gnu: doc: Allow documentation to be translated.

* po/doc/contributing.pot: New file.
* po/doc/guix.pot: New file.
* po/doc/local.mk: New file.
* Makefile.am: Include it. Add gettext command. Add silent rules for po4a.
* configure.ac: Look for po4a-translate and po4a-updatepo.
* doc/local.mk: Add rules to generate translated texi files.
(TRANSLATED_INFO): New variable.
(BUILT_SOURCES, EXTRA_DIST, MAINTAINERCLEANFILES): Add it.
* .gitignore: Add generated files.

1 files changed, 4 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 5872a848239..557da63189b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -263,6 +263,10 @@ AM_MISSING_PROG([DOT], [dot])
 dnl Manual pages.
 AM_MISSING_PROG([HELP2MAN], [help2man])
 
+dnl Documentation translation.
+AM_MISSING_PROG([PO4A_TRANSLATE], [po4a-translate])
+AM_MISSING_PROG([PO4A_UPDATEPO], [po4a-updatepo])
+
 dnl Emacs (optional), for 'etc/indent-package.el'.
 AC_PATH_PROG([EMACS], [emacs], [/usr/bin/emacs])
 AC_SUBST([EMACS])