Currently, the python-host.mk framework relies on HOST_BUILD_PREFIX to
refer to the $(STAGING_DIR)/host directory but using the HOST_BUILD_PREFIX
variable requires the use of include/host-build.mk which in turn includes
python-host.mk, leading to target redefinition errors.
In order to provide a global, uniform way to refer to the host staging
directory, LEDE introduced a new variable STAGING_DIR_HOSTPKG which points
to $(STAGING_DIR)/host for now with the purpose of eventually being able to
relocate that directory in the future.
This commit changes python-host.mk to ...
- stop including include/host-build.mk (revert of #3423)
- replace usages of $(HOST_BUILD_PREFIX) with $(STAGING_DIR_HOSTPKG)
- warn and fallback to $(STAGING_DIR)/host if STAGING_DIR_HOSTPKG is
unavailable
The fallback code will ensure that the python host build infrastructure
continues to work properly on older OpenWrt and LEDE versions until the
STAGING_DIR_HOSTPKG is fully settled in and can be removed some time
in the future.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
73b7f55424