Messages in this thread | | | Subject | Re: [PATCH v4 2/6] perf tools: Promote proper messages for cross-platform unwind | From | Hekuang <> | Date | Fri, 20 May 2016 10:59:05 +0800 |
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hi
在 2016/5/20 0:46, Jiri Olsa 写道: > On Thu, May 19, 2016 at 11:47:38AM +0000, He Kuang wrote: > > SNIP > >> #endif /* ARCH_PERF_COMMON_H */ >> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile >> index 1e46277..a86b864 100644 >> --- a/tools/perf/config/Makefile >> +++ b/tools/perf/config/Makefile >> @@ -345,6 +345,12 @@ ifeq ($(ARCH),powerpc) >> endif >> >> ifndef NO_LIBUNWIND >> + ifeq ($(feature-libunwind-x86), 1) >> + LIBUNWIND_LIBS += -lunwind-x86 >> + $(call detected,CONFIG_LIBUNWIND_X86) >> + CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT >> + endif >> + > how does one install that lirary? > > thanks, > jirka
My work environment is on an old suse distribution, so it's difficult to find libunwind-$arch rpm packages, so I build them from source.
The git repository url is here: http://git.savannah.gnu.org/r/libunwind.git(master)
Then flow the build step in README, first for i686:
$ ./autogen.sh $ ./configure prefix=/xx/dst_i686 --target=i686-oe-linux CC=x86_64-oe-linux-gcc $ make && make install
Similar for aarch64:
$ make clean $ ./configure prefix=/xx/dst_aarch64 --target=i686-oe-linux CC=x86_64-oe-linux-gcc $ make && make install
NOTICE: the contents in '--target' should be like 'i686-oe-linux', only give 'i686' cause strange build errors.
It looks like that libunwind don't support building for multiple platforms at the same time, so I build them separately into different directories.
Finally, copy the outputs into /usr/include and /usr/lib64, now perf can detect them:
$ make VF=1 ARCH=x86_64 CROSS_COMPILE=x86_64-oe-linux- EXTRA_CFLAGS="-m64" ...
... libunwind-x86: [ on ] ... libunwind-x86_64: [ OFF ] ... libunwind-arm: [ OFF ] ... libunwind-aarch64: [ on ]
Thanks.
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