561381a146
This change fixes the compilation error triggered here for i386 allmodconfig in linux-next: http://kisskb.ellerman.id.au/kisskb/buildresult/6123842/ Logic attempting to predict the host architecture has been removed from the Makefile. Instead, the bpf-direct sample should now compile on any architecture, but if the architecture is not supported, it will compile a minimal main() function. This change also ensures the samples are not compiled when there is no seccomp filter support. (Note, I wasn't able to reproduce the error locally, but the existing approach was clearly flawed. This tweak should resolve your issue and avoid other future weirdness.) Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Suggested-by: Kees Cook <keescook@chromium.org> Signed-off-by: Will Drewry <wad@chromium.org> Signed-off-by: James Morris <james.l.morris@oracle.com>
33 lines
1 KiB
Makefile
33 lines
1 KiB
Makefile
# kbuild trick to avoid linker error. Can be omitted if a module is built.
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obj- := dummy.o
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hostprogs-$(CONFIG_SECCOMP_FILTER) := bpf-fancy dropper bpf-direct
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HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include
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HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include
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HOSTCFLAGS_bpf-helper.o += -I$(objtree)/usr/include
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HOSTCFLAGS_bpf-helper.o += -idirafter $(objtree)/include
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bpf-fancy-objs := bpf-fancy.o bpf-helper.o
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HOSTCFLAGS_dropper.o += -I$(objtree)/usr/include
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HOSTCFLAGS_dropper.o += -idirafter $(objtree)/include
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dropper-objs := dropper.o
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HOSTCFLAGS_bpf-direct.o += -I$(objtree)/usr/include
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HOSTCFLAGS_bpf-direct.o += -idirafter $(objtree)/include
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bpf-direct-objs := bpf-direct.o
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# Try to match the kernel target.
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ifeq ($(CONFIG_64BIT),)
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HOSTCFLAGS_bpf-direct.o += -m32
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HOSTCFLAGS_dropper.o += -m32
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HOSTCFLAGS_bpf-helper.o += -m32
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HOSTCFLAGS_bpf-fancy.o += -m32
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HOSTLOADLIBES_bpf-direct += -m32
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HOSTLOADLIBES_bpf-fancy += -m32
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HOSTLOADLIBES_dropper += -m32
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endif
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# Tell kbuild to always build the programs
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always := $(hostprogs-y)
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