* configure.in (CC): Get ^CC, not just any old CC, from

${host_makefile_frag}.

configure.in

@@ -134,7 +134,7 @@ fi
 # See if we can extract a definition of CC from the fragment.
 if [ -z "${CC}" ]; then
   if [ -n "${host_makefile_frag}" -a -f "${srcdir}/${host_makefile_frag}" ]; then
-    CC=`sed -n -e 's/CC[ 	]*=[ 	]*\(.*\)$/\1/p' < ${srcdir}/${host_makefile_frag}`
+    CC=`sed -n -e 's/^[ 	]*CC[ 	]*=[ 	]*\(.*\)$/\1/p' < ${srcdir}/${host_makefile_frag}`
   fi
 fi