[tip:perf/core] tools build: Fix cross compile build

[tip-bot for Jiri Olsa]

Commit-ID:  3a70fcd3a4db56731f67f0189514953c74257944
Gitweb:     http://git.kernel.org/tip/3a70fcd3a4db56731f67f0189514953c74257944
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Tue, 13 Oct 2015 14:43:58 +0200
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 13 Oct 2015 11:59:43 -0300

tools build: Fix cross compile build

He Kuang the new fixdep tool breaks cross compiling. The reason is it
wouldn't get compiled under host arch, but under cross arch and failed
to run.

We need to add support for host side tools build, meanwhile disabling
fixdep usage for cross arch builds.

Reported-by: He Kuang <hekuang@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20151013124358.GB9467@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/build/Makefile.include | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/build/Makefile.include b/tools/build/Makefile.include
index 6572bb0..4e09ad6 100644
--- a/tools/build/Makefile.include
+++ b/tools/build/Makefile.include
@@ -1,6 +1,10 @@
 build := -f $(srctree)/tools/build/Makefile.build dir=. obj
 
+ifdef CROSS_COMPILE
+fixdep:
+else
 fixdep:
 	$(Q)$(MAKE) -C $(srctree)/tools/build fixdep
+endif
 
 .PHONY: fixdep
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