* Serious Problems
-** Broken compilers
-
-configure does not properly diagnose broken compilers (because it
-finds the failure before the code that checks whether the compiler
-works). It is not to serious a bug, but most notably the test suite
-will fail to handle gracefully missing compilers (typically the
-Fortran compiler).
-
** Special characters and config.hin
The handling of special characters, most notable backslashes, of
+2001-02-19 Akim Demaille <akim@epita.fr>
+
+ * aclang.m4 (_AC_LANG_COMPILER_WORKS): Rename as...
+ (_AC_COMPILER_EXEEXT_WORKS): this. Use the `a.out' or `a.exe'
+ left by _AC_COMPILER_EXEEXT_DEFAULT to check if the compiler works.
+ (_AC_COMPILER_EXEEXT_CROSS): Extract from the above macro.
+ (_AC_COMPILER_EXEEXT): Use them.
+ Adjust all the compiler looking macros to check for EXEEXT
+ *first*, then OBJEXT.
+ Set ac_exeext yourself.
+ (_AC_COMPILER_EXEEXT_O): Don't.
+
2001-02-07 Pavel Roskin <proski@gnu.org>
* tests/atspecific.m4 (AT_CONFIGURE_AC): Double quote constant
[AC_LANG_COMPILER])])
-# _AC_LANG_COMPILER_WORKS
-# -----------------------
-m4_define([_AC_LANG_COMPILER_WORKS],
-[AC_MSG_CHECKING([whether the _AC_LANG compiler works])
-_AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-[# FIXME: these cross compiler hacks should be removed for autoconf 3.0
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
- if AC_TRY_COMMAND(./conftest$ac_exeext); then
- cross_compiling=no
- else
- if test "$cross_compiling" = maybe; then
- cross_compiling=yes
- else
- AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
-To enable cross compilation, use `--host'.])
- fi
- fi
-fi
-AC_MSG_RESULT([yes])],
-[AC_MSG_RESULT([no])
-AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
-AC_MSG_CHECKING([whether we are cross compiling])
-AC_MSG_RESULT([$cross_compiling])
-])# _AC_LANG_COMPILER_WORKS
-
# _AC_LANG_COMPILER_GNU
# ---------------------
# _AC_COMPILER_EXEEXT_DEFAULT
# ---------------------------
# Check for the extension used for the default name for executables.
-# Beware of `expr' that may return `0' or `'.
+# Beware of `expr' that may return `0' or `'. Since this macro is
+# the first one in touch with the compiler, it should also check that
+# it compiles properly.
m4_define([_AC_COMPILER_EXEEXT_DEFAULT],
-[# Try without -o first, disregard a.out.
+[# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compiler, and finding out an intuition
+# of exeext.
+AC_MSG_CHECKING([for _AC_LANG compiler default output])
ac_link_default=`echo "$ac_link" | sed ['s/ -o *conftest[^ ]*//']`
AS_IF([AC_TRY_EVAL(ac_link_default)],
[for ac_file in `ls a.exe conftest.exe a.* conftest conftest.* 2>/dev/null`; do
case $ac_file in
- *.$ac_ext | *.out | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ a.out ) # We found the default executable, but exeext='' is most
+ # certainly right.
+ break;;
*.* ) ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
export ac_cv_exeext
break;;
esac
done],
[echo "$as_me: failed program was:" >&AS_MESSAGE_LOG_FD
-cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD])
-rm -f a.out a.exe conftest$ac_cv_exeext
+cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
+AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
+ac_exeext=$ac_cv_exeext
+AC_MSG_RESULT([$ac_file])
])# _AC_COMPILER_EXEEXT_DEFAULT
+# _AC_COMPILER_EXEEXT_WORKS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_WORKS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether the _AC_LANG compiler works])
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+ if AC_TRY_COMMAND([./$ac_file]); then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
+If you meant to cross compile, use `--host'.])
