &t) == 0 && t.st_mtime >= s.st_mtime
&& t.st_mtime - s.st_mtime < 120));
-}], AC_DEFINE(HAVE_UTIME_NULL))
-rm -f core
+}], ac_cv_func_utime_null=yes, ac_cv_func_utime_null=no)
+rm -f core])dnl
+if test $ac_cv_func_utime_null = yes; then
+ AC_DEFINE(HAVE_UTIME_NULL)
+fi
])dnl
dnl
-define(AC_STRCOLL, [AC_CHECKING(for strcoll)
-AC_TEST_RUN([#include <string.h>
+define(AC_STRCOLL,
+[AC_CHECKING(for strcoll)
+AC_CACHE_VAL(ac_cv_func_strcoll,
+[AC_TEST_RUN([#include <string.h>
main ()
{
exit (strcoll ("abc", "def") >= 0 ||
strcoll ("ABC", "DEF") >= 0 ||
strcoll ("123", "456") >= 0);
-}], AC_DEFINE(HAVE_STRCOLL))])dnl
+}], ac_cv_func_strcoll=yes, ac_cv_func_strcoll=no)])dnl
+if test $ac_cv_func_strcoll = yes; then
+ AC_DEFINE(HAVE_STRCOLL)
+fi
+])dnl
dnl
define(AC_SETVBUF_REVERSED,
[AC_CHECKING(whether setvbuf arguments are reversed)
-AC_TEST_RUN([#include <stdio.h>
+AC_CACHE_VAL(ac_cv_func_setvbuf_reversed,
+[AC_TEST_RUN([#include <stdio.h>
/* If setvbuf has the reversed format, exit 0. */
main () {
/* This call has the arguments reversed.
exit(1);
putc('\r', stdout);
exit(0); /* Non-reversed systems segv here. */
-}], AC_DEFINE(SETVBUF_REVERSED))
-rm -f core
+}], ac_cv_func_setvbuf_reversed=yes, ac_cv_func_setvbuf_reversed=no)
+rm -f core])dnl
+if test $ac_cv_func_setvbuf_reversed = yes; then
+ AC_DEFINE(SETVBUF_REVERSED)
+fi
])dnl
dnl
dnl
define(AC_STRUCT_TM,
[AC_PROVIDE([$0])dnl
AC_CHECKING([for struct tm in sys/time.h instead of time.h])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_tm,
+[AC_TEST_LINK([#include <sys/types.h>
#include <time.h>],
-[struct tm *tp; tp->tm_sec;], , AC_DEFINE(TM_IN_SYS_TIME))])dnl
+[struct tm *tp; tp->tm_sec;],
+ ac_cv_struct_tm=time.h, ac_cv_struct_tm=sys/time.h)])dnl
+if test $ac_cv_struct_tm = sys/time.h; then
+ AC_DEFINE(TM_IN_SYS_TIME)
+fi
+])dnl
dnl
define(AC_TIME_WITH_SYS_TIME,
[AC_CHECKING([whether time.h and sys/time.h may both be included])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_header_time,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/time.h>
#include <time.h>],
-[struct tm *tp;], AC_DEFINE(TIME_WITH_SYS_TIME))])dnl
+[struct tm *tp;], ac_cv_header_time=yes, ac_cv_header_time=no)])dnl
+if test $ac_cv_header_time = yes; then
+ AC_DEFINE(TIME_WITH_SYS_TIME)
+fi
+])dnl
dnl
define(AC_TIMEZONE,
[AC_REQUIRE([AC_STRUCT_TM])dnl
-ac_decl='#include <sys/types.h>
-'
-case "$DEFS" in
- *TM_IN_SYS_TIME*) ac_decl="$ac_decl
-#include <sys/time.h>
-" ;;
- *) ac_decl="$ac_decl
-#include <time.h>
-" ;;
-esac
AC_CHECKING([for tm_zone in struct tm])
-AC_TEST_LINK($ac_decl,
-[struct tm tm; tm.tm_zone;],
-[ac_have_tm_zone=yes AC_DEFINE(HAVE_TM_ZONE)], ac_have_tm_zone=no)
-
-if test "$ac_have_tm_zone" = no; then
-AC_CHECKING([for tzname])
-AC_TEST_LINK(changequote(<<,>>)dnl
+AC_CACHE_VAL(ac_cv_struct_tm_zone,
+[AC_TEST_LINK([#include <sys/types.h>
+#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_zone;],
+ ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no)])dnl
+if test "$ac_cv_struct_tm_zone" = yes; then
+ AC_DEFINE(HAVE_TM_ZONE)
+else
+ AC_CHECKING([for tzname])
+AC_CACHE_VAL(ac_cv_var_tzname,
+[AC_TEST_LINK(changequote(<<,>>)dnl
<<#include <time.h>
#ifndef tzname /* For SGI. */
extern char *tzname[]; /* RS6000 and others reject char **tzname. */
#endif>>, changequote([,])dnl
-[atoi(*tzname);], AC_DEFINE(HAVE_TZNAME))
+[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])dnl
+ if test $ac_cv_var_tzname = yes; then
+ AC_DEFINE(HAVE_TZNAME)
+ fi
fi
])dnl
dnl
define(AC_ST_BLOCKS,
[AC_CHECKING([for st_blocks in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_blocks,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_blocks;],
-AC_DEFINE(HAVE_ST_BLOCKS), LIBOBJS="$LIBOBJS fileblocks.o")dnl
+ac_cv_struct_st_blocks=yes, ac_cv_struct_st_blocks=no)])dnl
+if test $ac_cv_struct_st_blocks = yes; then
+ AC_DEFINE(HAVE_ST_BLOCKS)
+else
+ LIBOBJS="$LIBOBJS fileblocks.o"
+fi
AC_SUBST(LIBOBJS)dnl
])dnl
dnl
define(AC_ST_BLKSIZE,
[AC_CHECKING([for st_blksize in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_blksize,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_blksize;],
-AC_DEFINE(HAVE_ST_BLKSIZE))])dnl
+ac_cv_struct_st_blksize=yes, ac_cv_struct_st_blksize=no)])dnl
+if test $ac_cv_struct_st_blksize = yes; then
+ AC_DEFINE(HAVE_ST_BLKSIZE)
+fi
+])dnl
dnl
define(AC_ST_RDEV,
[AC_CHECKING([for st_rdev in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_rdev,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_rdev;],
-AC_DEFINE(HAVE_ST_RDEV))])dnl
+ac_cv_struct_st_rdev=yes, ac_cv_struct_st_rdev=no)])dnl
+if test $ac_cv_struct_st_rdev = yes; then
+ AC_DEFINE(HAVE_ST_RDEV)
+fi
+])dnl
dnl
dnl
dnl ### Checks for compiler characteristics
dnl
define(AC_CROSS_CHECK,
[AC_PROVIDE([$0])dnl
-AC_CHECKING(whether cross-compiling)
# If we cannot run a trivial program, we must be cross compiling.
-AC_TEST_RUN([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
-if test "$cross_compiling" = yes; then
+AC_CHECKING(whether cross-compiling)
+AC_CACHE_VAL(ac_cv_c_cross,
+[AC_TEST_RUN([main(){exit(0);}], ac_cv_c_cross=no, ac_cv_c_cross=yes)])dnl
+cross_compiling=$ac_cv_c_cross
+if test $ac_cv_c_cross = yes; then
AC_VERBOSE(we are cross-compiling)
+else
+ AC_VERBOSE(we are not cross-compiling)
fi])dnl
dnl
define(AC_CHAR_UNSIGNED,
[AC_CHECKING(for unsigned characters)
-AC_TEST_RUN(
+AC_CACHE_VAL(ac_cv_c_char_unsigned,
+[AC_TEST_RUN(
[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
#if !__STDC__
#define volatile
#else
volatile char c = 255; exit(c < 0);
#endif
-}], AC_DEFINE(__CHAR_UNSIGNED__))]
-)dnl
+}], ac_cv_c_char_unsigned=yes, ac_cv_c_char_unsigned=no)])dnl
+if test $ac_cv_c_char_unsigned = yes; then
+ AC_DEFINE(__CHAR_UNSIGNED__)
+fi
+])dnl
dnl
define(AC_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_CHECKING(for long double)
-if test "$GCC" = yes; then
-AC_DEFINE(HAVE_LONG_DOUBLE)
+AC_CACHE_VAL(ac_cv_c_long_double,
+[if test "$GCC" = yes; then
+ ac_cv_c_long_double=yes
else
AC_TEST_RUN([int main() {
/* The Stardent Vistra knows sizeof(long double), but does not support it. */
long double foo = 0.0;
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
exit(sizeof(long double) < sizeof(double)); }],
-AC_DEFINE(HAVE_LONG_DOUBLE))
+ac_cv_c_long_double=yes, ac_cv_c_long_double=no)
+fi])dnl
+if test $ac_cv_c_long_double = yes; then
+ AC_DEFINE(HAVE_LONG_DOUBLE)
fi
])dnl
dnl
dnl
define(AC_WORDS_BIGENDIAN,
[AC_CHECKING(byte ordering)
-AC_TEST_RUN([main () {
+AC_CACHE_VAL(ac_cv_c_bigendian,
+[AC_TEST_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
-}], , AC_DEFINE(WORDS_BIGENDIAN))
+}], ac_cv_c_bigendian=no, ac_cv_c_bigendian=yes)])dnl
+if test $ac_cv_c_bigendian = yes; then
+ AC_DEFINE(WORDS_BIGENDIAN)
+fi
])dnl
dnl
define(AC_ARG_ARRAY,
[AC_CHECKING(whether the address of an argument can be used as an array)
-AC_TEST_RUN([main() {
+AC_CACHE_VAL(ac_cv_c_arg_array,
+[AC_TEST_RUN([main() {
/* Return 0 iff arg arrays are ok. */
exit(!x(1, 2, 3, 4));
}
/* Return 1 iff arg arrays are ok. */
y(a, b) int *b; {
return a == 1 && b[0] == 2 && b[1] == 3 && b[2] == 4;
-}], , AC_DEFINE(NO_ARG_ARRAY))
-rm -f core
+}], ac_cv_c_arg_array=no, ac_cv_c_arg_array=yes)
+rm -f core])dnl
+if test $ac_cv_c_arg_array = no; then
+ AC_DEFINE(NO_ARG_ARRAY)
+fi
])dnl
dnl
define(AC_INLINE,
[AC_REQUIRE([AC_PROG_CC])dnl
-if test "$GCC" = yes; then
AC_CHECKING([for inline])
-AC_TEST_LINK( , [} inline foo() {], , AC_DEFINE(inline, __inline))
+AC_CACHE_VAL(ac_cv_c_inline,
+[if test "$GCC" = yes; then
+AC_TEST_LINK( , [} inline foo() {], ac_cv_c_inline=yes, ac_cv_c_inline=no)
+else
+ ac_cv_c_inline=no
+fi])dnl
+if test $ac_cv_c_inline = no; then
+ AC_DEFINE(inline, __inline)
fi
])dnl
define(AC_CONST,
+[dnl Do not "break" this again.
+AC_CHECKING([for lack of working const])
+AC_CACHE_VAL(ac_cv_c_const,
[changequote(,)dnl
-dnl Do not put single quotes in the C program text!!
+dnl Do not put single quotes in the C program text!
ac_prog='/* Ultrix mips cc rejects this. */
typedef int charset[2]; const charset x;
/* SunOS 4.1.1 cc rejects this. */
const int foo = 10;
}'
changequote([,])dnl
-dnl Do not "break" this again.
-AC_CHECKING([for lack of working const])
-AC_TEST_LINK( , [$ac_prog], , AC_DEFINE(const,))])dnl
+AC_TEST_LINK( , [$ac_prog], ac_cv_c_const=yes, ac_cv_c_const=no)])dnl
+if test $ac_cv_c_const = no; then
+ AC_DEFINE(const,)
+fi
+])dnl
dnl
dnl
dnl ### Checks for operating system services
dnl
dnl
-define(AC_HAVE_POUNDBANG, [dnl
-AC_CHECKING(whether [#]! works in shell scripts)
-echo '#!/bin/cat
+define(AC_HAVE_POUNDBANG,
+[AC_CHECKING(whether [#]! works in shell scripts)
+AC_CACHE_VAL(ac_cv_sys_interpreter,
+[echo '#!/bin/cat
exit 69
' > conftest
chmod u+x conftest
(SHELL=/bin/sh; export SHELL; ./conftest > /dev/null)
if test $? -ne 69; then
- :; $1
+ ac_cv_sys_interpreter=yes
else
- :; $2
+ ac_cv_sys_interpreter=no
+fi
+rm -f conftest])dnl
+if test $ac_cv_sys_interpreter = yes; then
+ ifelse([$1], , :, [$1])
+ifelse([$2], , , [else
+ $2
+])dnl
fi
-rm -f conftest
])dnl
define(AC_REMOTE_TAPE,
[AC_CHECKING(for remote tape and socket header files)
-AC_HEADER_CHECK(sys/mtio.h,
-[ac_have_mtio_h=yes AC_DEFINE(HAVE_SYS_MTIO_H)], ac_have_mtio_h=no)
+AC_HEADER_CHECK(sys/mtio.h, AC_DEFINE(HAVE_SYS_MTIO_H))
-if test "$ac_have_mtio_h" = yes; then
-AC_TEST_CPP([#include <sgtty.h>
-#include <sys/socket.h>], PROGS="$PROGS rmt")
+if test "$ac_cv_header_mtio_h" = yes; then
+AC_CACHE_VAL(ac_cv_header_rmt,
+[AC_TEST_CPP([#include <sgtty.h>
+#include <sys/socket.h>], ac_cv_header_rmt=yes, ac_cv_header_rmt=no)])dnl
+ if test $ac_cv_header_rmt = yes; then
+ PROGS="$PROGS rmt"
+ fi
fi
+AC_SUBST(PROGS)dnl
])dnl
dnl
define(AC_LONG_FILE_NAMES,
[AC_CHECKING(for long file names)
-ac_some_dir_failed=no
+AC_CACHE_VAL(ac_cv_sys_long_file_names,
+[ac_cv_sys_long_file_names=yes
# Test for long file names in all the places we know might matter:
# . the current directory, where building will happen
# /tmp where it might want to write temporary files
(echo 1 > $ac_dir/conftest9012345) 2>/dev/null
(echo 2 > $ac_dir/conftest9012346) 2>/dev/null
val=`cat $ac_dir/conftest9012345 2>/dev/null`
- test -f $ac_dir/conftest9012345 && test "$val" = 1 || ac_some_dir_failed=yes
+ if test ! -f $ac_dir/conftest9012345 || test "$val" != 1; then
+ ac_cv_sys_long_file_names=no
+ rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2> /dev/null
+ break
+ fi
rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2> /dev/null
-done
-test "$ac_some_dir_failed" = yes || AC_DEFINE(HAVE_LONG_FILE_NAMES)
+done])dnl
+if test $ac_cv_sys_long_file_names = yes; then
+ AC_DEFINE(HAVE_LONG_FILE_NAMES)
+fi
])dnl
dnl
define(AC_RESTARTABLE_SYSCALLS,
[AC_CHECKING(for restartable system calls)
-AC_TEST_RUN(
+AC_CACHE_VAL(ac_cv_sys_restartable_syscalls,
+[AC_TEST_RUN(
[/* Exit 0 (true) if wait returns something other than -1,
i.e. the pid of the child, which means that wait was restarted
after getting the signal. */
if (status == -1) wait(&i);
exit (status == -1);
}
-], AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS))
+], ac_cv_sys_restartable_syscalls=yes, ac_cv_sys_restartable_syscalls=no)])dnl
+if test $ac_cv_sys_restartable_syscalls = yes; then
+ AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS)
+fi
])dnl
dnl
define(AC_FIND_X,
# If we find X, set shell vars x_includes and x_libraries to the paths.
no_x=yes
if test "x$with_x" != xno; then
+
+# Command line options override cache.
+# FIXME We need to allow --x=includes= to work, I think.
+test -n "$x_includes" && ac_cv_x_includes="$x_includes"
+test -n "$x_libraries" && ac_cv_x_includes="$x_libraries"
+if test "${ac_cv_x_includes+set}" = set &&
+ test "${ac_cv_x_libraries+set}" = set; then
+ AC_VERBOSE(using cached values for ac_cv_x_includes and ac_cv_x_libraries)
+else
AC_FIND_X_XMKMF
-if test -z "$ac_im_usrlibdir"; then
+fi
+if test "${ac_cv_x_includes+set}" != set ||
+ test "${ac_cv_x_libraries+set}" != set; then
AC_FIND_X_DIRECT
fi
+test -z "$ac_cv_x_includes" && ac_cv_x_includes=NONE
+test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=NONE
+
+# FIXME can we reliably distinguish cache values that are set to empty
+# from those that aren't set?
+if test -z "$x_includes" && test "$ac_cv_x_includes" != NONE; then
+ x_includes="$ac_cv_x_includes"
+fi
+if test -z "$x_libraries" && test "$ac_cv_x_libraries" != NONE; then
+ x_libraries="$ac_cv_x_libraries"
+fi
+
test -n "$x_includes" && AC_VERBOSE(X11 headers are in $x_includes)
test -n "$x_libraries" && AC_VERBOSE(X11 libraries are in $x_libraries)
-fi
+fi # No --with-x=no.
])dnl
dnl
dnl Internal subroutine of AC_FIND_X.
fi
case "$ac_im_incroot" in
/usr/include) ;;
- *) test -z "$x_includes" && x_includes="$ac_im_incroot" ;;
+ *) test -z "$ac_cv_x_includes" && ac_cv_x_includes="$ac_im_incroot" ;;
esac
case "$ac_im_usrlibdir" in
/usr/lib | /lib) ;;
- *) test -z "$x_libraries" && x_libraries="$ac_im_usrlibdir" ;;
+ *) test -z "$ac_cv_x_libraries" && ac_cv_x_libraries="$ac_im_usrlibdir" ;;
esac
fi
cd ..
dnl Internal subroutine of AC_FIND_X.
define(AC_FIND_X_DIRECT,
[AC_CHECKING(for X include and library files directly)
-if test ".$x_direct_test_library" = . ; then
- x_direct_test_library='Xt'
-fi
-if test ".$x_direct_test_include" = . ; then
- x_direct_test_include='X11/Intrinsic.h'
-fi
+test -z "$x_direct_test_library" && x_direct_test_library=Xt
+test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
AC_TEST_CPP([#include <$x_direct_test_include>], no_x=,
for ac_dir in \
/usr/X11R6/include \
; \
do
if test -r "$ac_dir/$x_direct_test_include"; then
- test -z "$x_includes" && x_includes=$ac_dir
+ test -z "$ac_cv_x_includes" && ac_cv_x_includes=$ac_dir
no_x=
break
fi
# Check for the libraries. First see if replacing the include by
# lib works.
AC_HAVE_LIBRARY("$x_direct_test_library", no_x=,
-for ac_dir in `echo "$x_includes" | sed s/include/lib/` \
+for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
/usr/X11R6/lib \
/usr/X11R5/lib \
/usr/X11R4/lib \
do
for ac_extension in a so sl; do
if test -r $ac_dir/lib${x_direct_test_library}.$ac_extension; then
- test -z "$x_libraries" && x_libraries=$ac_dir
+ test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=$ac_dir
no_x=
break 2
fi
print_version=
while test $# -gt 0 ; do
- case "z${1}" in
- z-h | z--help | z--h* )
+ case "${1}" in
+ -h | --help | --h* )
echo "${usage}" 1>&2; exit 0 ;;
- z--macrodir=* | z--m*=* )
+ --macrodir=* | --m*=* )
AC_MACRODIR="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
shift ;;
- z-m | z--macrodir | z--m* )
+ -m | --macrodir | --m* )
shift
test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
AC_MACRODIR="${1}"
shift ;;
- z-v | z--version | z--v* )
+ -v | --version | --v* )
print_version="-DAC_PRINT_VERSION"
- infile=/dev/null tmpout=/dev/null
+ infile=/dev/null
shift ;;
- z-- ) # Stop option processing
+ -- ) # Stop option processing
shift; break ;;
- z- ) # Use stdin as input.
