[ --enable-omitfp build undebuggable optimized library [default=no]],
omitfp=$enableval, omitfp=no)
+dnl Some gcc versions have problems with omit-frame-pointer. Warn about this.
+if test $omitfp = yes; then
+ echo "*** Not all versions of GCC compile code correctly when the"
+ echo "*** -fomit-frame-pointer version is used. You are on your own"
+ echo "*** if you use it."
+fi
+
dnl Generic infrastructure for drop-in additions to libc.
AC_ARG_ENABLE(add-ons, dnl
[ --enable-add-ons=DIR... configure and build named extra directories],
host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
;;
esac
+###
+### I put this here to prevent those annoying emails from people who cannot
+### read and try to compile glibc on unsupported platforms. --drepper
+###
+### By using the undocumented --enable-hacker-mode option for configure
+### one can skip this test to make the configuration not fail for unsupported
+### platforms.
+###
+if test -z "$enable_hacker_mode"; then
+ case "$host_os" in
+ linux* | gnu*)
+ ;;
+ *)
+ echo "*** The GNU C library is currently not available for this platform."
+ echo "*** So far nobody cared to port it and if there is no volunteer it"
+ echo "*** might never happen. So, if you have interest to see glibc on"
+ echo "*** this platform visit"
+ echo "*** http://www.gnu.org/software/libc/porting.html"
+ echo "*** and join the group of porters"
+ exit 1
+ ;;
+ esac
+fi
+
# We keep the original values in `$config_*' and never modify them, so we
# can write them unchanged into config.make. Everything else uses
gnu_ld=yes gnu_as=yes ;;
esac
case "$host_os" in
-linux*ecoff*)
+# i586-linuxaout is mangled into i586-pc-linux-gnuaout
+linux*ecoff* | linux*aout* | gnu*aout* | gnu*ecoff*)
;;
gnu* | linux* | sysv4* | solaris2*)
# These systems (almost) always use the ELF format.
AC_PROG_INSTALL
if test "$INSTALL" = "${srcdir}/install-sh -c"; then
# The makefiles need to use a different form to find it in $srcdir.
- INSTALL='$(..)./install-sh -c'
+ INSTALL='\$(..)./install-sh -c'
fi
AC_PROG_LN_S
AC_CHECK_PROGS(MSGFMT, msgfmt gmsgfmt, :)
asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives."
fi
+# gcc 2.7.x has a bug where if -pipe is set, the assembler will always
+# be told to read stdin. This causes the compiler to hang when fed an
+# .s file.
+if test $ac_cv_prog_gcc = yes; then
+ case `${CC-cc} -v 2>&1` in
+ *2.7*)
+ # We must check this even if -pipe is not given here, because the user
+ # might do `make CFLAGS=-pipe'.
+ AC_CACHE_CHECK(for gcc 2.7.x -pipe bug, libc_cv_gcc_pipe_bug, [dnl
+ cp /dev/null conftest.s
+ cat >conftest1.s <<EOF
+.nosuchdirective
+EOF
+ if ${CC-cc} -pipe -c conftest.s <conftest1.s 2>/dev/null; then
+ libc_cv_gcc_pipe_bug=no
+ else
+ libc_cv_gcc_pipe_bug=yes
+ fi
+ rm -f conftest*])
+ if test $libc_cv_gcc_pipe_bug = yes; then
+ makeCC="${CC-cc} -B\$(common-objpfx)"
+ makeCFLAGS=$CFLAGS
+ CFLAGS=`echo $CFLAGS |sed 's/-pipe//'`
+ fi;;
+ *) libc_cv_gcc_pipe_bug=no;;
+ esac
+else
+ libc_cv_gcc_pipe_bug=no
+fi
+
+
AC_CACHE_CHECK(for assembler global-symbol directive,
libc_cv_asm_global_directive, [dnl
libc_cv_asm_global_directive=UNKNOWN
cat > conftest.s <<EOF
.text
${ac_globl} foo
-foo: .long 0
+foo:
EOF
if ${CC-cc} $CFLAGS -c conftest.s 2>/dev/null; then
libc_cv_asm_global_directive=${ac_globl}
fi
fi
+dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
+AC_DEFUN(AC_CHECK_ASM_UNDERSCORE,
+[cat > conftest.$ac_ext <<EOF
+dnl This sometimes fails to find confdefs.h, for some reason.
