gnulib: let it use its own PO domain

See
https://www.gnu.org/software/gnulib/manual/html_node/Localization.html.

* bootstrap.conf: Create gnulib-po.
* Makefile.am, configure.ac: Use it.
* po/POTFILES.in: Remove files now in gnulib.
* src/main.c: Open the bison-gnulib domain.

Makefile.am

@@ -18,7 +18,7 @@
 AUTOMAKE_OPTIONS = subdir-objects
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = po runtime-po .
+SUBDIRS = po runtime-po gnulib-po .
 
 # Files installed for use by Automake.
 aclocaldir = @aclocaldir@

TODO

@@ -1,13 +1,5 @@
 * Bison 3.4
 ** use gettext-h in gnulib instead of gettext
-** use gnulib-po
-For some reason, according to syntax-check, we have to keep getopt.c in
-POTIFILES.in, but not bitset/stats.c, although both come from gnulib.  But
-bitset/stats.c is a symlink, not getopt.c.  This is fishy and should be
-fixed.
-
-Meanwhile, bitset/stats.c is removed from the set of translations, which is
-not too much of a problem as users are not expected to see this.
 
 ** bad diagnostics
 %token <val> NUM

bootstrap.conf

@@ -85,7 +85,7 @@ excluded_files='
     m4/visibility.m4
 '
 
-gnulib_tool_option_extras='--symlink --conditional-dependencies --makefile-name=gnulib.mk'
+gnulib_tool_option_extras='--symlink --conditional-dependencies --makefile-name=gnulib.mk --po-base=gnulib-po --po-domain=bison'
 
 bootstrap_post_import_hook()
 {

configure.ac

@@ -251,6 +251,7 @@ AM_WITH_DMALLOC
 AM_GNU_GETTEXT([external], [need-ngettext])
 AM_GNU_GETTEXT_VERSION([0.18])
 BISON_I18N
+AC_CONFIG_FILES([gnulib-po/Makefile.in])
 
 # Internationalized parsers.
 AC_CONFIG_FILES([runtime-po/Makefile.in])

po/POTFILES.in

@@ -17,15 +17,3 @@ src/scan-code.l
 src/scan-gram.l
 src/scan-skel.l
 src/symtab.c
-
-lib/argmatch.c
-lib/closeout.c
-lib/error.c
-lib/getopt.c
-lib/obstack.c
-lib/spawn-pipe.c
-lib/quotearg.c
-lib/timevar.c
-lib/w32spawn.h
-lib/wait-process.c
-lib/xalloc-die.c

src/main.c

@@ -66,11 +66,12 @@ main (int argc, char *argv[])
   {
     char *cp = NULL;
     char const *localedir = relocate2 (LOCALEDIR, &cp);
-    (void) bindtextdomain (PACKAGE, localedir);
-    (void) bindtextdomain ("bison-runtime", localedir);
+    bindtextdomain ("bison", localedir);
+    bindtextdomain ("bison-gnulib", localedir);
+    bindtextdomain ("bison-runtime", localedir);
     free (cp);
   }
-  (void) textdomain (PACKAGE);
+  textdomain ("bison");
 
   {
     char const *cp = getenv ("LC_CTYPE");