(dropping ports@) > On Nov 5, 2018, at 9:22 AM, Marc Espie <es...@nerim.net> wrote: > >> On Mon, Nov 05, 2018 at 09:15:28AM -0500, Daniel Dickman wrote: >> gcc uses them for precompiled headers (PCH) which is a local diff added >> by kurt@ in 2009. its likely nothing in base uses PCH but i don't know >> what in ports needs this: > > This has always been a mess. I suspect it's not really important these days > because pch only make sense for large C++ codebases, which are definitely > not going to be happy with the gcc from base anyway. > > There is also some snippet using sbrk to avoid malloc in gmon.c. > > That might be more of an issue...
i did not run into anything else when i compiled base gcc on an i386 system with a modified libc. looked to me like just the pch functionality, although we’d need to test every platform to be certain, i guess. > >> [3]https://github.com/openbsd/src/commit/cfee5d1 >> >> choices there would be to disable PCH support or maybe there's a >> different way to reimplement without brk/sbrk. > >> clang looks like they have a HAVE_SBRK ifdef or something like that. so >> usage can likely be turned off but i don't know this codebase that well >> so that's just an assumption. > > Yep, I'll have to look. let me know if you want me to test any llvm diffs on my system.