+dnl [#]line __oline__ "[$]0"
+[#]line __oline__ "configure"
+#include "confdefs.h"
+void underscore_test(void) {
+return; }
+EOF
+if AC_TRY_EVAL(ac_compile); then
+ if grep _underscore_test conftest* >/dev/null; then
+ ifelse([$1], , :, [rm -f conftest*
+ $1])
+ else
+ ifelse([$2], , , [rm -f conftest*
+ $2])
+ fi
+else
+ echo "configure: failed program was:" >&AC_FD_CC
+ cat conftest.$ac_ext >&AC_FD_CC
+ ifelse([$2], , , [rm -f conftest*
+ $2])
+fi
+rm -f conftest*])
+
if test $elf = yes; then
libc_cv_asm_underscores=no
else
- AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
- [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
- libc_cv_asm_underscores=yes,
- libc_cv_asm_underscores=no)])
+ if test $ac_cv_prog_cc_works = yes; then
+ AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
+ [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();],
+ libc_cv_asm_underscores=yes,
+ libc_cv_asm_underscores=no)])
+ else
+ AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores,
+ [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes,
+ libc_cv_asm_underscores=no)])
+ fi
fi
if test $libc_cv_asm_underscores = no; then
AC_DEFINE(NO_UNDERSCORES)
cat > conftest.s <<EOF
.text
${libc_cv_asm_global_directive} foo
-foo: .long 0
+foo:
.weak foo
.weak bar; bar = foo
EOF
cat > conftest.s <<EOF
.text
${libc_cv_asm_global_directive} foo
-foo: .long 0
+foo:
.weakext foo
.weakext foo, bar
EOF
VERSION=`sed -e 's/^#define VERSION "\([^"]*\)"/\1/p' -e d < $srcdir/version.h`
AC_SUBST(VERSION)
+if test $libc_cv_gcc_pipe_bug = yes; then
+ realCC=$CC
+ CC=$makeCC
+ CFLAGS=$makeCFLAGS
+fi
+AC_OUTPUT_COMMANDS([
+if test "$realCC"; then
+ sed -e 's/%{pipe:-}/%|/g' `$realCC -print-file-name=specs` >specsT
+ mv specsT specs
+fi], [realCC=$realCC])
+
AC_OUTPUT(config.make glibcbug ${config_makefile} ${config_uname}, ,
[echo '$config_vars' >> config.make])
with names like @file{@var{program}.out}.
To format the @cite{GNU C Library Reference Manual} for printing, type
-@w{@code{make dvi}}.
+@w{@code{make dvi}}. You need a working TeX installation to do this.
To install the library and its header files, and the Info files of the
manual, type @code{make install}. This will build things if necessary,
-before installing them.@refill
+before installing them. If you want to install the files in a different
+place than the one specified at configuration time you can specify a
+value for the Makefile variable @code{install_root} on the command line.
+This is useful to create chroot'ed environment or to prepare binary
+releases.@refill
@node Tools for Installation
@appendixsubsec Recommended Tools to Install the GNU C Library
You need the latest version of GNU @code{make}. Modifying the GNU C
Library to work with other @code{make} programs would be so hard that we
recommend you port GNU @code{make} instead. @strong{Really.}
-We recommend version GNU @code{make} version 3.75 or later.
+We recommend version GNU @code{make} version 3.75. Versions 3.76 and
+3.76.1 are known to have bugs which only show up in big projects like
+GNU @code{libc}.
@item
GCC 2.7.2
have problems.
@item
-@code{binutils} 2.8
+@code{binutils} 2.8.1
Using the GNU @code{binutils} (assembler, linker, and related tools) is
preferable when possible, and they are required to build an ELF shared C
library. We recommend @code{binutils} version 2.8 or later; earlier
versions are known to have problems or to not support all architectures.
+
+@item
+@code{texinfo} 3.11
+
+To correctly translate and install the Texinfo documentation you need
+this version of the @code{texinfo} package. Former versions did not
+understand all the tags used in the document and also the installation
+mechanisms for the info files was not present or worked differently.
+
+On some Debian Linux based systems the used @code{install-info} program
+works differently. Here you have to run make like this:
+
+@smallexample
+make INSTALL_INFO=/path/to/GNU/install-info install
+@end smallexample
@end itemize
@node Supported Configurations
@smallexample
alpha-dec-osf1
-alpha-@var{anything}-linuxecoff
i@var{x}86-@var{anything}-bsd4.3
i@var{x}86-@var{anything}-isc2.2
i@var{x}86-@var{anything}-isc3.@var{n}
projects / thirdparty / glibc.git / commitdiff
