在$ PATH中找不到运行GO GET SDL2错误的可执行文件

Question

Im simplly trying to install go-sdl2 on MACOX from https://github.com/veandco/go-sdl2#installation

go get -v github.com/veandco/go-sdl2/{sdl,img,mix,ttf}

I get following ERROR:

github.com/veandco/go-sdl2/sdl
# pkg-config --cflags sdl2
pkg-config: exec: "pkg-config": executable file not found in $PATH