[PATCH 0/5] MR7205: winecrt0: Add builtin functions for msvc/arm mode

[Martin Storsjö (＠mstorsjo)]

Since 9b8409fce4da18e3d9a914a9e5831d10eb9052de, a PE compiler is required for 32 bit arm.

That can either be supplied by using plain Clang (from a distro), or llvm-mingw. However when using plain Clang (in MSVC mode), we're lacking compiler builtin functions that either would be provided by MSVC libraries or by compiler-rt libraries bundled in llvm-mingw.

Vendor a copy of the relevant files from compiler-rt and include them when building for arm in MSVC mode.

This allows building a functional wine for 32 bit arm without requiring third party tools such as llvm-mingw.