diff -purN doxygen-1.8.1.orig/configure doxygen-1.8.1/configure
--- doxygen-1.8.1.orig/configure	2012-05-22 16:27:04.000000000 +0200
+++ doxygen-1.8.1/configure	2012-05-22 16:53:44.000000000 +0200
@@ -565,6 +565,19 @@ if test "$f_platform" = "hpux-g++" -o "$
     TMAKE_CXXFLAGS += -D_LARGEFILE_SOURCE
 EOF
 fi
+
+if test -n $CFLAGS; then
+  cat >> .tmakeconfig <<EOF
+    TMAKE_CFLAGS += $CFLAGS
+EOF
+fi
+
+if test -n $CXXFLAGS; then
+  cat >> .tmakeconfig <<EOF
+    TMAKE_CXXFLAGS += $CXXFLAGS
+EOF
+fi
+
 if test "$f_platform" = "macosx-uni-c++"; then
   if test -n "`ls /Developer/SDKs/MacOSX10.*.sdk 2>/dev/null`"; then
     mac_sdk=MacOSX10.4u.sdk