[PATCH] selftests: fix bpf build/test workflow regression when KBUILD_OUTPUT is set

From: Shuah Khan
Date: Fri May 10 2019 - 22:54:17 EST


commit 8ce72dc32578 ("selftests: fix headers_install circular dependency")
broke bpf build/test workflow. When KBUILD_OUTPUT is set, bpf objects end
up in KBUILD_OUTPUT build directory instead of in ../selftests/bpf.

The following bpf workflow breaks when it can't find the test_verifier:

cd tools/testing/selftests/bpf; make; ./test_verifier;

Fix it to set OUTPUT only when it is undefined in lib.mk. It didn't need
to be set in the first place.

Fixes: commit 8ce72dc32578 ("selftests: fix headers_install circular dependency")

Reported-by: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/lib.mk | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 098dd0065fb1..077337195783 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -3,15 +3,9 @@
CC := $(CROSS_COMPILE)gcc

ifeq (0,$(MAKELEVEL))
- ifneq ($(O),)
- OUTPUT := $(O)
- else
- ifneq ($(KBUILD_OUTPUT),)
- OUTPUT := $(KBUILD_OUTPUT)
- else
- OUTPUT := $(shell pwd)
- DEFAULT_INSTALL_HDR_PATH := 1
- endif
+ ifeq ($(OUTPUT),)
+ OUTPUT := $(shell pwd)
+ DEFAULT_INSTALL_HDR_PATH := 1
endif
endif
selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
--
2.17.1