Improve compatibility with gcc-4.2.1

12 jobs for gcc421 in 9 minutes and 58 seconds (queued for 2 seconds)
Name Stage Failure
failed
build_linux_35 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/home/gitlab-runner/builds/0d638152/2/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py3.5.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/home/gitlab-runner/builds/0d638152/2/bob/bob.learn.em/build-prefix/bin/python', '/tmp/tmp3locp36r', '-v', 'develop', '-mxN', '-d', '/home/gitlab-runner/builds/0d638152/2/bob/bob.learn.em/develop-eggs/tmplzn5mhl8build'
(22:58:32)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1
failed
build_macosx_35 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/Users/buildbot/work/gitlab-ci/f6f95b82/0/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py3.5.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/Users/buildbot/work/gitlab-ci/f6f95b82/0/bob/bob.learn.em/build-prefix/bin/python', '/var/folders/8n/phc2t7ln52l2srkgv49ybfj00001fc/T/tmp_m32lbtr', '-v', 'develop', '-mxN', '-d', '/Users/buildbot/work/gitlab-ci/f6f95b82/0/bob/bob.learn.em/develop-eggs/tmpqbs9r2bybuild'
(23:05:51)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1
failed
build_linux_27 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/home/gitlab-runner/builds/0d638152/0/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py2.7.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/home/gitlab-runner/builds/0d638152/0/bob/bob.learn.em/build-prefix/bin/python', '/tmp/tmpJ_TwL3', '-v', 'develop', '-mxN', '-d', '/home/gitlab-runner/builds/0d638152/0/bob/bob.learn.em/develop-eggs/tmpFgeA9obuild'
(22:58:29)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1
failed
build_linux_34 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/home/gitlab-runner/builds/0d638152/1/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py3.4.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/home/gitlab-runner/builds/0d638152/1/bob/bob.learn.em/build-prefix/bin/python', '/tmp/tmpnrc6c0wd', '-v', 'develop', '-mxN', '-d', '/home/gitlab-runner/builds/0d638152/1/bob/bob.learn.em/develop-eggs/tmpckybfj5fbuild'
(22:58:28)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1
failed
build_macosx_27 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/Users/buildbot/work/gitlab-ci/f6f95b82/2/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py2.7.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/Users/buildbot/work/gitlab-ci/f6f95b82/2/bob/bob.learn.em/build-prefix/bin/python', '/var/folders/8n/phc2t7ln52l2srkgv49ybfj00001fc/T/tmpwmVO0l', '-v', 'develop', '-mxN', '-d', '/Users/buildbot/work/gitlab-ci/f6f95b82/2/bob/bob.learn.em/develop-eggs/tmpnvJS8hbuild'
(23:06:05)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1
failed
build_macosx_34 Build There is an unknown failure, please try again
    zc.buildout.easy_install.call_subprocess(args)
File "/Users/buildbot/work/gitlab-ci/f6f95b82/1/bob/bob.learn.em/eggs/zc.buildout-2.7.1-py3.4.egg/zc/buildout/easy_install.py", line 155, in call_subprocess
% repr(args)[1:-1])
Exception: Failed to run command:
'/Users/buildbot/work/gitlab-ci/f6f95b82/1/bob/bob.learn.em/build-prefix/bin/python', '/var/folders/8n/phc2t7ln52l2srkgv49ybfj00001fc/T/tmp8pgx8c2b', '-v', 'develop', '-mxN', '-d', '/Users/buildbot/work/gitlab-ci/f6f95b82/1/bob/bob.learn.em/develop-eggs/tmplpwv1x5ubuild'
(23:05:50)
Error: Command Failed "./bin/buildout"
Running after script...
$ ./_ci/after_build.sh
ERROR: Build failed: exit status 1