diff -r a64e4735bda6 -r b0b3fa857d72 configure.ac
--- a/configure.ac	Wed Jan 25 14:58:04 2006 +0000
+++ b/configure.ac	Wed Jan 25 15:03:45 2006 +0000
@@ -6,6 +6,8 @@
 AC_CONFIG_HEADERS([config.h lemon/config.h])
 AC_PREREQ([2.59])
 
+lx_cmdline_cxxflags_set=${CXXFLAGS+set}
+
 dnl Checks for programs.
 AC_PROG_CXX
 AC_PROG_CXXCPP
@@ -13,7 +15,7 @@
 AC_DISABLE_SHARED
 AC_PROG_LIBTOOL
 
-if test $CXX != icc -a $CXX != icpc; then
+if test x"$lx_cmdline_cxxflags_set" != x"set" -a "$GXX" = yes; then
   CXXFLAGS="$CXXFLAGS -Wall -W"
 fi