+ - ) # Use stdin as input.
break ;;
- z-* )
+ -* )
echo "${usage}" 1>&2; exit 1 ;;
* )
break ;;
tmpin=/tmp/acin.$$
infile=$tmpin
cat > $infile
- elif test ! -s "${infile}"; then
+ elif test ! -r "${infile}"; then
echo "autoconf: ${infile}: No such file or directory" >&2
exit 1
fi
$M4 $MACROFILES $infile > $tmpout || { st=$?; rm -f $tmpin $tmpout; exit $st; }
-test -n "$print_version" && exit 0
+if test -n "$print_version"; then
+ cat $tmpout
+ rm -f $tmpout
+ exit 0
+fi
# You could add your own prefixes to pattern if you wanted to check for
# them too, e.g. pattern="AC_\|ILT_", except that UNIX sed doesn't do
print_version=
while test $# -gt 0 ; do
- case "z${1}" in
- z-h | z--help | z--h* )
+ case "${1}" in
+ -h | --help | --h* )
echo "${usage}" 1>&2; exit 0 ;;
- z--macrodir=* | z--m*=* )
+ --macrodir=* | --m*=* )
AC_MACRODIR="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
shift ;;
- z-m | z--macrodir | z--m* )
+ -m | --macrodir | --m* )
shift
test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
AC_MACRODIR="${1}"
shift ;;
- z-v | z--version | z--v* )
+ -v | --version | --v* )
print_version="-DAC_PRINT_VERSION"
- infile=/dev/null tmpout=/dev/null
+ infile=/dev/null
shift ;;
- z-- ) # Stop option processing
+ -- ) # Stop option processing
shift; break ;;
- z- ) # Use stdin as input.
+ - ) # Use stdin as input.
break ;;
- z-* )
+ -* )
echo "${usage}" 1>&2; exit 1 ;;
* )
break ;;
tmpin=/tmp/acin.$$
infile=$tmpin
cat > $infile
- elif test ! -s "${infile}"; then
+ elif test ! -r "${infile}"; then
echo "autoconf: ${infile}: No such file or directory" >&2
exit 1
fi
$M4 $MACROFILES $infile > $tmpout || { st=$?; rm -f $tmpin $tmpout; exit $st; }
-test -n "$print_version" && exit 0
+if test -n "$print_version"; then
+ cat $tmpout
+ rm -f $tmpout
+ exit 0
+fi
# You could add your own prefixes to pattern if you wanted to check for
# them too, e.g. pattern="AC_\|ILT_", except that UNIX sed doesn't do
@c @setchapternewpage odd
@c %**end of header
-@set EDITION 1.93
-@set VERSION 1.93
+@set EDITION 1.94
+@set VERSION 1.94
@set UPDATED June 1994
@iftex
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
+* Manual Configuration:: Selecting features that can't be guessed.
* Writing Macros:: How to add your own macros to Autoconf.
+* Caching Values:: Speeding up subsequent @code{configure} runs.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
+* Invoking config.status:: Recreating a configuration.
+* Site Default Values:: Providing local defaults for @code{configure}.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
* Writing configure.in:: What to put in an Autoconf input file.
* Invoking autoconf:: How to create configuration scripts.
* Invoking autoheader:: How to create configuration header files.
+* Invoking autoscan:: Semi-automatic @file{configure.in} writing.
+* Invoking ifnames:: Listing the conditionals in source code.
+* Invoking autoreconf:: Remaking multiple @code{configure} scripts.
+* Invoking shindent:: Making @code{configure} scripts more readable.
Specific Tests
Running @code{configure} Scripts
-* Overriding variables:: Workarounds for unusual systems.
-* Invoking config.status:: Recreating a configuration.
+* Basic Installation:: Instructions for typical cases.
+* Build Directory:: Configuring in a different directory.
+* Installation Directories:: Installing in different directories.
+* System Type:: Specifying the system type.
+* Optional Features:: Selecting optional features.
+* Compilers and Options:: Selecting compilers and optimization.
An Example
* Writing configure.in:: What to put in an Autoconf input file.
* Invoking autoconf:: How to create configuration scripts.
* Invoking autoheader:: How to create configuration header files.
+* Invoking autoscan:: Semi-automatic @file{configure.in} writing.
+* Invoking ifnames:: Listing the conditionals in source code.
+* Invoking autoreconf:: Remaking multiple @code{configure} scripts.
+* Invoking shindent:: Making @code{configure} scripts more readable.
@end menu
@node Writing configure.in, Invoking autoconf, , Making configure Scripts
the Autoconf version number and exits, and @code{--help}, which prints a
summary of the command-line options and exits.
-@node Invoking autoheader, , Invoking autoconf, Making configure Scripts
+@node Invoking autoheader, Invoking autoscan, Invoking autoconf, Making configure Scripts
@section Invoking @code{autoheader}
You can use the @code{autoheader} program to create a template file of C
the Autoconf version number and exits, and @code{--help}, which prints a
summary of the command-line options and exits.
+@node Invoking autoscan, Invoking ifnames, Invoking autoheader, Making configure Scripts
+@section Invoking autoscan
+
+The @code{autoscan} program can help you create a @file{configure.in}
+file for a software package. @code{autoscan} examines source files in
+the directory given as a command line argument, or the current directory
+if none is given. It searches the source files for common portability
+problems and creates a file @file{configure.scan} which is a preliminary
+@file{configure.in} for that package. You should manually examine
+@file{configure.scan} before renaming it to @file{configure.in}; it will
+probably need some adjustments. If you want the package to use a
+configuration header file, you will have to add a call to
+@code{AC_CONFIG_HEADER}. You might have to change or add some
+@code{#if} directives in order to make the package work with Autoconf
+(@pxref{Invoking ifnames}, for information about a program that might
+help with that job).
+
+@code{autoscan} uses several data files, which are installed with the
+distributed Autoconf macro files, to determine which macros to output
+when it finds particular symbols in a package's source files. These
+files all have the same format. Each line consists of a symbol,
+whitespace, and the Autoconf macro to output if that symbol is
+encountered. Lines starting with @samp{#} are comments.
+
+@code{autoscan} is only installed if you already have Perl installed.
+
+@code{autoscan} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the data files in directory @var{dir} instead of the default
+installation directory.
+
+@item --verbose
+Print the names of the files it examines and the potentially interesting
+symbols it finds in them. This output can be voluminous.
+
+@item --version
+Print the version number of @code{autoscan} and exit.
+@end table
+
+@node Invoking ifnames, Invoking autoreconf, Invoking autoscan, Making configure Scripts
+@section Invoking ifnames
+
+@code{ifnames} can help when writing a @file{configure.in} for a
+software package. It prints the identifiers used in C preprocessor
+conditionals. If a package has already been set up to have some
+portability, this program can help you figure out what its
+@code{configure} needs to check for. It may fill in some gaps in a
+@file{configure.in} generated by @code{autoscan} (@pxref{Invoking autoscan}).
+
+@code{ifnames} scans all of the C source files named on the command line
+(or the standard input, if none are given) and writes to the standard
+output a sorted list of all the identifiers that appear in those files
+in @code{#if}, @code{#elif}, or @code{#ifdef} directives. It prints
+each identifier on a line, followed by a space-separated list of the
+files in which that identifier occurs.
+
+@noindent
+@code{ifnames} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory. Only used to get the version number.
+
+@item --version
+Print the version number of @code{ifnames} and exit.
+@end table
+
+@node Invoking autoreconf, Invoking shindent, Invoking ifnames, Making configure Scripts
+@section Invoking autoreconf
+
+If you have a lot of Autoconf-generated @code{configure} scripts and you
+get a new version of Autoconf, the @code{autoreconf} program can be
+handy. It runs @code{autoconf} (and @code{autoheader}, where
+appropriate) repeatedly to remake all of the Autoconf @code{configure}
+scripts in a directory tree.
+
+@noindent
+@code{autoreconf} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory.
+
+@item --verbose
+Print the name of each directory where @code{autoreconf} runs
+@code{autoconf} (and @code{autoheader}, if that directory's
+@file{configure.in} calls @code{AC_CONFIG_HEADER}).
+
+@item --version
+Print the version number of @code{autoreconf} and exit.
+@end table
+
+@node Invoking shindent, , Invoking autoreconf, Making configure Scripts
+@section Invoking shindent
+
+Autoconf-generated @code{configure} scripts can be somewhat hard to
+read, because they @emph{look} machine-generated---mainly because they
+do not use whitespace rationally. Unfortunately, it is impossible to do
+proper indentation using a macro processor like @code{m4}. However, if
+you have GNU @code{bash} installed, you can use the @code{shindent}
+program, which uses @code{bash} to give a Bourne shell script readable
+indentation.
+
+@code{shindent} indents each script named on the command line, backing
+up the original version using the original file name with @samp{~} appended.
+@code{shindent} places some restrictions on its input, due to the way it
+uses @code{bash} to do the indentation:
+
+@itemize @bullet
+@item
+It removes comments and blank lines between cases case statements.
+
+@item
+Doing odd things in case statements might cause odd problems.
+
+@item
+The script must not define any shell functions.
+
+@item
+If any string literals or here-documents contain lines that start
+with four spaces, those spaces will be removed.
+
+@item
+The script must not be @code{shindent} itself.
+@end itemize
+
+@noindent
+@code{shindent} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory. Only used to get the version number.
+
+@item --version
+Print the version number of @code{shindent} and exit.
+@end table
+
@node Specific Tests, General Purpose Macros, Making configure Scripts, Top
@chapter Specific Tests
@defmac AC_LN_S
@maindex LN_S
-If @samp{ln -s} works on the current filesystem (the O.S. and filesystem
-support symbolic links), set shell and @code{make} variable @code{LN_S}
-to @samp{ln -s}, otherwise set it to @samp{ln}.
+If @samp{ln -s} works on the current filesystem (the operating system
+and filesystem support symbolic links), set shell and @code{make}
+variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_MINUS_C_MINUS_O
@defmac AC_RSH
@maindex RSH
+@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
-If a remote shell is available, put @samp{rtapelib.o} in @code{make}
-variable @code{RTAPELIB}. Otherwise, also do so if @file{netdb.h}
-exists (implying the @code{rexec} function), and in addition define
-@code{HAVE_NETDB_H}. If neither a remote shell nor @code{rexec} is
-available, define @code{NO_REMOTE}.
+If a remote shell is available, set @code{make} variable @code{RSH} to
+its pathname. Otherwise, if @file{netdb.h} exists (implying the
+@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
+also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
+Otherwise, define @code{NO_REMOTE}.
@end defmac
@defmac AC_SET_MAKE
#if !STDC_HEADERS && HAVE_MEMORY_H
#include <memory.h>
#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
-#define index strchr
-#define rindex strrchr
-#define bcopy(s, d, n) memcpy ((d), (s), (n))
-#define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
-#define bzero(s, n) memset ((s), 0, (n))
#else /* not STDC_HEADERS and not HAVE_STRING_H */
#include <strings.h>
/* memory.h and strings.h conflict on some systems. */
+#ifndef strchr
+#define strchr index
+#endif
+#ifndef strrchr
+#define strrchr rindex
+#endif
+#ifndef memcpy
+#define memcpy(d, s, n) bcopy ((s), (d), (n))
+#endif
+#ifndef memcmp
+#define memcmp(s1, s2, n) bcmp ((s1), (s2), (n))
+#endif
#endif /* not STDC_HEADERS and not HAVE_STRING_H */
@end group
@end example
@noindent
-This example asssumes that your code uses the BSD style functions. If
-you use the System V/ANSI C style functions, you will need to replace
-the macro definitions with ones that go in the other direction.
+This example asssumes that your code uses the ANSI C/System V style
+functions. If you use the BSD style functions, replace the macro
+definitions with ones that go in the other direction. (Or, better,
+modernize your code.)
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
@maindex CROSS_CHECK
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
-variable @code{cross_compiling} to 1. This information can be used by
-@code{AC_TEST_RUN} to determine whether to take a default action
-instead of trying to run a test program (@pxref{C Features}).
+variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
+This information can be used by @code{AC_TEST_RUN} to determine whether
+to take a default action instead of trying to run a test program
+(@pxref{C Features}).
@end defmac
@defmac AC_CHAR_UNSIGNED
The following macros check for certain operating systems that need
special treatment for some programs, due to exceptional oddities in
-their header files or libraries:
+their header files or libraries. These macros are kludges; they should
+be replaced someday with a more systematic approach, based either on the
+functions they make available or the environments they provide.
@defmac AC_AIX
@maindex AIX
@code{AC_DIR_HEADER}.
@end defmac
-@node General Purpose Macros, Writing Macros, Specific Tests, Top
+@node General Purpose Macros, Manual Configuration, Specific Tests, Top
@chapter General Purpose Macros
These macros provide ways for other macros to control the kind of output
@defmac AC_CONFIG_SUBDIRS (@var{dir} @dots{})
@maindex CONFIG_SUBDIRS
Run @code{configure} in each subdirectory @var{dir} in the given
-whitespace-separated list If a given @var{dir} is not found, no error is
-reported, so a @code{configure} script can configure whichever parts of
-a large source tree are present. If a given @var{dir} contains
+whitespace-separated list. If a given @var{dir} is not found, no error
+is reported, so a @code{configure} script can configure whichever parts
+of a large source tree are present. If a given @var{dir} contains
@file{configure.in} but no @file{configure}, the Cygnus @code{configure}
-script found by @code{AC_CONFIG_AUXDIR} is used.
-
-The subdirectory @code{configure} scripts are given the same command
-line options that were given to this @code{configure} script, with minor
-changes if needed (e.g., to adjust a relative path for the cache file).
+script found by @code{AC_CONFIG_AUXDIR} is used. The subdirectory
+@code{configure} scripts are given the same command line options that
+were given to this @code{configure} script, with minor changes if needed
+(e.g., to adjust a relative path for the cache file or source
+directory). This macro also sets the shell and @code{make} variable
+@code{subdirs} to the list of directories @samp{@var{dir} @dots{}}.
+@file{Makefile} rules can use this variable to determine which
+subdirectories to recurse into.
@end defmac
@defmac AC_INIT (@var{unique-file-in-source-dir})
These macros check whether particular files exist.
-@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
+@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
-the specified library. @var{action-if-found} is a list of shell
+the library @var{library}. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
+
+If linking with @var{library} results in unresolved symbols, which would
+be resolved by linking with additional libraries, give those libraries
+as the @var{other-libraries} argument, separated by spaces: @samp{-lX11
+-lXt}. Otherwise this macro will fail to detect that @var{library} is
+present, because linking the test program will always fail with
+unresolved symbols.
@end defmac
@defmac AC_PREFIX (@var{program})
These macros check for features of the C compiler, libraries, and headers.
+@defmac AC_CHECK_TYPE (@var{type}, @var{default})
+@maindex CHECK_TYPE
+If the type @var{type} is not defined in @file{sys/types.h}, define it
+to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
+@samp{unsigned}.
+@end defmac
+
@defmac AC_COMPILE_CHECK (@var{echo-text}, @var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex COMPILE_CHECK
This is an obsolete alias for @code{AC_TEST_LINK}, with the addition that it
@end example
@end defmac
-@ignore
@defmac AC_SUBST_FILE (@var{variable}, @var{file})
@maindex SUBST_FILE
Substitute the contents of the file @file{@var{srcdir}/@var{file}} into
inserting @file{Makefile} fragments for particular host or tartet types
into @file{Makefile}s.
@end defmac
-@end ignore
@node Printing Messages, Language Choice, Setting Variables, General Purpose Macros
@section Printing Messages
@xref{Dependencies Between Macros}, for more information.
@end defmac
-@node Writing Macros, Makefiles, General Purpose Macros, Top
+@node Manual Configuration, Writing Macros, General Purpose Macros, Top
+@chapter Manual Configuration
+
+Some kinds of features can't be guessed automatically by running test
+programs. For example, how to allocate a pty, or the details of the
+object file format, or special options that need to be passed to the
+compiler or linker to provide a POSIX or ANSI C environment. It is
+possible to check for such features using ad-hoc means, such as having
+@code{configure} check the output of the @code{uname} program, or
+looking for libraries that are unique to particular systems. However,
+Autoconf provides a uniform method for handling unguessable features.
+
+Like other GNU @code{configure} scripts, Autoconf-generated
+@code{configure} scripts can make decisions based on a canonical name
+for the system type, which has the form:
+
+@example
+@var{cpu}-@var{company}-@var{system}
+@end example
+
+@code{configure} can usually guess the canonical name for the type of
+system it's running on. To do so it runs a script called
+@code{config.guess}, which derives the name using the @code{uname}
+command or symbols predefined by the C preprocessor.
+
+Alternately, the user can specify the system type with command line
+arguments to @code{configure}. Doing so is necessary when
+cross-compiling. In the most complex case of cross-compiling, three
+system types are involved. The options to specify them are:
+
+@table @code
+@item --build=@var{build-type}
+the type of system on which the package is being configured and
+compiled;
+
+@item --host=@var{host-type}
+the type of system on which the package will run;
+
+@item --target=@var{target-type}
+the type of system for which any compiler tools in the package will
+produce code.
+@end table
+
+@noindent
+If the user gives @code{configure} a non-option argument, it is used as
+the default for the host, target, and build system types if the user
+does not specify them explicitly with options. The target and build
+types default to the host type if it is given and they are not. Note
+that if you are cross-compiling, you still have to specify the names of
+the cross-tools you use, in particular the C compiler, on the
+@code{configure} and @code{make} command lines, e.g.,
+
+@example
+CC=m68k-coff-gcc configure --target=m68k-coff; CC=m68k-coff-gcc make
+@end example
+
+@code{configure} recognizes short aliases for many system types; for
+example, @samp{decstation} can be given on the command line instead of
+@samp{mips-dec-ultrix4.2}. @code{configure} runs a script called
+@code{config.sub} to canonicalize system type aliases.
+
+@defmac AC_CANONICAL_SYSTEM
+@maindex CANONICAL_SYSTEM
+Set shell and @code{make} variables to the names of the canonical system
+types. If the user did not specify one or more of those values on the
+command line, run @code{config.guess} to determine them. Run
+@code{config.sub} to canonicalize any aliases the user gave. If you use
+this macro, you must distribute those two shell scripts along with your
+source code (@pxref{Setup}, for information about the
+@code{AC_CONFIG_AUX_DIR} macro which you can use to control which
+directory @code{configure} looks for those scripts in). If you do not
+run this macro, @code{configure} ignores any @samp{--host}, etc. options
+given to it. The variables set are:
+
+@table @code
+@item @code{build}, @code{host}, @code{target}
+the canonical system names;
+
+@item @code{build_alias}, @code{host_alias}, @code{target_alias}
+the names the user specified, or the canonical names if
+@code{config.guess} was used;
+
+@item @code{build_cpu}, @code{build_vendor}, @code{build_os}
+@itemx @code{host_cpu}, @code{host_vendor}, @code{host_os}
+@itemx @code{target_cpu}, @code{target_vendor}, @code{target_os}
+the individual parts of the canonical names (for convenience).
+@end table
+@end defmac
+
+How do you use a canonical system type? Usually, you use it in one or
+more @code{case} statements in @file{configure.in} to select
+system-specific C files. Then link those files, which have names based
+on the system name, to generic names, such as @file{host.h} or
+@file{target.c}. The @code{case} statement patterns can use shell
+wildcards to group several cases together, like in this fragment:
+
+@example
+case "$target" in
+i386-*-mach* | i386-*-gnu*) obj_format=aout emulation=mach bfd_gas=yes ;;
+i960-*-bout) obj_format=bout ;;
+esac
+@end example
+
+@defmac AC_LINK_FILES (@var{link} @dots{}, @var{file} @dots{})
+@maindex LINK_FILES
+Link each of the existing files @var{file} to the corresponding link
+name @var{link}. Makes a symbolic link if possible, otherwise a hard
+link. For example, this call:
+
+@example
+AC_LINK_FILES(config/sun3.h config/aout.h, host.h object.h)
+@end example
+
+@noindent
+creates in the current directory @file{host.h}, which is a link to
+@file{@var{srcdir}/config/sun3.h}, and @file{object.h}, which is a link
+to @file{@var{srcdir}/config/aout.h}.
+@end defmac
+
+@node Writing Macros, Caching Values, Manual Configuration, Top
@chapter Writing Macros
If your package needs to test for some feature that none of the macros
prevent unwanted expansions of macros or @code{m4} builtins, such as
@samp{define} and @samp{$1}. Quotes are also required around macro
arguments that contain commas, since commas separate the arguments from
-each other.
+each other. It's a good idea to quote any macro arguments that contain
+newlines or calls to other macros, as well.
Autoconf (in @file{acgeneral.m4}) changes the @code{m4} quote characters
from the default @samp{`} and @samp{'} to @samp{[} and @samp{]}, because
@end group
@end example
-@node Makefiles, Invoking configure, Writing Macros, Top
+@node Caching Values, Makefiles, Writing Macros, Top
+@chapter Caching Values
+
+To avoid checking for the same features repeatedly in various
+@code{configure} scripts (or repeated runs of one script),
+@code{configure} saves the results of many of its checks in a @dfn{cache
+file}. If, when a @code{configure} script runs, it finds a cache file,
+it reads from it the results from previous runs and avoids rerunning
+those checks. As a result, @code{configure} can run much faster than if
+it had to perform all of the checks every time.
+
+The cache file is a shell script that caches the results of configure
+tests run on one system so they can be shared between configure scripts
+and configure runs. It is not useful on other systems. If its contents
+are invalid for some reason, the user may delete or edit it.
