gettext: more recent makevars; new script to update po files.

Previously, "make dist" and similar commands would cause the po files
to be updated, which is incorrect. The more recent version now used
should not do this.

Replaced Rules-getpo by extra script to manually update and rebuild all po files.

po/Makevars

@@ -8,7 +8,7 @@ subdir = po
 top_builddir = ..
 
 # These options get passed to xgettext.
-XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
+XGETTEXT_OPTIONS = --language=C --keyword=_ --keyword=N_
 
 # This is the copyright holder that gets inserted into the header of the
 # $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding
@@ -20,6 +20,13 @@ XGETTEXT_OPTIONS = --keyword=_ --keyword=N_
 # their copyright.
 COPYRIGHT_HOLDER = 
 
+# This tells whether or not to prepend "GNU " prefix to the package
+# name that gets inserted into the header of the $(DOMAIN).pot file.
+# Possible values are "yes", "no", or empty.  If it is empty, try to
+# detect it automatically by scanning the files in $(top_srcdir) for
+# "GNU packagename" string.
+PACKAGE_GNU = "no"
+
 # This is the email address or URL to which the translators shall report
 # bugs in the untranslated strings:
 # - Strings which are not entire sentences, see the maintainer guidelines
@@ -39,3 +46,33 @@ MSGID_BUGS_ADDRESS = flex-devel@lists.sourceforge.net
 # This is the list of locale categories, beyond LC_MESSAGES, for which the
 # message catalogs shall be used.  It is usually empty.
 EXTRA_LOCALE_CATEGORIES =
+
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context.  Possible values are "yes" and "no".  Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = no
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+#   --previous            to keep previous msgids of translated messages,
+#   --quiet               to reduce the verbosity.
+MSGMERGE_OPTIONS =
+
+# These options get passed to msginit.
+# If you want to disable line wrapping when writing PO files, add
+# --no-wrap to MSGMERGE_OPTIONS, XGETTEXT_OPTIONS, and
+# MSGINIT_OPTIONS.
+MSGINIT_OPTIONS =
+
+# This tells whether or not to regenerate a PO file when $(DOMAIN).pot
+# has changed.  Possible values are "yes" and "no".  Set this to no if
+# the POT file is checked in the repository and the version control
+# program ignores timestamps.
+PO_DEPENDS_ON_POT = yes
+
+# This tells whether or not to forcibly update $(DOMAIN).pot and
+# regenerate PO files on "make dist".  Possible values are "yes" and
+# "no".  Set this to no if the POT file and PO files are maintained
+# externally.
+DIST_DEPENDS_ON_UPDATE_PO = no

po/Rules-getpo

@@ -1,9 +0,0 @@
-# Rules to fetch the translation project's po files for a domain
-
-# Just rsync the *.po files for a particular textual domain into the
-# po/ subdirectory of the project's source tree
-
-getpo:
-	rsync -Ltvz  translationproject.org::tp/latest/flex/*.po $(top_srcdir)/po
-
-.PHONY: getpo

po/update_linguas.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+# shell for updating the translations before a release
+
+# Let this be executed in the po/ subdir.
+cd "$(dirname "$0")" || exit
+
+echo "Updating translations via TP"
+rsync -Lrtvz  translationproject.org::tp/latest/flex/ . # || exit
+
+# Are there now PO files that are not in svn yet?
+NEWSTUFF=$(git status --porcelain *.po | grep "^??")
+
+if [ -n "${NEWSTUFF}" ]; then
+    echo "New languages found; updating LINGUAS"
+    echo "# List of available languages." >LINGUAS
+    echo $(printf '%s\n' *.po | LC_ALL=C sort | sed 's/\.po//g') >>LINGUAS
+fi
+
+echo "Regenerating POT file and remerging and recompiling PO files..."
+make update-po
+
+# Ensure that the PO files are newer than the POT.
+touch *.po
+
+# Compile PO files
+make