From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Tue, 1 Feb 2000 09:51:19 +0000 (+0000)
Subject: Add -fstrict-aliasing to the flags in optimized mode.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b28fc94df72a6da4aaac0f7e43da1542f5a510da;p=dealii-svn.git

Add -fstrict-aliasing to the flags in optimized mode.


git-svn-id: https://svn.dealii.org/trunk@2301 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/common/Make.global_options.in b/deal.II/common/Make.global_options.in
index 3e3b9fba49..efd0700a7c 100644
--- a/deal.II/common/Make.global_options.in
+++ b/deal.II/common/Make.global_options.in
@@ -112,6 +112,17 @@ ifneq ($(OS),Linux)
 endif
 
 
+
+# after egcs1.1, the optimization flag -fstrict-aliasing was
+# introduced, which enables better optimizations for well-written C++
+# code. we believe that deal.II falls into that category and thusly
+# enable the flag
+ifneq ($(GXX-Version),egcs1.1)
+  CXXFLAGS.o += -fstrict-aliasing
+endif
+
+
+
 # if --enable-multithreading was given, then set the compiler flags
 # accordingly. note that this only sets the flags to generate programs
 # which use thread-safe allocation functions, include the right files,