build: create and install .mo translation files

If --enable-translation was specified to configure, build and install
.mo files for the selected message language(s). The languages enabled
can be chosen with the --language-msg option; by default all available
ones will be installed. The .po source files for available languages
are seached under the po/ subdirectory; at the moment that
subdirectory is not included in the sources so no languages will be
enabled unless you add the actual translations before running
configure.

The .mo files are created in the locale/ subdirectory when compiling.
By default MPlayer will only look for them in the installed location,
so the newly compiled .mo files will not be found if you run MPlayer
without installing. You can set the MPLAYER_LOCALEDIR environment
variable to point to the locale/ directory to test the translations
without installing.

DOCS/man/en/mplayer.1

@@ -11114,6 +11114,10 @@ A value of "noconv" means no conversion.
 Directory where MPlayer looks for user settings.
 .
 .TP
+.B MPLAYER_LOCALEDIR
+Directory where MPlayer looks for gettext translation files (if enabled).
+.
+.TP
 .B MPLAYER_VERBOSE (also see \-v and \-msglevel)
 Set the initial verbosity level across all message modules (default: 0).
 The resulting verbosity corresponds to that of \-msglevel 5 plus the

Makefile

@@ -694,7 +694,9 @@ ALL_PRG-$(MPLAYER)  += mplayer$(EXESUF)
 ALL_PRG-$(MENCODER) += mencoder$(EXESUF)
 
 INSTALL_TARGETS-$(MENCODER) += install-mencoder install-mencoder-man
-INSTALL_TARGETS-$(MPLAYER)  += install-mplayer  install-mplayer-man
+INSTALL_TARGETS-$(MPLAYER)  += install-mplayer \
+                               install-mplayer-man \
+                               install-mplayer-msg
 
 DIRS =  . \
         input \
@@ -733,6 +735,8 @@ DIRS =  . \
         TOOLS \
         vidix \
 
+MOFILES := $(MSG_LANGS:%=locale/%/LC_MESSAGES/mplayer.mo)
+
 ALLHEADERS = $(foreach dir,$(DIRS),$(wildcard $(dir)/*.h))
 
 ADDSUFFIXES     = $(foreach suf,$(1),$(addsuffix $(suf),$(2)))
@@ -741,7 +745,7 @@ ADD_ALL_EXESUFS = $(1) $(call ADDSUFFIXES,$(EXESUFS_ALL),$(1))
 
 ###### generic rules #######
 
-all: $(ALL_PRG-yes)
+all: $(ALL_PRG-yes) locales
 
 %.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ -MD -MP -MF $*.d $<
@@ -789,6 +793,12 @@ version.h: version.sh
 
 %(EXESUF): %.c
 
+locales: $(MOFILES)
+
+locale/%/LC_MESSAGES/mplayer.mo: po/%.po
+	mkdir -p $(dir $@)
+	msgfmt -c -o $@ $<
+
 
 
 ###### dependency declarations / specific CFLAGS ######
@@ -852,6 +862,7 @@ install-%: %$(EXESUF) install-dirs
 
 install-mencoder-man: $(foreach lang,$(MAN_LANGS),install-mencoder-man-$(lang))
 install-mplayer-man:  $(foreach lang,$(MAN_LANGS),install-mplayer-man-$(lang))
+install-mplayer-msg:  $(foreach lang,$(MSG_LANGS),install-mplayer-msg-$(lang))
 
 install-mencoder-man-en: install-mplayer-man-en
 	cd $(MANDIR)/man1 && ln -sf mplayer.1 mencoder.1
@@ -874,6 +885,14 @@ endef
 $(foreach lang,$(filter-out en,$(MAN_LANG_ALL)),$(eval $(MENCODER_MAN_RULE)))
 $(foreach lang,$(filter-out en,$(MAN_LANG_ALL)),$(eval $(MPLAYER_MAN_RULE)))
 
+define MPLAYER_MSG_RULE
+install-mplayer-msg-$(lang):
+	if test ! -d $(LOCALEDIR)/$(lang)/LC_MESSAGES ; then $(INSTALL) -d $(LOCALEDIR)/$(lang)/LC_MESSAGES ; fi
+	$(INSTALL) -m 644 locale/$(lang)/LC_MESSAGES/mplayer.mo $(LOCALEDIR)/$(lang)/LC_MESSAGES/
+endef
+
+$(foreach lang,$(MSG_LANG_ALL),$(eval $(MPLAYER_MSG_RULE)))
+
 uninstall:
 	rm -f $(BINDIR)/mplayer$(EXESUF) $(BINDIR)/gmplayer$(EXESUF)
 	rm -f $(BINDIR)/mencoder$(EXESUF)
@@ -882,6 +901,7 @@ uninstall:
 	rm -f $(prefix)/share/applications/mplayer.desktop
 	rm -f $(MANDIR)/man1/mplayer.1 $(MANDIR)/man1/mencoder.1
 	rm -f $(foreach lang,$(MAN_LANGS),$(foreach man,mplayer.1 mencoder.1,$(MANDIR)/$(lang)/man1/$(man)))
+	rm -f $(foreach lang,$(MSG_LANGS),$(LOCALEDIR)/$(lang)/LC_MESSAGES/mplayer.1)
 
 clean:
 	-rm -f $(call ADD_ALL_DIRS,/*.o /*.a /*.ho /*~)

configure

@@ -197,6 +197,8 @@ case $(echo -n) in
   *)    _echo_n='-n '   _echo_c=        ;;      # BSD echo
 esac
 
