Set GNUSTEP_MAKEFILES using gnustep-config if not yet set

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/libobjc/trunk@24718 72102866-910b-0410-8b05-ffd578937521

ChangeLog.GNUstep

@@ -1,3 +1,9 @@
+2007-02-28  Nicola Pero  <nicola.pero@meta-innovation.com>	
+
+	* GNUmakefile (GNUSTEP_MAKEFILES): Use gnustep-config to
+	set this up if not already set.  Emit an error if it can't
+	be set.
+
 2007-02-13  Adam Fedor  <fedor@gnu.org>
 
 	* GNUmakefile: Set SVN module name/url.

GNUmakefile

@@ -23,6 +23,14 @@
 #
 # $Id$
 
+ifeq ($(GNUSTEP_MAKEFILES),)
+ GNUSTEP_MAKEFILES := $(shell gnustep-config --variable=GNUSTEP_MAKEFILES 2>/dev/null)
+endif
+
+ifeq ($(GNUSTEP_MAKEFILES),)
+  $(error You need to set GNUSTEP_MAKEFILES before compiling!)
+endif
+
 include $(GNUSTEP_MAKEFILES)/common.make
 
 PACKAGE_NAME = gnustep-objc