posix: build gettext files

Originally committed to SVN as r373.

Makefile.am

@@ -1,3 +1,3 @@
 AUTOMAKE_OPTIONS = foreign
-SUBDIRS = ac core
+SUBDIRS = ac core locale
 

configure.ac

@@ -6,6 +6,8 @@ AC_CONFIG_HEADER([core/posix/acconf.h])
 
 AC_CANONICAL_HOST
 
+AM_GNU_GETTEXT
+
 AC_DEFUN([AC_C_FLAG], [{
 	AC_LANG_PUSH(C)
 	ac_c_flag_save="$CFLAGS"
@@ -139,6 +141,7 @@ AC_HEADER_STDBOOL
 AC_OUTPUT([
 	Makefile
 	ac/Makefile
+	locale/Makefile
 	core/Makefile
 	core/posix/Makefile
 	core/bitmaps/Makefile

locale/Makefile.am

@@ -0,0 +1,13 @@
+LANGS=de es fr it ko pt_BR ru
+localedir = $(datadir)/locale
+
+%.gmo: %/aegisub.po
+	$(MSGFMT) -o $@ $<
+
+all-am: $(foreach lang,$(LANGS),$(lang).gmo)
+
+install-data-am: all-am
+	for lang in $(LANGS); do \
+	  $(install_sh_DATA) $${lang}.gmo $(DESTDIR)$(localedir)/$${lang}/LC_MESSAGES/aegisub.mo; \
+	done
+