2003-01-05 Yoshinori K. Okuji <okuji@enbug.org>

* configure.in (CFLAGS): When the default CFLAGS is used,
	eliminate -O2 and -g from CFLAGS, because Autoconf may
	automatically set CFLAGS to them.

configure

@@ -2917,7 +2917,8 @@ fi
 # optimization flags
 if test "x$ac_cv_c_compiler_gnu" = xyes; then
   if test "x$default_CFLAGS" = xyes; then
-    CFLAGS="$CFLAGS -g"
+    # Autoconf may set CFLAGS to -O2 and/or -g. So eliminate them.
+    CFLAGS="`echo $CFLAGS | sed -e 's/-g//g' -e 's/-O[0-9]/g'` -g"
     # If the user specify the directory for binutils, add the option `-B'.
     if test "x$with_binutils" != x; then
       CFLAGS="-B$with_binutils/ $CFLAGS"