kamil@kamil-K50IN:~/201794/image$ gcc `pkg-config --cflags --libs sdl SDL_image` showimage.c -o out
/tmp/cckEik3v.o: In function `Load_image':
showimage.c:(.text+0x1b): undefined reference to `IMG_Load'
showimage.c:(.text+0x29): undefined reference to `SDL_GetError'
/tmp/cckEik3v.o: In function `Paint':
showimage.c:(.text+0x84): undefined reference to `SDL_UpperBlit'
showimage.c:(.text+0xaf): undefined reference to `SDL_UpdateRect'
/tmp/cckEik3v.o: In function `main':
showimage.c:(.text+0x132): undefined reference to `SDL_Init'
showimage.c:(.text+0x13b): undefined reference to `SDL_GetError'
showimage.c:(.text+0x201): undefined reference to `SDL_WM_SetCaption'
showimage.c:(.text+0x22b): undefined reference to `SDL_VideoModeOK'
showimage.c:(.text+0x2b0): undefined reference to `SDL_SetVideoMode'
showimage.c:(.text+0x2c0): undefined reference to `SDL_GetError'
showimage.c:(.text+0x339): undefined reference to `SDL_SetColors'
showimage.c:(.text+0x38f): undefined reference to `SDL_PollEvent'
showimage.c:(.text+0x465): undefined reference to `SDL_LockSurface'
showimage.c:(.text+0x4c9): undefined reference to `SDL_UnlockSurface'
showimage.c:(.text+0x5b2): undefined reference to `SDL_RWFromFile'
showimage.c:(.text+0x5ca): undefined reference to `SDL_SaveBMP_RW'
showimage.c:(.text+0x5f4): undefined reference to `SDL_Delay'
showimage.c:(.text+0x60b): undefined reference to `SDL_FreeSurface'
showimage.c:(.text+0x610): undefined reference to `SDL_Quit'
collect2: ld returned 1 exit status