--- ocaml-3.10.0/configure.opt	2007-06-02 16:50:12.000000000 +0200
+++ ocaml-3.10.0/configure	2007-06-02 16:50:34.000000000 +0200
@@ -1425,6 +1425,10 @@
     nativecccompopts="$nativecccompopts -fomit-frame-pointer";;
 esac
 
+# Allow user defined C Compiler flags
+bytecccompopts="$bytecccompopts $CFLAGS"
+nativecccompopts="$nativecccompopts $CFLAGS"
+
 # Finish generated files
 
 cclibs="$cclibs $mathlib"