diff options
Diffstat (limited to 'm4/st_mtim.m4')
| -rw-r--r-- | m4/st_mtim.m4 | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/m4/st_mtim.m4 b/m4/st_mtim.m4 new file mode 100644 index 0000000..4d03c8e --- /dev/null +++ b/m4/st_mtim.m4 @@ -0,0 +1,32 @@ +#serial 6 + +dnl From Paul Eggert. + +# Define ST_MTIM_NSEC to be the nanoseconds member of struct stat's st_mtim, +# if it exists. + +AC_DEFUN([AC_STRUCT_ST_MTIM_NSEC], + [AC_CACHE_CHECK([for nanoseconds member of struct stat.st_mtim], + ac_cv_struct_st_mtim_nsec, + [ac_save_CPPFLAGS="$CPPFLAGS" + ac_cv_struct_st_mtim_nsec=no + # tv_nsec -- the usual case + # _tv_nsec -- Solaris 2.6, if + # (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1 + # && !defined __EXTENSIONS__) + # st__tim.tv_nsec -- UnixWare 2.1.2 + for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do + CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val" + AC_TRY_COMPILE([#include <sys/types.h> +#include <sys/stat.h>], [struct stat s; s.st_mtim.ST_MTIM_NSEC;], + [ac_cv_struct_st_mtim_nsec=$ac_val; break]) + done + CPPFLAGS="$ac_save_CPPFLAGS"]) + + if test $ac_cv_struct_st_mtim_nsec != no; then + AC_DEFINE_UNQUOTED(ST_MTIM_NSEC, $ac_cv_struct_st_mtim_nsec, + [Define to be the nanoseconds member of struct stat's st_mtim, + if it exists.]) + fi + ] +) |