+msg_lang_all=''
+ls po/*.po >/dev/null 2>&1 && msg_lang_all=$(echo po/*.po | sed -e 's:po/\([^[:space:]]*\)\.po:\1:g')
 man_lang_all=$(echo DOCS/man/??/mplayer.1 DOCS/man/??_??/mplayer.1 | sed -e "s:DOCS/man/\(..\)/mplayer.1:\1:g" -e "s:DOCS/man/\(.._..\)/mplayer.1:\1:g")
 doc_lang_all=$(echo DOCS/xml/??/ DOCS/xml/??_??/ | sed -e "s:DOCS/xml/\(..\)/:\1:g" -e "s:DOCS/xml/\(.._..\)/:\1:g")
 
@@ -402,14 +404,18 @@ Language options:
   --charset=charset      convert the console messages to this character set
   --language-doc=lang    language to use for the documentation [en]
   --language-man=lang    language to use for the man pages [en]
+  --language-msg=lang    extra languages for program messages [all]
   --language=lang        default language to use [en]
 Specific options override --language. You can pass a list of languages separated
 by whitespace or commas instead of a single language. Nonexisting translations
-will be dropped from each list. All documentation and man page translations
+will be dropped from each list. All translations available in the list will be
-available in the list will be installed, for the messages the first available
+installed. The value "all" will activate all translations. The LINGUAS
-translation will be used. The value "all" will activate all translations. The
+environment variable is honored. In all cases the fallback is English.
-LINGUAS environment variable is honored. In all cases the fallback is English.
+The program always supports English-language output; additional message
-Available values are: all $man_lang_all
+languages are only installed if --enable-translation is also specified.
+Available values for --language-doc are: all $doc_lang_all
+Available values for --language-man are: all $man_lang_all
+Available values for --language-msg are: all $msg_lang_all
 
 Miscellaneous options:
   --enable-runtime-cpudetection    enable runtime CPU detection [disable]
@@ -819,6 +825,9 @@ for ac_option do
   --language-man=*)
     language_man=$(echo $ac_option | cut -d '=' -f 2)
     ;;
+  --language-msg=*)
+    language_msg=$(echo $ac_option | cut -d '=' -f 2)
+    ;;
   --language=*)
     language=$(echo $ac_option | cut -d '=' -f 2)
     ;;
@@ -2843,11 +2852,18 @@ echocheck "language"
 test -z "$language" && language=$LINGUAS
 test -z "$language_doc" && language_doc=$language
 test -z "$language_man" && language_man=$language
+test -z "$language_msg" && language_msg="all"
 language_doc=$(echo $language_doc | tr , " ")
 language_man=$(echo $language_man | tr , " ")
+language_msg=$(echo $language_msg | tr , " ")
 
 test "$language_doc" = "all" && language_doc=$doc_lang_all
 test "$language_man" = "all" && language_man=$man_lang_all
+test "$language_msg" = "all" && language_msg=$msg_lang_all
+
+if test "$_translation" != yes ; then
+  language_msg=""
+fi
 
 # Prune non-existing translations from language lists.
 # Set message translation to the first available language.
@@ -2864,7 +2880,12 @@ done
 language_man=$tmp_language_man
 test -z "$language_man" && language_man=en
 
-echores "man pages: $language_man - documentation: $language_doc"
+for lang in $language_msg ; do
+  test -f po/$lang.po && tmp_language_msg="$tmp_language_msg $lang"
+done
+language_msg=$tmp_language_msg
+
+echores "messages (en+): $language_msg - man pages: $language_man - documentation: $language_doc"
 
 
 echocheck "enable sighandler"
@@ -7819,6 +7840,8 @@ DOC_LANGS = $language_doc
 DOC_LANG_ALL = $doc_lang_all
 MAN_LANGS = $language_man
 MAN_LANG_ALL = $man_lang_all
+MSG_LANGS = $language_msg
+MSG_LANG_ALL = $msg_lang_all
 
 prefix = \$(DESTDIR)$_prefix
 BINDIR = \$(DESTDIR)$_bindir
@@ -8553,6 +8576,7 @@ Config files successfully generated by ./configure $_configuration !
   Optimizing for: $_optimizing
 
   Languages:
+    Messages (in addition to English): $language_msg
     Manual pages: $language_man
     Documentation: $language_doc