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authorShuah Khan <skhan@linuxfoundation.org>2019-09-26 19:13:44 -0600
committerDaniel Borkmann <daniel@iogearbox.net>2019-09-30 10:53:34 +0200
commit55d554f5d14071f7c2c5dbd88d0a2eb695c97d16 (patch)
tree85687b7767bf1c94f63f8c4d7944068e19dfca84 /tools/bpf
parent02dc96ef6c25f990452c114c59d75c368a1f4c8f (diff)
tools: bpf: Use !building_out_of_srctree to determine srctree
make TARGETS=bpf kselftest fails with: Makefile:127: tools/build/Makefile.include: No such file or directory When the bpf tool make is invoked from tools Makefile, srctree is cleared and the current logic check for srctree equals to empty string to determine srctree location from CURDIR. When the build in invoked from selftests/bpf Makefile, the srctree is set to "." and the same logic used for srctree equals to empty is needed to determine srctree. Check building_out_of_srctree undefined as the condition for both cases to fix "make TARGETS=bpf kselftest" build failure. Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20190927011344.4695-1-skhan@linuxfoundation.org
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/Makefile6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/bpf/Makefile b/tools/bpf/Makefile
index fbf5e4a0cb9c..5d1995fd369c 100644
--- a/tools/bpf/Makefile
+++ b/tools/bpf/Makefile
@@ -12,7 +12,11 @@ INSTALL ?= install
CFLAGS += -Wall -O2
CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/include/uapi -I$(srctree)/include
-ifeq ($(srctree),)
+# This will work when bpf is built in tools env. where srctree
+# isn't set and when invoked from selftests build, where srctree
+# is set to ".". building_out_of_srctree is undefined for in srctree
+# builds
+ifndef building_out_of_srctree
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif