+--- a/configure.ac
++++ b/configure.ac
+@@ -42,7 +42,7 @@ AC_SUBST([CYASSL_LIBRARY_VERSION])
+
+ # capture user C_EXTRA_FLAGS from ./configure line, CFLAGS may hold -g -O2 even
+ # if user doesn't override, no way to tell
+-USER_C_EXTRA_FLAGS="$C_EXTRA_FLAGS"
++USER_C_EXTRA_FLAGS="$CFLAGS"
+
+ LT_PREREQ([2.2])
+ LT_INIT([disable-static],[win32-dll])