+# If we have the fstatat function, and it has the bug (in AIX 7.1)
+# that it does not fill in st_size correctly, use the replacement function.
+AC_DEFUN([gl_FUNC_FSTATAT],
+[
+ AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+ AC_CHECK_FUNCS_ONCE([fstatat openat])
+
+ if test $ac_cv_func_fstatat = no; then
+ HAVE_FSTATAT=0
+ else
+ AC_CACHE_CHECK([whether fstatat fills in st_size etc.],
+ [gl_cv_func_fstatat_st_size_etc],
+ [gl_cv_func_fstatat_st_size_etc=no
+ echo xxx >conftest.file
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE(
+ [[
+ #include <fcntl.h>
+ #include <sys/stat.h>
+
+ int
+ main (void)
+ {
+ struct stat a;
+ struct stat b;
+ if (fstatat (AT_FDCWD, "conftest.file", &a,
+ AT_SYMLINK_NOFOLLOW)
+ != 0)
+ return 1;
+ if (lstat ("conftest.file", &b) != 0)
+ return 2;
+ if (a.st_size != b.st_size) return 3;
+ if (a.st_dev != b.st_dev) return 4;
+ if (a.st_ino != b.st_ino) return 5;
+ if (a.st_mode != b.st_mode) return 6;
+ if (a.st_nlink != b.st_nlink) return 7;
+ if (a.st_uid != b.st_uid) return 8;
+ if (a.st_gid != b.st_gid) return 9;
+ /* Don't check time members, to avoid caching issues. */
+ return 0;
+ }
+ ]])],
+ [gl_cv_func_fstatat_st_size_etc=yes])])
+
+ case $gl_cv_func_fstatat_st_size_etc+$gl_cv_func_lstat_dereferences_slashed_symlink in
+ yes+yes) ;;
+ *) REPLACE_FSTATAT=1
+ if test $gl_cv_func_fstatat_st_size_etc != yes; then
+ AC_DEFINE([FSTATAT_ST_SIZE_ETC_BROKEN], [1],
+ [Define to 1 if fstatat does not fill in st_size etc.,
+ as in AIX 7.1.])
+ fi
+ ;;
+ esac
+ fi
+])
+