+
+By default, configure uses @file{./config.cache} as the cache file,
+creating it if it does not exist already. @code{configure} accepts the
+@samp{--cache-file=@var{file}} option to use a different cache file;
+that is what @code{configure} does when it calls @code{configure}
+scripts in subdirectories, so they share the cache. @xref{Setup}, for
+information on configuring subdirectories with the
+@code{AC_CONFIG_SUBDIRS} macro. @file{config.status} only pays
+attention to the cache file if it is given the @samp{--recheck} option,
+which makes it rerun @code{configure}.
+
+It is wrong to try to distribute cache files for particular system types.
+There is too much room for error in doing that, and too much
+administrative overhead in maintaining them. For any features that
+can't be guessed automatically, use the standard method of the canonical
+system type and linking files (@pxref{Manual Configuration}).
+
+The cache file on a particular system will gradually accumulate whenever
+someone runs a @code{configure} script; it will be initially
+nonexistent. Running @code{configure} merges the new cache results with
+the existing cache file. The site initialization script can specify a
+site-wide cache file to use instead of the default, to make it work
+transparently (@pxref{Site Default Values}).
+
+@defmac AC_CACHE_VAL (@var{cache-id}, @var{commands-to-set-it})
+@maindex CACHE_VAL
+Ensure that the results of the check identified by @var{cache-id} are
+available. If the results of the check were in the cache file that was
+read, print a verbose message saying so; otherwise, run the shell
+commands @var{commands-to-set-it}. Those commands should have no side
+effects except for setting the variable @var{cache-id}. In particular,
+they should not call @code{AC_DEFINE}; the code that follows the call to
+@code{AC_CACHE_VAL} should do that, based on the cached value. Also,
+they should not print any messages, for example with @code{AC_CHECKING};
+do that before calling @code{AC_CACHE_VAL}, so the messages are printed
+regardless of whether the results of the check are retrieved from the
+cache or determined by running the shell commands. If the shell
+commands are run to determine the value, the value will be saved in the
+cache file just before @code{configure} creates its output files.
+
+@noindent
+The names of cache variables should have this format:
+
+@example
+@var{package-prefix}_cv_@var{value-type}_@var{specific-value}@r{[}_@var{additional-options}@r{]}
+@end example
+
+@noindent
+for example, @samp{ac_cv_header_stat_broken} or
+@samp{ac_cv_prog_gcc_traditional}. The parts of the variable name are:
+
+@table @asis
+@item @var{package-prefix}
+An abbreviation for your package or organization; the same prefix you
+begin local Autoconf macros with, except lowercase by convention.
+For cache values used by the distributed Autoconf macros, this value is
+@samp{ac}.
+
+@item @code{_cv_}
+Indicates that this shell variable is a cache value.
+
+@item @var{value-type}
+A convention for classifying cache values, to produce a rational naming
+system. The values used in Autoconf are for the following classes of
+features; use them where applicable, otherwise invent your own categories:
+
+@table @code
+@item c
+C language
+
+@item func
+C functions
+
+@item group
+Unix groups
+
+@item header
+C header files
+
+@item lib
+C libraries
+
+@item path
+the absolute path names of programs
+
+@item prog
+the base names of programs
+
+@item struct
+C structures
+
+@item sys
+operating systems
+
+@item type
+C types
+
+@item var
+C variables in libraries
+
+@item x
+X Window System
+@end table
+
+@item @var{specific-value}
+Which member of the class of cache values this test applies to.
+For example, which function (@samp{alloca}), program (@samp{gcc}), or
+@code{make} variable (@samp{INSTALL}).
+
+@item @var{additional-options}
+Any particular behavior of the specific member that this test applies to.
+For example, @samp{broken} or @samp{set}. This part of the name may
+be omitted if it does not apply.
+@end table
+
+Like their names, the values the may be assigned to cache variables have
+a few restrictions. The values may not contain single quotes or curly braces.
+Usually, their values will be boolean (@samp{yes} or @samp{no}) or the
+names of files or functions; so this is not an important restriction.
+@end defmac
+
+@node Makefiles, Invoking configure, Caching Values, Top
@chapter Makefiles
Each subdirectory in a distribution should come with a file
touch $@{srcdir@}/stamp-h.in
# config.status might not change config.h
+# Don't rerun config.status if we just configured.
config.h: stamp-h
stamp-h: config.h.in config.status
- ./config.status
+ test ! -f stamp-h || ./config.status
touch stamp-h
Makefile: Makefile.in config.status
@xref{Invoking config.status}, for more information on handling
configuration-related dependencies.
-@node Invoking configure, Example, Makefiles, Top
+@node Invoking configure, Invoking config.status, Makefiles, Top
@chapter Running @code{configure} Scripts
A software package that uses a @code{configure} script
should be distributed with a file @file{Makefile.in}, but no
@file{Makefile}; that way, the user has to properly configure the
package for the local system before compiling it.
-Here is how to configure a package that uses a @code{configure} script.
-
-Normally, you just @code{cd} to the directory containing the package's
-source code and type @samp{./configure}. If you're using @code{csh} on
-an old version of System V, you might need to type @samp{sh configure}
-instead to prevent @code{csh} from trying to execute @code{configure}
-itself.
-
-Running @code{configure} takes awhile. While it is running, it
-prints some messages that tell what it is doing. If you don't want to
-see any messages, run @code{configure} with its standard output
-redirected to @file{/dev/null}; for example, @samp{./configure >/dev/null}.
-
-To compile the package in a different directory from the one containing
-the source code, you must use a version of @code{make} that supports the
-@code{VPATH} variable, such as GNU @code{make}. @code{cd} to the
-directory where you want the object files and executables to go and run
-the @code{configure} script. @code{configure} automatically checks for
-the source code in the directory that @code{configure} is in and in
-@file{..}. If for some reason @code{configure} is not in the source
-code directory that you are configuring, then it will report that it
-can't find the source code. In that case, run @code{configure} with the
-option @samp{--srcdir=@var{dir}}, where @var{dir} is the directory that
-contains the source code.
-
-By default, @samp{make install} will install the package's files in
-@file{/usr/local/bin}, @file{/usr/local/man}, etc. You can specify an
-installation prefix other than @file{/usr/local} by giving
-@code{configure} the option @samp{--prefix=@var{path}}. Alternately,
-you can do so by consistently giving a value for the @samp{prefix}
-variable when you run @code{make}, e.g.,
-@example
-make prefix=/usr/gnu
-make prefix=/usr/gnu install
-@end example
-
-You can specify separate installation prefixes for architecture-specific
-files and architecture-independent files. If you give @code{configure}
-the option @samp{--exec-prefix=@var{path}} or set the @code{make}
-variable @samp{exec_prefix} to @var{path}, the package will use
-@var{path} as the prefix for installing programs and libraries. Data
-files and documentation will still use the regular prefix. Normally,
-all files are installed using the same prefix.
-
-Some packages pay attention to @samp{--with-@var{package}} options to
-@code{configure}, where @var{package} is something like @samp{gnu-as} or
-@samp{x} (for the X Window System). They may also pay attention to
-@samp{--enable-@var{feature}} options, where @var{feature} indicates an
-optional part of the package. The README should mention any
-@samp{--with-} and @samp{--enable-} options that the package recognizes.
-
-@code{configure} also recognizes the following options:
-
-@table @code
-@item --help
-Print a summary of the options to @code{configure}, and exit.
-
-@itemx --quiet
-@item --silent
-Do not print messages saying which checks are being made.
-
-@item --verbose
-Print the results of the checks.
-
-@item --version
-Print the version of Autoconf used to generate the @code{configure}
-script, and exit.
-
-@item --x-includes=@var{dir}
-X include files are in @var{dir}.
-
-@item --x-libraries=@var{dir}
-X library files are in @var{dir}.
-@end table
-
-@code{configure} also accepts and ignores some other options.
+Below are instructions on how to configure a package that uses a
+@code{configure} script, suitable for inclusion as an @file{INSTALL}
+file in the package.
@menu
-* Overriding variables:: Workarounds for unusual systems.
-* Invoking config.status:: Recreating a configuration.
+* Basic Installation:: Instructions for typical cases.
+* Compilers and Options:: Selecting compilers and optimization.
+* Build Directory:: Configuring in a different directory.
+* Installation Directories:: Installing in different directories.
+* System Type:: Specifying the system type.
+* Optional Features:: Selecting optional features.
@end menu
-@node Overriding variables, Invoking config.status, , Invoking configure
-@section Overriding variables
-
-On systems that require unusual options for compilation or linking that
-the package's @code{configure} script does not know about, you can give
-@code{configure} initial values for variables by setting them in the
-environment. In Bourne-compatible shells, you can do that on the
-command line like this:
-
-@example
-CC='gcc -traditional' LIBS=-lposix ./configure
-@end example
-
-@noindent
-On systems that have the @code{env} program, you can do it like this:
-
-@example
-env CC='gcc -traditional' LIBS=-lposix ./configure
-@end example
-
-Here are the @code{make} variables that you might want to override with
-environment variables when running @code{configure}.
-
-For these variables, any value given in the environment overrides the
-value that @code{configure} would choose:
-
-@defvar CC
-C compiler program. The default is @code{cc}.
-@end defvar
-
-@defvar INSTALL
-Program to use to install files. The default is @code{install} if you
-have it, @code{cp} otherwise.
-@end defvar
-
-For these variables, any value given in the environment is added to
-the value that @code{configure} chooses:
-
-@defvar DEFS
-Configuration options, in the form @samp{-Dfoo -Dbar@dots{}}. Do not
-use this variable in packages that create a configuration header file.
-@end defvar
-
-@defvar LIBS
-Libraries to link with, in the form @samp{-lfoo -lbar@dots{}}.
-@end defvar
-
-In the long term, most problems requiring manual intervention should be
-fixed by updating either the Autoconf macros or the @file{configure.in}
-file for that package. @xref{Making configure Scripts}, for a
-discussion of that subject.
+@include install.texi
-@node Invoking config.status, , Overriding variables, Invoking configure
-@section Recreating a Configuration
+@node Invoking config.status, Site Default Values, Invoking configure, Top
+@chapter Recreating a Configuration
The @code{configure} script creates a file named @file{config.status}
which describes which configuration options were specified when the
(If @file{configure.in} does not call @code{AC_CONFIG_HEADER}, there is
no need to set @code{CONFIG_HEADERS} in the @code{make} rules.)
-@node Example, Preprocessor Symbol Index, Invoking configure, Top
+@node Site Default Values, Example, Invoking config.status, Top
+@chapter Site Default Values
+
+Autoconf-generated @code{configure} scripts support site and system wide
+initialization files. You can create these files to provide default
+values for some configuration values, both on all of your systems and
+separately for each architecture.
+
+@code{configure} reads the shell script
+@file{@var{exec_prefix}/lib/config.site} if it exists, then
+@file{@var{prefix}/lib/config.site} if it exists. Thus, settings in
+system dependent files override those in system independent ones in case
+of conflict. @code{configure} reads any cache file after it has read
+any site files. This way, the site file can define a default cache
+file, to be shared between all Autoconf-generated @code{configure}
+scripts run on that system.
+
+Site files can be arbitrary shell scripts, but only certain kinds of
+code are really appropriate to be in them. Besides a cache file, they
+are good places to set default values for other shell variables like
+@code{CC}, if you need to give them unusual values: anything you would
+normally do, repetitively, on the command line. If you use non-default
+values for @var{prefix} or @var{exec_prefix}, you can't set them in the
+site file, since you have to specify them on the command line in order
+for @code{configure} to find the site file!
+
+In addition, it is possible to set some cache values in the site file.
+If you are cross-compiling, it is impossible to check features that
+require running a test program. You could ``prime the cache'' by
+setting those values correctly for that system in
+@file{@var{exec_prefix}/lib/config.site}. The cache file is careful to
+not override any variables set in the site files. Similarly, you should
+not override command-line options in the site files. Your code should
+check that variables such as @code{prefix} and @code{cache_file} have
+their default values (as set near the top of @code{configure}) before
+changing them.
+
+@node Example, Preprocessor Symbol Index, Site Default Values, Top
@chapter An Example
Here are sample @file{configure.in} and @file{Makefile.in} files, to
for func in `for x in $funcs; do echo $x; done | sort | uniq`; do
sym="`echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
echo "
-/* Define if you have ${func}. */
+/* Define if you have the ${func} function. */
#undef HAVE_${sym}"
done
for func in `for x in $funcs; do echo $x; done | sort | uniq`; do
sym="`echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
echo "
-/* Define if you have ${func}. */
+/* Define if you have the ${func} function. */
#undef HAVE_${sym}"
done
usage="\
Usage: autoreconf [--help] [--macrodir=dir] [--verbose] [--version]
[directory...]"
-verbose=
-show_version=
+verbose=no
+show_version=no
test -z "$AC_MACRODIR" && AC_MACRODIR=@datadir@
export AC_MACRODIR # Pass it down to autoconf and autoheader.
AC_MACRODIR="$1"
shift ;;
--verbose | --verbos | --verbo | --verb)
- verbose=t; shift ;;
+ verbose=yes; shift ;;
--version | --versio | --versi | --vers)
- show_version=t; shift ;;
+ show_version=yes; shift ;;
--) # Stop option processing.
shift; break ;;
-*) echo "$usage" 1>&2; exit 1 ;;
esac
done
-if test -n "$show_version"; then
+if test $show_version = yes; then
version=`sed -n 's/define.AC_ACVERSION.[ ]*\([0-9.]*\).*/\1/p' \
$AC_MACRODIR/acgeneral.m4`
echo "Autoconf version $version"
(
dir=`echo $confin|sed 's%/[^/][^/]*$%%'`
cd $dir || exit 1
- test -n "$verbose" && echo running autoconf in $dir
+ test $verbose = yes && echo running autoconf in $dir
autoconf
+ # FIXME maybe we should have an option to run shindent here.
if grep AC_CONFIG_HEADER configure.in > /dev/null; then
- test -n "$verbose" && echo running autoheader in $dir
+ test $verbose = yes && echo running autoheader in $dir
autoheader
fi
)
usage="\
Usage: autoreconf [--help] [--macrodir=dir] [--verbose] [--version]
[directory...]"
-verbose=
-show_version=
+verbose=no
+show_version=no
test -z "$AC_MACRODIR" && AC_MACRODIR=@datadir@
export AC_MACRODIR # Pass it down to autoconf and autoheader.
AC_MACRODIR="$1"
shift ;;
--verbose | --verbos | --verbo | --verb)
- verbose=t; shift ;;
+ verbose=yes; shift ;;
--version | --versio | --versi | --vers)
- show_version=t; shift ;;
+ show_version=yes; shift ;;
--) # Stop option processing.
shift; break ;;
-*) echo "$usage" 1>&2; exit 1 ;;
esac
done
-if test -n "$show_version"; then
+if test $show_version = yes; then
version=`sed -n 's/define.AC_ACVERSION.[ ]*\([0-9.]*\).*/\1/p' \
$AC_MACRODIR/acgeneral.m4`
echo "Autoconf version $version"
(
dir=`echo $confin|sed 's%/[^/][^/]*$%%'`
cd $dir || exit 1
- test -n "$verbose" && echo running autoconf in $dir
+ test $verbose = yes && echo running autoconf in $dir
autoconf
+ # FIXME maybe we should have an option to run shindent here.
if grep AC_CONFIG_HEADER configure.in > /dev/null; then
- test -n "$verbose" && echo running autoheader in $dir
+ test $verbose = yes && echo running autoheader in $dir
autoheader
fi
)
# Process any command line arguments.
sub parse_args
{
- local ($usage) = "Usage: $0 [--help] [--verbose] [--version] [srcdir]\n";
+ local ($usage) = \
+ "Usage: $0 [--macrodir=dir] [--help] [--verbose] [--version] [srcdir]\n";
foreach $_ (@ARGV) {
- if (/^--h/) {
+ if (/^--m[a-z]*=(.*)/) {
+ $datadir = $1;
+ } elsif (/^--h/) {
print "$usage";
exit 0;
} elsif (/^--verb/) {
# Process any command line arguments.
sub parse_args
{
- local ($usage) = "Usage: $0 [--help] [--verbose] [--version] [srcdir]\n";
+ local ($usage) = \
+ "Usage: $0 [--macrodir=dir] [--help] [--verbose] [--version] [srcdir]\n";
foreach $_ (@ARGV) {
- if (/^--h/) {
+ if (/^--m[a-z]*=(.*)/) {
+ $datadir = $1;
+ } elsif (/^--h/) {
print "$usage";
exit 0;
} elsif (/^--verb/) {
print_version=
while test $# -gt 0 ; do
- case "z${1}" in
- z-h | z--help | z--h* )
+ case "${1}" in
+ -h | --help | --h* )
echo "${usage}" 1>&2; exit 0 ;;
- z--macrodir=* | z--m*=* )
+ --macrodir=* | --m*=* )
AC_MACRODIR="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
shift ;;
- z-m | z--macrodir | z--m* )
+ -m | --macrodir | --m* )
shift
test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
AC_MACRODIR="${1}"
shift ;;
- z-v | z--version | z--v* )
+ -v | --version | --v* )
print_version="-DAC_PRINT_VERSION"
- infile=/dev/null tmpout=/dev/null
+ infile=/dev/null
shift ;;
- z-- ) # Stop option processing
+ -- ) # Stop option processing
shift; break ;;
- z- ) # Use stdin as input.
+ - ) # Use stdin as input.
break ;;
- z-* )
+ -* )
echo "${usage}" 1>&2; exit 1 ;;
* )
break ;;
tmpin=/tmp/acin.$$
infile=$tmpin
cat > $infile
- elif test ! -s "${infile}"; then
+ elif test ! -r "${infile}"; then
echo "autoconf: ${infile}: No such file or directory" >&2
exit 1
fi
$M4 $MACROFILES $infile > $tmpout || { st=$?; rm -f $tmpin $tmpout; exit $st; }
-test -n "$print_version" && exit 0
+if test -n "$print_version"; then
+ cat $tmpout
+ rm -f $tmpout
+ exit 0
+fi
# You could add your own prefixes to pattern if you wanted to check for
# them too, e.g. pattern="AC_\|ILT_", except that UNIX sed doesn't do
for func in `for x in $funcs; do echo $x; done | sort | uniq`; do
sym="`echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
echo "
-/* Define if you have ${func}. */
+/* Define if you have the ${func} function. */
#undef HAVE_${sym}"
done
usage="\
Usage: autoreconf [--help] [--macrodir=dir] [--verbose] [--version]
[directory...]"
-verbose=
-show_version=
+verbose=no
+show_version=no
test -z "$AC_MACRODIR" && AC_MACRODIR=@datadir@
export AC_MACRODIR # Pass it down to autoconf and autoheader.
