[ +acme ] On 3/13/20 5:52 PM, Andrii Nakryiko wrote:
On Fri, Mar 13, 2020 at 4:31 AM Tobias Klauser <tklauser@xxxxxxxxxx> wrote:Commit fe4eb069edb7 ("bpftool: Use linux/types.h from source tree for profiler build") added a build dependency on tools/testing/selftests/bpf to tools/bpf/bpftool. This is suboptimal with respect to a possible stand-alone build of bpftool. Fix this by moving tools/testing/selftests/bpf/include/uapi/linux/types.h to tools/include/uapi/linux/types.h This requires an adjustment in the include search path order for the tests in tools/testing/selftests/bpf so that tools/include/linux/types.h is selected when building host binaries and tools/include/uapi/linux/types.h is selected when building bpf binaries. Verified by compiling bpftool and the bpf selftests on x86_64 with this change.Thanks for following up! My only concern is that tools/include/uapi/ is also used at least by perf and libperf, we need to double check that they are fine with this as well. Given this is needed for BPF target compilation only, one way to limit the scope of this change would be to have a `#if defined(__bpf__)` check and falling back to "normal" uapi/linux/types.h. Alternatively, we could have a bpf-specific subdirectory and put this header into tools/include/bpf/uapi/linux/types.h. I don't have any strong preferences, whatever maintainers are happy with.
I would prefer to keep it generic if possible before we take measures of making special cases for bpf in tools include infra. Compilation of perf and libperf seems fine on my side as well, so I've applied it, thanks!
