f89958d824
Largely to bring in preprocessor support for additional architectures as
based on 6215ba804eb500f3e28b39088c73af3c4f4cd10a by
Timothy Gu <timothygu99@gmail.com>:
Add preprocessor support for additional architectures
- _M_ARM is used by Microsoft [1]
- __riscv and __riscv_xlen are defined by [2]
- __sparc and __sparc__ are documented at [3]
- __MIPSEB__, __PPC__, __PPC64__ are documented at [3] and used in
Chromium's build/build_config.h [4]
Note: Chromium assumes that all PowerPC architectures are 64-bit. This
is in fact not true.
[1]: https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros?view=msvc-160
[2]: feca479356 (cc-preprocessor-definitions)
[3]: https://sourceforge.net/p/predef/wiki/Architectures/
[4]: https://source.chromium.org/chromium/chromium/src/+/master:build/build_config.h;drc=e12bf2e5ff1eacb9aca3e9a26bdeebdbdad5965a