Import gettext m4/automake bits from cdecl99.

[dxcommon.git] / m4 / linguas.m4

diff --git a/m4/linguas.m4 b/m4/linguas.m4
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+++ b/m4/linguas.m4
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+dnl Copyright © 2011 Nick Bowler
+dnl
+dnl Computes the set of .po and .mo files based on the LINGUAS environment
+dnl variable.  The variable POFILES is set to the complete list of .po files,
+dnl according to the LINGUAS file in the po directory.  The variable MOFILES
+dnl is set to the list of .mo files that the user has requested be installed.
+dnl Both POFILES and MOFILES are AC_SUBSTed.
+dnl
+dnl License WTFPL2: Do What The Fuck You Want To Public License, version 2.
+dnl This is free software: you are free to do what the fuck you want to.
+dnl There is NO WARRANTY, to the extent permitted by law.
+
+AC_DEFUN([DX_LINGUAS], [dnl
+AC_REQUIRE([AM_GNU_GETTEXT])
+
+POFILES=
+MOFILES=
+
+if test -f "$srcdir/po/LINGUAS"; then
+       ALL_LINGUAS=`sed 's/#.*$//' "$srcdir/po/LINGUAS"`
+
+       : ${LINGUAS=all}
+       if test x"$LINGUAS" != x"all"; then
+               # Replicate la_CC-style codes as la.
+               LINGUAS=`printf '%s\n' "$LINGUAS" \
+                       | [sed 's/\([^_[:space:]]*\)_[^[:space:]]*/& \1/g']`
+
+               printf '%s\n' $ALL_LINGUAS | sort > conftest.LINGUAS
+               LINGUAS=`printf '%s\n' $LINGUAS | sort \
+                       | join - conftest.LINGUAS`
+       else
+               LINGUAS=$ALL_LINGUAS
+       fi
+
+       # Note: $srcdir is not used here because these variables are for make.
+       set x $ALL_LINGUAS; shift
+       case ${#} in
+       0) ;;
+       *) POFILES=`printf "po/%s.po\n" "${@}"` ;;
+       esac
+
+       if test x"$USE_NLS" = x"yes"; then
+               set x $LINGUAS; shift
+               case ${#} in
+               0) ;;
+               *) MOFILES=`printf "po/%s.mo\n" "${@}"` ;;
+               esac
+       fi
+fi
+
+AC_SUBST([POFILES])
+AC_SUBST([MOFILES])
+])