AC_MACRODIR="$1"
shift ;;
--verbose | --verbos | --verbo | --verb)
- verbose=t; shift ;;
+ verbose=yes; shift ;;
--version | --versio | --versi | --vers)
- show_version=t; shift ;;
+ show_version=yes; shift ;;
--) # Stop option processing.
shift; break ;;
-*) echo "$usage" 1>&2; exit 1 ;;
esac
done
-if test -n "$show_version"; then
+if test $show_version = yes; then
version=`sed -n 's/define.AC_ACVERSION.[ ]*\([0-9.]*\).*/\1/p' \
$AC_MACRODIR/acgeneral.m4`
echo "Autoconf version $version"
(
dir=`echo $confin|sed 's%/[^/][^/]*$%%'`
cd $dir || exit 1
- test -n "$verbose" && echo running autoconf in $dir
+ test $verbose = yes && echo running autoconf in $dir
autoconf
+ # FIXME maybe we should have an option to run shindent here.
if grep AC_CONFIG_HEADER configure.in > /dev/null; then
- test -n "$verbose" && echo running autoheader in $dir
+ test $verbose = yes && echo running autoheader in $dir
autoheader
fi
)
# Process any command line arguments.
sub parse_args
{
- local ($usage) = "Usage: $0 [--help] [--verbose] [--version] [srcdir]\n";
+ local ($usage) = \
+ "Usage: $0 [--macrodir=dir] [--help] [--verbose] [--version] [srcdir]\n";
foreach $_ (@ARGV) {
- if (/^--h/) {
+ if (/^--m[a-z]*=(.*)/) {
+ $datadir = $1;
+ } elsif (/^--h/) {
print "$usage";
exit 0;
} elsif (/^--verb/) {
AC_VERBOSE(autoscan will not be built since perl is not found)
fi
+AC_PROGRAM_CHECK(BASH, bash, no-bash)
+if test "$BASH" != no-bash; then
+ PROGS="$PROGS shindent"
+else
+ AC_VERBOSE(shindent will not be built since bash is not found)
+fi
+
AC_PROG_INSTALL
# Work with the GNU or Cygnus source tree layout.
if test -f $srcdir/standards.texi; then
standards_info=standards.info standards_dvi=standards.dvi
fi
-AC_SUBST(standards_info)AC_SUBST(standards_dvi)dnl
+AC_SUBST(standards_info)dnl
+AC_SUBST(standards_dvi)dnl
-AC_OUTPUT(Makefile)
+AC_OUTPUT(Makefile testsuite/Makefile)
TEXI2DVI = texi2dvi
M4 = @M4@
-PROGS = autoconf autoheader autoreconf @PROGS@
+PROGS = autoconf autoheader autoreconf ifnames @PROGS@
# Path of the perl interpreter.
PERL = @PERL@
DISTFILES = COPYING ChangeLog INSTALL Makefile.in NEWS README \
acconfig.h acfunctions acgeneral.m4 acheaders acidentifiers \
acmakevars acprograms acspecific.m4 autoconf.info* \
- autoconf.sh autoconf.texi autoheader.sh autoreconf.sh autoscan.pl \
+ autoconf.sh autoconf.texi install.texi \
+ autoheader.sh autoreconf.sh autoscan.pl shindent.sh ifnames.sh \
config.guess config.sub configure configure.in \
install.sh mkinstalldirs texinfo.tex \
+ testsuite/Makefile.in testsuite/config/*.exp \
+ testsuite/lib/*.exp \
+ testsuite/autoconf.0/*.exp \
standards.texi make-stds.texi standards.info*
editsh = sed -e 's,@''datadir''@,$(acdatadir),g' -e 's,@''M4''@,$(M4),g'
rm -f $@ $@.tmp
$(editsh) $(srcdir)/autoreconf.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+shindent: shindent.sh
+ rm -f $@ $@.tmp
+ $(editsh) $(srcdir)/shindent.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+
+ifnames: ifnames.sh
+ rm -f $@ $@.tmp
+ $(editsh) $(srcdir)/ifnames.sh > $@.tmp && mv $@.tmp $@ && chmod +x $@
+
autoscan: autoscan.pl
rm -f $@ $@.tmp
$(editpl) $(srcdir)/autoscan.pl > $@.tmp && mv $@.tmp $@ && chmod +x $@
-info: autoconf.info @standards_info@
+info: autoconf.info @standards_info@ INSTALL
-autoconf.info: autoconf.texi
+autoconf.info: autoconf.texi install.texi
$(MAKEINFO) -I$(srcdir) $(srcdir)/autoconf.texi --output=$@
+INSTALL: install.texi
+ $(MAKEINFO) -I$(srcdir) $(srcdir)/install.texi --output=$@ \
+ --no-headers --no-validate
+
standards.info: standards.texi make-stds.texi
$(MAKEINFO) -I$(srcdir) $(srcdir)/standards.texi --output=$@
standards.dvi: standards.texi make-stds.texi
$(TEXI2DVI) $(srcdir)/standards.texi
-check:
-installcheck:
+check: all
+ rootme=`pwd`; cd testsuite && ${MAKE} $@ AUTOCONF=$$rootme/autoconf \
+ AUTOCONFFLAGS="-m $$rootme"
+installcheck: all install
+ cd testsuite && ${MAKE} AUTOCONF=${bindir}/autoconf $@
installdirs:
$(SHELL) ${srcdir}/mkinstalldirs $(bindir) $(infodir) $(acdatadir)
$(INSTALL_PROGRAM) autoconf $(bindir)/autoconf
$(INSTALL_PROGRAM) autoheader $(bindir)/autoheader
$(INSTALL_PROGRAM) autoreconf $(bindir)/autoreconf
+ $(INSTALL_PROGRAM) ifnames $(bindir)/ifnames
$(INSTALL_DATA) $(srcdir)/acgeneral.m4 $(acdatadir)/acgeneral.m4
$(INSTALL_DATA) $(srcdir)/acspecific.m4 $(acdatadir)/acspecific.m4
$(INSTALL_DATA) $(srcdir)/acconfig.h $(acdatadir)/acconfig.h
-if test -f autoscan; then \
$(INSTALL_PROGRAM) autoscan $(bindir)/autoscan; \
+ -if test -f shindent; then \
+ $(INSTALL_PROGRAM) shindent $(bindir)/shindent; \
$(INSTALL_DATA) $(srcdir)/acfunctions $(acdatadir)/acfunctions; \
$(INSTALL_DATA) $(srcdir)/acheaders $(acdatadir)/acheaders; \
$(INSTALL_DATA) $(srcdir)/acidentifiers $(acdatadir)/acidentifiers; \
uninstall:
rm -f $(bindir)/autoconf $(bindir)/autoheader $(bindir)/autoscan
- rm -f $(bindir)/autoreconf
+ rm -f $(bindir)/autoreconf $(bindir)/shindent $(bindir)/ifnames
rm -fr $(acdatadir)
cd $(infodir); rm -f autoconf.info*
if test -f standards.info || test -f $(srcdir)/standards.info; \
./config.status --recheck
clean:
- rm -f autoconf autoheader autoscan autoreconf *.tmp
+ rm -f autoconf autoheader autoscan autoreconf shindent ifnames *.tmp
rm -f *.aux *.cp *.cps *.dvi *.fn *.fns *.ky *.kys *.log
rm -f *.pg *.pgs *.toc *.tp *.tps *.vr *.vrs *.ma *.mas
rm -f Makefile config.status config.cache config.log
realclean: distclean
- rm -f TAGS *.info*
+ rm -f TAGS *.info* INSTALL
TAGS:
etags ${srcdir}/*.m4 ${srcdir}/*.sh ${srcdir}/[a-z]*.in ${srcdir}/*.texi
distname=`sed -e '/define(AC_ACVERSION,/!d' \
-e 's/[^0-9.]*\([0-9.]*\).*/autoconf-\1/' -e q acgeneral.m4`; \
rm -fr $$distname; \
- mkdir $$distname; \
+ mkdir $$distname $$distname/testsuite $$distname/testsuite/config; \
+ mkdir $$distname/testsuite/lib $$distname/testsuite/autoconf.0; \
for file in $(DISTFILES); do \
- ln $$file $$distname \
- || { echo copying $$file instead; cp -p $$file $$distname;}; \
+ ln $$file $$distname/$$file \
+ || { echo copying $$file instead; cp -p $$file $$distname/$$file;}; \
done; \
chmod -R a+rX $$distname; \
tar -chz -f $$distname.tar.gz $$distname; \
@c @setchapternewpage odd
@c %**end of header
-@set EDITION 1.93
-@set VERSION 1.93
+@set EDITION 1.94
+@set VERSION 1.94
@set UPDATED June 1994
@iftex
* Making configure Scripts:: How to organize and produce Autoconf scripts.
* Specific Tests:: Macros that check for particular features.
* General Purpose Macros:: Macros that check for kinds of features.
+* Manual Configuration:: Selecting features that can't be guessed.
* Writing Macros:: How to add your own macros to Autoconf.
+* Caching Values:: Speeding up subsequent @code{configure} runs.
* Makefiles:: Information Autoconf uses in @file{Makefile}s.
* Invoking configure:: How to use the Autoconf output.
+* Invoking config.status:: Recreating a configuration.
+* Site Default Values:: Providing local defaults for @code{configure}.
* Example:: Sample Autoconf input files.
* Preprocessor Symbol Index:: Index of C preprocessor symbols defined.
* Macro Index:: Index of Autoconf macros.
* Writing configure.in:: What to put in an Autoconf input file.
* Invoking autoconf:: How to create configuration scripts.
* Invoking autoheader:: How to create configuration header files.
+* Invoking autoscan:: Semi-automatic @file{configure.in} writing.
+* Invoking ifnames:: Listing the conditionals in source code.
+* Invoking autoreconf:: Remaking multiple @code{configure} scripts.
+* Invoking shindent:: Making @code{configure} scripts more readable.
Specific Tests
Running @code{configure} Scripts
-* Overriding variables:: Workarounds for unusual systems.
-* Invoking config.status:: Recreating a configuration.
+* Basic Installation:: Instructions for typical cases.
+* Build Directory:: Configuring in a different directory.
+* Installation Directories:: Installing in different directories.
+* System Type:: Specifying the system type.
+* Optional Features:: Selecting optional features.
+* Compilers and Options:: Selecting compilers and optimization.
An Example
* Writing configure.in:: What to put in an Autoconf input file.
* Invoking autoconf:: How to create configuration scripts.
* Invoking autoheader:: How to create configuration header files.
+* Invoking autoscan:: Semi-automatic @file{configure.in} writing.
+* Invoking ifnames:: Listing the conditionals in source code.
+* Invoking autoreconf:: Remaking multiple @code{configure} scripts.
+* Invoking shindent:: Making @code{configure} scripts more readable.
@end menu
@node Writing configure.in, Invoking autoconf, , Making configure Scripts
the Autoconf version number and exits, and @code{--help}, which prints a
summary of the command-line options and exits.
-@node Invoking autoheader, , Invoking autoconf, Making configure Scripts
+@node Invoking autoheader, Invoking autoscan, Invoking autoconf, Making configure Scripts
@section Invoking @code{autoheader}
You can use the @code{autoheader} program to create a template file of C
the Autoconf version number and exits, and @code{--help}, which prints a
summary of the command-line options and exits.
+@node Invoking autoscan, Invoking ifnames, Invoking autoheader, Making configure Scripts
+@section Invoking autoscan
+
+The @code{autoscan} program can help you create a @file{configure.in}
+file for a software package. @code{autoscan} examines source files in
+the directory given as a command line argument, or the current directory
+if none is given. It searches the source files for common portability
+problems and creates a file @file{configure.scan} which is a preliminary
+@file{configure.in} for that package. You should manually examine
+@file{configure.scan} before renaming it to @file{configure.in}; it will
+probably need some adjustments. If you want the package to use a
+configuration header file, you will have to add a call to
+@code{AC_CONFIG_HEADER}. You might have to change or add some
+@code{#if} directives in order to make the package work with Autoconf
+(@pxref{Invoking ifnames}, for information about a program that might
+help with that job).
+
+@code{autoscan} uses several data files, which are installed with the
+distributed Autoconf macro files, to determine which macros to output
+when it finds particular symbols in a package's source files. These
+files all have the same format. Each line consists of a symbol,
+whitespace, and the Autoconf macro to output if that symbol is
+encountered. Lines starting with @samp{#} are comments.
+
+@code{autoscan} is only installed if you already have Perl installed.
+
+@code{autoscan} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the data files in directory @var{dir} instead of the default
+installation directory.
+
+@item --verbose
+Print the names of the files it examines and the potentially interesting
+symbols it finds in them. This output can be voluminous.
+
+@item --version
+Print the version number of @code{autoscan} and exit.
+@end table
+
+@node Invoking ifnames, Invoking autoreconf, Invoking autoscan, Making configure Scripts
+@section Invoking ifnames
+
+@code{ifnames} can help when writing a @file{configure.in} for a
+software package. It prints the identifiers used in C preprocessor
+conditionals. If a package has already been set up to have some
+portability, this program can help you figure out what its
+@code{configure} needs to check for. It may fill in some gaps in a
+@file{configure.in} generated by @code{autoscan} (@pxref{Invoking autoscan}).
+
+@code{ifnames} scans all of the C source files named on the command line
+(or the standard input, if none are given) and writes to the standard
+output a sorted list of all the identifiers that appear in those files
+in @code{#if}, @code{#elif}, or @code{#ifdef} directives. It prints
+each identifier on a line, followed by a space-separated list of the
+files in which that identifier occurs.
+
+@noindent
+@code{ifnames} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory. Only used to get the version number.
+
+@item --version
+Print the version number of @code{ifnames} and exit.
+@end table
+
+@node Invoking autoreconf, Invoking shindent, Invoking ifnames, Making configure Scripts
+@section Invoking autoreconf
+
+If you have a lot of Autoconf-generated @code{configure} scripts and you
+get a new version of Autoconf, the @code{autoreconf} program can be
+handy. It runs @code{autoconf} (and @code{autoheader}, where
+appropriate) repeatedly to remake all of the Autoconf @code{configure}
+scripts in a directory tree.
+
+@noindent
+@code{autoreconf} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory.
+
+@item --verbose
+Print the name of each directory where @code{autoreconf} runs
+@code{autoconf} (and @code{autoheader}, if that directory's
+@file{configure.in} calls @code{AC_CONFIG_HEADER}).
+
+@item --version
+Print the version number of @code{autoreconf} and exit.
+@end table
+
+@node Invoking shindent, , Invoking autoreconf, Making configure Scripts
+@section Invoking shindent
+
+Autoconf-generated @code{configure} scripts can be somewhat hard to
+read, because they @emph{look} machine-generated---mainly because they
+do not use whitespace rationally. Unfortunately, it is impossible to do
+proper indentation using a macro processor like @code{m4}. However, if
+you have GNU @code{bash} installed, you can use the @code{shindent}
+program, which uses @code{bash} to give a Bourne shell script readable
+indentation.
+
+@code{shindent} indents each script named on the command line, backing
+up the original version using the original file name with @samp{~} appended.
+@code{shindent} places some restrictions on its input, due to the way it
+uses @code{bash} to do the indentation:
+
+@itemize @bullet
+@item
+It removes comments and blank lines between cases case statements.
+
+@item
+Doing odd things in case statements might cause odd problems.
+
+@item
+The script must not define any shell functions.
+
+@item
+If any string literals or here-documents contain lines that start
+with four spaces, those spaces will be removed.
+
+@item
+The script must not be @code{shindent} itself.
+@end itemize
+
+@noindent
+@code{shindent} accepts the following options:
+
+@table @code
+@item --help
+Print a summary of the command line options and exit.
+
+@item --macrodir=@var{dir}
+Look for the Autoconf macro files in directory @var{dir} instead of the
+default installation directory. Only used to get the version number.
+
+@item --version
+Print the version number of @code{shindent} and exit.
+@end table
+
@node Specific Tests, General Purpose Macros, Making configure Scripts, Top
@chapter Specific Tests
@defmac AC_LN_S
@maindex LN_S
-If @samp{ln -s} works on the current filesystem (the O.S. and filesystem
-support symbolic links), set shell and @code{make} variable @code{LN_S}
-to @samp{ln -s}, otherwise set it to @samp{ln}.
+If @samp{ln -s} works on the current filesystem (the operating system
+and filesystem support symbolic links), set shell and @code{make}
+variable @code{LN_S} to @samp{ln -s}, otherwise set it to @samp{ln}.
@end defmac
@defmac AC_MINUS_C_MINUS_O
@defmac AC_RSH
@maindex RSH
+@vindex RSH
@vindex NO_REMOTE
@vindex HAVE_NETDB_H
-If a remote shell is available, put @samp{rtapelib.o} in @code{make}
-variable @code{RTAPELIB}. Otherwise, also do so if @file{netdb.h}
-exists (implying the @code{rexec} function), and in addition define
-@code{HAVE_NETDB_H}. If neither a remote shell nor @code{rexec} is
-available, define @code{NO_REMOTE}.
+If a remote shell is available, set @code{make} variable @code{RSH} to
+its pathname. Otherwise, if @file{netdb.h} exists (implying the
+@code{rexec} function), define @code{HAVE_NETDB_H}. If either is true,
+also put @samp{rtapelib.o} in @code{make} variable @code{RTAPELIB}.
+Otherwise, define @code{NO_REMOTE}.
@end defmac
@defmac AC_SET_MAKE
#if !STDC_HEADERS && HAVE_MEMORY_H
#include <memory.h>
#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
-#define index strchr
-#define rindex strrchr
-#define bcopy(s, d, n) memcpy ((d), (s), (n))
-#define bcmp(s1, s2, n) memcmp ((s1), (s2), (n))
-#define bzero(s, n) memset ((s), 0, (n))
#else /* not STDC_HEADERS and not HAVE_STRING_H */
#include <strings.h>
/* memory.h and strings.h conflict on some systems. */
+#ifndef strchr
+#define strchr index
+#endif
+#ifndef strrchr
+#define strrchr rindex
+#endif
+#ifndef memcpy
+#define memcpy(d, s, n) bcopy ((s), (d), (n))
+#endif
+#ifndef memcmp
+#define memcmp(s1, s2, n) bcmp ((s1), (s2), (n))
+#endif
#endif /* not STDC_HEADERS and not HAVE_STRING_H */
@end group
@end example
@noindent
-This example asssumes that your code uses the BSD style functions. If
-you use the System V/ANSI C style functions, you will need to replace
-the macro definitions with ones that go in the other direction.
+This example asssumes that your code uses the ANSI C/System V style
+functions. If you use the BSD style functions, replace the macro
+definitions with ones that go in the other direction. (Or, better,
+modernize your code.)
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
on which language is current, @pxref{Language Choice}), if it hasn't
@maindex CROSS_CHECK
If the C compiler being used does not produce executables that can run
on the system where @code{configure} is being run, set the shell
-variable @code{cross_compiling} to 1. This information can be used by
-@code{AC_TEST_RUN} to determine whether to take a default action
-instead of trying to run a test program (@pxref{C Features}).
+variable @code{cross_compiling} to @samp{yes}, otherwise @samp{no}.
+This information can be used by @code{AC_TEST_RUN} to determine whether
+to take a default action instead of trying to run a test program
+(@pxref{C Features}).
@end defmac
@defmac AC_CHAR_UNSIGNED
The following macros check for certain operating systems that need
special treatment for some programs, due to exceptional oddities in
-their header files or libraries:
+their header files or libraries. These macros are kludges; they should
+be replaced someday with a more systematic approach, based either on the
+functions they make available or the environments they provide.
@defmac AC_AIX
@maindex AIX
@code{AC_DIR_HEADER}.
@end defmac
-@node General Purpose Macros, Writing Macros, Specific Tests, Top
+@node General Purpose Macros, Manual Configuration, Specific Tests, Top
@chapter General Purpose Macros
These macros provide ways for other macros to control the kind of output
@defmac AC_CONFIG_SUBDIRS (@var{dir} @dots{})
@maindex CONFIG_SUBDIRS
Run @code{configure} in each subdirectory @var{dir} in the given
-whitespace-separated list If a given @var{dir} is not found, no error is
-reported, so a @code{configure} script can configure whichever parts of
-a large source tree are present. If a given @var{dir} contains
+whitespace-separated list. If a given @var{dir} is not found, no error
+is reported, so a @code{configure} script can configure whichever parts
+of a large source tree are present. If a given @var{dir} contains
@file{configure.in} but no @file{configure}, the Cygnus @code{configure}
-script found by @code{AC_CONFIG_AUXDIR} is used.
-
-The subdirectory @code{configure} scripts are given the same command
-line options that were given to this @code{configure} script, with minor
-changes if needed (e.g., to adjust a relative path for the cache file).
+script found by @code{AC_CONFIG_AUXDIR} is used. The subdirectory
+@code{configure} scripts are given the same command line options that
+were given to this @code{configure} script, with minor changes if needed
+(e.g., to adjust a relative path for the cache file or source
+directory). This macro also sets the shell and @code{make} variable
+@code{subdirs} to the list of directories @samp{@var{dir} @dots{}}.
+@file{Makefile} rules can use this variable to determine which
+subdirectories to recurse into.
@end defmac
@defmac AC_INIT (@var{unique-file-in-source-dir})
These macros check whether particular files exist.
-@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]]})
+@defmac AC_HAVE_LIBRARY (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
@maindex HAVE_LIBRARY
Create a test C program to see whether that program can be linked with
-the specified library. @var{action-if-found} is a list of shell
+the library @var{library}. @var{action-if-found} is a list of shell
commands to run if the link succeeds (which means that the library is
present); @var{action-if-not-found} is a list of shell commands to run
if the link fails. If @var{action-if-found} and
for library @samp{foo}. @var{library} can be written as any of
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
the compiler is passed @samp{-lfoo}.
+
+If linking with @var{library} results in unresolved symbols, which would
+be resolved by linking with additional libraries, give those libraries
+as the @var{other-libraries} argument, separated by spaces: @samp{-lX11
+-lXt}. Otherwise this macro will fail to detect that @var{library} is
+present, because linking the test program will always fail with
+unresolved symbols.
@end defmac
@defmac AC_PREFIX (@var{program})
These macros check for features of the C compiler, libraries, and headers.
+@defmac AC_CHECK_TYPE (@var{type}, @var{default})
+@maindex CHECK_TYPE
+If the type @var{type} is not defined in @file{sys/types.h}, define it
+to be the C (or C++) builtin type @var{default}, e.g. @samp{short} or
+@samp{unsigned}.
+@end defmac
+
@defmac AC_COMPILE_CHECK (@var{echo-text}, @var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
@maindex COMPILE_CHECK
This is an obsolete alias for @code{AC_TEST_LINK}, with the addition that it
@end example
@end defmac
-@ignore
@defmac AC_SUBST_FILE (@var{variable}, @var{file})
@maindex SUBST_FILE
Substitute the contents of the file @file{@var{srcdir}/@var{file}} into
inserting @file{Makefile} fragments for particular host or tartet types
into @file{Makefile}s.
