Re: [PATCH bpf-next v2] bpftool: use linux/types.h from source tree for profiler build

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On 3/12/20 3:15 PM, Quentin Monnet wrote:
2020-03-12 14:03 UTC+0100 ~ Tobias Klauser <tklauser@xxxxxxxxxx>
When compiling bpftool on a system where the /usr/include/asm symlink
doesn't exist (e.g. on an Ubuntu system without gcc-multilib installed),
the build fails with:

     CLANG    skeleton/profiler.bpf.o
   In file included from skeleton/profiler.bpf.c:4:
   In file included from /usr/include/linux/bpf.h:11:
   /usr/include/linux/types.h:5:10: fatal error: 'asm/types.h' file not found
   #include <asm/types.h>
            ^~~~~~~~~~~~~
   1 error generated.
   make: *** [Makefile:123: skeleton/profiler.bpf.o] Error 1

This indicates that the build is using linux/types.h from system headers
instead of source tree headers.

To fix this, adjust the clang search path to include the necessary
headers from tools/testing/selftests/bpf/include/uapi and
tools/include/uapi. Also use __bitwise__ instead of __bitwise in
skeleton/profiler.h to avoid clashing with the definition in
tools/testing/selftests/bpf/include/uapi/linux/types.h.

Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Cc: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>
Cc: Quentin Monnet <quentin@xxxxxxxxxxxxx>
Signed-off-by: Tobias Klauser <tklauser@xxxxxxxxxx>

Looks good, thanks!
Reviewed-by: Quentin Monnet <quentin@xxxxxxxxxxxxx>

Applied, thanks (compiles fine over here as well now)!



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