This commit modifies the toolchain-wrapper to make sure that the
CCACHE_COMPILERCHECK and CCACHE_BASEDIR are only set if ccache support
is enabled. Indeed, when BR2_USE_CCACHE is not set (or to a value
different than 1), we don't call the compiler with ccache, so there is
no reason to set those ccache environment variables, and they could
potentially conflict with a separate usage of ccache, outside of
Buildroot, for example when using the Buildroot SDK.
In particular, the value of CCACHE_BASEDIR doesn't not make any sense
when the Buildroot toolchain is not used during the Buildroot build,
as it points to the output directory $(BASE_DIR).
We pay attention to also not show those variables as being set in the
BR2_DEBUG_WRAPPER dump.
To help a little bit with this, a ccache_enabled boolean is introduced
to indicate when ccache is being used.
There is still quite a bit of #ifdef-ery involved, but it's not easy
to find a simpler way to organize the code.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Tested-By: Vincent Fazio <vfazio@xes-inc.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
231d00e63a