diff options
Diffstat (limited to 'm4/utimes-null.m4')
| -rw-r--r-- | m4/utimes-null.m4 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/m4/utimes-null.m4 b/m4/utimes-null.m4 new file mode 100644 index 0000000..8d5c8ae --- /dev/null +++ b/m4/utimes-null.m4 @@ -0,0 +1,41 @@ +#serial 7 + +# Copyright (C) 1998, 1999, 2001, 2003, 2004, 2006 Free Software +# Foundation, Inc. + +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +dnl Shamelessly cloned from acspecific.m4's AC_FUNC_UTIME_NULL, +dnl then do case-insensitive s/utime/utimes/. + +AC_DEFUN([gl_FUNC_UTIMES_NULL], +[AC_CACHE_CHECK(whether utimes accepts a null argument, ac_cv_func_utimes_null, +[rm -f conftest.data; > conftest.data +AC_TRY_RUN([ +/* In case stat has been defined to rpl_stat, undef it here. */ +#undef stat +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/time.h> +int +main () { +struct stat s, t; +return ! (stat ("conftest.data", &s) == 0 + && utimes ("conftest.data", 0) == 0 + && stat ("conftest.data", &t) == 0 + && t.st_mtime >= s.st_mtime + && t.st_mtime - s.st_mtime < 120)); +}], + ac_cv_func_utimes_null=yes, + ac_cv_func_utimes_null=no, + ac_cv_func_utimes_null=no) +rm -f core core.* *.core]) + + if test $ac_cv_func_utimes_null = yes; then + AC_DEFINE(HAVE_UTIMES_NULL, 1, + [Define if utimes accepts a null argument]) + fi + ] +) |