[Buildroot] [PATCH 2/2] toolchain: Add the possibility to have a mcpu option with wrapper

[Stany MARCEL <stanypub@gmail.com>]

Permit to define the mcpu of the external toolchain wrapper, based on
BR2_GCC_TARGET_CPU.

Signed-off-by: Stany MARCEL <stanypub@gmail.com>
---
 toolchain/toolchain-external/ext-tool.mk           |    6 ++++++
 .../toolchain-external/ext-toolchain-wrapper.c     |    3 +++
 2 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/toolchain/toolchain-external/ext-tool.mk b/toolchain/toolchain-external/ext-tool.mk
index 572917f..640db5e 100644
--- a/toolchain/toolchain-external/ext-tool.mk
+++ b/toolchain/toolchain-external/ext-tool.mk
@@ -129,6 +129,8 @@ TOOLCHAIN_EXTERNAL_WRAPPER_ARGS = \
 CC_TARGET_TUNE_:=$(call qstrip,$(BR2_GCC_TARGET_TUNE))
 CC_TARGET_ARCH_:=$(call qstrip,$(BR2_GCC_TARGET_ARCH))
 CC_TARGET_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_ABI))
+CC_TARGET_CPU_:=$(call qstrip,$(BR2_GCC_TARGET_CPU))
+
 
 # march/mtune/floating point mode needs to be passed to the external toolchain
 # to select the right multilib variant
@@ -144,6 +146,10 @@ ifneq ($(CC_TARGET_ABI_),)
 TOOLCHAIN_EXTERNAL_CFLAGS += -mabi=$(CC_TARGET_ABI_)
 TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ABI='"$(CC_TARGET_ABI_)"'
 endif
+ifneq ($(CC_TARGET_CPU_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mcpu=$(CC_TARGET_CPU_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_CPU='"$(CC_TARGET_CPU_)"'
+endif
 
 ifeq ($(BR2_SOFT_FLOAT),y)
 TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
diff --git a/toolchain/toolchain-external/ext-toolchain-wrapper.c b/toolchain/toolchain-external/ext-toolchain-wrapper.c
index 3e23061..b1a4fcb 100644
--- a/toolchain/toolchain-external/ext-toolchain-wrapper.c
+++ b/toolchain/toolchain-external/ext-toolchain-wrapper.c
@@ -31,6 +31,9 @@ static char *predef_args[] = {
 #ifdef BR_ABI
 	"-mabi=" BR_ABI,
 #endif
+#ifdef BR_CPU
+	"-mcpu=" BR_CPU,
+#endif
 #ifdef BR_SOFTFLOAT
 	"-msoft-float",
 #endif /* BR_SOFTFLOAT */
-- 
1.7.1