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| author | Jesper Dangaard Brouer <brouer@redhat.com> | 2016-04-28 14:20:58 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-29 20:25:32 +0200 |
| commit | 7b01dd5793394ee2ef47c328b28c30f5c01107c9 (patch) | |
| tree | 8ec412e7697255f51eae0cebd92600cbbbfd8dbb /samples | |
| parent | samples/bpf: add back functionality to redefine LLC command (diff) | |
| download | linux-7b01dd5793394ee2ef47c328b28c30f5c01107c9.tar.xz linux-7b01dd5793394ee2ef47c328b28c30f5c01107c9.zip | |
samples/bpf: Makefile verify LLVM compiler avail and bpf target is supported
Make compiling samples/bpf more user friendly, by detecting if LLVM
compiler tool 'llc' is available, and also detect if the 'bpf' target
is available in this version of LLVM.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/Makefile | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 5bae9536f100..45859c99f573 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -85,6 +85,24 @@ HOSTLOADLIBES_test_overhead += -lelf -lrt # make samples/bpf/ LLC=~/git/llvm/build/bin/llc LLC ?= llc +# Verify LLVM compiler is available and bpf target is supported +.PHONY: verify_cmd_llc verify_target_bpf + +verify_cmd_llc: + @if ! (which "${LLC}" > /dev/null 2>&1); then \ + echo "*** ERROR: Cannot find LLVM tool 'llc' (${LLC})" ;\ + exit 1; \ + else true; fi + +verify_target_bpf: verify_cmd_llc + @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \ + echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\ + echo " NOTICE: LLVM version >= 3.7.1 required" ;\ + exit 2; \ + else true; fi + +$(src)/*.c: verify_target_bpf + # asm/sysreg.h - inline assembly used by it is incompatible with llvm. # But, there is no easy way to fix it, so just exclude it since it is # useless for BPF samples. |