tree dd6f7da77ae75373875e567318bb9e1737035d90
parent d99827351564b8a6ae06ac38c1c1f613ec5fdda7
author Bryan O'Donoghue <bryan.odonoghue@linaro.org> 1523462991 +0100
committer Jérôme Forissier <jerome.forissier@linaro.org> 1524149787 +0200

host/Makefiles: Allow CC variable to be derived from env

When cross compiling with bitbake we only want to set CC if the env hasn't
already set it.

Change the host Makefiles to only assign CC and friends if-and-only-if not
already set by the environment.

As an example bitbake for the NXP WaRP7 will set

CROSS_COMPILE=arm-oe-linux-gnueabi-

and

CC=arm-oe-linux-gnueabi-gcc  -march=armv7ve -marm -mfpu=neon
-mfloat-abi=hard -mcpu=cortex-a7
--sysroot=/opt/oecore-x86_64/sysroots/cortexa7hf-neon-oe-linux-gnueabi

Thus allowing for the user-space compliation to pick-up the necessary float
and sysroot parameters.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>