+ fi
+ fi
+fi
+AC_MSG_RESULT([yes])
+])# _AC_COMPILER_EXEEXT_WORKS
+
+
+# _AC_COMPILER_EXEEXT_CROSS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_CROSS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether we are cross compiling])
+AC_MSG_RESULT([$cross_compiling])
+])# _AC_COMPILER_EXEEXT_CROSS
+
+
# _AC_COMPILER_EXEEXT_O
# ---------------------
# Check for the extension used when `-o foo'. Try to see if ac_cv_exeext,
# as computed by _AC_COMPILER_EXEEXT_DEFAULT is OK.
m4_define([_AC_COMPILER_EXEEXT_O],
-[# We have not set ac_exeext yet which is needed by `ac_link'.
-ac_exeext=$ac_cv_exeext
+[AC_MSG_CHECKING([for executable suffix])
AS_IF([AC_TRY_EVAL(ac_link)],
[# If both `conftest.exe' and `conftest' are `present' (well, observable)
# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
esac
done],
[AC_MSG_ERROR([cannot compute EXEEXT: cannot compile and link])])
-rm -f conftest.$ac_ext conftest$ac_cv_exeext
+rm -f conftest$ac_cv_exeext
+AC_MSG_RESULT([$ac_cv_exeext])
])# _AC_COMPILER_EXEEXT_O
# Note that some compilers (cross or not), strictly obey to `-o foo' while
# the host requires `foo.exe', so we should not depend upon `-o' to
# test EXEEXT. But then, be sure no to destroy user files.
+#
+# Must be run before _AC_COMPILER_OBJEXT because _AC_COMPILER_EXEEXT_DEFAULT
+# checks whether the compiler works.
m4_define([_AC_COMPILER_EXEEXT],
-[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
- [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe"
_AC_COMPILER_EXEEXT_DEFAULT
-_AC_COMPILER_EXEEXT_O])
+_AC_COMPILER_EXEEXT_WORKS
+rm -f a.out a.exe conftest$ac_cv_exeext
+ac_clean_files=$ac_clean_files_save
+_AC_COMPILER_EXEEXT_CROSS
+_AC_COMPILER_EXEEXT_O
+rm -f conftest.$ac_ext
AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
])# _AC_COMPILER_EXEEXT
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GCC=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CC_G
[g++ c++ gpp aCC CC cxx cc++ cl KCC RCC xlC_r xlC])],
g++)
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GXX=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CXX_G
[m4_default([$1],
[g77 f77 xlf cf77 cft77 pgf77 fl32 af77 fort77 f90 xlf90 pgf90 epcf90 f95 xlf95 lf95 g95 fc])])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
# If we don't use `.F' as extension, the preprocessor is not run on the
# input file.
ac_save_ext=$ac_ext
[AC_LANG_COMPILER])])
-# _AC_LANG_COMPILER_WORKS
-# -----------------------
-m4_define([_AC_LANG_COMPILER_WORKS],
-[AC_MSG_CHECKING([whether the _AC_LANG compiler works])
-_AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-[# FIXME: these cross compiler hacks should be removed for autoconf 3.0
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
- if AC_TRY_COMMAND(./conftest$ac_exeext); then
- cross_compiling=no
- else
- if test "$cross_compiling" = maybe; then
- cross_compiling=yes
- else
- AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
-To enable cross compilation, use `--host'.])
- fi
- fi
-fi
-AC_MSG_RESULT([yes])],
-[AC_MSG_RESULT([no])
-AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
-AC_MSG_CHECKING([whether we are cross compiling])
-AC_MSG_RESULT([$cross_compiling])
-])# _AC_LANG_COMPILER_WORKS
-
# _AC_LANG_COMPILER_GNU
# ---------------------
# _AC_COMPILER_EXEEXT_DEFAULT
# ---------------------------
# Check for the extension used for the default name for executables.
-# Beware of `expr' that may return `0' or `'.
+# Beware of `expr' that may return `0' or `'. Since this macro is
+# the first one in touch with the compiler, it should also check that
+# it compiles properly.
m4_define([_AC_COMPILER_EXEEXT_DEFAULT],
-[# Try without -o first, disregard a.out.
+[# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compiler, and finding out an intuition
+# of exeext.
