From 13c05ef5a633d3779e4b1b01a0306755e27c2c4b Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 3 Jun 2019 11:49:46 +0200
Subject: Add note on GCC options

---
 build2/cc/compile-rule.cxx | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'build2')

diff --git a/build2/cc/compile-rule.cxx b/build2/cc/compile-rule.cxx
index bdfa0f0..94e50cd 100644
--- a/build2/cc/compile-rule.cxx
+++ b/build2/cc/compile-rule.cxx
@@ -4005,6 +4005,8 @@ namespace build2
               {
                 if (ctype == compiler_type::gcc)
                 {
+                  // Note that only these two *plus* -x do the trick.
+                  //
                   args.push_back ("-fpreprocessed");
                   args.push_back ("-fdirectives-only");
                 }
-- 
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