From 334b154eef7e858daf41507c335cce7ecb7c2e39 Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Tue, 1 Nov 2016 22:50:15 -0400
Subject: [PATCH] [SCons] Prevent full rebuild after change to precompiled
 header

---
 src/SConscript | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/SConscript b/src/SConscript
index 7bd323b76..2107c7c00 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -41,9 +41,6 @@ if env['use_pch']:
         localenv['precompiled_header'] = File('#include/cantera/base/system.h')
         pch = localenv.GchSh('#include/cantera/base/system.h.gch',
                               localenv['precompiled_header'])
-        # # To force early compilaton of the precompiled header
-        # localenv.Depends(env['config_h_target'], pch)
-
 else:
     removeFile('include/cantera/base/system.h.gch')
     env['pch_flags'] = []
@@ -55,7 +52,7 @@ for subdir, extensions, setup in libs:
     objects = env2.SharedObject(source)
     env2.Depends(objects, env2['config_h_target'])
     if pch:
-        env2.Depends(objects, pch)
+        env2.Requires(objects, pch)
     libraryTargets.extend(objects)