@end defmac
-@end ignore
@node Printing Messages, Language Choice, Setting Variables, General Purpose Macros
@section Printing Messages
@xref{Dependencies Between Macros}, for more information.
@end defmac
-@node Writing Macros, Makefiles, General Purpose Macros, Top
+@node Manual Configuration, Writing Macros, General Purpose Macros, Top
+@chapter Manual Configuration
+
+Some kinds of features can't be guessed automatically by running test
+programs. For example, how to allocate a pty, or the details of the
+object file format, or special options that need to be passed to the
+compiler or linker to provide a POSIX or ANSI C environment. It is
+possible to check for such features using ad-hoc means, such as having
+@code{configure} check the output of the @code{uname} program, or
+looking for libraries that are unique to particular systems. However,
+Autoconf provides a uniform method for handling unguessable features.
+
+Like other GNU @code{configure} scripts, Autoconf-generated
+@code{configure} scripts can make decisions based on a canonical name
+for the system type, which has the form:
+
+@example
+@var{cpu}-@var{company}-@var{system}
+@end example
+
+@code{configure} can usually guess the canonical name for the type of
+system it's running on. To do so it runs a script called
+@code{config.guess}, which derives the name using the @code{uname}
+command or symbols predefined by the C preprocessor.
+
+Alternately, the user can specify the system type with command line
+arguments to @code{configure}. Doing so is necessary when
+cross-compiling. In the most complex case of cross-compiling, three
+system types are involved. The options to specify them are:
+
+@table @code
+@item --build=@var{build-type}
+the type of system on which the package is being configured and
+compiled;
+
+@item --host=@var{host-type}
+the type of system on which the package will run;
+
+@item --target=@var{target-type}
+the type of system for which any compiler tools in the package will
+produce code.
+@end table
+
+@noindent
+If the user gives @code{configure} a non-option argument, it is used as
+the default for the host, target, and build system types if the user
+does not specify them explicitly with options. The target and build
+types default to the host type if it is given and they are not. Note
+that if you are cross-compiling, you still have to specify the names of
+the cross-tools you use, in particular the C compiler, on the
+@code{configure} and @code{make} command lines, e.g.,
+
+@example
+CC=m68k-coff-gcc configure --target=m68k-coff; CC=m68k-coff-gcc make
+@end example
+
+@code{configure} recognizes short aliases for many system types; for
+example, @samp{decstation} can be given on the command line instead of
+@samp{mips-dec-ultrix4.2}. @code{configure} runs a script called
+@code{config.sub} to canonicalize system type aliases.
+
+@defmac AC_CANONICAL_SYSTEM
+@maindex CANONICAL_SYSTEM
+Set shell and @code{make} variables to the names of the canonical system
+types. If the user did not specify one or more of those values on the
+command line, run @code{config.guess} to determine them. Run
+@code{config.sub} to canonicalize any aliases the user gave. If you use
+this macro, you must distribute those two shell scripts along with your
+source code (@pxref{Setup}, for information about the
+@code{AC_CONFIG_AUX_DIR} macro which you can use to control which
+directory @code{configure} looks for those scripts in). If you do not
+run this macro, @code{configure} ignores any @samp{--host}, etc. options
+given to it. The variables set are:
+
+@table @code
+@item @code{build}, @code{host}, @code{target}
+the canonical system names;
+
+@item @code{build_alias}, @code{host_alias}, @code{target_alias}
+the names the user specified, or the canonical names if
+@code{config.guess} was used;
+
+@item @code{build_cpu}, @code{build_vendor}, @code{build_os}
+@itemx @code{host_cpu}, @code{host_vendor}, @code{host_os}
+@itemx @code{target_cpu}, @code{target_vendor}, @code{target_os}
+the individual parts of the canonical names (for convenience).
+@end table
+@end defmac
+
+How do you use a canonical system type? Usually, you use it in one or
+more @code{case} statements in @file{configure.in} to select
+system-specific C files. Then link those files, which have names based
+on the system name, to generic names, such as @file{host.h} or
+@file{target.c}. The @code{case} statement patterns can use shell
+wildcards to group several cases together, like in this fragment:
+
+@example
+case "$target" in
+i386-*-mach* | i386-*-gnu*) obj_format=aout emulation=mach bfd_gas=yes ;;
+i960-*-bout) obj_format=bout ;;
+esac
+@end example
+
+@defmac AC_LINK_FILES (@var{link} @dots{}, @var{file} @dots{})
+@maindex LINK_FILES
+Link each of the existing files @var{file} to the corresponding link
+name @var{link}. Makes a symbolic link if possible, otherwise a hard
+link. For example, this call:
+
+@example
+AC_LINK_FILES(config/sun3.h config/aout.h, host.h object.h)
+@end example
+
+@noindent
+creates in the current directory @file{host.h}, which is a link to
+@file{@var{srcdir}/config/sun3.h}, and @file{object.h}, which is a link
+to @file{@var{srcdir}/config/aout.h}.
+@end defmac
+
+@node Writing Macros, Caching Values, Manual Configuration, Top
@chapter Writing Macros
If your package needs to test for some feature that none of the macros
prevent unwanted expansions of macros or @code{m4} builtins, such as
@samp{define} and @samp{$1}. Quotes are also required around macro
arguments that contain commas, since commas separate the arguments from
-each other.
+each other. It's a good idea to quote any macro arguments that contain
+newlines or calls to other macros, as well.
Autoconf (in @file{acgeneral.m4}) changes the @code{m4} quote characters
from the default @samp{`} and @samp{'} to @samp{[} and @samp{]}, because
@end group
@end example
-@node Makefiles, Invoking configure, Writing Macros, Top
+@node Caching Values, Makefiles, Writing Macros, Top
+@chapter Caching Values
+
+To avoid checking for the same features repeatedly in various
+@code{configure} scripts (or repeated runs of one script),
+@code{configure} saves the results of many of its checks in a @dfn{cache
+file}. If, when a @code{configure} script runs, it finds a cache file,
+it reads from it the results from previous runs and avoids rerunning
+those checks. As a result, @code{configure} can run much faster than if
+it had to perform all of the checks every time.
+
+The cache file is a shell script that caches the results of configure
+tests run on one system so they can be shared between configure scripts
+and configure runs. It is not useful on other systems. If its contents
+are invalid for some reason, the user may delete or edit it.
+
+By default, configure uses @file{./config.cache} as the cache file,
+creating it if it does not exist already. @code{configure} accepts the
+@samp{--cache-file=@var{file}} option to use a different cache file;
+that is what @code{configure} does when it calls @code{configure}
+scripts in subdirectories, so they share the cache. @xref{Setup}, for
+information on configuring subdirectories with the
+@code{AC_CONFIG_SUBDIRS} macro. @file{config.status} only pays
+attention to the cache file if it is given the @samp{--recheck} option,
+which makes it rerun @code{configure}.
+
+It is wrong to try to distribute cache files for particular system types.
+There is too much room for error in doing that, and too much
+administrative overhead in maintaining them. For any features that
+can't be guessed automatically, use the standard method of the canonical
+system type and linking files (@pxref{Manual Configuration}).
+
+The cache file on a particular system will gradually accumulate whenever
+someone runs a @code{configure} script; it will be initially
+nonexistent. Running @code{configure} merges the new cache results with
+the existing cache file. The site initialization script can specify a
+site-wide cache file to use instead of the default, to make it work
+transparently (@pxref{Site Default Values}).
+
+@defmac AC_CACHE_VAL (@var{cache-id}, @var{commands-to-set-it})
+@maindex CACHE_VAL
+Ensure that the results of the check identified by @var{cache-id} are
+available. If the results of the check were in the cache file that was
+read, print a verbose message saying so; otherwise, run the shell
+commands @var{commands-to-set-it}. Those commands should have no side
+effects except for setting the variable @var{cache-id}. In particular,
+they should not call @code{AC_DEFINE}; the code that follows the call to
+@code{AC_CACHE_VAL} should do that, based on the cached value. Also,
+they should not print any messages, for example with @code{AC_CHECKING};
+do that before calling @code{AC_CACHE_VAL}, so the messages are printed
+regardless of whether the results of the check are retrieved from the
+cache or determined by running the shell commands. If the shell
+commands are run to determine the value, the value will be saved in the
+cache file just before @code{configure} creates its output files.
+
+@noindent
+The names of cache variables should have this format:
+
+@example
+@var{package-prefix}_cv_@var{value-type}_@var{specific-value}@r{[}_@var{additional-options}@r{]}
+@end example
+
+@noindent
+for example, @samp{ac_cv_header_stat_broken} or
+@samp{ac_cv_prog_gcc_traditional}. The parts of the variable name are:
+
+@table @asis
+@item @var{package-prefix}
+An abbreviation for your package or organization; the same prefix you
+begin local Autoconf macros with, except lowercase by convention.
+For cache values used by the distributed Autoconf macros, this value is
+@samp{ac}.
+
+@item @code{_cv_}
+Indicates that this shell variable is a cache value.
+
+@item @var{value-type}
+A convention for classifying cache values, to produce a rational naming
+system. The values used in Autoconf are for the following classes of
+features; use them where applicable, otherwise invent your own categories:
+
+@table @code
+@item c
+C language
+
+@item func
+C functions
+
+@item group
+Unix groups
+
+@item header
+C header files
+
+@item lib
+C libraries
+
+@item path
+the absolute path names of programs
+
+@item prog
+the base names of programs
+
+@item struct
+C structures
+
+@item sys
+operating systems
+
+@item type
+C types
+
+@item var
+C variables in libraries
+
+@item x
+X Window System
+@end table
+
+@item @var{specific-value}
+Which member of the class of cache values this test applies to.
+For example, which function (@samp{alloca}), program (@samp{gcc}), or
+@code{make} variable (@samp{INSTALL}).
+
+@item @var{additional-options}
+Any particular behavior of the specific member that this test applies to.
+For example, @samp{broken} or @samp{set}. This part of the name may
+be omitted if it does not apply.
+@end table
+
+Like their names, the values the may be assigned to cache variables have
+a few restrictions. The values may not contain single quotes or curly braces.
+Usually, their values will be boolean (@samp{yes} or @samp{no}) or the
+names of files or functions; so this is not an important restriction.
+@end defmac
+
+@node Makefiles, Invoking configure, Caching Values, Top
@chapter Makefiles
Each subdirectory in a distribution should come with a file
touch $@{srcdir@}/stamp-h.in
# config.status might not change config.h
+# Don't rerun config.status if we just configured.
config.h: stamp-h
stamp-h: config.h.in config.status
- ./config.status
+ test ! -f stamp-h || ./config.status
touch stamp-h
Makefile: Makefile.in config.status
@xref{Invoking config.status}, for more information on handling
configuration-related dependencies.
-@node Invoking configure, Example, Makefiles, Top
+@node Invoking configure, Invoking config.status, Makefiles, Top
@chapter Running @code{configure} Scripts
A software package that uses a @code{configure} script
should be distributed with a file @file{Makefile.in}, but no
@file{Makefile}; that way, the user has to properly configure the
package for the local system before compiling it.
-Here is how to configure a package that uses a @code{configure} script.
-
-Normally, you just @code{cd} to the directory containing the package's
-source code and type @samp{./configure}. If you're using @code{csh} on
-an old version of System V, you might need to type @samp{sh configure}
-instead to prevent @code{csh} from trying to execute @code{configure}
-itself.
-
-Running @code{configure} takes awhile. While it is running, it
-prints some messages that tell what it is doing. If you don't want to
-see any messages, run @code{configure} with its standard output
-redirected to @file{/dev/null}; for example, @samp{./configure >/dev/null}.
-
-To compile the package in a different directory from the one containing
-the source code, you must use a version of @code{make} that supports the
-@code{VPATH} variable, such as GNU @code{make}. @code{cd} to the
-directory where you want the object files and executables to go and run
-the @code{configure} script. @code{configure} automatically checks for
-the source code in the directory that @code{configure} is in and in
-@file{..}. If for some reason @code{configure} is not in the source
-code directory that you are configuring, then it will report that it
-can't find the source code. In that case, run @code{configure} with the
-option @samp{--srcdir=@var{dir}}, where @var{dir} is the directory that
-contains the source code.
-
-By default, @samp{make install} will install the package's files in
-@file{/usr/local/bin}, @file{/usr/local/man}, etc. You can specify an
-installation prefix other than @file{/usr/local} by giving
-@code{configure} the option @samp{--prefix=@var{path}}. Alternately,
-you can do so by consistently giving a value for the @samp{prefix}
-variable when you run @code{make}, e.g.,
-@example
-make prefix=/usr/gnu
-make prefix=/usr/gnu install
-@end example
-
-You can specify separate installation prefixes for architecture-specific
-files and architecture-independent files. If you give @code{configure}
-the option @samp{--exec-prefix=@var{path}} or set the @code{make}
-variable @samp{exec_prefix} to @var{path}, the package will use
-@var{path} as the prefix for installing programs and libraries. Data
-files and documentation will still use the regular prefix. Normally,
-all files are installed using the same prefix.
-
-Some packages pay attention to @samp{--with-@var{package}} options to
-@code{configure}, where @var{package} is something like @samp{gnu-as} or
-@samp{x} (for the X Window System). They may also pay attention to
-@samp{--enable-@var{feature}} options, where @var{feature} indicates an
-optional part of the package. The README should mention any
-@samp{--with-} and @samp{--enable-} options that the package recognizes.
-
-@code{configure} also recognizes the following options:
-
-@table @code
-@item --help
-Print a summary of the options to @code{configure}, and exit.
-
-@itemx --quiet
-@item --silent
-Do not print messages saying which checks are being made.
-
-@item --verbose
-Print the results of the checks.
-
-@item --version
-Print the version of Autoconf used to generate the @code{configure}
-script, and exit.
-
-@item --x-includes=@var{dir}
-X include files are in @var{dir}.
-
-@item --x-libraries=@var{dir}
-X library files are in @var{dir}.
-@end table
-
-@code{configure} also accepts and ignores some other options.
+Below are instructions on how to configure a package that uses a
+@code{configure} script, suitable for inclusion as an @file{INSTALL}
+file in the package.
@menu
-* Overriding variables:: Workarounds for unusual systems.
-* Invoking config.status:: Recreating a configuration.
+* Basic Installation:: Instructions for typical cases.
+* Compilers and Options:: Selecting compilers and optimization.
+* Build Directory:: Configuring in a different directory.
+* Installation Directories:: Installing in different directories.
+* System Type:: Specifying the system type.
+* Optional Features:: Selecting optional features.
@end menu
-@node Overriding variables, Invoking config.status, , Invoking configure
-@section Overriding variables
-
-On systems that require unusual options for compilation or linking that
-the package's @code{configure} script does not know about, you can give
-@code{configure} initial values for variables by setting them in the
-environment. In Bourne-compatible shells, you can do that on the
-command line like this:
-
-@example
-CC='gcc -traditional' LIBS=-lposix ./configure
-@end example
-
-@noindent
-On systems that have the @code{env} program, you can do it like this:
-
-@example
-env CC='gcc -traditional' LIBS=-lposix ./configure
-@end example
-
-Here are the @code{make} variables that you might want to override with
-environment variables when running @code{configure}.
-
-For these variables, any value given in the environment overrides the
-value that @code{configure} would choose:
-
-@defvar CC
-C compiler program. The default is @code{cc}.
-@end defvar
-
-@defvar INSTALL
-Program to use to install files. The default is @code{install} if you
-have it, @code{cp} otherwise.
-@end defvar
-
-For these variables, any value given in the environment is added to
-the value that @code{configure} chooses:
-
-@defvar DEFS
-Configuration options, in the form @samp{-Dfoo -Dbar@dots{}}. Do not
-use this variable in packages that create a configuration header file.
-@end defvar
-
-@defvar LIBS
-Libraries to link with, in the form @samp{-lfoo -lbar@dots{}}.
-@end defvar
-
-In the long term, most problems requiring manual intervention should be
-fixed by updating either the Autoconf macros or the @file{configure.in}
-file for that package. @xref{Making configure Scripts}, for a
-discussion of that subject.
+@include install.texi
-@node Invoking config.status, , Overriding variables, Invoking configure
-@section Recreating a Configuration
+@node Invoking config.status, Site Default Values, Invoking configure, Top
+@chapter Recreating a Configuration
The @code{configure} script creates a file named @file{config.status}
which describes which configuration options were specified when the
(If @file{configure.in} does not call @code{AC_CONFIG_HEADER}, there is
no need to set @code{CONFIG_HEADERS} in the @code{make} rules.)
-@node Example, Preprocessor Symbol Index, Invoking configure, Top
+@node Site Default Values, Example, Invoking config.status, Top
+@chapter Site Default Values
+
+Autoconf-generated @code{configure} scripts support site and system wide
+initialization files. You can create these files to provide default
+values for some configuration values, both on all of your systems and
+separately for each architecture.
+
+@code{configure} reads the shell script
+@file{@var{exec_prefix}/lib/config.site} if it exists, then
+@file{@var{prefix}/lib/config.site} if it exists. Thus, settings in
+system dependent files override those in system independent ones in case
+of conflict. @code{configure} reads any cache file after it has read
+any site files. This way, the site file can define a default cache
+file, to be shared between all Autoconf-generated @code{configure}
+scripts run on that system.
+
+Site files can be arbitrary shell scripts, but only certain kinds of
+code are really appropriate to be in them. Besides a cache file, they
+are good places to set default values for other shell variables like
+@code{CC}, if you need to give them unusual values: anything you would
+normally do, repetitively, on the command line. If you use non-default
+values for @var{prefix} or @var{exec_prefix}, you can't set them in the
+site file, since you have to specify them on the command line in order
+for @code{configure} to find the site file!
+
+In addition, it is possible to set some cache values in the site file.
+If you are cross-compiling, it is impossible to check features that
+require running a test program. You could ``prime the cache'' by
+setting those values correctly for that system in
+@file{@var{exec_prefix}/lib/config.site}. The cache file is careful to
+not override any variables set in the site files. Similarly, you should
+not override command-line options in the site files. Your code should
+check that variables such as @code{prefix} and @code{cache_file} have
+their default values (as set near the top of @code{configure}) before
+changing them.
+
+@node Example, Preprocessor Symbol Index, Site Default Values, Top
@chapter An Example
Here are sample @file{configure.in} and @file{Makefile.in} files, to
ifdef([__gnu__], , [errprint(Autoconf requires GNU m4
)m4exit(2)])dnl
dnl
-define(AC_ACVERSION, 1.93)dnl
+define(AC_ACVERSION, 1.94)dnl
dnl This is defined by the --version option of the autoconf script.
-ifdef([AC_PRINT_VERSION], [errprint(Autoconf version AC_ACVERSION
-)m4exit(0)])dnl
+ifdef([AC_PRINT_VERSION], [Autoconf version AC_ACVERSION
+m4exit(0)])dnl
dnl
dnl
dnl ### Controlling Autoconf operation
[AC_BEFORE([$0], [AC_ARG_ENABLE])dnl
AC_BEFORE([$0], [AC_ARG_WITH])dnl
# Save the original args to write them into config.status later.
-configure_args="[$]*"
+configure_args="[$]@"
# Omit some internal, obsolete, or unimplemented options to make the
# list less imposing.
x_includes=
x_libraries=
+subdirs=
+
ac_prev=
for ac_option
do
" 1>&6
# Save the original args if we used an alternate arg parser.
-ac_configure_temp="${configure_args-[$]*}"
+ac_configure_temp="${configure_args-[$]@}"
# Strip out --no-create and --norecursion so they do not pile up.
+# Also quote any args containing spaces.
configure_args=
for ac_arg in $ac_configure_temp; do
case "$ac_arg" in
| --no-cr | --no-c) ;;
-norecursion | --norecursion | --norecursio | --norecursi \
| --norecurs | --norecur | --norecu | --norec | --nore | --nor) ;;
+changequote(,)dnl
+ *[" "]*) configure_args="$configure_args '$ac_arg'" ;;
+changequote([,])dnl
*) configure_args="$configure_args $ac_arg" ;;
esac
done
fi
fi
+ifdef([AC_LIST_SUBDIRS],[subdirs="AC_LIST_SUBDIRS"
+AC_SUBST(subdirs)])dnl
ifdef([AC_LIST_PREFIX_PROGRAM], [AC_PREFIX(AC_LIST_PREFIX_PROGRAM)])dnl
dnl Let the site file select an alternate cache file if it wants to.
AC_SITE_LOAD
# as determined by config.guess.
# 4. Target defaults to nonopt.
# 5. If nonopt is not specified, then target defaults to host.
-# 6. build defaults to empty.
+# 6. build defaults to empty (but implicitly to host).
