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40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
#serial 2
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dnl Shamelessly cloned from acspecific.m4's AC_FUNC_UTIME_NULL.
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AC_DEFUN(jm_FUNC_UTIMES_NULL,
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[AC_CACHE_CHECK(whether utimes accepts a null argument, ac_cv_func_utimes_null,
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[rm -f conftestdata; > conftestdata
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AC_TRY_RUN([
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/* In case stat has been defined to rpl_stat, undef it here. */
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#undef stat
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#include <sys/types.h>
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#include <sys/stat.h>
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main() {
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struct stat s, t;
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exit(!(stat ("conftestdata", &s) == 0 && utimes("conftestdata", (long *)0) == 0
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&& stat("conftestdata", &t) == 0 && t.st_mtime >= s.st_mtime
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&& t.st_mtime - s.st_mtime < 120));
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}],
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ac_cv_func_utimes_null=yes,
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ac_cv_func_utimes_null=no,
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ac_cv_func_utimes_null=no)
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rm -f core core.* *.core])
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if test $ac_cv_func_utimes_null = yes; then
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if test x = y; then
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# This code is deliberately never run via ./configure.
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# FIXME: this is a hack to make autoheader put the corresponding
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# HAVE_* undef for this symbol in config.h.in. This saves me the
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# trouble of having to maintain the #undef in acconfig.h manually.
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AC_CHECK_FUNCS(UTIMES_NULL)
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fi
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# Defining it this way (rather than via AC_DEFINE) short-circuits the
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# autoheader check -- autoheader doesn't know it's already been taken
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# care of by the hack above.
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ac_kludge=HAVE_UTIMES_NULL
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AC_DEFINE_UNQUOTED($ac_kludge)
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fi
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]
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)
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