Re: Request to update libc++ related packages for current Clang/LLVM toolchain
Takashi Yano via Cygwin <[email protected]>
| Newsgroups | gmane.os.cygwin |
|---|---|
| Message-ID | <[email protected]> |
On Sun, 18 Jan 2026 01:22:32 -0700 Brian Inglis wrote: > On 2026-01-18 00:45, Takashi Yano via Cygwin wrote: > > On Sun, 18 Jan 2026 00:35:37 +0000, kikairoya via Cygwin wrote: > >> 2026115 21:53:21 (+09:00) Takashi Yano via Cygwin : > >>> The resulted a.exe will be free from libgcc_s. Please try. > > >> Using compiler-rt instead of libgcc_s requires extra attention in Cygwin, > >> because the emulated TLS functionality implemented in compiler-rt can't > >> share the storage across DLL boundaries. > > > Thanks for pointing this out. > > The comment in the emutls.c explains that. > > https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/builtins/emutls.c#L378-L389 > > Do you think this is a defect we should accept? > > Is there a reason why llvm/clang/compiler-rt can not use Cygwin TLS and must use > Emulated TLS? I think so. gcc also uses its own emutls. > Should this discussion be moved to -developers as that level of knowledge seems > to be required? Maybe. -- Takashi Yano <[email protected]> -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple