linux-kernel - [PATCH] samples/bpf: Fix compilation failure for samples/bpf on LoongArch Fedora

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Message-Id: <20250425095042.838824-1-jianghaoran@kylinos.cn>
Date: Fri, 25 Apr 2025 17:50:42 +0800
From: Haoran Jiang <jianghaoran@...inos.cn>
To: linux-kernel@...r.kernel.org
Cc: daniel@...earbox.net,
	ast@...nel.org,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...gle.com,
	haoluo@...gle.com,
	jolsa@...nel.org,
	nathan@...nel.org,
	ndesaulniers@...gle.com,
	trix@...hat.com,
	bpf@...r.kernel.org,
	llvm@...ts.linux.dev,
	chenhuacai@...nel.org,
	yangtiezhu@...ngson.cn,
	zhangxi <zhangxi@...inos.cn>
Subject: [PATCH] samples/bpf: Fix compilation failure for samples/bpf on LoongArch Fedora

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@...inos.cn>
Signed-off-by: zhangxi <zhangxi@...inos.cn>
Change-Id: I5fca6f0cee21e429982c5a3865efc5afeb3fa757
---
 samples/bpf/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 3fa16412db15..927d72659173 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -392,7 +392,7 @@ $(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) $(CLANG_SYS_INCLUDES) \
 		-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
 		-D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
 		-Wno-gnu-variable-sized-type-not-at-end \
-- 
2.25.1