clang may come with stack protector enabled by default, which caused
compilation errors for BPF programs:
FAILED: utils/keytable/bpf_protocols/grundig.o
/usr/lib/llvm/15/bin/clang -idirafter /usr/lib/llvm/15/bin/../../../../lib/clang/15.0.6/include -idirafter /usr/local/include -idirafter /usr/include -D__linux__ -target bpf -O2 -c ../../utils/keytable/bpf_protocols/grundig.c -o utils/keytable/bpf_protocols/grundig.o
../../utils/keytable/bpf_protocols/grundig.c:50:5: error: A call to built-in function '__stack_chk_fail' is not supported.
int bpf_decoder(unsigned int *sample)
^
1 error generated.
Disable the stack protector to fix this, as recommended in [1].
[1] https://www.spinics.net/lists/netdev/msg556400.html
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
utils/keytable/bpf_protocols/Makefile.am | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/utils/keytable/bpf_protocols/Makefile.am b/utils/keytable/bpf_protocols/Makefile.am
index 13be2794791b..6096c0de5813 100644
--- a/utils/keytable/bpf_protocols/Makefile.am
+++ b/utils/keytable/bpf_protocols/Makefile.am
@@ -8,7 +8,7 @@ CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
%.o: %.c bpf_helpers.h
- $(CLANG) $(CLANG_SYS_INCLUDES) -D__linux__ -I$(top_srcdir)/include -target bpf -O2 -c $<
+ $(CLANG) $(CLANG_SYS_INCLUDES) -D__linux__ -I$(top_srcdir)/include -target bpf -fno-stack-protector -O2 -c $<
PROTOCOLS = grundig.o pulse_distance.o pulse_length.o rc_mm.o manchester.o xbox-dvd.o imon_rsc.o raw.o samsung36.o
--
Regards,
Laurent Pinchart
