Re: [LTP] [RFC PATCH 1/2] autoconf check for utimensat(2)

[chrubis@suse.cz]

Hi!
> +AC_DEFUN([LTP_CHECK_SYSCALL_UTIMENSAT],[
> +	AC_MSG_CHECKING([for utimensat])
> +	AC_LINK_IFELSE([AC_LANG_SOURCE([
> +#include <stdlib.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +
> +int main(void) {
> +	long tv_nsec;
> +	tv_nsec = UTIME_NOW;
> +	tv_nsec = UTIME_OMIT;
> +
> +	return utimensat(AT_FDCWD, (const char *) "/dev/null", NULL, 0);
> +}])],[has_utimensat="yes"])

Why the cast to const char* and why cannot be the second parameter NULL
too (it's just linked not executed)?

> +
> +if test "x$has_utimensat" == "xyes"; then
> +	AC_DEFINE(HAVE_UTIMENSAT, 1, [Define to 1 if you have utimensat(2)])
> +	AC_MSG_RESULT(yes)
> +else
> +	AC_MSG_RESULT(no)
> +fi
> +])

-- 
Cyril Hrubis
chrubis@suse.cz

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