+AC_MSG_CHECKING([for _AC_LANG compiler default output])
ac_link_default=`echo "$ac_link" | sed ['s/ -o *conftest[^ ]*//']`
AS_IF([AC_TRY_EVAL(ac_link_default)],
[for ac_file in `ls a.exe conftest.exe a.* conftest conftest.* 2>/dev/null`; do
case $ac_file in
- *.$ac_ext | *.out | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ a.out ) # We found the default executable, but exeext='' is most
+ # certainly right.
+ break;;
*.* ) ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
export ac_cv_exeext
break;;
esac
done],
[echo "$as_me: failed program was:" >&AS_MESSAGE_LOG_FD
-cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD])
-rm -f a.out a.exe conftest$ac_cv_exeext
+cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
+AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
+ac_exeext=$ac_cv_exeext
+AC_MSG_RESULT([$ac_file])
])# _AC_COMPILER_EXEEXT_DEFAULT
+# _AC_COMPILER_EXEEXT_WORKS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_WORKS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether the _AC_LANG compiler works])
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+ if AC_TRY_COMMAND([./$ac_file]); then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
+If you meant to cross compile, use `--host'.])
+ fi
+ fi
+fi
+AC_MSG_RESULT([yes])
+])# _AC_COMPILER_EXEEXT_WORKS
+
+
+# _AC_COMPILER_EXEEXT_CROSS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_CROSS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether we are cross compiling])
+AC_MSG_RESULT([$cross_compiling])
+])# _AC_COMPILER_EXEEXT_CROSS
+
+
# _AC_COMPILER_EXEEXT_O
# ---------------------
# Check for the extension used when `-o foo'. Try to see if ac_cv_exeext,
# as computed by _AC_COMPILER_EXEEXT_DEFAULT is OK.
m4_define([_AC_COMPILER_EXEEXT_O],
-[# We have not set ac_exeext yet which is needed by `ac_link'.
-ac_exeext=$ac_cv_exeext
+[AC_MSG_CHECKING([for executable suffix])
AS_IF([AC_TRY_EVAL(ac_link)],
[# If both `conftest.exe' and `conftest' are `present' (well, observable)
# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
esac
done],
[AC_MSG_ERROR([cannot compute EXEEXT: cannot compile and link])])
-rm -f conftest.$ac_ext conftest$ac_cv_exeext
+rm -f conftest$ac_cv_exeext
+AC_MSG_RESULT([$ac_cv_exeext])
])# _AC_COMPILER_EXEEXT_O
# Note that some compilers (cross or not), strictly obey to `-o foo' while
# the host requires `foo.exe', so we should not depend upon `-o' to
# test EXEEXT. But then, be sure no to destroy user files.
+#
+# Must be run before _AC_COMPILER_OBJEXT because _AC_COMPILER_EXEEXT_DEFAULT
+# checks whether the compiler works.
m4_define([_AC_COMPILER_EXEEXT],
-[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
- [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe"
_AC_COMPILER_EXEEXT_DEFAULT
-_AC_COMPILER_EXEEXT_O])
+_AC_COMPILER_EXEEXT_WORKS
+rm -f a.out a.exe conftest$ac_cv_exeext
+ac_clean_files=$ac_clean_files_save
+_AC_COMPILER_EXEEXT_CROSS
+_AC_COMPILER_EXEEXT_O
+rm -f conftest.$ac_ext
AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
])# _AC_COMPILER_EXEEXT
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GCC=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CC_G
[g++ c++ gpp aCC CC cxx cc++ cl KCC RCC xlC_r xlC])],
g++)
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GXX=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CXX_G
[m4_default([$1],
[g77 f77 xlf cf77 cft77 pgf77 fl32 af77 fort77 f90 xlf90 pgf90 epcf90 f95 xlf95 lf95 g95 fc])])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
# If we don't use `.F' as extension, the preprocessor is not run on the
# input file.
ac_save_ext=$ac_ext
[AC_LANG_COMPILER])])
-# _AC_LANG_COMPILER_WORKS
-# -----------------------
-m4_define([_AC_LANG_COMPILER_WORKS],
-[AC_MSG_CHECKING([whether the _AC_LANG compiler works])
-_AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-[# FIXME: these cross compiler hacks should be removed for autoconf 3.0
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
- if AC_TRY_COMMAND(./conftest$ac_exeext); then
- cross_compiling=no
- else
- if test "$cross_compiling" = maybe; then
- cross_compiling=yes
- else
- AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
-To enable cross compilation, use `--host'.])
