From the build logs: llvm[4]: Installing Release LLDB python modules mkdir: cannot create directory '/usr/lib64/python2.7/site-packages/lldb': Permission denied Error: Unable to find or create /usr/lib64/python2.7/site-packages/lldb The install continues but the file is missing and also required, because lldb has a python interpreter built in. Problem is that DESTDIR is ignored here. I guess I can post a fix later on.
Related and including a patch: https://smani.fedorapeople.org/patches/master/0001-Fix-python-wrapper-not-being-installed-909432.patch
Simpler patch that also fixes a broken link attached.
Created attachment 965652 [details] Patch
llvm-3.4.2-5.el7 has been submitted as an update for Fedora EPEL 7. https://admin.fedoraproject.org/updates/llvm-3.4.2-5.el7
Package llvm-3.4.2-5.el7: * should fix your issue, * was pushed to the Fedora EPEL 7 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=epel-testing llvm-3.4.2-5.el7' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-EPEL-2015-0062/llvm-3.4.2-5.el7 then log in and leave karma (feedback).
llvm-3.4.2-5.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.