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.
