Description of problem:

ROOT cannot be imported with EPEL7


Version-Release number of selected component (if applicable):

python2-root-6.22.00-2.el7.x86_64
root-6.22.00-2.el7.x86_64


How reproducible:

Every time

Steps to Reproduce:
1. python
2. python > import ROOT
3.

Actual results:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python2.7/site-packages/ROOT/__init__.py", line 34, in <module>
    import cppyy
  File "/usr/lib64/python2.7/site-packages/cppyy/__init__.py", line 64, in <module>
    libcppyy_mod_name, major, minor))
ImportError: Failed to import libcppyy2_7. Please check that ROOT has been built for Python 2.7


Expected results:

It should import.

Additional info:

This looks suspicious:


# ls -l  /usr/lib64/python*/site-packages/libcppyy*.so                                                                                          
lrwxrwxrwx. 1 root root 33 Jul 18 04:58 /usr/lib64/python2.7/site-packages/libcppyy2_7.so -> ../../root/libcppyy3_6.so.6.22.00
lrwxrwxrwx. 1 root root 41 Jul 18 04:58 /usr/lib64/python2.7/site-packages/libcppyy_backend2_7.so -> ../../root/libcppyy_backend3_6.so.6.22.00
lrwxrwxrwx. 1 root root 33 Jul 18 04:58 /usr/lib64/python3.6/site-packages/libcppyy3_6.cpython-36m-x86_64-linux-gnu.so -> ../../root/libcppyy3_6.so.6.22.00
lrwxrwxrwx. 1 root root 41 Jul 18 04:58 /usr/lib64/python3.6/site-packages/libcppyy_backend3_6.so -> ../../root/libcppyy_backend3_6.so.6.22.00

They all symlink to the 3.6 backend.

Indeed if I force the recreation of the symlinks:

cd /usr/lib64/python2.7/site-packages

ln -sf ../../root/libcppyy2_7.so.6.22.00 libcppyy2_7.so 
ln -sf ../../root/libcppyy_backend2_7.so.6.22.00 libcppyy_backend2_7.so 


Then the import of ROOT with default python (2.7) is fine.