From 2b2b799a233882af184aeb599e334affe10d5a24 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 29 Apr 2014 15:02:34 -0600
Subject: [PATCH] ARMv7-M:  Add FPU-related CFLAG settings for the CodeSourcery
 of Linux toolchain

---
 arch/arm/src/armv7-m/Toolchain.defs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/src/armv7-m/Toolchain.defs b/arch/arm/src/armv7-m/Toolchain.defs
index a698d6cacc..c2c40c33dc 100644
--- a/arch/arm/src/armv7-m/Toolchain.defs
+++ b/arch/arm/src/armv7-m/Toolchain.defs
@@ -209,8 +209,16 @@ endif
 ifeq ($(CONFIG_ARMV7M_TOOLCHAIN),CODESOURCERYL)
   CROSSDEV ?= arm-none-eabi-
   ARCROSSDEV ?= arm-none-eabi-
-  ARCHCPUFLAGS = -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
   MAXOPTIMIZATION ?= -O2
+  ifeq ($(CONFIG_ARCH_CORTEXM4),y)
+    ifeq ($(CONFIG_ARCH_FPU),y)
+      ARCHCPUFLAGS = -mcpu=cortex-m4 -mthumb -march=armv7e-m -mfpu=fpv4-sp-d16 -mfloat-abi=hard
+    else
+      ARCHCPUFLAGS = -mcpu=cortex-m4 -mthumb -march=armv7e-m -mfloat-abi=soft
+    endif
+  else ifeq ($(CONFIG_ARCH_CORTEXM3),y)
+    ARCHCPUFLAGS = -mcpu=cortex-m3 -mthumb -mfloat-abi=soft
+  endif
 endif
 
 # CodeSourcery under Windows