aemerson added a comment. In D58320#1402254 <https://reviews.llvm.org/D58320#1402254>, @peter.smith wrote:
> The implementation changes in the Darwin toolchain look fine to me, although > with respect to the command line option I think Petr Hosek's message on > cfe-dev is interesting: > > > GCC implements -nolibc which could be used to achieve the same effect when > > combined with -nostartfiles (and -nostdlib++ when compiling C++). I'd > > prefer that approach not only because it improves compatibility with with > > GCC, but also because it matches existing flag scheme which is subtractive > > rather than additive (i.e. -nodefaultlibs, -nostdlib, -nostdlib++, > > -nostartfiles). Clang already defines this flag but the only toolchain that > > currently supports it is DragonFly. > > Looking at https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html (quoted here > for convenience) > > > -nostartfiles > > Do not use the standard system startup files when linking. The standard > > system libraries are used normally, unless -nostdlib, -nolibc, or > > -nodefaultlibs is used. > > -nolibc > > Do not use the C library or system libraries tightly coupled with it when > > linking. Still link with the startup files, libgcc or toolchain provided > > language support libraries such as libgnat, libgfortran or libstdc++ unless > > options preventing their inclusion are used as well. This typically removes > > -lc from the link command line, as well as system libraries that normally > > go with it and become meaningless when absence of a C library is assumed, > > for example -lpthread or -lm in some configurations. This is intended for > > bare-board targets when there is indeed no C library available. > > It does seem like these options accomplish what -flink_builtins_rt do with > the added advantage of being more portable with gcc. If they don't work for > you it will be worth double checking with Petr. Thanks for taking a look. I've replied on the thread for the problem that approach presents. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D58320/new/ https://reviews.llvm.org/D58320 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
