linux-kernel - [PATCH 2/4] samples/bpf: Use llc in PATH, rather than a hardcoded value

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Date:	Thu, 31 Mar 2016 16:55:42 +0530
From:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:	Alexei Starovoitov <ast@...com>,
	"David S . Miller" <davem@...emloft.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 2/4] samples/bpf: Use llc in PATH, rather than a hardcoded value

While at it, fix some typos in the comment.

Cc: Alexei Starovoitov <ast@...com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Signed-off-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
---
 samples/bpf/Makefile | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 502c9fc..88bc5a0 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -76,16 +76,13 @@ HOSTLOADLIBES_offwaketime += -lelf
 HOSTLOADLIBES_spintest += -lelf
 HOSTLOADLIBES_map_perf_test += -lelf -lrt
 
-# point this to your LLVM backend with bpf support
-LLC=$(srctree)/tools/bpf/llvm/bld/Debug+Asserts/bin/llc
-
-# asm/sysreg.h inline assmbly used by it is incompatible with llvm.
-# But, ehere is not easy way to fix it, so just exclude it since it is
+# 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.
 $(obj)/%.o: $(src)/%.c
 	clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
 		-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
+		-O2 -emit-llvm -c $< -o -| llc -march=bpf -filetype=obj -o $@
 	clang $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
 		-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
-		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=asm -o $@.s
+		-O2 -emit-llvm -c $< -o -| llc -march=bpf -filetype=asm -o $@.s
-- 
2.7.4