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Subject[PATCH] perf build: Do not fail on missing Build file
Date
Allow nesting into directories without Build file. Currently we
force include of the Build file, which fails the build when the
Build file is missing.

We already support empty *-in.o' objects if there's nothing in
the directory to be compiled, so we can just use it for missing
Build file cases.

Also adding this case under tests.

Reported-by: Rabin Vincent <rabin.vincent@axis.com>
Link: http://lkml.kernel.org/n/tip-1pymrh6kezvfqdvkfdc1s4xx@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/build/Makefile.build | 2 +-
tools/build/tests/ex/Build | 1 +
tools/build/tests/ex/empty2/README | 2 ++
3 files changed, 4 insertions(+), 1 deletion(-)
create mode 100644 tools/build/tests/ex/empty2/README

diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
index 10df57237a66..69c35cf09cad 100644
--- a/tools/build/Makefile.build
+++ b/tools/build/Makefile.build
@@ -37,7 +37,7 @@ subdir-obj-y :=

# Build definitions
build-file := $(dir)/Build
-include $(build-file)
+-include $(build-file)

quiet_cmd_flex = FLEX $@
quiet_cmd_bison = BISON $@
diff --git a/tools/build/tests/ex/Build b/tools/build/tests/ex/Build
index 0e6c3e6767e6..70d876237c57 100644
--- a/tools/build/tests/ex/Build
+++ b/tools/build/tests/ex/Build
@@ -2,6 +2,7 @@ ex-y += ex.o
ex-y += a.o
ex-y += b.o
ex-y += empty/
+ex-y += empty2/

libex-y += c.o
libex-y += d.o
diff --git a/tools/build/tests/ex/empty2/README b/tools/build/tests/ex/empty2/README
new file mode 100644
index 000000000000..2107cc5bf5a9
--- /dev/null
+++ b/tools/build/tests/ex/empty2/README
@@ -0,0 +1,2 @@
+This directory is left intentionally without Build file
+to test proper nesting into Build-less directories.
--
1.9.3


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