Description of problem: Fedora's packaging of sagemath includes an interface with qepcad, and Fedora also packages qepcad itself. Unfortunately, the integration does not work: sagemath is unable to start qepcad even for the most basic smoke tests. Version-Release number of selected component (if applicable): sagemath-core-6.4.1-4.fc22.x86_64 qepcad-B-1.69-8.fc22.x86_64 How reproducible: Completely deterministic: 100% reproducible. Steps to Reproduce: 1. Install both sagemath and qepcad-B. 2. Run command: sage -c 'print qepcad_version()' Actual results: Traceback (most recent call last): File "/usr/lib64/sagemath/local/bin/sage-eval", line 13, in <module> eval(compile(s,'<cmdline>','exec')) File "<cmdline>", line 1, in <module> File "/usr/lib64/python2.7/site-packages/sage/interfaces/qepcad.py", line 1539, in qepcad_version banner = str(qepcad_banner()) File "/usr/lib64/python2.7/site-packages/sage/interfaces/qepcad.py", line 1520, in qepcad_banner qex._start() File "/usr/lib64/python2.7/site-packages/sage/interfaces/expect.py", line 444, in _start raise RuntimeError("unable to start %s" % self.name()) RuntimeError: unable to start QEPCAD Expected results: Version B 1.69, 16 Mar 2012 Additional info: If you set the $SAGE_PEXPECT_LOG to 1 before running the sage command, you will get a log file of the form "~/.sage/pexpect_logs/QEPCAD-*-*-*.log" that reveals some information about the conversation between the sage process and the qepcad subprocess. In particular, the log file reports: Error HELPFRD: Could not open /usr/lib64/sagemath/local/bin/qepcad.help Indeed, no such file exists on my system. I do see a "/usr/share/qepcad/bin/qepcad.help" file which is installed as part of qepcad-B, though. So it seeems there is a bad path somewhere between sage and qepcad. If I manually (as root) make a symlink from "/usr/lib64/sagemath/local/bin/qepcad.help" to "/usr/share/qepcad/bin/qepcad.help", the problem goes away. I'm not convinced that this is the *proper* fix, but the fact that it works at all seems informative.
Thanks. I remember I had it corrected when packaging sagemath for Mandriva. For some reason the patch got lost at some point, when I started packaging for Fedora. I found an instance of the patch, that needs to be adapted and applied for Fedora (as well as the proper requires for qepcad) at https://abf.rosalinux.ru/import/sagemath/blob/rosa2014.1/sage-qepcad.patch
Fixed for rawhide in http://pkgs.fedoraproject.org/cgit/sagemath.git/commit/?id=396208cf9aacda720996e12c50f878b439115020 I will make a f22 update once the other issues are work out.
Thanks for giving this your attention so quickly, Paulo. I'm glad you recognized the bug and remembered your earlier fix!
sagemath-6.5-7.fc22 has been submitted as an update for Fedora 22. https://admin.fedoraproject.org/updates/sagemath-6.5-7.fc22
Package sagemath-6.5-7.fc22: * should fix your issue, * was pushed to the Fedora 22 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing sagemath-6.5-7.fc22' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-12901/sagemath-6.5-7.fc22 then log in and leave karma (feedback).
sagemath-6.5-7.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.