From 7b01dd5793394ee2ef47c328b28c30f5c01107c9 Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Thu, 28 Apr 2016 14:20:58 +0200 Subject: 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 Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/Makefile | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'samples/bpf') 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. -- cgit