On Fri, Sep 11, 2020 at 2:07 PM Eduardo Habkost <ehabk...@redhat.com> wrote:
> On Fri, Sep 11, 2020 at 08:06:10PM +0100, Peter Maydell wrote: > > On Fri, 11 Sep 2020 at 19:49, Eduardo Habkost <ehabk...@redhat.com> > wrote: > > > > > > I'm wondering: do our supported build host platforms all include > > > compilers that are new enough to let us redefine typedefs? > > > > > > The ability to redefine typedefs is a C11 feature which would be > > > very useful for simplifying our QOM boilerplate code. The > > > feature is supported by GCC since 2011 (v4.6.0)[1], and by clang > > > since 2012 (v3.1)[2]. > > > > In configure we mandate either GCC v4.8 or better, or > > clang v3.4 or better, or XCode Clang v5.1 or better > > (Apple uses a different version numbering setup to upstream). > > So you should probably double-check that that xcode clang has > > what you want, but it looks like we're good to go otherwise. > > Can anybody confirm if the following is accurate? > > https://gist.github.com/yamaya/2924292#file-xcode-clang-vers-L67 > # Xcode 5.1 (5B130a) > Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn) > Target: x86_64-apple-darwin13.1.0 > Thread model: posix > > If we know we have GCC 4.8+ or clang 3.4+, can we move to C11 and > start using -std=gnu11? > All supported branches of FreeBSD tier 1 platforms would be fine since they all use clang. Most of the tier 2 ones do too, but the ports/pkg system we have will install a newer compiler if need be (the ones that don't are still stuck at gcc 4.2.1 for GPLv3 reasons). Warner
