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Correct the use AC_RUN_IFELSE to ensure it builds programs correctly by

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using the AC_LANG_PROGRAM macro.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16426 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2004-09-20 04:08:22 +00:00
parent 2e89ae2894
commit a42b525ea8
2 changed files with 8 additions and 14 deletions
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18
autoconf/m4/func_mmap_file.m4
View File

@@ -6,22 +6,18 @@ AC_DEFUN([AC_FUNC_MMAP_FILE],
ac_cv_func_mmap_file, ac_cv_func_mmap_file,
[ AC_LANG_PUSH([C]) [ AC_LANG_PUSH([C])
AC_RUN_IFELSE([ AC_RUN_IFELSE([
#ifdef HAVE_SYS_TYPES_H AC_LANG_PROGRAM([[
#include <sys/types.h> #include <sys/types.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h> #include <sys/mman.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h> #include <fcntl.h>
#endif ]],[[
int fd; int fd;
int main () { int main () {
fd = creat ("foo",0777); fd = (int) mmap (0, 1, PROT_READ, MAP_SHARED, fd, 0); unlink ("foo"); return (fd != (int) MAP_FAILED);}], fd = creat ("foo",0777);
ac_cv_func_mmap_file=yes, ac_cv_func_mmap_file=no, ac_cv_func_mmap_file=no) fd = (int) mmap (0, 1, PROT_READ, MAP_SHARED, fd, 0);
unlink ("foo");
return (fd != (int) MAP_FAILED);}]])],
[ac_cv_func_mmap_file=yes], [ac_cv_func_mmap_file=no],[])
AC_LANG_POP([C]) AC_LANG_POP([C])
]) ])
if test "$ac_cv_func_mmap_file" = yes; then if test "$ac_cv_func_mmap_file" = yes; then

4
autoconf/m4/link_use_r.m4
View File

@@ -9,7 +9,7 @@ AC_DEFUN([AC_LINK_USE_R],
AC_LANG_PUSH([C]) AC_LANG_PUSH([C])
oldcflags="$CFLAGS" oldcflags="$CFLAGS"
CFLAGS="$CFLAGS -Wl,-R." CFLAGS="$CFLAGS -Wl,-R."
AC_LINK_IFELSE([int main() { return 0; }],[ac_cv_link_use_r=yes],[ac_cv_link_use_r=no]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],[ac_cv_link_use_r=yes],[ac_cv_link_use_r=no])
CFLAGS="$oldcflags" CFLAGS="$oldcflags"
AC_LANG_POP([C]) AC_LANG_POP([C])
AC_MSG_RESULT($ac_cv_link_use_r) AC_MSG_RESULT($ac_cv_link_use_r)
@@ -18,5 +18,3 @@ AC_DEFUN([AC_LINK_USE_R],
AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.]) AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
fi fi
]) ])