# The aliases save the names the user supplied, while $host etc.
# will get canonicalized.
test -n "$host" && AC_VERBOSE(setting host to $host)
AC_SUBST(host)dnl
AC_SUBST(host_alias)dnl
+AC_SUBST(host_cpu)dnl
+AC_SUBST(host_vendor)dnl
+AC_SUBST(host_os)dnl
])dnl
dnl
define(AC_CANONICAL_TARGET,
test -n "$target" && AC_VERBOSE(setting target to $target)
AC_SUBST(target)dnl
AC_SUBST(target_alias)dnl
+AC_SUBST(target_cpu)dnl
+AC_SUBST(target_vendor)dnl
+AC_SUBST(target_os)dnl
])dnl
dnl
define(AC_CANONICAL_BUILD,
test -n "$build" && AC_VERBOSE(setting build to $build)
AC_SUBST(build)dnl
AC_SUBST(build_alias)dnl
+AC_SUBST(build_cpu)dnl
+AC_SUBST(build_vendor)dnl
+AC_SUBST(build_os)dnl
])dnl
dnl
dnl Link each of the existing files in $2 to the corresponding
CEOF
changequote(,)dnl
dnl Allow a site initialization script to override cache values.
-set | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
+# Ultrix sh set writes to stderr and can't be redirected directly.
+(set) 2>&1 | sed -n "s/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=\${\1-'\2'}/p" >> $cache_file
changequote([,])dnl
fi])dnl
dnl
define(AC_CACHE_VAL,
[dnl We used to use the below line, but it fails if the 1st arg is a
dnl shell variable, so we need the eval.
-dnl if test "${$1+set}" = set; then
+dnl if test "${$1+set}" = set; then
if eval "test \"`echo '${'$1'+set}'`\" = set"; then
dnl This verbose message is just for testing the caching code.
AC_VERBOSE(using cached value for $1)
divert(AC_DIVERSION_NORMAL)dnl
])])dnl
dnl
+dnl AC_SUBST_FILE(VARIABLE, FILE)
+define(AC_SUBST_FILE,
+[if test -f $2; then
+ AC_VERBOSE(using $2 for $1)
+ AC_INSERT_FILE($1, $2)
+elif test -f ${srcdir}/$2; then
+ AC_VERBOSE(using ${srcdir}/$2 for $1)
+ AC_INSERT_FILE($1, ${srcdir}/$2)
+fi
+])dnl
+define(AC_INSERT_FILE,
+[ifdef([AC_SUBST_$1], ,
+[define([AC_SUBST_$1], )dnl
+divert(AC_DIVERSION_SED)dnl
+/@$1@/r [$]$1
+s%@$1@%%g
+divert(AC_DIVERSION_VAR)dnl
+$1='$2'
+divert(AC_DIVERSION_NORMAL)dnl
+])])dnl
+dnl
dnl
dnl ### Printing messages
dnl
ifelse([$3],,, [test -n "[$]$1" || $1="$3"
])])dnl
dnl
-dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+dnl AC_HAVE_LIBRARY(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
+dnl [, OTHER-LIBRARIES]]])
define(AC_HAVE_LIBRARY, [dnl
changequote(/,/)dnl
define(/AC_LIB_NAME/, dnl
AC_CHECKING([for -l[]AC_LIB_NAME])
AC_CACHE_VAL(AC_CV_NAME,
[ac_save_LIBS="${LIBS}"
-LIBS="${LIBS} -l[]AC_LIB_NAME[]"
-AC_TEST_LINK( , [main();],
-AC_CV_NAME=yes, AC_CV_NAME=no)dnl
+LIBS="${LIBS} -l[]AC_LIB_NAME[] $4"
+AC_TEST_LINK( , [main();], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
LIBS="${ac_save_LIBS}"
])dnl
if test "${AC_CV_NAME}" = yes; then
-ifelse($#, 1, [dnl
- AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
- LIBS="${LIBS} -l[]AC_LIB_NAME[]"
-undefine(AC_LIB_NAME)dnl
-undefine(AC_CV_NAME)dnl
-], [dnl
- :; $2
-else
- :; $3
+ ifelse([$2], ,
+[AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
+ LIBS="${LIBS} -l[]AC_LIB_NAME[]"
+], [$2])
+ifelse([$3], , , [else
+ $3
])dnl
fi
+undefine(AC_LIB_NAME)dnl
+undefine(AC_CV_NAME)dnl
])dnl
dnl
dnl
#include "confdefs.h"
[$1]
int main() { return 0; }
-int t() { [$2]; return 0; }
+int t() {
+[$2]
+; return 0; }
EOF
if eval $ac_compile; then
ifelse([$3], , :, [rm -rf conftest*
])dnl
dnl
dnl AC_SIZEOF_TYPE(TYPE)
-define(AC_SIZEOF_TYPE, [dnl
-changequote(<<,>>)dnl
+define(AC_SIZEOF_TYPE,
+[changequote(<<,>>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
undefine(AC_CV_NAME)dnl
])dnl
dnl
+dnl AC_CHECK_TYPE(TYPE, DEFAULT)
+define(AC_CHECK_TYPE,
+[AC_CHECKING(for $1 in sys/types.h)
+AC_CACHE_VAL(ac_cv_type_$1,
+[AC_HEADER_EGREP($1, sys/types.h, ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
+if test $ac_cv_type_$1 = no; then
+ AC_DEFINE($1, $2)
+fi
+])dnl
+dnl
dnl
dnl ### The big finish
dnl
dnl Create the header files listed in $1.
dnl This is a subroutine of AC_OUTPUT. It is called inside a quoted
dnl here document whose contents are going into config.status.
-define(AC_OUTPUT_HEADER,[dnl
-changequote(<<,>>)dnl
+define(AC_OUTPUT_HEADER,
+[changequote(<<,>>)dnl
# These sed commands are put into ac_sed_defs when defining a macro.
# They are broken into pieces to make the sed script easier to manage.
define(AC_OUTPUT_SUBDIRS,
[if test -z "${norecursion}"; then
- # Remove --cache-file arguments so they do not pile up.
+ # Remove --cache-file and --srcdir arguments so they do not pile up.
ac_sub_configure_args=
ac_prev=
for ac_arg in $configure_args; do
-cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
| --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
;;
+ -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+ ac_prev=srcdir ;;
+ -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+ ;;
+changequote(,)dnl
+ *[" "]*) ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
+changequote([,])dnl
*) ac_sub_configure_args="$ac_sub_configure_args $ac_arg" ;;
esac
done
# The recursion is here.
if test -n "${ac_sub_configure}"; then
- AC_VERBOSE([running ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file])
- if ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file
+ AC_VERBOSE([running ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file] --srcdir=${ac_sub_srcdir})
+ if ${CONFIG_SHELL-/bin/sh} ${ac_sub_configure} ${ac_sub_configure_args} --cache-file=$ac_sub_cache_file --srcdir=${ac_sub_srcdir}
then :
else
AC_ERROR(${ac_sub_configure} failed for ${ac_config_dir})
else
ac_cv_prog_gcc=no
fi])dnl
-if test "$ac_cv_prog_gcc" = yes; then GCC=yes; else GCC= ; fi
+if test $ac_cv_prog_gcc = yes; then GCC=yes; else GCC= ; fi
])dnl
dnl
define(AC_PROG_CXX,
else
ac_cv_prog_gxx=no
fi])dnl
-if test "$ac_cv_prog_gxx" = yes; then GXX=yes; else GXX= ; fi
+if test $ac_cv_prog_gxx = yes; then GXX=yes; else GXX= ; fi
])dnl
dnl
define(AC_GCC_TRADITIONAL,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
-if test "$ac_cv_prog_gcc" = yes; then
+if test $ac_cv_prog_gcc = yes; then
AC_CHECKING(whether -traditional is needed)
AC_CACHE_VAL(ac_cv_prog_gcc_traditional,
[ ac_pattern="Autoconf.*'x'"
AC_PROGRAM_EGREP($ac_pattern, $ac_prog,
ac_cv_prog_gcc_traditional=yes, ac_cv_prog_gcc_traditional=no)
- if test "$ac_cv_prog_gcc_traditional" = no; then
+ if test $ac_cv_prog_gcc_traditional = no; then
ac_prog='#include <termio.h>
Autoconf TCGETA'
AC_PROGRAM_EGREP($ac_pattern, $ac_prog, ac_cv_prog_gcc_traditional=yes)
fi])dnl
- if test "$ac_cv_prog_gcc_traditional" = yes; then
+ if test $ac_cv_prog_gcc_traditional = yes; then
CC="$CC -traditional"
AC_VERBOSE(setting CC to $CC)
fi
else
AC_CHECKING(whether cc understands -c and -o together)
fi
+set dummy $CC; ac_cc=[$]2
+AC_CACHE_VAL(ac_cv_prog_cc_${ac_cc}_c_o,
+[ac_cv_prog_cc_${ac_cc}_c_o=no
echo 'foo(){}' > conftest.c
# Make sure it works both with $CC and with simple cc.
# We do the test twice because some compilers refuse to overwrite an
if cc -c conftest.c -o conftest2.o 1>&6 2>&6 &&
test -f conftest2.o && cc -c conftest.c -o conftest2.o 1>&6 2>&6
then
- :
- else
- AC_DEFINE(NO_MINUS_C_MINUS_O)
+ ac_cv_prog_cc_${ac_cc}_c_o=yes
fi
fi
fi
-else
- AC_DEFINE(NO_MINUS_C_MINUS_O)
fi
rm -f conftest*
])dnl
+if test $ac_cv_prog_cc_${ac_cc}_c_o = no; then
+ AC_DEFINE(NO_MINUS_C_MINUS_O)
+fi
+])dnl
dnl
dnl Define SET_MAKE to set ${MAKE} if make doesn't.
define(AC_SET_MAKE,
[AC_CHECKING(whether ${MAKE-make} sets \$MAKE)
-cat > conftestmake <<'EOF'
+set dummy ${MAKE-make}; ac_make=[$]2
+AC_CACHE_VAL(ac_cv_prog_make_${ac_make}_set,
+[cat > conftestmake <<'EOF'
all:
@echo 'ac_maketemp="${MAKE}"'
EOF
eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
changequote([,])dnl
if test -n "$ac_maketemp"; then
+ ac_cv_prog_make_${ac_make}_set=yes
+else
+ ac_cv_prog_make_${ac_make}_set=no
+fi
+rm -f conftestmake])dnl
+if test $ac_cv_prog_make_${ac_make}_set = yes; then
SET_MAKE=
else
SET_MAKE="MAKE=${MAKE-make}"
AC_VERBOSE(setting MAKE to ${MAKE-make} in Makefiles)
fi
-rm -f conftestmake
AC_SUBST([SET_MAKE])dnl
])dnl
dnl
[AC_PROVIDE([$0])dnl
AC_CHECKING(how to run the C preprocessor)
if test -z "$CPP"; then
- # This must be in double quotes, not single quotes, because CPP may get
- # substituted into the Makefile and "${CC-cc}" will simply confuse
- # make. It must be expanded now.
+AC_CACHE_VAL(ac_cv_prog_CPP,
+[ # This must be in double quotes, not single quotes, because CPP may get
+ # substituted into the Makefile and "${CC-cc}" will confuse make.
CPP="${CC-cc} -E"
-dnl On the NeXT, cc -E runs the code through the compiler's parser,
-dnl not just through cpp.
+ # On the NeXT, cc -E runs the code through the compiler's parser,
+ # not just through cpp.
AC_TEST_CPP([#include <stdio.h>
Syntax Error], ,
CPP="${CC-cc} -E -traditional-cpp"
AC_TEST_CPP([#include <stdio.h>
Syntax Error], ,CPP=/lib/cpp))
+ ac_cv_prog_CPP="$CPP"])dnl
fi
+CPP="$ac_cv_prog_CPP"
AC_VERBOSE(setting CPP to $CPP)
AC_SUBST(CPP)dnl
])dnl
define(AC_PROG_CXXCPP,
[AC_PROVIDE([$0])dnl
AC_CHECKING(how to run the C++ preprocessor)
-AC_LANG_SAVE[]dnl
-AC_LANG_CPLUSPLUS[]dnl
if test -z "$CXXCPP"; then
+AC_CACHE_VAL(ac_cv_prog_CXXCPP,
+[AC_LANG_SAVE[]dnl
+AC_LANG_CPLUSPLUS[]dnl
CXXCPP="${CXX-c++} -E"
AC_TEST_CPP([#include <stdlib.h>], , CXXCPP=/lib/cpp)
-fi
-AC_VERBOSE(setting CXXCPP to $CXXCPP)
+ ac_cv_prog_CXXCPP="$CXXCPP"
AC_LANG_RESTORE[]dnl
+fi])dnl
+CXXCPP="$ac_cv_prog_CXXCPP"
+AC_VERBOSE(setting CXXCPP to $CXXCPP)
AC_SUBST(CXXCPP)dnl
])dnl
dnl
AC_VERBOSE(setting LEXLIB to $LEXLIB)
AC_SUBST(LEXLIB)])dnl
dnl
-define(AC_YYTEXT_POINTER,[dnl
-AC_REQUIRE_CPP()dnl
+define(AC_YYTEXT_POINTER,
+[AC_REQUIRE_CPP()dnl
AC_REQUIRE([AC_PROG_LEX])dnl
AC_CHECKING(for yytext declaration)
-# POSIX says lex can declare yytext either as a pointer or an array; the
+AC_CACHE_VALUE(ac_cv_prog_lex_yytext_pointer,
+[# POSIX says lex can declare yytext either as a pointer or an array; the
# default is implementation-dependent. Figure out which it is, since
# not all implementations provide the %pointer and %array declarations.
#
# The minimal lex program is just a single line: %%. But some broken lexes
# (Solaris, I think it was) want two %% lines, so accommodate them.
+ac_cv_prog_lex_yytext_pointer=no
echo '%%
%%' | ${LEX}
if test -f lex.yy.c; then
elif test -f lexyy.c; then
LEX_OUTPUT_ROOT=lexyy
else
- # Do not know what to do here.
- AC_ERROR(cannot find output from $LEX, giving up on yytext declaration)
- LEX_OUTPUT_ROOT=
-fi
-if test -n "$LEX_OUTPUT_ROOT"; then
- echo 'extern char *yytext; main () { exit (0); }' >>$LEX_OUTPUT_ROOT.c
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS $LEXLIB"
- AC_TEST_LINK(`cat $LEX_OUTPUT_ROOT.c`, AC_DEFINE(YYTEXT_POINTER))
- LIBS="$ac_save_LIBS"
- rm -f "${LEX_OUTPUT_ROOT}.c"
+ AC_ERROR(cannot find output from $LEX, giving up)
+fi
+echo 'extern char *yytext; main () { exit (0); }' >>$LEX_OUTPUT_ROOT.c
+ac_save_LIBS="$LIBS"
+LIBS="$LIBS $LEXLIB"
+AC_TEST_LINK(`cat $LEX_OUTPUT_ROOT.c`, ac_cv_prog_lex_yytext_pointer=yes)
+LIBS="$ac_save_LIBS"
+rm -f "${LEX_OUTPUT_ROOT}.c"])dnl
+if test $ac_cv_prog_lex_yytext_pointer = yes; then
+ AC_DEFINE(YYTEXT_POINTER)
fi
AC_SUBST(LEX_OUTPUT_ROOT)dnl
])dnl
''|.|/etc|/sbin|/usr/sbin|/usr/etc|/usr/afsws/bin|/usr/ucb) ;;
*)
# OSF1 and SCO ODT 3.0 have their own names for install.
- for ac_prog in installbsd scoinst install; do
+ for ac_prog in ginstall installbsd scoinst install; do
if test -f $ac_dir/$ac_prog; then
if test $ac_prog = install &&
grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
])dnl
dnl
define(AC_LN_S,
-[AC_CHECKING(for ln -s)
-rm -f conftestdata
+[AC_CHECKING(whether ln -s works)
+AC_CACHE_VAL(ac_cv_prog_LN_S,
+[rm -f conftestdata
if ln -s X conftestdata 2>/dev/null
then
rm -f conftestdata
- LN_S="ln -s"
+ ac_cv_prog_LN_S="ln -s"
+else
+ ac_cv_prog_LN_S=ln
+fi])dnl
+LN_S="$ac_cv_prog_LN_S"
+if test "$ac_cv_prog_LN_S" = "ln -s"; then
AC_VERBOSE(ln -s is supported)
else
- LN_S=ln
AC_VERBOSE(ln -s is not supported)
fi
-AC_SUBST(LN_S)
+AC_SUBST(LN_S)dnl
])dnl
dnl
define(AC_RSH,
[AC_CHECKING(for remote shell)
+AC_CACHE_VAL(ac_cv_path_RSH,
+[ac_cv_path_RSH=true
for ac_file in \
/usr/ucb/rsh /usr/bin/remsh /usr/bin/rsh /usr/bsd/rsh /usr/bin/nsh
do
if test -f $ac_file; then
- AC_VERBOSE(found remote shell $ac_file)
- RTAPELIB=rtapelib.o
+ ac_cv_path_RSH=$ac_file
break
fi
-done
-if test -z "$RTAPELIB"; then
- AC_HEADER_CHECK(netdb.h, AC_DEFINE(HAVE_NETDB_H) RTAPELIB=rtapelib.o,
- AC_DEFINE(NO_REMOTE))
+done])dnl
+RSH="$ac_cv_path_RSH"
+if test $RSH != true; then
+ AC_VERBOSE(found remote shell $RSH)
+ RTAPELIB=rtapelib.o
+else
+ AC_VERBOSE(found no remote shell)
+ AC_HEADER_CHECK(netdb.h, RTAPELIB=rtapelib.o AC_DEFINE(HAVE_NETDB_H),
+ RTAPELIB= AC_DEFINE(NO_REMOTE))
fi
+AC_SUBST(RSH)dnl
AC_SUBST(RTAPELIB)dnl
])dnl
dnl
define(AC_STDC_HEADERS,
[AC_REQUIRE_CPP()dnl
AC_CHECKING(for ANSI C header files)
-AC_TEST_CPP([#include <stdlib.h>
+AC_CACHE_VAL(ac_cv_header_stdc,
+[AC_TEST_CPP([#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
-#include <float.h>], ac_stdc_hdrs=yes, ac_stdc_hdrs=no)
+#include <float.h>], ac_cv_header_stdc=yes, ac_cv_header_stdc=no)
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-AC_HEADER_EGREP(memchr, string.h, , ac_stdc_hdrs=no)
+AC_HEADER_EGREP(memchr, string.h, , ac_cv_header_stdc=no)
fi
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-AC_HEADER_EGREP(free, stdlib.h, , ac_stdc_hdrs=no)
+AC_HEADER_EGREP(free, stdlib.h, , ac_cv_header_stdc=no)
fi
-if test "$ac_stdc_hdrs" = yes; then
+if test $ac_cv_header_stdc = yes; then
# /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
AC_TEST_RUN([#include <ctype.h>
#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
exit (0); }
], , ac_stdc_headers=no)
-fi
-
-if test "$ac_stdc_hdrs" = yes; then
+fi])dnl
+if test $ac_cv_header_stdc = yes; then
AC_DEFINE(STDC_HEADERS)
fi])dnl
dnl
-define(AC_UNISTD_H, [AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(unistd.h)])AC_HEADER_CHECK(unistd.h,
- AC_DEFINE(HAVE_UNISTD_H))])dnl
+define(AC_UNISTD_H,
+[AC_OBSOLETE([$0], [; instead use AC_HAVE_HEADERS(unistd.h)])dnl
+AC_HEADER_CHECK(unistd.h, AC_DEFINE(HAVE_UNISTD_H))])dnl
dnl
define(AC_USG,
[AC_OBSOLETE([$0],
[; instead use AC_HAVE_HEADERS(string.h) and HAVE_STRING_H])dnl
AC_CHECKING([for BSD string and memory functions])
-AC_TEST_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);], , AC_DEFINE(USG))])dnl
+AC_TEST_LINK([#include <strings.h>], [rindex(0, 0); bzero(0, 0);], ,
+ AC_DEFINE(USG))])dnl
dnl
dnl
dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
dnl
define(AC_MAJOR_HEADER,
[AC_CHECKING([for major, minor and makedev header])
-AC_TEST_LINK([#include <sys/types.h>],
-[return makedev(0, 0);], ac_have_makedev=yes, ac_have_makedev=no)
-if test "$ac_have_makedev" = no; then
-AC_HEADER_CHECK(sys/mkdev.h, AC_DEFINE(MAJOR_IN_MKDEV) ac_have_makedev=yes)
-fi
-if test "$ac_have_makedev" = no; then
-AC_HEADER_CHECK(sys/sysmacros.h, AC_DEFINE(MAJOR_IN_SYSMACROS))
-fi]
-)dnl
+AC_CACHE_VAL(ac_cv_header_major,
+[AC_TEST_LINK([#include <sys/types.h>],
+[return makedev(0, 0);], ac_cv_header_major=sys/types.h, ac_cv_header_major=no)
+if test $ac_cv_header_major = no; then
+AC_HEADER_CHECK(sys/mkdev.h, ac_cv_header_major=sys/mkdev.h)
+fi
+if test $ac_cv_header_major = no; then
+AC_HEADER_CHECK(sys/sysmacros.h, ac_cv_header_major=sys/sysmacros.h)
+fi])dnl
+case "$ac_cv_header_major" in
+sys/mkdev.h) AC_DEFINE(MAJOR_IN_MKDEV) ;;
+sys/sysmacros.h) AC_DEFINE(MAJOR_IN_SYSMACROS) ;;
+esac
+])dnl
dnl
define(AC_DIR_HEADER,
[AC_PROVIDE([$0])dnl
AC_CHECKING(for directory library header)
-ac_dir_header=
-AC_DIR_HEADER_CHECK(dirent.h, DIRENT)
-AC_DIR_HEADER_CHECK(sys/ndir.h, SYSNDIR)
-AC_DIR_HEADER_CHECK(sys/dir.h, SYSDIR)
-AC_DIR_HEADER_CHECK(ndir.h, NDIR)
+AC_CACHE_VAL(ac_cv_header_dir,
+[ac_cv_header_dir=no
+for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do
+ AC_CHECKING([for $ac_hdr])
+AC_TEST_LINK([#include <sys/types.h>
+#include <$ac_hdr>], [DIR *dirp = 0;], ac_cv_header_dir=$ac_hdr; break)
+done])dnl
+case "$ac_cv_header_dir" in
+dirent.h) AC_DEFINE(DIRENT) ;;
+sys/ndir.h) AC_DEFINE(SYSNDIR) ;;
+sys/dir.h) AC_DEFINE(SYSDIR) ;;
+ndir.h) AC_DEFINE(NDIR) ;;
+esac
AC_CHECKING(for closedir return value)
-AC_TEST_RUN([#include <sys/types.h>
-#include <$ac_dir_header>
-int closedir(); main() { exit(closedir(opendir(".")) != 0); }], ,
-AC_DEFINE(VOID_CLOSEDIR))
+AC_CACHE_VAL(ac_cv_func_closedir_void,
+[AC_TEST_RUN([#include <sys/types.h>
+#include <$ac_cv_header_dir>
+int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
+ ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes)])dnl
+if test $ac_cv_func_closedir_void = yes; then
+ AC_DEFINE(VOID_CLOSEDIR)
+fi
])dnl
-dnl Subroutine of AC_DIR_HEADER.
