From 85a277c6a38e888136e7924459a5ea95f8518525 Mon Sep 17 00:00:00 2001
From: Nils Philippsen <nils@tiptoe.de>
Date: Mon, 28 Oct 2013 09:32:37 +0100
Subject: allow overriding optimization flags completely

If an optimization level ("-O<something>") is present in the argument
for --arch, do not prepend default optimization flags.
---
 wscript | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

(limited to 'wscript')

diff --git a/wscript b/wscript
index 3d016326d5..de83023783 100644
--- a/wscript
+++ b/wscript
@@ -303,13 +303,22 @@ def set_compiler_flags (conf,opt):
     # prepend boiler plate optimization flags that work on all architectures
     #
 
-    optimization_flags[:0] = [
-            "-O3",
-            "-fomit-frame-pointer",
-            "-ffast-math",
-            "-fstrength-reduce",
-            "-pipe"
-            ]
+    optimization_flags[:0] = ["-pipe"]
+
+    # don't prepend optimization flags if "-O<something>" is present
+    prepend_opt_flags = True
+    for flag in optimization_flags:
+        if flag.startswith("-O"):
+            prepend_opt_flags = False
+            break
+
+    if prepend_opt_flags:
+        optimization_flags[:0] = [
+                "-O3",
+                "-fomit-frame-pointer",
+                "-ffast-math",
+                "-fstrength-reduce"
+                ]
 
     if opt.debug:
         conf.env.append_value('CFLAGS', debug_flags)
-- 
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