Thank you for the initial review for v1! Work on refactoring, rebasing, and validating "[PATCH v2] Add aarch64-w64-mingw32 target" is in progress. The v2 x64 mingw target will also be fully tested to avoid regression due to refactoring. Please provide feedback if anything is missing.
Changes from v1 to v2: Adjust the target name to aarch64-*-mingw* to exclude the big-endian target from support. Exclude 64-bit ISA. Rename enum calling_abi to aarch64_calling_abi. Move AARCH64 MS ABI definitions FIXED_REGISTERS, CALL_REALLY_USED_REGISTERS, and STATIC_CHAIN_REGNUM from aarch64.h to aarch64-abi-ms.h. Rename TARGET_ARM64_MS_ABI to TARGET_AARCH64_MS_ABI. Exclude TARGET_64BIT from the aarch64 target. Exclude HAVE_GAS_WEAK. Set HAVE_GAS_ALIGNED_COMM to 1 by default. Use a reference from "x86 Windows Options" to "Cygwin and MinGW Options". Update commit descriptions to follow standard style. Regards, Evgeny
