linux-kernel - [PATCH tip/perf/core] tools lib traceevent: Fix python/perf.so compiling error

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Message-ID: <1434079031-123162-1-git-send-email-wangnan0@huawei.com>
Date:	Fri, 12 Jun 2015 03:17:11 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	<hekuang@...wei.com>, <jolsa@...nel.org>, <acme@...hat.com>
CC:	<a.p.zijlstra@...llo.nl>, <lizefan@...wei.com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH tip/perf/core] tools lib traceevent: Fix python/perf.so compiling error

'make build-test' finds an error that make_python_perf_so fails due to
missing of libtraceevent-dynamic-list:

 '.../python2' util/setup.py \
   --quiet build_ext; \
   mkdir -p python && \
   cp python_ext_build/lib/perf.so python/
   /path/to/ld: cannot open linker script file /path/to/kernel/tools/lib/traceevent/libtraceevent-dynamic-list: No such file or directory
   collect2: error: ld returned 1 exit status
   error: command 'x86_64-linux-gcc' failed with exit status 1
   cp: cannot stat 'python_ext_build/lib/perf.so': No such file or directory
   make[3]: *** [python/perf.so] Error 1
   make[2]: *** [python/perf.so] Error 2
     test: test -f ./python/perf.so
     make[1]: *** [make_python_perf_so] Error 1
     make: *** [build-test] Error 2
     make: Leaving directory `/path/to/kernel/tools/perf'

This is caused by commit e3d09ec8126fe2c9a3ade661e2126e215ca27a80
("tools lib traceevent: Export dynamic symbols used by traceevent
plugins") that, it adds the list file to LDFLAGS but forgot to add it
to dependency list of python/perf.so.

This patch fixes this problem.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
---
 tools/perf/Makefile.perf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 280c4c6..ec2ed6e 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -195,7 +195,7 @@ python-clean := $(call QUIET_CLEAN, python) $(RM) -r $(PYTHON_EXTBUILD) $(OUTPUT
 PYTHON_EXT_SRCS := $(shell grep -v ^\# util/python-ext-sources)
 PYTHON_EXT_DEPS := util/python-ext-sources util/setup.py $(LIBTRACEEVENT) $(LIBAPI)
 
-$(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS)
+$(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) $(LIBTRACEEVENT_DYNAMIC_LIST)
 	$(QUIET_GEN)CFLAGS='$(CFLAGS)' $(PYTHON_WORD) util/setup.py \
 	  --quiet build_ext; \
 	mkdir -p $(OUTPUT)python && \
-- 
1.8.3.4

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