--- rxvt-unicode/autoconf/configure.in	2006/01/16 14:48:39	1.72
+++ rxvt-unicode/autoconf/configure.in	2006/01/16 15:36:55	1.75
@@ -2,9 +2,9 @@
 dnl#
 dnl# Process this file with autoconf to produce a configure script.
 dnl#
-orig_CXXFLAGS="$CXXFLAGS"
 
 AC_INIT
+AC_PREREQ(2.50)
 AC_CONFIG_SRCDIR([src/feature.h])
 AC_CONFIG_AUX_DIR(autoconf)
 AC_CONFIG_HEADER(config.h:autoconf/config.h.in)
@@ -25,6 +25,8 @@
 echo "configuring for rxvt $VERSION"
 echo ""
 
+orig_CXXFLAGS="$CXXFLAGS"
+
 dnl# Checks for programs.
 dnl AC_MAKE_SET
 
@@ -40,9 +42,10 @@
 dnl# Supply default CFLAGS, if not specified by `CFLAGS=flags ./configure'
 dnl#
 if test -z "$orig_CXXFLAGS"; then
-  CXXFLAGS='-O'
   if test x$GCC = xyes && test "x$GXX" = xyes; then
     CXXFLAGS="-g -O3"
+  else
+    CXXFLAGS="-O"
   fi
   CFLAGS="$CXXFLAGS"
 fi
@@ -300,11 +303,11 @@
     support_scroll_plain=$enableval
   fi])
 
-AC_ARG_ENABLE(half-shadow,
-  [  --enable-half-shadow    use half width/height shadow on rxvt scrollbar],
-  [if test x$enableval = xyes; then
-    AC_DEFINE(HALFSHADOW, 1, Define if you want the depth of scrollbars and menus to be less)
-  fi])
+dnl AC_ARG_ENABLE(half-shadow,
+dnl   [  --enable-half-shadow    use half width/height shadow on rxvt scrollbar],
+dnl   [if test x$enableval = xyes; then
+dnl     AC_DEFINE(HALFSHADOW, 1, Define if you want the depth of scrollbars and menus to be less)
+dnl   fi])
 
 AC_ARG_WITH(codesets,
   [  --with-codesets=NAME,.. compile in additional codesets (jp,jp_ext,kr,zh,zh_ext,all)],