follow https://wiki.libsdl.org/Installation#Linux.2FUnix 但是 用 https://github.com/SDL-mirror/SDL

裝在自己 local 的目錄：~/imageprogram/SDL:

cd SDL
mkdir build && cd build
../configure --prefix=/home/charles-chang/imageprogram/SDL
make 
make install

姊果救會裝在 --prefix 指定的 path

基本的 make options

gcc -o myprogram myprogram.c `sdl2-config --cflags --libs`