[ChangeLog]

Assume S_ISLNK etc. work, since gnulib supports this.
* Makefile.in (GNULIB_MODULES): Add sys_stat.
* configure.in: Check for lstat and set HAVE_LSTAT=0 if not.
Pretend to be using the gnulib lstat module for benefit of sys/stat.h.
* configure, lib/Makefile.in, lib/gnulib.mk: Regenerate.
[lib-src/ChangeLog]
Assume S_ISLNK etc. work, since gnulib supports this.
* etags.c (S_ISREG): Remove.
[src/ChangeLog]
Assume S_ISLNK etc. work, since gnulib supports this.
* config.in: Regenerate.
* dired.c (lstat): Remove.
(file_name_completion): Assume S_ISDIR works.
(file_name_completion_stat): Assume S_ISLNK works.
Do not bother calling stat unless lstat says it's a symlink.
* fileio.c (S_ISLNK, S_ISFIFO, S_ISREG, lstat): Remove.
(Fcopy_file): Assume S_ISREG and S_ISLNK work.
(check_writable, Ffile_writable_p, Fset_file_times):
Assume S_ISDIR works.
(Ffile_readable_p): Use S_IFIFO, not S_ISFIFO, to guess whether
fifos exist.
(Ffile_regular_p, Finsert_file_contents): Assumes S_ISREG works.
* filelock.c (S_ISLNK): Remove.
* lread.c (openp): Assume S_ISDIR works.
* xrdb.c (S_ISDIR): Remove.

1 files changed, 18 insertions, 0 deletions

diff --git a/configure b/configure
index 16673f2ca79..70aa60bb1e7 100755
--- a/configure
+++ b/configure
@@ -2963,6 +2963,7 @@ as_fn_append ac_func_list " tzset"
 as_fn_append ac_header_list " sys/stat.h"
 as_fn_append ac_header_list " sys/time.h"
 as_fn_append ac_func_list " localtime_r"
+as_fn_append ac_func_list " lstat"
 # Check that the precious variables saved in the cache have kept the same
 # value.
 ac_cache_corrupted=false
@@ -17211,6 +17212,23 @@ $as_echo "$gl_cv_next_unistd_h" >&6; }
 
 
 
+# Emacs does not care about lstat's behavior on files whose names end in
+# trailing slashes, so it does not use the gnulib lstat module.
+# However, Emacs does want the "#define lstat stat" in sys/stat.h
+# when lstat does not exist, so it pretends to use the lstat module
+# even though it implements only the lstat-checking part of that module.
+
+
+
+test $ac_cv_func_lstat = yes || HAVE_LSTAT=0
+
+
+
+  GNULIB_LSTAT=1
+
+
+
+
 # UNIX98 PTYs.
 for ac_func in grantpt
 do :