From 77f9d57de4989f5012b1651df6512c4828144d93 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@uclibc-ng.org>
Date: Tue, 16 Feb 2016 22:15:39 +0100
Subject: rework ARM NEON support

Don't build C library with -ffast-math when NEON is globally enabled.
Disable NEON support by default.
Remove dangerous -funsafe-math-optimizations.

Most suggestions from Rich Felker after analyzing libc-test
failures in my setup.
---
 toolchain/musl/Makefile      | 2 ++
 toolchain/uclibc-ng/Makefile | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

(limited to 'toolchain')

diff --git a/toolchain/musl/Makefile b/toolchain/musl/Makefile
index 8390b13a7..0c628806a 100644
--- a/toolchain/musl/Makefile
+++ b/toolchain/musl/Makefile
@@ -12,6 +12,8 @@ endif
 # not yet possible
 TARGET_CFLAGS:=		$(filter-out -fstack-protector-all,$(TARGET_CFLAGS))
 TARGET_LDFLAGS:=	$(filter-out -fstack-protector-all,$(TARGET_LDFLAGS))
+# don't use fast-math for C library
+TARGET_CFLAGS:=         $(filter-out -ffast-math,$(TARGET_CFLAGS))
 
 $(WRKBUILD)/.configured:
 	(cd $(WRKBUILD); CC='$(TARGET_CC)' CROSS_COMPILE='$(TARGET_CROSS)' \
diff --git a/toolchain/uclibc-ng/Makefile b/toolchain/uclibc-ng/Makefile
index 5882dd7e2..981843c82 100644
--- a/toolchain/uclibc-ng/Makefile
+++ b/toolchain/uclibc-ng/Makefile
@@ -9,10 +9,12 @@ include Makefile.inc
 include ${ADK_TOPDIR}/mk/buildhlp.mk
 
 # disable LTO
-TARGET_CFLAGS:=$(filter-out -flto,$(TARGET_CFLAGS))
+TARGET_CFLAGS:=	$(filter-out -flto,$(TARGET_CFLAGS))
 # handled by uClibc-ng makefiles
-TARGET_CFLAGS:=$(filter-out -fstack-protector-all,$(TARGET_CFLAGS))
+TARGET_CFLAGS:=	$(filter-out -fstack-protector-all,$(TARGET_CFLAGS))
 TARGET_LDFLAGS:=$(filter-out -fstack-protector-all,$(TARGET_LDFLAGS))
+# don't use fast-math for C library
+TARGET_CFLAGS:=	$(filter-out -ffast-math,$(TARGET_CFLAGS))
 
 ifeq ($(ADK_TARGET_HARD_FLOAT),y)
 ifeq ($(ADK_TARGET_ARCH_ARM),y)
-- 
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