Use a helper msgfmt-desktop script instead of invoking msgfmt(1) directly

.gitattributes

@@ -1,9 +1,10 @@
-Makefile.am		ident
-/configure.ac		ident
-/build-aux/bootstrap	ident
-/doc/trader.*		ident
-/po/LINGUAS		ident
-/po/Makevars		ident
-/po/POTFILES.in		ident
-/src/*.c		ident
-/src/*.h		ident
+Makefile.am			ident
+/configure.ac			ident
+/build-aux/bootstrap		ident
+/build-aux/msgfmt-desktop	ident
+/doc/trader.*			ident
+/po/LINGUAS			ident
+/po/Makevars			ident
+/po/POTFILES.in			ident
+/src/*.c			ident
+/src/*.h			ident

Makefile.am

@@ -31,4 +31,6 @@
 SUBDIRS = lib src po data doc m4
 
 # Additional files to distribute
-EXTRA_DIST = build-aux/bootstrap
+EXTRA_DIST = \
+	build-aux/bootstrap		\
+	build-aux/msgfmt-desktop

build-aux/msgfmt-desktop

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+# Create or update desktop files using msgfmt(1)
+# $Id$
+
+# Usage:
+#   msgfmt-desktop -d PODIR INPUT OUTPUT
+
+set -e
+
+if [ x"$1" != x"-d" ]; then
+    echo "$0: Missing parameters" 1>&2
+    exit 1
+fi
+
+PODIR="$2"
+INPUT="$3"
+OUTPUT="$4"
+
+if ! msgfmt --desktop -d "$PODIR" --template "$INPUT" -o "$OUTPUT"; then
+    echo "$0: Using cp(1) program instead"
+    cp "$INPUT" "$OUTPUT"
+fi

data/Makefile.am

@@ -35,4 +35,4 @@ EXTRA_DIST = \
 
 
 trader.desktop: trader.desktop.in
-	msgfmt --desktop -d $(top_srcdir)/po --template $< -o $@
+	$(top_srcdir)/build-aux/msgfmt-desktop -d $(top_srcdir)/po $< $@