flvParser windows端构建工程 cmake -G "Visual Studio 16 2019" -A Win32 ./ -B .\cmake\build\ mac端构建工程 生成xcode工程 cmake -DCMAKE_CXX_STANDARD=11 -GXcode ./ -B ./cmake/build_mac 生成makefile cmake -DCMAKE_CXX_STANDARD=11 -DCMAKE_BUILD_TYPE=Release ./ -B ./cmake/build_mac