Public bug reported: It started in this question https://answers.launchpad.net/ubuntu/+source/python2.7/+question/291321 A program linkedagainst libpython2.7 will still fail to find symbols defined there. It seems libpython2.7 is not compiled using enable-shared.
Very similar to the problem described here https://bugs.kde.org/show_bug.cgi?id=330032 By adding LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 in our environment before running the program solves the issue but this is not a solution, just a workaround. The thing is that in Debian this doesn't happen, but it also happens in Fedora https://bitbucket.org/mtmiller/pytave/issues/3/dlopen-hack > uname -a Linux AsusK55VJ-ubuntu 4.2.0-35-generic #40-Ubuntu SMP Tue Mar 15 22:15:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux > lsb_release -crid Distributor ID: Ubuntu Description: Ubuntu 15.10 Release: 15.10 Codename: wily > grep libpython2.7 /etc/ld.so.cache Binary file /etc/ld.so.cache matches > grep x86_64-linux-gnu /etc/ld.so.conf nothing > ls -l /usr/lib/x86_64-linux-gnu/libpython2.7* lrwxrwxrwx 1 root root 51 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.a -> ../python2.7/config-x86_64-linux-gnu/libpython2.7.a lrwxrwxrwx 1 root root 19 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so -> libpython2.7_d.so.1 lrwxrwxrwx 1 root root 21 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so.1 -> libpython2.7_d.so.1.0 -rw-r--r-- 1 root root 6733568 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so.1.0 lrwxrwxrwx 1 root root 17 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so -> libpython2.7.so.1 lrwxrwxrwx 1 root root 19 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1 -> libpython2.7.so.1.0 -rw-r--r-- 1 root root 3574616 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 And just to ratify that the library we build indeed is linked against libpython ldd pyeval.oct | grep python libboost_python-py27.so.1.58.0 => /usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0 (0x00007f907b7ce000) libpython2.7.so.1.0 => /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 (0x00007f907b254000) Thanks ** Affects: python2.7 (Ubuntu) Importance: Undecided Status: New ** Description changed: It started in this question https://answers.launchpad.net/ubuntu/+source/python2.7/+question/291321 A program linkedagainst libpython2.7 will still fail to find symbols defined there. It seems libpython2.7 is not compiled using enable-shared. Very similar to the problem described here https://bugs.kde.org/show_bug.cgi?id=330032 By adding LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 in our environment before running the program solves the issue but this is not a solution, just a workaround. - The thing is that in Debian this doesn't happen (currently testing on Ubuntu vivid), but it also happens in Fedora + The thing is that in Debian this doesn't happen, but it also happens in Fedora https://bitbucket.org/mtmiller/pytave/issues/3/dlopen-hack > uname -a Linux AsusK55VJ-ubuntu 4.2.0-35-generic #40-Ubuntu SMP Tue Mar 15 22:15:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux > lsb_release -crid Distributor ID: Ubuntu Description: Ubuntu 15.10 Release: 15.10 Codename: wily > grep libpython2.7 /etc/ld.so.cache Binary file /etc/ld.so.cache matches > grep x86_64-linux-gnu /etc/ld.so.conf nothing > ls -l /usr/lib/x86_64-linux-gnu/libpython2.7* lrwxrwxrwx 1 root root 51 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.a -> ../python2.7/config-x86_64-linux-gnu/libpython2.7.a lrwxrwxrwx 1 root root 19 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so -> libpython2.7_d.so.1 lrwxrwxrwx 1 root root 21 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so.1 -> libpython2.7_d.so.1.0 -rw-r--r-- 1 root root 6733568 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7_d.so.1.0 lrwxrwxrwx 1 root root 17 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so -> libpython2.7.so.1 lrwxrwxrwx 1 root root 19 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1 -> libpython2.7.so.1.0 -rw-r--r-- 1 root root 3574616 Okt 14 2015 /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 And just to ratify that the library we build indeed is linked against libpython ldd pyeval.oct | grep python - libboost_python-py27.so.1.58.0 => /usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0 (0x00007f907b7ce000) - libpython2.7.so.1.0 => /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 (0x00007f907b254000) + libboost_python-py27.so.1.58.0 => /usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0 (0x00007f907b7ce000) + libpython2.7.so.1.0 => /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0 (0x00007f907b254000) Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1572328 Title: libpython2.7 linked but not loaded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/1572328/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
