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authorJim Meyering <jim@meyering.net>1998-11-08 03:42:20 +0000
committerJim Meyering <jim@meyering.net>1998-11-08 03:42:20 +0000
commit2daa912c5383df4907ebedcbde6829b3d2772d10 (patch)
tree30215cdd3e3fd8e9ca139953c6ddf225cb89df6c /m4
parent7bf8c634eb6328118caf09d12af7129279d2217f (diff)
downloadcoreutils-2daa912c5383df4907ebedcbde6829b3d2772d10.tar.xz
Rewrite to set HAVE_STAT_EMPTY_STRING_BUG.
Diffstat (limited to 'm4')
-rw-r--r--m4/stat.m445
1 files changed, 29 insertions, 16 deletions
diff --git a/m4/stat.m4 b/m4/stat.m4
index 6ac3e02e3..c6070dcdd 100644
--- a/m4/stat.m4
+++ b/m4/stat.m4
@@ -1,20 +1,18 @@
-#serial 1
+#serial 2
dnl From Jim Meyering.
-dnl Determine whether stat has the bug that it succeeds when given the
-dnl zero-length file name argument. The stat from SunOS4.1.4 does this.
+dnl Determine whether stat has the `bug' that it succeeds when given the
+dnl zero-length file name argument. The stat from SunOS4.1.4 and the Hurd
+dnl (as of 1998-11-01) does this. This behavior is allowed by POSIX.
dnl
-dnl If it doesn't, arrange to use the replacement function.
-dnl
-dnl If you use this macro in a package, you should
-dnl add the following two lines to acconfig.h:
-dnl /* Define to rpl_stat if the replacement function should be used. */
-dnl #undef stat
+dnl If it does, then define HAVE_STAT_EMPTY_STRING_BUG and arrange to
+dnl compile the wrapper function.
dnl
AC_DEFUN(jm_FUNC_STAT,
[
- AC_CACHE_CHECK([for working stat], jm_cv_func_working_stat,
+ AC_CACHE_CHECK([whether stat accepts an empty string],
+ jm_cv_func_stat_empty_string_bug,
[AC_TRY_RUN([
# include <sys/types.h>
# include <sys/stat.h>
@@ -23,16 +21,31 @@ AC_DEFUN(jm_FUNC_STAT,
main ()
{
struct stat sbuf;
- exit (stat ("", &sbuf) == 0 ? 1 : 0);
+ exit (stat ("", &sbuf) ? 1 : 0);
}
],
- jm_cv_func_working_stat=yes,
- jm_cv_func_working_stat=no,
+ jm_cv_func_stat_empty_string_bug=yes,
+ jm_cv_func_stat_empty_string_bug=no,
dnl When crosscompiling, assume stat is broken.
- jm_cv_func_working_stat=no)
+ jm_cv_func_stat_empty_string_bug=yes)
])
- if test $jm_cv_func_working_stat = no; then
+ if test $jm_cv_func_stat_empty_string_bug = yes; then
+
LIBOBJS="$LIBOBJS stat.o"
- AC_DEFINE_UNQUOTED(stat, rpl_stat)
+
+ if test $jm_cv_func_stat_empty_string_bug = yes; then
+ if test x = y; then
+ # This code is deliberately never run via ./configure.
+ # FIXME: this is a hack to make autoheader put the corresponding
+ # HAVE_* undef for this symbol in config.h.in. This saves me the
+ # trouble of having to maintain the #undef in acconfig.h manually.
+ AC_CHECK_FUNCS(STAT_EMPTY_STRING_BUG)
+ fi
+ # Defining it this way (rather than via AC_DEFINE) short-circuits the
+ # autoheader check -- autoheader doesn't know it's already been taken
+ # care of by the hack above.
+ ac_kludge=HAVE_STAT_EMPTY_STRING_BUG
+ AC_DEFINE_UNQUOTED($ac_kludge)
+ fi
fi
])