Re: touch gets stuck for named pipes

[Paolo Bonzini]

> This is the main problem: autoconf guessed wrong. The AC_FUNC_UTIME_NULL macro
> is already obsolete for 3 years:
> 
>  -- Macro: AC_FUNC_UTIME_NULL
>      If `utime (FILE, NULL)' sets FILE's timestamp to the present,
>      define `HAVE_UTIME_NULL'.
> 
>      This macro is obsolescent, as all current systems have a `utime'
>      that behaves this way.  New programs need not use this macro.

I think that then _this_ is the cross-compilation default to be fixed.

Ok?

Paolo

2009-04-09  Paolo Bonzini  <address@hidden>

        * lib/autoconf/functions.m4 (AC_FUNC_UTIME_NULL): Assume
        not crosscompiling to an obsolete system.

diff --git a/lib/autoconf/functions.m4 b/lib/autoconf/functions.m4
index aaf961b..3967d43 100644
--- a/lib/autoconf/functions.m4
+++ b/lib/autoconf/functions.m4
@@ -1757,7 +1757,7 @@ AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
            && t.st_mtime - s.st_mtime < 120);]])],
              ac_cv_func_utime_null=yes,
              ac_cv_func_utime_null=no,
-             ac_cv_func_utime_null=no)])
+             ac_cv_func_utime_null=yes)])
 if test $ac_cv_func_utime_null = yes; then
   AC_DEFINE(HAVE_UTIME_NULL, 1,
            [Define to 1 if `utime(file, NULL)' sets file's timestamp to the