looks like this issue is rather tricky. adding libunwind to build dependecies actually gives nothing, there is still no dwarf support. Digging deeper I found that following test, which detects libunwind support for perf is not passed:
"gcc -o test-libunwind test-libunwind.c -lunwind -lunwind-x86 -lelf" fails with /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_stream_buffer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_uncompressed_size' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_end' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_buffer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_stream_footer_decode' /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libunwind-x86.so: undefined reference to `lzma_index_size' collect2: error: ld returned 1 exit status adding -llzma to the test above doesn't solve the problem. During further investigation I found that there are problem with libunwind8-dev - its libraries lacks dependant libs. I filed bug on libunwind and proposed solution for x86 platform. Link to the bug is https://bugs.launchpad.net/ubuntu/+source/libunwind/+bug/1336912 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1248289 Title: Missing libunwind support in perf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1248289/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
