build/tools/toolchain-patches/gcc/0001-gcc-4.6-and-4.7-Disable-sincos-optimization.patch

From 504ba0176a97c9b849fd18c4591a2cfc8d5eb130 Mon Sep 17 00:00:00 2001
From: David 'Digit' Turner <digit@google.com>
Date: Wed, 9 May 2012 17:53:13 +0200
Subject: gcc-4.6: Disable sincos optimization

Ensure that sincos optimization is disabled for NDK toolchain
builds. This ensures that NDK-generated code will always link
on legacy Android platforms that don't implement sincos() in
their /system/lib/libm.so.

For the record, this optimization changes the following code:

  double c, s;
  c = cos(angle);
  s = sin(angle);

Into machine code that does:

  double c, s;
  sincos(angle, &s, &c);

Change-Id: I332bf5788267dd56e93b8cdb0cefa04b970eca88
---
 gcc-4.6/gcc/config/linux.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/gcc-4.6/gcc/config/linux.h b/gcc-4.6/gcc/config/linux.h
index 4e21112..025157f 100644
--- a/gcc-4.6/gcc/config/linux.h
+++ b/gcc-4.6/gcc/config/linux.h
@@ -99,7 +99,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
 
 /* Whether we have sincos that follows the GNU extension.  */
-#define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC)
+#define TARGET_HAS_SINCOS (OPTION_GLIBC)
 
 /* Whether we have Bionic libc runtime */
 #undef TARGET_HAS_BIONIC
diff --git a/gcc-4.7/gcc/config/linux.h b/gcc-4.7/gcc/config/linux.h
index fb459e6..bf5993f 100644
--- a/gcc-4.7/gcc/config/linux.h
+++ b/gcc-4.7/gcc/config/linux.h
@@ -103,7 +103,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 /* Whether we have sincos that follows the GNU extension.  */
 #undef TARGET_HAS_SINCOS
-#define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC)
+#define TARGET_HAS_SINCOS (OPTION_GLIBC)
 
 /* Whether we have Bionic libc runtime */
 #undef TARGET_HAS_BIONIC
-- 
1.7.6.rc0