added support for building this on windows

Author: nlitsme

Makefile

@@ -1,7 +1,16 @@
+CMAKEARGS+=$(if $(D),-DCMAKE_BUILD_TYPE=Debug,-DCMAKE_BUILD_TYPE=Release)
+CMAKEARGS+=$(if $(COV),-DOPT_COV=1)
+CMAKEARGS+=$(if $(PROF),-DOPT_PROF=1)
+CMAKEARGS+=$(if $(LIBCXX),-DOPT_LIBCXX=1)
+
 cmake:
-	cmake -B build . $(if $(D),-DCMAKE_BUILD_TYPE=Debug,-DCMAKE_BUILD_TYPE=Release) $(CMAKEARGS)
+	cmake -B build . $(CMAKEARGS)
 	$(MAKE) -C build $(if $(V),VERBOSE=1)
 
+vc:
+	"C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/bin/cmake.exe" -G"Visual Studio 16 2019" -B build . $(CMAKEARGS)
+	"C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/MSBuild/Current/Bin/amd64/MSBuild.exe" build/*.sln -t:Rebuild
+
 
 clean:
 	$(RM) -r build CMakeFiles CMakeCache.txt CMakeOutput.log