- fi
- fi
-fi
-AC_MSG_RESULT([yes])],
-[AC_MSG_RESULT([no])
-AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
-AC_MSG_CHECKING([whether we are cross compiling])
-AC_MSG_RESULT([$cross_compiling])
-])# _AC_LANG_COMPILER_WORKS
-
# _AC_LANG_COMPILER_GNU
# ---------------------
# _AC_COMPILER_EXEEXT_DEFAULT
# ---------------------------
# Check for the extension used for the default name for executables.
-# Beware of `expr' that may return `0' or `'.
+# Beware of `expr' that may return `0' or `'. Since this macro is
+# the first one in touch with the compiler, it should also check that
+# it compiles properly.
m4_define([_AC_COMPILER_EXEEXT_DEFAULT],
-[# Try without -o first, disregard a.out.
+[# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compiler, and finding out an intuition
+# of exeext.
+AC_MSG_CHECKING([for _AC_LANG compiler default output])
ac_link_default=`echo "$ac_link" | sed ['s/ -o *conftest[^ ]*//']`
AS_IF([AC_TRY_EVAL(ac_link_default)],
[for ac_file in `ls a.exe conftest.exe a.* conftest conftest.* 2>/dev/null`; do
case $ac_file in
- *.$ac_ext | *.out | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ a.out ) # We found the default executable, but exeext='' is most
+ # certainly right.
+ break;;
*.* ) ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
export ac_cv_exeext
break;;
esac
done],
[echo "$as_me: failed program was:" >&AS_MESSAGE_LOG_FD
-cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD])
-rm -f a.out a.exe conftest$ac_cv_exeext
+cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
+AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
+ac_exeext=$ac_cv_exeext
+AC_MSG_RESULT([$ac_file])
])# _AC_COMPILER_EXEEXT_DEFAULT
+# _AC_COMPILER_EXEEXT_WORKS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_WORKS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether the _AC_LANG compiler works])
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+ if AC_TRY_COMMAND([./$ac_file]); then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
+If you meant to cross compile, use `--host'.])
+ fi
+ fi
+fi
+AC_MSG_RESULT([yes])
+])# _AC_COMPILER_EXEEXT_WORKS
+
+
+# _AC_COMPILER_EXEEXT_CROSS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_CROSS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether we are cross compiling])
+AC_MSG_RESULT([$cross_compiling])
+])# _AC_COMPILER_EXEEXT_CROSS
+
+
# _AC_COMPILER_EXEEXT_O
# ---------------------
# Check for the extension used when `-o foo'. Try to see if ac_cv_exeext,
# as computed by _AC_COMPILER_EXEEXT_DEFAULT is OK.
m4_define([_AC_COMPILER_EXEEXT_O],
-[# We have not set ac_exeext yet which is needed by `ac_link'.
-ac_exeext=$ac_cv_exeext
+[AC_MSG_CHECKING([for executable suffix])
AS_IF([AC_TRY_EVAL(ac_link)],
[# If both `conftest.exe' and `conftest' are `present' (well, observable)
# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
esac
done],
[AC_MSG_ERROR([cannot compute EXEEXT: cannot compile and link])])
-rm -f conftest.$ac_ext conftest$ac_cv_exeext
+rm -f conftest$ac_cv_exeext
+AC_MSG_RESULT([$ac_cv_exeext])
])# _AC_COMPILER_EXEEXT_O
# Note that some compilers (cross or not), strictly obey to `-o foo' while
# the host requires `foo.exe', so we should not depend upon `-o' to
# test EXEEXT. But then, be sure no to destroy user files.
+#
+# Must be run before _AC_COMPILER_OBJEXT because _AC_COMPILER_EXEEXT_DEFAULT
+# checks whether the compiler works.