-dnl Check if $1 is the winning directory library header file.
-dnl It must not only exist, but also correctly define the `DIR' type.
-dnl If it is really winning, define $2 and set shell var `ac_dir_header' to $1.
-define(AC_DIR_HEADER_CHECK, [dnl
-if test -z "$ac_dir_header"; then
- AC_CHECKING([for $1])
- AC_TEST_LINK([#include <sys/types.h>
-#include <]$1[>],
- [DIR *dirp = 0;],
- AC_DEFINE($2) ac_dir_header=$1)dnl
-fi])dnl
dnl
-define(AC_STAT_MACROS_BROKEN,[AC_CHECKING(for broken stat file mode macros)
-AC_PROGRAM_EGREP([You lose], [#include <sys/types.h>
+define(AC_STAT_MACROS_BROKEN,
+[AC_CHECKING(for broken stat file mode macros)
+AC_CACHE_VAL(ac_cv_header_stat_broken,
+[AC_PROGRAM_EGREP([You lose], [#include <sys/types.h>
#include <sys/stat.h>
#ifdef S_ISBLK
#if S_ISBLK (S_IFDIR)
You lose.
#endif
#endif /* S_ISSOCK */
-], AC_DEFINE(STAT_MACROS_BROKEN))])dnl
+], ac_cv_header_stat_broken=yes, ac_cv_header_stat_broken=no)])dnl
+if test $ac_cv_header_stat_broken = yes; then
+ AC_DEFINE(STAT_MACROS_BROKEN)
+fi
+])dnl
dnl
-define(AC_SYS_SIGLIST_DECLARED,[dnl
-AC_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
-AC_TEST_LINK([#include <signal.h>
+define(AC_SYS_SIGLIST_DECLARED,
+[AC_CHECKING([for sys_siglist declaration in signal.h or unistd.h])
+AC_CACHE_VAL(ac_cv_decl_sys_siglist,
+[AC_TEST_LINK([#include <sys/types.h>
+#include <signal.h>
/* NetBSD declares sys_siglist in unistd.h. */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif], [char *msg = *(sys_siglist + 1);],
- AC_DEFINE(SYS_SIGLIST_DECLARED))])dnl
+ ac_cv_decl_sys_siglist=yes, ac_cv_decl_sys_siglist=no)])dnl
+if test $ac_cv_decl_sys_siglist = yes; then
+ AC_DEFINE(SYS_SIGLIST_DECLARED)
+fi
+])dnl
dnl
dnl
dnl ### Checks for typedefs
define(AC_GETGROUPS_T,
[AC_REQUIRE([AC_UID_T])dnl
AC_CHECKING(for type of array argument to getgroups)
-changequote(,)dnl
-dnl Do not put single quotes in the C program text!!
+AC_CACHE_VAL(ac_cv_type_getgroups,
+[changequote(,)dnl
+dnl Do not put single quotes in the C program text!
ac_prog='/* Thanks to Mike Rendell for this test. */
#include <sys/types.h>
#define NGID 256
}'
changequote([,])dnl
AC_TEST_RUN([$ac_prog],
- AC_DEFINE(GETGROUPS_T, gid_t), AC_DEFINE(GETGROUPS_T, int))
+ ac_cv_type_getgroups=gid_t, ac_cv_type_getgroups=int)])dnl
+AC_DEFINE(GETGROUPS_T, $ac_cv_type_getgroups)
])dnl
dnl
define(AC_UID_T,
[AC_PROVIDE([$0])dnl
AC_CHECKING(for uid_t in sys/types.h)
-AC_HEADER_EGREP(uid_t, sys/types.h, ,
- AC_DEFINE(uid_t, int) AC_DEFINE(gid_t, int))])dnl
+AC_CACHE_VAL(ac_cv_type_uid_t,
+[AC_HEADER_EGREP(uid_t, sys/types.h,
+ ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])dnl
+if test $ac_cv_type_uid_t = no; then
+ AC_DEFINE(uid_t, int)
+ AC_DEFINE(gid_t, int)
+fi
+])dnl
dnl
-define(AC_SIZE_T,
-[AC_CHECKING(for size_t in sys/types.h)
-AC_HEADER_EGREP(size_t, sys/types.h, , AC_DEFINE(size_t, unsigned))])dnl
+define(AC_SIZE_T, [AC_CHECK_TYPE(size_t, unsigned)])dnl
dnl
-define(AC_PID_T,
-[AC_PROVIDE([$0])dnl
-AC_CHECKING(for pid_t in sys/types.h)
-AC_HEADER_EGREP(pid_t, sys/types.h, , AC_DEFINE(pid_t, int))])dnl
+define(AC_PID_T, [AC_CHECK_TYPE(pid_t, int)])dnl
dnl
define(AC_OFF_T,
[AC_PROVIDE([$0])dnl
-AC_CHECKING(for off_t in sys/types.h)
-AC_HEADER_EGREP(off_t, sys/types.h, , AC_DEFINE(off_t, long))])dnl
+AC_CHECK_TYPE(off_t, long)])dnl
dnl
-define(AC_MODE_T,
-[AC_CHECKING(for mode_t in sys/types.h)
-AC_HEADER_EGREP(mode_t, sys/types.h, , AC_DEFINE(mode_t, int))])dnl
+define(AC_MODE_T, [AC_CHECK_TYPE(mode_t, int)])dnl
dnl
dnl Note that identifiers starting with SIG are reserved by ANSI C.
define(AC_RETSIGTYPE,
[AC_PROVIDE([$0])dnl
AC_CHECKING([return type of signal handlers])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_type_signal,
+[AC_TEST_LINK([#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();],
-[int i;],
-[AC_DEFINE(RETSIGTYPE, void)],
-[AC_DEFINE(RETSIGTYPE, int)])]
-)dnl
+[int i;], ac_cv_type_signal=void, ac_cv_type_signal=int)])dnl
+AC_DEFINE(RETSIGTYPE, $ac_cv_type_signal)
+])dnl
dnl
dnl
dnl ### Checks for functions
dnl
dnl
-define(AC_MMAP, [
-AC_CHECKING(for working mmap)
-AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
+define(AC_MMAP,
+[AC_CHECKING(for working mmap)
+AC_CACHE_VAL(ac_cv_func_mmap,
+[AC_TEST_RUN([/* Thanks to Mike Haertel and Jim Avera for this test. */
#include <sys/types.h>
#include <fcntl.h>
#include <sys/mman.h>
exit(1);
exit(0);
}
-], AC_DEFINE(HAVE_MMAP))
+], ac_cv_func_mmap=yes, ac_cv_func_mmap=no)])dnl
+if test $ac_cv_func_mmap = yes; then
+ AC_DEFINE(HAVE_MMAP)
+fi
])dnl
dnl
define(AC_VPRINTF,
[AC_REQUIRE([AC_PID_T])dnl
AC_HEADER_CHECK(vfork.h, AC_DEFINE(HAVE_VFORK_H))
AC_CHECKING(for working vfork)
-AC_REQUIRE([AC_RETSIGTYPE])
+AC_CACHE_VAL(ac_cv_func_vfork,
+[AC_REQUIRE([AC_RETSIGTYPE])
AC_TEST_RUN([/* Thanks to Paul Eggert for this test. */
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_VFORK_H
#include <vfork.h>
#endif
+/* On sparc systems, changes by the child to local and incoming
+ argument registers are propagated back to the parent.
+ The compiler is told about this with #include <vfork.h>,
+ but some compilers (e.g. gcc -O) don't grok <vfork.h>.
+ Test for this by using a static variable whose address
+ is put into a register that is clobbered by the vfork. */
+static
+sparc_address_test (arg) int arg; {
+ static pid_t child;
+ if (!child) {
+ child = vfork ();
+ if (child < 0)
+ perror ("vfork");
+ if (!child) {
+ arg = getpid();
+ write(-1, "", 0);
+ _exit (arg);
+ }
+ }
+}
static int signalled;
static RETSIGTYPE catch (s) int s; { signalled = 1; }
main() {
pid_t parent = getpid ();
pid_t child;
+ sparc_address_test ();
+
signal (SIGINT, catch);
child = vfork ();
if (child == 0) {
- /* On sparc systems, changes by the child to local and incoming
- argument registers are propagated back to the parent.
- The compiler is told about this with #include <vfork.h>,
- but some compilers (e.g. gcc -O) don't grok <vfork.h>.
- Test for this by using lots of local variables, at least
+ /* Here is another test for sparc vfork register problems.
+ This test uses lots of local variables, at least
as many local variables as main has allocated so far
including compiler temporaries. 4 locals are enough for
gcc 1.40.3 on a sparc, but we use 8 to be safe.
|| fstat(fileno(stdout), &st) != 0
);
}
-}], , AC_DEFINE(vfork, fork))
+}], ac_cv_func_vfork=yes, ac_cv_func_vfork=no)])dnl
+if test $ac_cv_func_vfork = no; then
+ AC_DEFINE(vfork, fork)
+fi
])dnl
dnl
define(AC_WAIT3,
[AC_CHECKING(for wait3 that fills in rusage)
-AC_TEST_RUN([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_func_wait3,
+[AC_TEST_RUN([#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdio.h>
exit(r.ru_nvcsw == 0
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
}
-}], AC_DEFINE(HAVE_WAIT3))
+}], ac_cv_func_wait3=yes, ac_cv_func_wait3=no)])dnl
+if test $ac_cv_func_wait3 = yes; then
+ AC_DEFINE(HAVE_WAIT3)
+fi
])dnl
dnl
define(AC_ALLOCA,
[# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
# for constant arguments. Useless!
AC_CHECKING([for working alloca.h])
-AC_TEST_LINK([#include <alloca.h>],
- [char *p = alloca(2 * sizeof(int));], AC_DEFINE(HAVE_ALLOCA_H))
+AC_CACHE_VAL(ac_cv_header_alloca_h,
+[AC_TEST_LINK([#include <alloca.h>], [char *p = alloca(2 * sizeof(int));],
+ ac_cv_header_alloca_h=yes, ac_cv_header_alloca_h=no)])dnl
+if test $ac_cv_header_alloca_h = yes; then
+ AC_DEFINE(HAVE_ALLOCA_H)
+fi
-ac_decl="#ifdef __GNUC__
+AC_CHECKING([for alloca])
+AC_CACHE_VAL(ac_cv_func_alloca,
+[AC_TEST_LINK([#ifdef __GNUC__
#define alloca __builtin_alloca
#else
#if HAVE_ALLOCA_H
#endif
#endif
#endif
-"
-AC_CHECKING([for alloca])
-AC_TEST_LINK($ac_decl,
-[char *p = (char *) alloca(1);],
-[ac_have_alloca=yes AC_DEFINE([HAVE_ALLOCA])], ac_have_alloca=no)
+], [char *p = (char *) alloca(1);],
+ ac_cv_func_alloca=yes, ac_cv_func_alloca=no)])dnl
+if test $ac_cv_func_alloca = yes; then
+ AC_DEFINE(HAVE_ALLOCA)
+fi
-if test "$ac_have_alloca" = no; then
+if test $ac_cv_func_alloca = no; then
# The SVR3 libPW and SVR4 libucb both contain incompatible functions
# that cause trouble. Some versions do not even contain alloca or
# contain a buggy version. If you still want to use their alloca,
wenotbecray
#endif
],
-AC_FUNC_CHECK([_getb67],AC_DEFINE([CRAY_STACKSEG_END],[_getb67]),
-AC_FUNC_CHECK([GETB67],AC_DEFINE([CRAY_STACKSEG_END],[GETB67]),
-AC_FUNC_CHECK([getb67],AC_DEFINE([CRAY_STACKSEG_END],[getb67])))))
+AC_FUNC_CHECK([_getb67],AC_DEFINE(CRAY_STACKSEG_END, _getb67),
+AC_FUNC_CHECK([GETB67],AC_DEFINE(CRAY_STACKSEG_END, GETB67),
+AC_FUNC_CHECK([getb67],AC_DEFINE(CRAY_STACKSEG_END, getb67)))))
AC_CHECKING(stack direction for C alloca)
-AC_TEST_RUN([find_stack_direction ()
+AC_CACHE_VAL(ac_cv_c_stack_direction,
+[AC_TEST_RUN([find_stack_direction ()
{
static char *addr = 0;
auto char dummy;
main ()
{
exit (find_stack_direction() < 0);
-}],
-AC_DEFINE(STACK_DIRECTION,1), AC_DEFINE(STACK_DIRECTION,-1),
-AC_DEFINE(STACK_DIRECTION,0))
+}], ac_cv_c_stack_direction=1, ac_cv_c_stack_direction=-1,
+ ac_cv_c_stack_direction=0)])dnl
+AC_DEFINE(STACK_DIRECTION, $ac_cv_c_stack_direction)
fi
AC_SUBST(ALLOCA)dnl
])dnl
dnl
define(AC_GETLOADAVG,
[# Some definitions of getloadavg require that the program be installed setgid.
-AC_SUBST(NEED_SETGID)NEED_SETGID=false
-ac_need_func=yes
+NEED_SETGID=false
+AC_SUBST(NEED_SETGID)dnl
+ac_have_func=no
# Check for the 4.4BSD definition of getloadavg.
-AC_HAVE_LIBRARY(util, LIBS="$LIBS -lutil" ac_need_func=no)
+AC_HAVE_LIBRARY(util, [LIBS="$LIBS -lutil" ac_have_func=yes
# Some systems with -lutil have (and need) -lkvm as well, some do not.
-AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")
+AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")])
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
# There is a commonly available library for RS/6000 AIX.
# Since it is not a standard part of AIX, it might be installed locally.
-ac_save_LIBS="$LIBS"
-LIBS="-L/usr/local/lib $LIBS"
-AC_HAVE_LIBRARY(getloadavg, LIBS="$LIBS -lgetloadavg" ac_need_func=no,
- LIBS="$ac_save_LIBS")
+ac_save_LIBS="$LIBS" LIBS="-L/usr/local/lib $LIBS"
+AC_HAVE_LIBRARY(getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
fi
-# Make sure it is really in the library, if we think we found it at all.
+# Make sure it is really in the library, if we think we found it.
AC_REPLACE_FUNCS(getloadavg)
-case "$LIBOBJS" in
-*getloadavg*)
-ac_need_func=yes
-AC_HEADER_CHECK(sys/dg_sys_info.h, [dnl
-AC_DEFINE(DGUX) ac_need_func=no
+if test $ac_cv_func_getloadavg = yes; then
+ AC_DEFINE(HAVE_GETLOADAVG)
+else
+ac_have_func=no
+AC_HEADER_CHECK(sys/dg_sys_info.h,
+[ac_have_func=yes AC_DEFINE(DGUX)
# Some versions of DGUX need -ldgc for dg_sys_info.
AC_HAVE_LIBRARY(dgc)])
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
# Irix 4.0.5F has the header but not the library.
-AC_HAVE_LIBRARY(elf, AC_DEFINE(SVR4) LIBS="$LIBS -lelf" ac_need_func=no
- AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm"))
+AC_HAVE_LIBRARY(elf,
+ [LIBS="$LIBS -lelf" ac_have_func=yes AC_DEFINE(SVR4)
+ AC_HAVE_LIBRARY(kvm, LIBS="$LIBS -lkvm")])
fi
-if test "$ac_need_func" = yes; then
-AC_HEADER_CHECK(inq_stats/cpustats.h, AC_DEFINE(UMAX4_3) AC_DEFINE(UMAX)
- ac_need_func=no)
+if test $ac_have_func = no; then
+AC_HEADER_CHECK(inq_stats/cpustats.h,
+ [ac_have_func=yes AC_DEFINE(UMAX4_3) AC_DEFINE(UMAX)])
fi
-if test "$ac_need_func" = yes; then
-AC_HEADER_CHECK(sys/cpustats.h, AC_DEFINE(UMAX) ac_need_func=no)
+if test $ac_have_func = no; then
+AC_HEADER_CHECK(sys/cpustats.h,
+ [ac_have_func=yes AC_DEFINE(UMAX)])
fi
-if test "$ac_need_func" = yes; then
+if test $ac_have_func = no; then
AC_HAVE_HEADERS(mach/mach.h)
fi
AC_HEADER_CHECK(nlist.h,
[AC_DEFINE(NLIST_STRUCT)
AC_CHECKING([for n_un in struct nlist])
-AC_TEST_LINK([#include <nlist.h>],
+AC_CACHE_VAL(ac_cv_struct_nlist_n_un,
+[AC_TEST_LINK([#include <nlist.h>],
[struct nlist n; n.n_un.n_name = 0;],
-AC_DEFINE(NLIST_NAME_UNION))])dnl
+ac_cv_struct_nlist_n_un=yes, ac_cv_struct_nlist_n_un=no)])dnl
+if test $ac_cv_struct_nlist_n_un = yes; then
+ AC_DEFINE(NLIST_NAME_UNION)
+fi
+])dnl
-# Figure out whether we will need to install setgid.
-AC_PROGRAM_EGREP([Yowza Am I SETGID yet], [dnl
-#include "${srcdir}/getloadavg.c"
+AC_CHECKING(whether getloadavg requires setgid)
+AC_CACHE_VAL(ac_cv_func_getloadavg_setgid,
+[AC_PROGRAM_EGREP([Yowza Am I SETGID yet],
+[#include "${srcdir}/getloadavg.c"
#ifdef LDAV_PRIVILEGED
Yowza Am I SETGID yet
-#endif], [AC_DEFINE(GETLOADAVG_PRIVILEGED) NEED_SETGID=true])dnl
-;;
+#endif],
+ ac_cv_func_getloadavg_setgid=yes, ac_cv_func_getloadavg_setgid=no)])dnl
+if test $ac_cv_func_getloadavg_setgid = yes; then
+ NEED_SETGID=true AC_DEFINE(GETLOADAVG_PRIVILEGED)
+fi
-*) AC_DEFINE(HAVE_GETLOADAVG) ;;
-esac
+fi # Do not have getloadavg in system libraries.
if test "$NEED_SETGID" = true; then
-AC_SUBST(KMEM_GROUP)dnl
- # Figure out what group owns /dev/kmem.
- # The installed program will need to be setgid and owned by that group.
