Re: [PATCH v2] samples/bpf: Fix compilation failure for samples/bpf on LoongArch Fedora

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On 7/10/23 7:54 AM, Huacai Chen wrote:
Reviewed-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>

On Mon, Jul 10, 2023 at 1:34 PM Haoran Jiang <jianghaoran@xxxxxxxxxx> wrote:

When building the latest samples/bpf on LoongArch Fedora

      make M=samples/bpf

There are compilation errors as follows:

In file included from ./linux/samples/bpf/sockex2_kern.c:2:
In file included from ./include/uapi/linux/in.h:25:
In file included from ./include/linux/socket.h:8:
In file included from ./include/linux/uio.h:9:
In file included from ./include/linux/thread_info.h:60:
In file included from ./arch/loongarch/include/asm/thread_info.h:15:
In file included from ./arch/loongarch/include/asm/processor.h:13:
In file included from ./arch/loongarch/include/asm/cpu-info.h:11:
./arch/loongarch/include/asm/loongarch.h:13:10: fatal error: 'larchintrin.h' file not found
          ^~~~~~~~~~~~~~~
1 error generated.

larchintrin.h is included in /usr/lib64/clang/14.0.6/include,
and the header file location is specified at compile time.

Test on LoongArch Fedora:
https://github.com/fedora-remix-loongarch/releases-info

Signed-off-by: Haoran Jiang <jianghaoran@xxxxxxxxxx>

---
v2:
use LoongArch instead of Loongarch in the title and commit message.
---
  samples/bpf/Makefile | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 615f24ebc49c..b301796a3862 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -434,7 +434,7 @@ $(obj)/%.o: $(src)/%.c
         @echo "  CLANG-bpf " $@
         $(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
                 -I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
-               -I$(LIBBPF_INCLUDE) \
+               -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \

There's still one location in XDP_SAMPLE_CFLAGS, do we need the $(CLANG_SYS_INCLUDES)
there as well?

                 -D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
                 -D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
                 -Wno-gnu-variable-sized-type-not-at-end \
--
2.27.0







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