46 lines
1.7 KiB
Makefile
46 lines
1.7 KiB
Makefile
TEST_KMOD_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST)))))
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SRCTREE_KDIR := $(abspath $(TEST_KMOD_DIR)/../../../../..)
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# Honor O=/KBUILD_OUTPUT only if they point at a prepared kernel build
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# directory (one containing Module.symvers); otherwise treat the value as a
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# selftests-only output directory and fall back to in-tree or distro headers.
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# The parent bpf/Makefile resolves O=/KBUILD_OUTPUT to absolute paths before
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# invoking this sub-make so relative paths still anchor to the user's
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# invocation directory.
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KMOD_O := $(or $(O),$(KBUILD_OUTPUT))
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KMOD_O_VALID := $(if $(KMOD_O),$(if $(wildcard $(KMOD_O)/Module.symvers),$(KMOD_O)))
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KDIR ?= $(if $(KMOD_O_VALID),$(SRCTREE_KDIR), \
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$(if $(wildcard $(SRCTREE_KDIR)/Module.symvers),$(SRCTREE_KDIR), \
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/lib/modules/$(shell uname -r)/build))
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ifeq ($(V),1)
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Q =
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else
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Q = @
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endif
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MODULES = bpf_testmod.ko bpf_test_no_cfi.ko bpf_test_modorder_x.ko \
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bpf_test_modorder_y.ko bpf_test_rqspinlock.ko
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$(foreach m,$(MODULES),$(eval obj-m += $(m:.ko=.o)))
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CFLAGS_bpf_testmod.o = -I$(src)
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# When BPF_STRICT_BUILD != 0, a missing KDIR is fatal (the default).
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# When permissive, skip silently.
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PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD))
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all:
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ifeq ($(PERMISSIVE),)
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$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
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M=$(TEST_KMOD_DIR) modules
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else ifneq ("$(wildcard $(KDIR))", "")
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$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
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M=$(TEST_KMOD_DIR) modules
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endif
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clean:
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ifneq ("$(wildcard $(KDIR))", "")
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$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
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M=$(TEST_KMOD_DIR) clean
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endif
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