On Thu, 28 Oct 2021 at 15:20, Björn Töpel <bjorn@xxxxxxxxxx> wrote:
>
> This patch is closely related to commit 6016df8fe874 ("selftests/bpf:
> Fix broken riscv build"). When clang includes the system include
> directories, but targeting BPF program, __BITS_PER_LONG defaults to
> 32, unless explicitly set. Workaround this problem, by explicitly
> setting __BITS_PER_LONG to __riscv_xlen.
>
> Signed-off-by: Björn Töpel <bjorn@xxxxxxxxxx>
> ---
> tools/testing/selftests/bpf/Makefile | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index ac47cf9760fc..d739e62d0f90 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -277,7 +277,8 @@ $(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \
> define get_sys_includes
> $(shell $(1) -v -E - </dev/null 2>&1 \
> | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
> -$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
> +$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
> +
Argh, this messes things up. I'll spin a v2 with the extra NL removed.
Björn
> endef
>
> # Determine target endianness.
> --
> 2.32.0
>
