On Dec 8 02:07, Aaron Franke via Cygwin wrote: > Hello Cygwin, > I am wondering what are the plans for adding support for native ARM64 > Windows to Cygwin. > Currently there are only downloads for x86 (both 32-bit and 64-bit), > but not for ARM. > I do see in the FAQ that there is a mention of how ARM systems can run > the x86 version of Cygwin, however I am interested in a native ARM64 > toolchain if possible. By the way, I'm only interested in 64-bit ARM.
No plans. To create an ARM64 version of Cygwin we need: - Toolchains (binutils, gcc, gdb) targeting aarch64-pc-cygwin and aarch64-w64-mingw32. I don't know if the mingw toolchain already exists, but if so, the Cygwin toolchain could be derived from there. The differences would be basically the same as on x86_64 (sizeof(long), different default link libs, etc) - Make sure Mingw-w64 for ARM is working as desired, including the special code for Cygwin in there. AFAIK, Mingw-w64 for ARM64 is still in an experimental stage, but I could be wrong. - Make sure to understand the differences between ARM64 ABI on Windows vs. the default aarch64 ABI (if any). - At least one person who's fluent in aarch64 assembler who will take a stab at creating matching aarch64 assembler code snippets in places we have x86 and x86_64 assembler today. We might get away with some of the code being in newlib already (memset/memcpy). - ARM64 Windows and hardware for testing. I don't see anything of that happen any time soon ¯\_(ツ)_/¯ Corinna -- 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
