77 lines
1.9 KiB
Makefile
77 lines
1.9 KiB
Makefile
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#
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# $Copyright: Copyright 2018-2020 Broadcom. All rights reserved.
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# The term 'Broadcom' refers to Broadcom Inc. and/or its subsidiaries.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# version 2 as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# A copy of the GNU General Public License version 2 (GPLv2) can
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# be found in the LICENSES folder.$
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#
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# Shared makefile include for building Linux kernel modules.
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#
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# KDIR must point to the Linux kernel sources
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ifndef KDIR
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nokdir:; @echo 'The $$KDIR variable is not set'; exit 1
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endif
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# Required for older kernels
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export EXTRA_CFLAGS = $(ccflags-y)
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PWD := $(shell pwd)
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ifneq ($(LKM_BLDDIR),)
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#
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# If a build directory has been specified, then we symlink all sources
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# to this directory and redirect the module build path.
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#
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# Note that the KBUILD_OUTPUT variable cannot be used to redirect the
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# output as we want it.
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#
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MDIR = $(LKM_BLDDIR)
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MSRCS = $(patsubst %.o,%.c,$($(MOD_NAME)-y))
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MSRCS += Makefile Kbuild
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BSRCS = $(addprefix $(PWD)/,$(MSRCS))
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else
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#
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# Build in current directory by default.
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#
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MDIR = $(PWD)
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endif
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all:
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$(Q)echo Building kernel module $(MOD_NAME)
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ifneq ($(LKM_BLDDIR),)
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ifneq ($(LKM_BLDDIR),$(PWD))
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$(Q)mkdir -p $(MDIR)
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(cd $(MDIR); \
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rm -rf *.c Makefile Kbuild; \
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for f in $(BSRCS); do \
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ln -s $$f; \
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done)
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endif
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endif
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$(MAKE) -C $(KDIR) M=$(MDIR)
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clean::
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$(Q)echo Cleaning kernel module $(MOD_NAME)
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$(MAKE) -C $(KDIR) M=$(MDIR) clean
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ifneq ($(LKM_BLDDIR),)
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ifneq ($(LKM_BLDDIR),$(PWD))
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# Remove all files except for Makefile (needed by 'make clean')
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rm -f $(LKM_BLDDIR)/*[cdors]
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endif
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endif
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.PHONY: all clean
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# Standard documentation targets
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-include $(SDK)/make/doc.mk
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