On Fri, Jun 5, 2020 at 9:57 AM Kevin Kofler <kevin.kof...@chello.at> wrote:
> Ben Cotton wrote: > > == Summary == > > Fedora has historically forced packages to build with GCC unless the > > upstream project for the package only supported Clang/LLVM. This > > change proposal replaces that policy with one where compiler selection > > for Fedora follows the package's upstream preferences. > > > > == Owner == > > * Name: Jeff Law > > * Email: l...@redhat.com > > I am opposed to this change. Chromium and Firefox build fine with GCC. I > think that a distribution should be built with a consistent toolchain > wherever possible. > > Last I checked, there were several reasons why GCC is preferred over > Clang/LLVM in Fedora. And if that should ever change (or have changed > already), then switching the systemwide default (reversing the rules, > i.e., > using GCC only for those packages that do not build with Clang) should be > envisioned. But as far as I know, that is not the case at this time, > considering runtime performance, security features, etc. > > I do not see why we should allow yet another special case for Firefox, nor > why we should let random packages make their own choice of compiler and > risk > running into hidden binary incompatibilities. We have a system compiler > for > a reason. > I don't think we should force Fedora Contributors (Packagers) to change/fix their packages to compile with GCC if upstream decides, supports and tests GCC. There are tons of gcc specific patches in chromium [0], there were some issues in Firefox [1]. Apart from browsers, LibreOffice is going to use LLVM/Clang from Release 7.0 too, so that would potentially be another added work to LibreOffice packagers in the future. I believe we should make packaging as easy as possible and allowing packagers to work with compilers that have upstream support is a great way to make their lives easier. I don't know how much of an issue is currently missing -fstack-clash-protection support LLVM, but if Mozilla distributes official Firefox binaries without that flag, Google distributes Chrome without it, I feel it's not a big deal. [0] https://src.fedoraproject.org/rpms/chromium/blob/master/f/chromium.spec#_205 # To line 250 [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1601707
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