[SCM] GNU Autoconf source repository branch, master, updated. v2.68-10-g234d3c3

[Paul Eggert]

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- Log -----------------------------------------------------------------
commit 234d3c32688c335ee19e8d7f409e713badb5c669
Author: Paul Eggert <address@hidden>
Date:   Sat Nov 20 15:26:39 2010 -0800

    autoconf: don't assume sys/stat.h and sys/types.h when testing C89
    
    Problem reported by Patrick Pelissier in
    <http://lists.gnu.org/archive/html/bug-autoconf/2010-11/msg00019.html>.
    * lib/autoconf/c.m4 (_AC_PROG_CC_C89): Don't include sys/types.h
    and sys/stat.h.  Instead, define a dummy struct stat.  C89 doesn't
    guarantee sys/types.h and sys/stat.h.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog         |    9 +++++++++
 lib/autoconf/c.m4 |    3 +--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index e34119c..62358ea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2010-11-20  Paul Eggert  <address@hidden>
+
+       autoconf: don't assume sys/stat.h and sys/types.h when testing C89
+       Problem reported by Patrick Pelissier in
+       <http://lists.gnu.org/archive/html/bug-autoconf/2010-11/msg00019.html>.
+       * lib/autoconf/c.m4 (_AC_PROG_CC_C89): Don't include sys/types.h
+       and sys/stat.h.  Instead, define a dummy struct stat.  C89 doesn't
+       guarantee sys/types.h and sys/stat.h.
+
 2010-11-10  Reuben Thomas  <address@hidden>  (tiny change)
 
        docs: avoid first person, and credit history to David MacKenzie
diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index 233644a..a873ccd 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -1102,8 +1102,7 @@ AC_DEFUN([_AC_PROG_CC_C89],
 [_AC_C_STD_TRY([c89],
 [[#include <stdarg.h>
 #include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
+struct stat;
 /* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
 struct buf { int x; };
 FILE * (*rcsopen) (struct buf *, struct stat *, int);


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