Fix the linux motif/glibc config problems once and for all. Build a small

test program to find out if we are using gnu libc2.  Build a small test
program to determine the version of motif/lesstif being used.  Use the
output of these to set flags used in the xfe.  See config/Makefile for
comments.

config/glibcversion.sh

@@ -0,0 +1,80 @@
+#!/bin/sh
+#
+# The contents of this file are subject to the Netscape Public License
+# Version 1.0 (the "NPL"); you may not use this file except in
+# compliance with the NPL.  You may obtain a copy of the NPL at
+# http://www.mozilla.org/NPL/
+#
+# Software distributed under the NPL is distributed on an "AS IS" basis,
+# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+# for the specific language governing rights and limitations under the
+# NPL.
+#
+# The Initial Developer of this code under the NPL is Netscape
+# Communications Corporation.  Portions created by Netscape are
+# Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+# Reserved.
+#
+
+##############################################################################
+##
+## Name:		xmversion.sh - a fast way to get a motif lib's version
+##
+## Description:	Print the major and minor version numbers for motif libs on
+##				the system that executes the script.  Could be tweaked
+##				to output more info.
+##
+##              More checks need to be added for more platforms.  
+##              Currently this script is only useful in Linux Universe
+##              where there are a many versions of motif.
+##
+## Author:		Ramiro Estrugo <ramiro@netscape.com>
+##
+##############################################################################
+
+TEST_GLIBC_PROG=./test_glibc
+TEST_GLIBC_SRC=test_glibc.c
+
+rm -f $TEST_GLIBC_PROG
+rm -f $TEST_GLIBC_SRC
+
+cat << EOF > test_glibc.c
+#include <stdio.h>
+
+int main(int argc,char ** argv) 
+{
+#ifdef 	__GLIBC__
+	fprintf(stdout,"%d\n",__GLIBC__);
+#else
+	fprintf(stdout,"none\n");
+#endif
+
+	return 0;
+}
+EOF
+
+if [ ! -f $TEST_GLIBC_SRC ]
+then
+	echo
+	echo "Could not create test program source $TEST_GLIBC_SRC."
+	echo
+
+	exit
+fi
+
+cc -o $TEST_GLIBC_PROG $TEST_GLIBC_SRC
+
+if [ ! -x $TEST_GLIBC_PROG ]
+then
+	echo
+	echo "Could not create test program $TEST_GLIBC_PROG."
+	echo
+
+	exit
+fi
+
+$TEST_GLIBC_PROG
+
+rm -f $TEST_GLIBC_PROG
+rm -f $TEST_GLIBC_SRC
+