Export math_opt from google3 #197

	name: amd64 Windows CMake .Net

	on: [push, pull_request]

	jobs:
	# Building using the github runner environement directly.
	cmake:
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@v3
	- name: Install SWIG 4.1.1
	run: \|
	(New-Object System.Net.WebClient).DownloadFile("http://prdownloads.sourceforge.net/swig/swigwin-4.1.1.zip","swigwin-4.1.1.zip");
	Expand-Archive .\swigwin-4.1.1.zip .;
	echo "$((Get-Item .).FullName)/swigwin-4.1.1" \| Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
	- name: Check swig
	run: swig -version
	# Install .NET SDKs
	- name: Setup .NET Core 3.1
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: 3.1.x
	- name: Setup .NET 6.0
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: 6.0.x
	- name: Check dotnet
	run: dotnet --info
	- name: Check cmake
	run: cmake --version
	- name: Configure
	run: cmake -S. -Bbuild -G "Visual Studio 17 2022" -A x64 -DCMAKE_BUILD_TYPE=Release -DBUILD_DOTNET=ON -DBUILD_CXX_SAMPLES=OFF -DBUILD_CXX_EXAMPLES=OFF
	- name: Build
	run: cmake --build build --config Release --target ALL_BUILD -v -- /maxcpucount
	- name: Test
	run: cmake --build build --config Release --target RUN_TESTS -v -- /maxcpucount
	- name: Install
	run: cmake --build build --config Release --target INSTALL -v -- /maxcpucount

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