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selftests/bpf: Fix cross-compiling urandom_read

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Linking of urandom_read and liburandom_read.so prefers LLVM's 'ld.lld' but
falls back to using 'ld' if unsupported. However, this fallback discards
any existing makefile macro for LD and can break cross-compilation.

Fix by changing the fallback to use the target linker $(LD), passed via
'-fuse-ld=' using an absolute path rather than a linker "flavour".

Fixes: 08c79c9cd6 ("selftests/bpf: Don't force lld on non-x86 architectures")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241009040720.635260-1-tony.ambardar@gmail.com
This commit is contained in:
Tony Ambardar 2024-10-08 21:07:20 -07:00 committed by Andrii Nakryiko
parent 3f2ac59c0d
commit fd526e121c
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/bpf/Makefile
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@ -264,7 +264,7 @@ $(OUTPUT)/%:%.c
ifeq ($(SRCARCH),$(filter $(SRCARCH),x86 riscv))
LLD := lld
else
LLD := ld
LLD := $(shell command -v $(LD))
endif
# Filter out -static for liburandom_read.so and its dependent targets so that static builds