Building ROOT against exiting cling and (patched) clangdev

[Wile_E_Coyote]

Build ROOT6 without builtin_llvm?

Hi, The time required to build ROOT v6 (actually v6-02-00-patches branch) with cmake seems to be mostly due to building the LLVM modules, so I thought why not just install LLVM (on Ubuntu 14.10, which gives v3.5.0) and then do $ cmake -Dbuiltin_llvm=OFF ? Unfortunately, even after having hacked the LLVM cmake modules which are not up to scratch (see bugs.launchpad.net/ubuntu/+sour … ug/1387011), this does not seem to be possible as, even though the builtin_llvm support has been disabled: …

Missing Canvas

Honestly speaking, sooner or later, you will learn by hard that the policy of using a “system-provided” ROOT version (e.g. in “/usr/[bin|lib]” or “/usr/local/[bin|lib]”) is a dead end. You will learn that you need something like three different versions of ROOT - just because something that works with a particular ROOT version is not working with another ones, or because some piece of your additional, experiment / analysis specific, software explicitly requires a particular ROOT version. The s…

Sourcing root for all users

So, the common approach for sourcing ROOT seems to be just including source /path/to/root/bin/thisroot.sh in your ~/.bashrc I was thinking that in order for it to work for all users, you could do the same in /etc/bash.bashrc (but that doesn’t seem to work). And that for it to work also when accessing the computer via SSH, you could do the same in /etc/environment. Neither of these options, however, seem to work for me, and I’m at my wits’ end. How have/would you solve this? I want to set t…