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author | Jim Meyering <jim@meyering.net> | 1998-07-25 13:16:38 +0000 |
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committer | Jim Meyering <jim@meyering.net> | 1998-07-25 13:16:38 +0000 |
commit | 27f3ca3d5af92f583b6d94c4ada33e7dabc7a8fd (patch) | |
tree | 750135972045e1d7c4c51bd8c1e4614419cc1aaf /m4/utimes.m4 | |
parent | f1a7e03bbe8788acd5755ec6e257776d8054ccd3 (diff) | |
download | coreutils-27f3ca3d5af92f583b6d94c4ada33e7dabc7a8fd.tar.xz |
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Diffstat (limited to 'm4/utimes.m4')
-rw-r--r-- | m4/utimes.m4 | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/m4/utimes.m4 b/m4/utimes.m4 new file mode 100644 index 000000000..ddb3aeaee --- /dev/null +++ b/m4/utimes.m4 @@ -0,0 +1,34 @@ +#serial 1 + +dnl Shamelessly cloned from acspecific.m4's AC_FUNC_UTIME_NULL. + +AC_DEFUN(jm_FUNC_UTIMES_NULL, +[AC_CACHE_CHECK(whether utimes accepts a null argument, ac_cv_func_utimes_null, +[rm -f conftestdata; > conftestdata +AC_TRY_RUN([#include <sys/types.h> +#include <sys/stat.h> +main() { +struct stat s, t; +exit(!(stat ("conftestdata", &s) == 0 && utimes("conftestdata", (long *)0) == 0 +&& stat("conftestdata", &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 $ac_cv_func_utimes_null = yes; then + if test x = y; then + # This code is deliberately never run via ./configure. + # FIXME: this is a hack to make autoheader put the corresponding + # HAVE_* undef for this symbol in config.h.in. This saves me the + # trouble of having to maintain the #undef in acconfig.h manually. + AC_CHECK_FUNCS(UTIMES_NULL) + fi + # Defining it this way (rather than via AC_DEFINE) short-circuits the + # autoheader check -- autoheader doesn't know it's already been taken + # care of by the hack above. + ac_kludge=HAVE_UTIMES_NULL + AC_DEFINE_UNQUOTED($ac_kludge) + fi + ] +) |