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On some system the perf-config is broken, causes link failure like this: /usr/lib64/python2.7/config/libpython2.7.a(posixmodule.o): In function `posix_forkpty': /opt/wangnan/yocto-build/tmp-eglibc/work/x86_64-oe-linux/python/2.7.3-r0.3.1/Python-2.7.3/./Modules/posixmodule.c:3816: undefined reference to `forkpty' /usr/lib64/python2.7/config/libpython2.7.a(posixmodule.o): In function `posix_openpty': /opt/wangnan/yocto-build/tmp-eglibc/work/x86_64-oe-linux/python/2.7.3-r0.3.1/Python-2.7.3/./Modules/posixmodule.c:3756: undefined reference to `openpty' collect2: error: ld returned 1 exit status make[1]: *** [/home/wangnan/kernel-hydrogen/tools/perf/out/perf] Error 1 make: *** [all] Error 2 $ python-config --libs -lpthread -ldl -lpthread -lutil -lm -lpython2.7 In this case a '-lutil' should be appended to -lpython2.7. (I know we have --start-group and --end-group. I can see them in command line of collect2 by strace. However it doesn't work. Seems I have a broken environment?) Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452520124-2073-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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