m4_define([_AC_COMPILER_EXEEXT],
-[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
- [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe"
_AC_COMPILER_EXEEXT_DEFAULT
-_AC_COMPILER_EXEEXT_O])
+_AC_COMPILER_EXEEXT_WORKS
+rm -f a.out a.exe conftest$ac_cv_exeext
+ac_clean_files=$ac_clean_files_save
+_AC_COMPILER_EXEEXT_CROSS
+_AC_COMPILER_EXEEXT_O
+rm -f conftest.$ac_ext
AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
])# _AC_COMPILER_EXEEXT
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GCC=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CC_G
[g++ c++ gpp aCC CC cxx cc++ cl KCC RCC xlC_r xlC])],
g++)
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GXX=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CXX_G
[m4_default([$1],
[g77 f77 xlf cf77 cft77 pgf77 fl32 af77 fort77 f90 xlf90 pgf90 epcf90 f95 xlf95 lf95 g95 fc])])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
# If we don't use `.F' as extension, the preprocessor is not run on the
# input file.
ac_save_ext=$ac_ext
[AC_LANG_COMPILER])])
-# _AC_LANG_COMPILER_WORKS
-# -----------------------
-m4_define([_AC_LANG_COMPILER_WORKS],
-[AC_MSG_CHECKING([whether the _AC_LANG compiler works])
-_AC_LINK_IFELSE([AC_LANG_PROGRAM()],
-[# FIXME: these cross compiler hacks should be removed for autoconf 3.0
-# If not cross compiling, check that we can run a simple program.
-if test "$cross_compiling" != yes; then
- if AC_TRY_COMMAND(./conftest$ac_exeext); then
- cross_compiling=no
- else
- if test "$cross_compiling" = maybe; then
- cross_compiling=yes
- else
- AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
-To enable cross compilation, use `--host'.])
- fi
- fi
-fi
-AC_MSG_RESULT([yes])],
-[AC_MSG_RESULT([no])
-AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
-AC_MSG_CHECKING([whether we are cross compiling])
-AC_MSG_RESULT([$cross_compiling])
-])# _AC_LANG_COMPILER_WORKS
-
# _AC_LANG_COMPILER_GNU
# ---------------------
# _AC_COMPILER_EXEEXT_DEFAULT
# ---------------------------
# Check for the extension used for the default name for executables.
-# Beware of `expr' that may return `0' or `'.
+# Beware of `expr' that may return `0' or `'. Since this macro is
+# the first one in touch with the compiler, it should also check that
+# it compiles properly.
m4_define([_AC_COMPILER_EXEEXT_DEFAULT],
-[# Try without -o first, disregard a.out.
+[# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compiler, and finding out an intuition
+# of exeext.
+AC_MSG_CHECKING([for _AC_LANG compiler default output])
ac_link_default=`echo "$ac_link" | sed ['s/ -o *conftest[^ ]*//']`
AS_IF([AC_TRY_EVAL(ac_link_default)],
[for ac_file in `ls a.exe conftest.exe a.* conftest conftest.* 2>/dev/null`; do
case $ac_file in
- *.$ac_ext | *.out | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ *.$ac_ext | *.o | *.obj | *.xcoff | *.tds | *.d | *.pdb ) ;;
+ a.out ) # We found the default executable, but exeext='' is most
+ # certainly right.
+ break;;
*.* ) ac_cv_exeext=`expr "$ac_file" : ['[^.]*\(\..*\)']`
export ac_cv_exeext
break;;
esac
done],
[echo "$as_me: failed program was:" >&AS_MESSAGE_LOG_FD
-cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD])
-rm -f a.out a.exe conftest$ac_cv_exeext
+cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
+AC_MSG_ERROR([_AC_LANG compiler cannot create executables], 77)])
+ac_exeext=$ac_cv_exeext
+AC_MSG_RESULT([$ac_file])
])# _AC_COMPILER_EXEEXT_DEFAULT
+# _AC_COMPILER_EXEEXT_WORKS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_WORKS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether the _AC_LANG compiler works])
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+ if AC_TRY_COMMAND([./$ac_file]); then
+ cross_compiling=no
+ else
+ if test "$cross_compiling" = maybe; then
+ cross_compiling=yes
+ else
+ AC_MSG_ERROR([cannot run _AC_LANG compiled programs.