-changequote(,)dnl
+ AC_CHECKING(group of /dev/kmem)
+AC_CACHE_VAL(ac_cv_group_kmem,
+[changequote(,)dnl
# On Solaris, /dev/kmem is a symlink. Get info on the real file.
ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
# If we got an error (system does not support symlinks), try without -L.
test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
- KMEM_GROUP=`echo $ac_ls_output \
+ ac_cv_group_kmem=`echo $ac_ls_output \
| sed -ne 's/[ ][ ]*/ /g;
s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
/ /s/.* //;p;'`
changequote([,])dnl
+])dnl
+ KMEM_GROUP=$ac_cv_group_kmem
AC_VERBOSE(/dev/kmem is owned by $KMEM_GROUP)
fi
+AC_SUBST(KMEM_GROUP)dnl
])dnl
dnl
define(AC_UTIME_NULL,
[AC_CHECKING(utime with null argument)
-rm -f conftestdata; > conftestdata
+AC_CACHE_VAL(ac_cv_func_utime_null,
+[rm -f conftestdata; > conftestdata
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_TEST_RUN([#include <sys/types.h>
#include <sys/stat.h>
exit(!(stat ("conftestdata", &s) == 0 && utime("conftestdata", (long *)0) == 0
&& stat("conftestdata", &t) == 0 && t.st_mtime >= s.st_mtime
&& t.st_mtime - s.st_mtime < 120));
-}], AC_DEFINE(HAVE_UTIME_NULL))
-rm -f core
+}], ac_cv_func_utime_null=yes, ac_cv_func_utime_null=no)
+rm -f core])dnl
+if test $ac_cv_func_utime_null = yes; then
+ AC_DEFINE(HAVE_UTIME_NULL)
+fi
])dnl
dnl
-define(AC_STRCOLL, [AC_CHECKING(for strcoll)
-AC_TEST_RUN([#include <string.h>
+define(AC_STRCOLL,
+[AC_CHECKING(for strcoll)
+AC_CACHE_VAL(ac_cv_func_strcoll,
+[AC_TEST_RUN([#include <string.h>
main ()
{
exit (strcoll ("abc", "def") >= 0 ||
strcoll ("ABC", "DEF") >= 0 ||
strcoll ("123", "456") >= 0);
-}], AC_DEFINE(HAVE_STRCOLL))])dnl
+}], ac_cv_func_strcoll=yes, ac_cv_func_strcoll=no)])dnl
+if test $ac_cv_func_strcoll = yes; then
+ AC_DEFINE(HAVE_STRCOLL)
+fi
+])dnl
dnl
define(AC_SETVBUF_REVERSED,
[AC_CHECKING(whether setvbuf arguments are reversed)
-AC_TEST_RUN([#include <stdio.h>
+AC_CACHE_VAL(ac_cv_func_setvbuf_reversed,
+[AC_TEST_RUN([#include <stdio.h>
/* If setvbuf has the reversed format, exit 0. */
main () {
/* This call has the arguments reversed.
exit(1);
putc('\r', stdout);
exit(0); /* Non-reversed systems segv here. */
-}], AC_DEFINE(SETVBUF_REVERSED))
-rm -f core
+}], ac_cv_func_setvbuf_reversed=yes, ac_cv_func_setvbuf_reversed=no)
+rm -f core])dnl
+if test $ac_cv_func_setvbuf_reversed = yes; then
+ AC_DEFINE(SETVBUF_REVERSED)
+fi
])dnl
dnl
dnl
define(AC_STRUCT_TM,
[AC_PROVIDE([$0])dnl
AC_CHECKING([for struct tm in sys/time.h instead of time.h])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_tm,
+[AC_TEST_LINK([#include <sys/types.h>
#include <time.h>],
-[struct tm *tp; tp->tm_sec;], , AC_DEFINE(TM_IN_SYS_TIME))])dnl
+[struct tm *tp; tp->tm_sec;],
+ ac_cv_struct_tm=time.h, ac_cv_struct_tm=sys/time.h)])dnl
+if test $ac_cv_struct_tm = sys/time.h; then
+ AC_DEFINE(TM_IN_SYS_TIME)
+fi
+])dnl
dnl
define(AC_TIME_WITH_SYS_TIME,
[AC_CHECKING([whether time.h and sys/time.h may both be included])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_header_time,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/time.h>
#include <time.h>],
-[struct tm *tp;], AC_DEFINE(TIME_WITH_SYS_TIME))])dnl
+[struct tm *tp;], ac_cv_header_time=yes, ac_cv_header_time=no)])dnl
+if test $ac_cv_header_time = yes; then
+ AC_DEFINE(TIME_WITH_SYS_TIME)
+fi
+])dnl
dnl
define(AC_TIMEZONE,
[AC_REQUIRE([AC_STRUCT_TM])dnl
-ac_decl='#include <sys/types.h>
-'
-case "$DEFS" in
- *TM_IN_SYS_TIME*) ac_decl="$ac_decl
-#include <sys/time.h>
-" ;;
- *) ac_decl="$ac_decl
-#include <time.h>
-" ;;
-esac
AC_CHECKING([for tm_zone in struct tm])
-AC_TEST_LINK($ac_decl,
-[struct tm tm; tm.tm_zone;],
-[ac_have_tm_zone=yes AC_DEFINE(HAVE_TM_ZONE)], ac_have_tm_zone=no)
-
-if test "$ac_have_tm_zone" = no; then
-AC_CHECKING([for tzname])
-AC_TEST_LINK(changequote(<<,>>)dnl
+AC_CACHE_VAL(ac_cv_struct_tm_zone,
+[AC_TEST_LINK([#include <sys/types.h>
+#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_zone;],
+ ac_cv_struct_tm_zone=yes, ac_cv_struct_tm_zone=no)])dnl
+if test "$ac_cv_struct_tm_zone" = yes; then
+ AC_DEFINE(HAVE_TM_ZONE)
+else
+ AC_CHECKING([for tzname])
+AC_CACHE_VAL(ac_cv_var_tzname,
+[AC_TEST_LINK(changequote(<<,>>)dnl
<<#include <time.h>
#ifndef tzname /* For SGI. */
extern char *tzname[]; /* RS6000 and others reject char **tzname. */
#endif>>, changequote([,])dnl
-[atoi(*tzname);], AC_DEFINE(HAVE_TZNAME))
+[atoi(*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)])dnl
+ if test $ac_cv_var_tzname = yes; then
+ AC_DEFINE(HAVE_TZNAME)
+ fi
fi
])dnl
dnl
define(AC_ST_BLOCKS,
[AC_CHECKING([for st_blocks in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_blocks,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_blocks;],
-AC_DEFINE(HAVE_ST_BLOCKS), LIBOBJS="$LIBOBJS fileblocks.o")dnl
+ac_cv_struct_st_blocks=yes, ac_cv_struct_st_blocks=no)])dnl
+if test $ac_cv_struct_st_blocks = yes; then
+ AC_DEFINE(HAVE_ST_BLOCKS)
+else
+ LIBOBJS="$LIBOBJS fileblocks.o"
+fi
AC_SUBST(LIBOBJS)dnl
])dnl
dnl
define(AC_ST_BLKSIZE,
[AC_CHECKING([for st_blksize in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_blksize,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_blksize;],
-AC_DEFINE(HAVE_ST_BLKSIZE))])dnl
+ac_cv_struct_st_blksize=yes, ac_cv_struct_st_blksize=no)])dnl
+if test $ac_cv_struct_st_blksize = yes; then
+ AC_DEFINE(HAVE_ST_BLKSIZE)
+fi
+])dnl
dnl
define(AC_ST_RDEV,
[AC_CHECKING([for st_rdev in struct stat])
-AC_TEST_LINK([#include <sys/types.h>
+AC_CACHE_VAL(ac_cv_struct_st_rdev,
+[AC_TEST_LINK([#include <sys/types.h>
#include <sys/stat.h>], [struct stat s; s.st_rdev;],
-AC_DEFINE(HAVE_ST_RDEV))])dnl
+ac_cv_struct_st_rdev=yes, ac_cv_struct_st_rdev=no)])dnl
+if test $ac_cv_struct_st_rdev = yes; then
+ AC_DEFINE(HAVE_ST_RDEV)
+fi
+])dnl
dnl
dnl
dnl ### Checks for compiler characteristics
dnl
define(AC_CROSS_CHECK,
[AC_PROVIDE([$0])dnl
-AC_CHECKING(whether cross-compiling)
# If we cannot run a trivial program, we must be cross compiling.
-AC_TEST_RUN([main(){exit(0);}], cross_compiling=, cross_compiling=yes)
-if test "$cross_compiling" = yes; then
+AC_CHECKING(whether cross-compiling)
+AC_CACHE_VAL(ac_cv_c_cross,
+[AC_TEST_RUN([main(){exit(0);}], ac_cv_c_cross=no, ac_cv_c_cross=yes)])dnl
+cross_compiling=$ac_cv_c_cross
+if test $ac_cv_c_cross = yes; then
AC_VERBOSE(we are cross-compiling)
+else
+ AC_VERBOSE(we are not cross-compiling)
fi])dnl
dnl
define(AC_CHAR_UNSIGNED,
[AC_CHECKING(for unsigned characters)
-AC_TEST_RUN(
+AC_CACHE_VAL(ac_cv_c_char_unsigned,
+[AC_TEST_RUN(
[/* volatile prevents gcc2 from optimizing the test away on sparcs. */
#if !__STDC__
#define volatile
#else
volatile char c = 255; exit(c < 0);
#endif
-}], AC_DEFINE(__CHAR_UNSIGNED__))]
-)dnl
+}], ac_cv_c_char_unsigned=yes, ac_cv_c_char_unsigned=no)])dnl
+if test $ac_cv_c_char_unsigned = yes; then
+ AC_DEFINE(__CHAR_UNSIGNED__)
+fi
+])dnl
dnl
define(AC_LONG_DOUBLE,
[AC_REQUIRE([AC_PROG_CC])dnl
AC_CHECKING(for long double)
-if test "$GCC" = yes; then
-AC_DEFINE(HAVE_LONG_DOUBLE)
+AC_CACHE_VAL(ac_cv_c_long_double,
+[if test "$GCC" = yes; then
+ ac_cv_c_long_double=yes
else
AC_TEST_RUN([int main() {
/* The Stardent Vistra knows sizeof(long double), but does not support it. */
long double foo = 0.0;
/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
exit(sizeof(long double) < sizeof(double)); }],
-AC_DEFINE(HAVE_LONG_DOUBLE))
+ac_cv_c_long_double=yes, ac_cv_c_long_double=no)
+fi])dnl
+if test $ac_cv_c_long_double = yes; then
+ AC_DEFINE(HAVE_LONG_DOUBLE)
fi
])dnl
dnl
dnl
define(AC_WORDS_BIGENDIAN,
[AC_CHECKING(byte ordering)
-AC_TEST_RUN([main () {
+AC_CACHE_VAL(ac_cv_c_bigendian,
+[AC_TEST_RUN([main () {
/* Are we little or big endian? From Harbison&Steele. */
union
{
} u;
u.l = 1;
exit (u.c[sizeof (long) - 1] == 1);
-}], , AC_DEFINE(WORDS_BIGENDIAN))
+}], ac_cv_c_bigendian=no, ac_cv_c_bigendian=yes)])dnl
+if test $ac_cv_c_bigendian = yes; then
+ AC_DEFINE(WORDS_BIGENDIAN)
+fi
])dnl
dnl
define(AC_ARG_ARRAY,
[AC_CHECKING(whether the address of an argument can be used as an array)
-AC_TEST_RUN([main() {
+AC_CACHE_VAL(ac_cv_c_arg_array,
+[AC_TEST_RUN([main() {
/* Return 0 iff arg arrays are ok. */
exit(!x(1, 2, 3, 4));
}
/* Return 1 iff arg arrays are ok. */
y(a, b) int *b; {
return a == 1 && b[0] == 2 && b[1] == 3 && b[2] == 4;
-}], , AC_DEFINE(NO_ARG_ARRAY))
-rm -f core
+}], ac_cv_c_arg_array=no, ac_cv_c_arg_array=yes)
+rm -f core])dnl
+if test $ac_cv_c_arg_array = no; then
+ AC_DEFINE(NO_ARG_ARRAY)
+fi
])dnl
dnl
define(AC_INLINE,
[AC_REQUIRE([AC_PROG_CC])dnl
-if test "$GCC" = yes; then
AC_CHECKING([for inline])
-AC_TEST_LINK( , [} inline foo() {], , AC_DEFINE(inline, __inline))
+AC_CACHE_VAL(ac_cv_c_inline,
+[if test "$GCC" = yes; then
+AC_TEST_LINK( , [} inline foo() {], ac_cv_c_inline=yes, ac_cv_c_inline=no)
+else
+ ac_cv_c_inline=no
+fi])dnl
+if test $ac_cv_c_inline = no; then
+ AC_DEFINE(inline, __inline)
fi
])dnl
define(AC_CONST,
+[dnl Do not "break" this again.
+AC_CHECKING([for lack of working const])
+AC_CACHE_VAL(ac_cv_c_const,
[changequote(,)dnl
-dnl Do not put single quotes in the C program text!!
+dnl Do not put single quotes in the C program text!
ac_prog='/* Ultrix mips cc rejects this. */
typedef int charset[2]; const charset x;
/* SunOS 4.1.1 cc rejects this. */
const int foo = 10;
}'
changequote([,])dnl
-dnl Do not "break" this again.
-AC_CHECKING([for lack of working const])
-AC_TEST_LINK( , [$ac_prog], , AC_DEFINE(const,))])dnl
+AC_TEST_LINK( , [$ac_prog], ac_cv_c_const=yes, ac_cv_c_const=no)])dnl
+if test $ac_cv_c_const = no; then
+ AC_DEFINE(const,)
+fi
+])dnl
dnl
dnl
dnl ### Checks for operating system services
dnl
dnl
-define(AC_HAVE_POUNDBANG, [dnl
-AC_CHECKING(whether [#]! works in shell scripts)
-echo '#!/bin/cat
+define(AC_HAVE_POUNDBANG,
+[AC_CHECKING(whether [#]! works in shell scripts)
+AC_CACHE_VAL(ac_cv_sys_interpreter,
+[echo '#!/bin/cat
exit 69
' > conftest
chmod u+x conftest
(SHELL=/bin/sh; export SHELL; ./conftest > /dev/null)
if test $? -ne 69; then
- :; $1
+ ac_cv_sys_interpreter=yes
else
- :; $2
+ ac_cv_sys_interpreter=no
+fi
+rm -f conftest])dnl
+if test $ac_cv_sys_interpreter = yes; then
+ ifelse([$1], , :, [$1])
+ifelse([$2], , , [else
+ $2
+])dnl
fi
-rm -f conftest
])dnl
define(AC_REMOTE_TAPE,
[AC_CHECKING(for remote tape and socket header files)
-AC_HEADER_CHECK(sys/mtio.h,
-[ac_have_mtio_h=yes AC_DEFINE(HAVE_SYS_MTIO_H)], ac_have_mtio_h=no)
+AC_HEADER_CHECK(sys/mtio.h, AC_DEFINE(HAVE_SYS_MTIO_H))
-if test "$ac_have_mtio_h" = yes; then
-AC_TEST_CPP([#include <sgtty.h>
-#include <sys/socket.h>], PROGS="$PROGS rmt")
+if test "$ac_cv_header_mtio_h" = yes; then
+AC_CACHE_VAL(ac_cv_header_rmt,
+[AC_TEST_CPP([#include <sgtty.h>
+#include <sys/socket.h>], ac_cv_header_rmt=yes, ac_cv_header_rmt=no)])dnl
+ if test $ac_cv_header_rmt = yes; then
+ PROGS="$PROGS rmt"
+ fi
fi
+AC_SUBST(PROGS)dnl
])dnl
dnl
define(AC_LONG_FILE_NAMES,
[AC_CHECKING(for long file names)
-ac_some_dir_failed=no
+AC_CACHE_VAL(ac_cv_sys_long_file_names,
+[ac_cv_sys_long_file_names=yes
# Test for long file names in all the places we know might matter:
# . the current directory, where building will happen
# /tmp where it might want to write temporary files
(echo 1 > $ac_dir/conftest9012345) 2>/dev/null
(echo 2 > $ac_dir/conftest9012346) 2>/dev/null
val=`cat $ac_dir/conftest9012345 2>/dev/null`
- test -f $ac_dir/conftest9012345 && test "$val" = 1 || ac_some_dir_failed=yes
+ if test ! -f $ac_dir/conftest9012345 || test "$val" != 1; then
+ ac_cv_sys_long_file_names=no
+ rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2> /dev/null
+ break
+ fi
rm -f $ac_dir/conftest9012345 $ac_dir/conftest9012346 2> /dev/null
-done
-test "$ac_some_dir_failed" = yes || AC_DEFINE(HAVE_LONG_FILE_NAMES)
+done])dnl
+if test $ac_cv_sys_long_file_names = yes; then
+ AC_DEFINE(HAVE_LONG_FILE_NAMES)
+fi
])dnl
dnl
define(AC_RESTARTABLE_SYSCALLS,
[AC_CHECKING(for restartable system calls)
-AC_TEST_RUN(
+AC_CACHE_VAL(ac_cv_sys_restartable_syscalls,
+[AC_TEST_RUN(
[/* Exit 0 (true) if wait returns something other than -1,
i.e. the pid of the child, which means that wait was restarted
after getting the signal. */
if (status == -1) wait(&i);
exit (status == -1);
}
-], AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS))
+], ac_cv_sys_restartable_syscalls=yes, ac_cv_sys_restartable_syscalls=no)])dnl
+if test $ac_cv_sys_restartable_syscalls = yes; then
+ AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS)
+fi
])dnl
dnl
define(AC_FIND_X,
# If we find X, set shell vars x_includes and x_libraries to the paths.
no_x=yes
if test "x$with_x" != xno; then
+
+# Command line options override cache.
+# FIXME We need to allow --x=includes= to work, I think.
+test -n "$x_includes" && ac_cv_x_includes="$x_includes"
+test -n "$x_libraries" && ac_cv_x_includes="$x_libraries"
+if test "${ac_cv_x_includes+set}" = set &&
+ test "${ac_cv_x_libraries+set}" = set; then
+ AC_VERBOSE(using cached values for ac_cv_x_includes and ac_cv_x_libraries)
+else
AC_FIND_X_XMKMF
-if test -z "$ac_im_usrlibdir"; then
+fi
+if test "${ac_cv_x_includes+set}" != set ||
+ test "${ac_cv_x_libraries+set}" != set; then
AC_FIND_X_DIRECT
fi
+test -z "$ac_cv_x_includes" && ac_cv_x_includes=NONE
+test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=NONE
+
+# FIXME can we reliably distinguish cache values that are set to empty
+# from those that aren't set?
+if test -z "$x_includes" && test "$ac_cv_x_includes" != NONE; then
+ x_includes="$ac_cv_x_includes"
+fi
+if test -z "$x_libraries" && test "$ac_cv_x_libraries" != NONE; then
+ x_libraries="$ac_cv_x_libraries"
+fi
+
test -n "$x_includes" && AC_VERBOSE(X11 headers are in $x_includes)
test -n "$x_libraries" && AC_VERBOSE(X11 libraries are in $x_libraries)
-fi
+fi # No --with-x=no.
])dnl
dnl
dnl Internal subroutine of AC_FIND_X.
fi
case "$ac_im_incroot" in
/usr/include) ;;
- *) test -z "$x_includes" && x_includes="$ac_im_incroot" ;;
+ *) test -z "$ac_cv_x_includes" && ac_cv_x_includes="$ac_im_incroot" ;;
esac
case "$ac_im_usrlibdir" in
/usr/lib | /lib) ;;
- *) test -z "$x_libraries" && x_libraries="$ac_im_usrlibdir" ;;
+ *) test -z "$ac_cv_x_libraries" && ac_cv_x_libraries="$ac_im_usrlibdir" ;;
esac
fi
cd ..
dnl Internal subroutine of AC_FIND_X.
define(AC_FIND_X_DIRECT,
[AC_CHECKING(for X include and library files directly)
-if test ".$x_direct_test_library" = . ; then
- x_direct_test_library='Xt'
-fi
-if test ".$x_direct_test_include" = . ; then
- x_direct_test_include='X11/Intrinsic.h'
-fi
+test -z "$x_direct_test_library" && x_direct_test_library=Xt
+test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
AC_TEST_CPP([#include <$x_direct_test_include>], no_x=,
for ac_dir in \
/usr/X11R6/include \
; \
do
if test -r "$ac_dir/$x_direct_test_include"; then
- test -z "$x_includes" && x_includes=$ac_dir
+ test -z "$ac_cv_x_includes" && ac_cv_x_includes=$ac_dir
no_x=
break
fi
# Check for the libraries. First see if replacing the include by
# lib works.
AC_HAVE_LIBRARY("$x_direct_test_library", no_x=,
-for ac_dir in `echo "$x_includes" | sed s/include/lib/` \
+for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
/usr/X11R6/lib \
/usr/X11R5/lib \
/usr/X11R4/lib \
do
for ac_extension in a so sl; do
if test -r $ac_dir/lib${x_direct_test_library}.$ac_extension; then
- test -z "$x_libraries" && x_libraries=$ac_dir
+ test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=$ac_dir
no_x=
break 2
fi
projects / thirdparty / autoconf.git / commitdiff
