https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87030
--- Comment #10 from Jeremy Huddleston Sequoia <jeremyhu at macports dot org> --- FWIW, I don't have much power other than nagging to move along the OSS drops. Those are managed by a process, and prioritization is given to those making explicit requests to the OSS mailing list. *PLEASE* email opensou...@apple.com directly (and feel free to CC me). I agree with pretty much all Iain has said here. There's nothing that should be different about how gcc treats i386 on darwin vs how it treats i386 on linux. Note that for us, the far bigger concerns are the broken --with-build-sysroot support: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79885 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80203 Given those, gcc only builds if we have the DevSDK ("headers at /" package) installed. That package is being provided as a workaround for any projects that fail to build without it (and note that GCC is the only project we are aware of that falls into this category). In some future macOS version, it will cease to be provided. I strongly encourage you to address those issues as soon as possible to ensure that GCC continues to build with future versions.