Tweaks to configure.inc to maybe make clang a little less anal about things.

configure.inc

@@ -193,8 +193,8 @@ AC_CHECK_FUNCS () {
     B=`echo "$1" | sed -e 's/(.*)//'`
 
     case "$B" in
-    "$1") F="$1()" ;;
-    *)    F="$1" ;;
+    "$1") F="$1()"; need_proto=1 ;;
+    *)    F="$1"  ; unset need_proto ;;
     esac
 
     shift
@@ -205,6 +205,10 @@ AC_CHECK_FUNCS () {
 	shift
     done
 
+    if [ "$need_proto" ]; then
+	echo "void $F;" >> ngc$$.c
+    fi
+
     cat >> ngc$$.c << EOF
 main()
 {
@@ -1169,6 +1173,8 @@ AC_CHECK_BASENAME() {
     cat > ngc$$.c << EOF
 #include <string.h>
 
+extern char *basename(char*);
+
 main()
 {
     char *a = basename("/a/test");