tree 2f3179627e6a5f39eaf3fb7455fd1cfc40e11e58
parent 0f23ada000e64234af2d184e972da8cba44cce4b
author L. E. Segovia <amy@amyspark.me> 1681850534 -0300
committer James Zern <jzern@google.com> 1682104783 +0000

cmake: Fix build with Clang/CL

It is possible to use the Clang/CL compiler when targeting MSVC;
unfortunately, not only this flavour requires using the same flags
as GCC to handle intrinsics codegen, the default is solely SSE2
(like with stock Clang, and unlike MSVC's own default of SSE4.1 [1]).
The MSVC STL also requires C++14. For this reason, when the GNU
flavour is detected, we apply the correct flag style and use C++14
as the C++ standard.

An additional fix is also needed so that the glibc math library
isn't linked against when using this kind of Clang compiler.

This fixes compiling aom with Clang/CL 15.0.1 (MSVC 17.6 Preview 3).

[1]: https://learn.microsoft.com/en-us/cpp/build/reference/arch-x64
for the x86_64 case.

Change-Id: I54140a1645f539944657c2b18dd801b57e422216