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########################################################################### ###
#@Copyright     Copyright (c) Imagination Technologies Ltd. All Rights Reserved
#@License       Dual MIT/GPLv2
# 
# The contents of this file are subject to the MIT license as set out below.
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# Alternatively, the contents of this file may be used under the terms of
# the GNU General Public License Version 2 ("GPL") in which case the provisions
# of GPL are applicable instead of those above.
# 
# If you wish to allow use of your version of this file only under the terms of
# GPL, and not to allow others to use your version of this file under the terms
# of the MIT license, indicate your decision by deleting the provisions above
# and replace them with the notice and other provisions required by GPL as set
# out in the file called "GPL-COPYING" included in this distribution. If you do
# not delete the provisions above, a recipient may use your version of this file
# under the terms of either the MIT license or GPL.
# 
# This License is also included in this distribution in the file called
# "MIT-COPYING".
# 
# EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
# PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
# BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
### ###########################################################################

$(if $(strip $(KERNELDIR)),,$(error KERNELDIR must be set))
$(call directory-must-exist,$(KERNELDIR))

$(TARGET_OUT)/kbuild/Makefile: $(MAKE_TOP)/kbuild/Makefile.template
	@[ ! -e $(dir $@) ] && mkdir -p $(dir $@) || true
	$(CP) -f $< $@

# We need to make INTERNAL_KBUILD_MAKEFILES absolute because the files will be
# read while chdir'd into $(KERNELDIR)
INTERNAL_KBUILD_MAKEFILES := $(abspath $(foreach _m,$(KERNEL_COMPONENTS) $(EXTRA_PVRSRVKM_COMPONENTS),$(if $(INTERNAL_KBUILD_MAKEFILE_FOR_$(_m)),$(INTERNAL_KBUILD_MAKEFILE_FOR_$(_m)),$(error Unknown kbuild module "$(_m)"))))
INTERNAL_KBUILD_OBJECTS := $(foreach _m,$(KERNEL_COMPONENTS),$(if $(INTERNAL_KBUILD_OBJECTS_FOR_$(_m)),$(INTERNAL_KBUILD_OBJECTS_FOR_$(_m)),$(error BUG: Unknown kbuild module "$(_m)" should have been caught earlier)))
INTERNAL_EXTRA_KBUILD_OBJECTS := $(foreach _m,$(EXTRA_PVRSRVKM_COMPONENTS),$(if $(INTERNAL_KBUILD_OBJECTS_FOR_$(_m)),$(INTERNAL_KBUILD_OBJECTS_FOR_$(_m)),$(error BUG: Unknown kbuild module "$(_m)" should have been caught earlier)))
.PHONY: kbuild kbuild_clean

kbuild: $(TARGET_OUT)/kbuild/Makefile
	@$(MAKE) -Rr --no-print-directory -C $(KERNELDIR) M=$(abspath $(TARGET_OUT)/kbuild) \
		INTERNAL_KBUILD_MAKEFILES="$(INTERNAL_KBUILD_MAKEFILES)" \
		INTERNAL_KBUILD_OBJECTS="$(INTERNAL_KBUILD_OBJECTS)" \
		INTERNAL_EXTRA_KBUILD_OBJECTS="$(INTERNAL_EXTRA_KBUILD_OBJECTS)" \
		EXTRA_KBUILD_SOURCE="$(EXTRA_KBUILD_SOURCE)" \
		CROSS_COMPILE="$(CCACHE) $(KERNEL_CROSS_COMPILE)" \
		EXTRA_CFLAGS="$(ALL_KBUILD_CFLAGS)" \
		V=$(V) W=$(W) \
		TOP=$(TOP)
	@for kernel_module in $(addprefix $(TARGET_OUT)/kbuild/,$(INTERNAL_KBUILD_OBJECTS:.o=.ko)); do \
		cp $$kernel_module $(TARGET_OUT); \
	done

kbuild_clean: $(TARGET_OUT)/kbuild/Makefile
	@$(MAKE) -Rr --no-print-directory -C $(KERNELDIR) M=$(abspath $(TARGET_OUT)/kbuild) \
		INTERNAL_KBUILD_MAKEFILES="$(INTERNAL_KBUILD_MAKEFILES)" \
		INTERNAL_KBUILD_OBJECTS="$(INTERNAL_KBUILD_OBJECTS)" \
		INTERNAL_EXTRA_KBUILD_OBJECTS="$(INTERNAL_EXTRA_KBUILD_OBJECTS)" \
		EXTRA_KBUILD_SOURCE="$(EXTRA_KBUILD_SOURCE)" \
		CROSS_COMPILE="$(CCACHE) $(KERNEL_CROSS_COMPILE)" \
		EXTRA_CFLAGS="$(ALL_KBUILD_CFLAGS)" \
		V=$(V) W=$(W) \
		TOP=$(TOP) clean

kbuild_install: $(TARGET_OUT)/kbuild/Makefile
	@: $(if $(strip $(DISCIMAGE)),,$(error $$(DISCIMAGE) was empty or unset while trying to use it to set INSTALL_MOD_PATH for modules_install))
	@$(MAKE) -Rr --no-print-directory -C $(KERNELDIR) M=$(abspath $(TARGET_OUT)/kbuild) \
		INTERNAL_KBUILD_MAKEFILES="$(INTERNAL_KBUILD_MAKEFILES)" \
		INTERNAL_KBUILD_OBJECTS="$(INTERNAL_KBUILD_OBJECTS)" \
		INTERNAL_EXTRA_KBUILD_OBJECTS="$(INTERNAL_EXTRA_KBUILD_OBJECTS)" \
		EXTRA_KBUILD_SOURCE="$(EXTRA_KBUILD_SOURCE)" \
		CROSS_COMPILE="$(CCACHE) $(KERNEL_CROSS_COMPILE)" \
		EXTRA_CFLAGS="$(ALL_KBUILD_CFLAGS)" \
		INSTALL_MOD_PATH="$(DISCIMAGE)" \
		V=$(V) W=$(W) \
		TOP=$(TOP) modules_install