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-rw-r--r--tools/Makefile12
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/Makefile b/tools/Makefile
index 01995cc8ac44..b35102721cbb 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,3 +1,8 @@
+# Some of the tools (perf) use same make variables
+# as in kernel build.
+export srctree=
+export objtree=
+
include scripts/Makefile.include
help:
@@ -50,8 +55,13 @@ liblockdep: FORCE
libapi: FORCE
$(call descend,lib/api)
+# The perf build does not follow the descend function setup,
+# invoking it via it's own make rule.
+PERF_O = $(if $(O),$(O)/tools/perf,)
+
perf: FORCE
- $(call descend,$@)
+ $(Q)mkdir -p $(PERF_O) .
+ $(Q)$(MAKE) --no-print-directory -C perf O=$(PERF_O) subdir=
selftests: FORCE
$(call descend,testing/$@)