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Dear XRootD users and developers, I wanted to install the XRootD python bindings for python 3.5 via pip on ScientificLinux 6, CentOS 7 and Ubuntu 18.04. For installation, I used the syntax "python3.5 -m pip install XRootD". Additionally, i tried to install the XRootD python bindings for python 2.7. Since I observed some unexpected behavior during the installation and needed to find out and fix missing dependencies manually, I would recommend to change parts of the installation procedure. 1. The pip output message Even if the installation fails, pip states the installation as successful ignoring any errors. 2. The compilation of XRootD during pip installation The installation procedure does not check if all prerequisites are available. It would be nice, if pip tells you to install the required packages and you don't have to look into the debug output. For CentOS7, the following packages need to be installed: - cmake - make - zlib-devel - gcc-c++ - openssl-devel - python-devel There may be additional requirements that were already installed on my system. 3. The python dependency in the installation script If I understood correctly, pip uses the install.sh script for installing the XRootD python bindings. In line 32, "python setup.py install" calls the default python version regardless of what python version was called for pip. If I sourced python3.5, the installation continues with the default python2.7 at this point. I have temporarily fixed this by linking the default python to the correct version to continue testing. Additionally, I found that "cmake" in line 8 uses the default python interpreter and library of the system instead of the version called by pip. -- Found PythonInterp: /usr/bin/python2 (found suitable version "2.7.5", minimum required is "2.4") -- Found PythonLibs: /usr/lib64/libpython2.7.so (found suitable version "2.7.5", minimum required is "2.4") This doesn't cause a failure of the installation, but I'm not sure if it will cause issues later. I finally managed to install the XRootD python bindings for both python versions on all mentioned operating systems, but it was a long journey. I would recommend to address these issues to make the XRootD python bindings easily installable by everyone. At least, a small documentation would be very helpful. Best regards and many thanks, Christoph ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1