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| author | Abhijit Ayarekar <abhijit.ayarekar@caviumnetworks.com> | 2017-10-13 12:24:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-16 21:04:32 +0100 |
| commit | 9db9583839b760fc492a7b288edfe2213184a579 (patch) | |
| tree | ba6249a97b191b520e42d10352940e0e437dcc2e /samples/bpf/Makefile | |
| parent | 745482e0c03793522fa19f06e6249b521d6adca1 (diff) | |
| download | lwn-9db9583839b760fc492a7b288edfe2213184a579.tar.gz lwn-9db9583839b760fc492a7b288edfe2213184a579.zip | |
bpf: Add -target to clang switch while cross compiling.
Update to llvm excludes assembly instructions.
llvm git revision is below
commit 65fad7c26569 ("bpf: add inline-asm support")
This change will be part of llvm release 6.0
__ASM_SYSREG_H define is not required for native compile.
-target switch includes appropriate target specific files
while cross compiling
Tested on x86 and arm64.
Signed-off-by: Abhijit Ayarekar <abhijit.ayarekar@caviumnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples/bpf/Makefile')
| -rw-r--r-- | samples/bpf/Makefile | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index ebc2ad69b62c..81f9fcd736b7 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -180,6 +180,7 @@ CLANG ?= clang # Detect that we're cross compiling and use the cross compiler ifdef CROSS_COMPILE HOSTCC = $(CROSS_COMPILE)gcc +CLANG_ARCH_ARGS = -target $(ARCH) endif # Trick to allow make to be run from this directory @@ -229,9 +230,9 @@ $(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h $(obj)/%.o: $(src)/%.c $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \ -I$(srctree)/tools/testing/selftests/bpf/ \ - -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ + -D__KERNEL__ -Wno-unused-value -Wno-pointer-sign \ -D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \ -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ - -Wno-unknown-warning-option \ + -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@ |