[evolution] Disable strict aliasing optimization.
- From: Matthew Barnes <mbarnes src gnome org>
- To: svn-commits-list gnome org
- Cc:
- Subject: [evolution] Disable strict aliasing optimization.
- Date: Tue, 2 Feb 2010 18:11:43 +0000 (UTC)
commit dce48c142cae497ffe518b4a4427df6fac46c398
Author: Matthew Barnes <mbarnes redhat com>
Date: Tue Feb 2 12:21:30 2010 -0500
Disable strict aliasing optimization.
configure.ac | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 732ac2d..b034b76 100644
--- a/configure.ac
+++ b/configure.ac
@@ -89,7 +89,14 @@ dnl -Wmissing-format-attribute
dnl -Wshadow
dnl -Wformat-nonliteral
-AM_CPPFLAGS="$WARNING_FLAGS"
+dnl GCC 4.4 got more aggressive in it's aliasing optimizations, changing
+dnl behavior that -- according to the C99 standard -- is supposed to be
+dnl undefined. We may still have aliasing abuses lying around that rely
+dnl on GCC's previous "undefined" behavior but are hidden by type casts,
+dnl so disable the strict-aliasing optimzation until GCC (or even LLVM)
+dnl learns how to detect them and warn us about it.
+dnl XXX This really belongs in AM_CFLAGS.
+AM_CPPFLAGS="$WARNING_FLAGS -fno-strict-aliasing"
AC_SUBST(AM_CPPFLAGS)
LDFLAGS="$LDFLAGS -Wl,--no-undefined"
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