--- configure
+++ configure
@@ -3733,13 +3733,16 @@
   for xc_word in $CFLAGS; do
     case "$xc_word" in
       -D*)
-        xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
+        #xc_bad_var_cflags=yes
         ;;
       -U*)
-        xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
+        #xc_bad_var_cflags=yes
         ;;
       -I*)
-        xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
+        #xc_bad_var_cflags=yes
         ;;
       -rpath*)
         xc_bad_var_cflags=yes
@@ -41453,13 +41456,16 @@
   for xc_word in $CFLAGS; do
     case "$xc_word" in
       -D*)
-        xc_bad_var_cflags=yes
+        #xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
         ;;
       -U*)
-        xc_bad_var_cflags=yes
+        #xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
         ;;
       -I*)
-        xc_bad_var_cflags=yes
+        #xc_bad_var_cflags=yes
+        CPPFLAGS="$CPPFLAGS $xc_word"
         ;;
       -rpath*)
         xc_bad_var_cflags=yes