Jonathan Marler fd2c1d8605
Fix building aarch64-windows-gnu by adding missing libc files and compiler_rt functions (#9555)
* fix issue 9519

Added some missing files from mingw

* add missing compiler_rt functions

* finish PR

* add aarch64-windows-gnu to test targets

* add more compiler_rt

* add log2

* add pow

* add modti3
2021-09-07 19:44:21 +03:00
..
2019-09-25 23:35:41 -04:00

This compiler-rt library is ported from LLVM.

It's needed because LLVM emits library calls to compiler-rt when hardware lacks functionality, for example, 64-bit integer multiplication on 32-bit x86.

This library is automatically built as-needed for the compilation target and then statically linked and therefore is a transparent dependency for the programmer.

Any bugs should be solved by trying to duplicate the bug upstream.

  • If the bug exists upstream, get it fixed with the LLVM team and then port the fix downstream to Zig.
  • If the bug only exists in Zig, something went wrong porting the code, and you can run the C code and Zig code side by side in a debugger to figure out what's happening differently.