From a48c026a313841936fcbafbcd7205dd3f7ea616f Mon Sep 17 00:00:00 2001
From: Connor Olding <cloningdonor@gmail.com>
Date: Mon, 27 May 2019 11:23:58 +0200
Subject: [PATCH] use CPPFLAGS with the preprocessor

d'oh
---
 README.md | 2 +-
 sh/pre    | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 7a94089..1c8a3f8 100644
--- a/README.md
+++ b/README.md
@@ -372,7 +372,7 @@ $
 
 ### [pre](/sh/pre)
 
-(bash/zsh) dumps all the #defines that `$CC $CFLAGS $LDFLAGS` would result in.
+(bash/zsh) dumps all the #defines that `$CC $CPPFLAGS $CFLAGS $LDFLAGS` would result in.
 
 ```
 $ pre | shuf | head -10
diff --git a/sh/pre b/sh/pre
index 85da5d5..16c4079 100755
--- a/sh/pre
+++ b/sh/pre
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 if [ -n "${ZSH_VERSION:-}" ]; then
-    $CC -dM -E - $=CFLAGS $=LDFLAGS < /dev/null
+    $CC -dM -E - $=CPPFLAGS $=CFLAGS $=LDFLAGS < /dev/null
 else
-    $CC -dM -E - $CFLAGS $LDFLAGS < /dev/null
+    $CC -dM -E - $CPPFLAGS $CFLAGS $LDFLAGS < /dev/null
 fi