Use Gnulib filevercmp for version comparison

* admin/merge-gnulib (GNULIB_MODULES): Add filevercmp.
* doc/lispref/strings.texi (Text Comparison):
* etc/NEWS, src/fns.c:
* test/src/fns-tests.el (fns-tests-string-version-lessp):
Rename newly-introduced function to string-version-lessp, by
analogy with strverscmp.
* lib/filevercmp.c, lib/filevercmp.h: New files, copied from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* src/fns.c: Include <filevercmp.h>.
(gather_number_from_string): Remove.
(Fstring_version_lessp): Reimplement via filevercmp.

1 files changed, 3 insertions, 0 deletions

diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index 831bb4c4f4b..5a3fc98597c 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -78,6 +78,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module fdatasync:
   # Code from module fdopendir:
   # Code from module filemode:
+  # Code from module filevercmp:
   # Code from module fpending:
   # Code from module fstatat:
   # Code from module fsync:
@@ -889,6 +890,8 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/fdopendir.c
   lib/filemode.c
   lib/filemode.h
+  lib/filevercmp.c
+  lib/filevercmp.h
   lib/fpending.c
   lib/fpending.h
   lib/fstatat.c