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[bpf-next,v2,1/5] selftests: set CC to clang in lib.mk if LLVM is set

Message ID 20210412142910.267222-1-yhs@fb.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series bpf: tools: support build selftests/bpf with clang | expand

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netdev/cc_maintainers warning 11 maintainers not CCed: linux-kselftest@vger.kernel.org netdev@vger.kernel.org kpsingh@kernel.org daniel@iogearbox.net kafai@fb.com clang-built-linux@googlegroups.com ast@kernel.org nathan@kernel.org john.fastabend@gmail.com songliubraving@fb.com shuah@kernel.org
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Commit Message

Yonghong Song April 12, 2021, 2:29 p.m. UTC
selftests/bpf/Makefile includes lib.mk. With the following command
  make -j60 LLVM=1 LLVM_IAS=1  <=== compile kernel
  make -j60 -C tools/testing/selftests/bpf LLVM=1 LLVM_IAS=1 V=1
some files are still compiled with gcc. This patch
fixed lib.mk issue which sets CC to gcc in all cases.

Cc: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
---
 tools/testing/selftests/lib.mk | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index a5ce26d548e4..9a41d8bb9ff1 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -1,6 +1,10 @@ 
 # This mimics the top-level Makefile. We do it explicitly here so that this
 # Makefile can operate with or without the kbuild infrastructure.
+ifneq ($(LLVM),)
+CC := clang
+else
 CC := $(CROSS_COMPILE)gcc
+endif
 
 ifeq (0,$(MAKELEVEL))
     ifeq ($(OUTPUT),)