+If you meant to cross compile, use `--host'.])
+ fi
+ fi
+fi
+AC_MSG_RESULT([yes])
+])# _AC_COMPILER_EXEEXT_WORKS
+
+
+# _AC_COMPILER_EXEEXT_CROSS
+# -------------------------
+m4_define([_AC_COMPILER_EXEEXT_CROSS],
+[# Check the compiler produces executables we can run. If not, either
+# the compiler is broken, or we cross compile.
+AC_MSG_CHECKING([whether we are cross compiling])
+AC_MSG_RESULT([$cross_compiling])
+])# _AC_COMPILER_EXEEXT_CROSS
+
+
# _AC_COMPILER_EXEEXT_O
# ---------------------
# Check for the extension used when `-o foo'. Try to see if ac_cv_exeext,
# as computed by _AC_COMPILER_EXEEXT_DEFAULT is OK.
m4_define([_AC_COMPILER_EXEEXT_O],
-[# We have not set ac_exeext yet which is needed by `ac_link'.
-ac_exeext=$ac_cv_exeext
+[AC_MSG_CHECKING([for executable suffix])
AS_IF([AC_TRY_EVAL(ac_link)],
[# If both `conftest.exe' and `conftest' are `present' (well, observable)
# catch `conftest.exe'. For instance with Cygwin, `ls conftest' will
esac
done],
[AC_MSG_ERROR([cannot compute EXEEXT: cannot compile and link])])
-rm -f conftest.$ac_ext conftest$ac_cv_exeext
+rm -f conftest$ac_cv_exeext
+AC_MSG_RESULT([$ac_cv_exeext])
])# _AC_COMPILER_EXEEXT_O
# Note that some compilers (cross or not), strictly obey to `-o foo' while
# the host requires `foo.exe', so we should not depend upon `-o' to
# test EXEEXT. But then, be sure no to destroy user files.
+#
+# Must be run before _AC_COMPILER_OBJEXT because _AC_COMPILER_EXEEXT_DEFAULT
+# checks whether the compiler works.
m4_define([_AC_COMPILER_EXEEXT],
-[AC_CACHE_CHECK([for executable suffix], ac_cv_exeext,
- [AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe"
_AC_COMPILER_EXEEXT_DEFAULT
-_AC_COMPILER_EXEEXT_O])
+_AC_COMPILER_EXEEXT_WORKS
+rm -f a.out a.exe conftest$ac_cv_exeext
+ac_clean_files=$ac_clean_files_save
+_AC_COMPILER_EXEEXT_CROSS
+_AC_COMPILER_EXEEXT_O
+rm -f conftest.$ac_ext
AC_SUBST([EXEEXT], [$ac_cv_exeext])dnl
ac_exeext=$EXEEXT
])# _AC_COMPILER_EXEEXT
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GCC=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CC_G
[g++ c++ gpp aCC CC cxx cc++ cl KCC RCC xlC_r xlC])],
g++)
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
_AC_LANG_COMPILER_GNU
GXX=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CXX_G
[m4_default([$1],
[g77 f77 xlf cf77 cft77 pgf77 fl32 af77 fort77 f90 xlf90 pgf90 epcf90 f95 xlf95 lf95 g95 fc])])
-m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
-_AC_LANG_COMPILER_WORKS
+m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
# If we don't use `.F' as extension, the preprocessor is not run on the
# input file.
ac_save_ext=$ac_ext
'o' | 'obj' ) ;;
* ) AC_MSG_ERROR([suspicious object suffix: $ac_objext]);;
esac
+AS_EXIT([0])
]])
]])
AT_CHECK_AUTOCONF
-AT_CHECK_CONFIGURE([], 77)
+AT_CHECK_CONFIGURE([], 77, ignore, ignore)
AT_CLEANUP
projects / thirdparty / autoconf.git / commitdiff
