`example.c:(.text+0x13d): undefined reference to `SDL_Init'`

[paulmenzel]

On Debian sid/unstable with libsdl2-dev 2.24.0+dfsg-1, I get:

$ git log --oneline --no-decorate -1
1dcbae1 Merge pull request #17 from MichielP1807/master
$ pkg-config --cflags --libs sdl2
-D_REENTRANT -I/usr/include/SDL2 -lSDL2
$ cc `pkg-config --cflags --libs sdl2` -o gifplay gifdec.c example.c
/usr/bin/ld: /tmp/ccxL4R2w.o: in function `main':
example.c:(.text+0x13d): undefined reference to `SDL_Init'
/usr/bin/ld: example.c:(.text+0x146): undefined reference to `SDL_GetError'
/usr/bin/ld: example.c:(.text+0x15d): undefined reference to `SDL_Log'
/usr/bin/ld: example.c:(.text+0x197): undefined reference to `SDL_CreateWindowAndRenderer'
/usr/bin/ld: example.c:(.text+0x1a0): undefined reference to `SDL_GetError'
/usr/bin/ld: example.c:(.text+0x1b7): undefined reference to `SDL_Log'
/usr/bin/ld: example.c:(.text+0x21f): undefined reference to `SDL_SetWindowTitle'
/usr/bin/ld: example.c:(.text+0x283): undefined reference to `SDL_SetRenderDrawColor'
/usr/bin/ld: example.c:(.text+0x28f): undefined reference to `SDL_RenderClear'
/usr/bin/ld: example.c:(.text+0x29b): undefined reference to `SDL_RenderPresent'
/usr/bin/ld: example.c:(.text+0x2d2): undefined reference to `SDL_CreateRGBSurface'
/usr/bin/ld: example.c:(.text+0x2e6): undefined reference to `SDL_GetError'
/usr/bin/ld: example.c:(.text+0x2fd): undefined reference to `SDL_Log'
/usr/bin/ld: example.c:(.text+0x373): undefined reference to `SDL_PollEvent'
/usr/bin/ld: example.c:(.text+0x397): undefined reference to `SDL_Delay'
/usr/bin/ld: example.c:(.text+0x3a1): undefined reference to `SDL_GetTicks'
/usr/bin/ld: example.c:(.text+0x3c9): undefined reference to `SDL_LockSurface'
/usr/bin/ld: example.c:(.text+0x449): undefined reference to `SDL_MapRGB'
/usr/bin/ld: example.c:(.text+0x487): undefined reference to `SDL_MapRGB'
/usr/bin/ld: example.c:(.text+0x4ae): undefined reference to `SDL_MapRGB'
/usr/bin/ld: example.c:(.text+0x52a): undefined reference to `SDL_UnlockSurface'
/usr/bin/ld: example.c:(.text+0x53d): undefined reference to `SDL_CreateTextureFromSurface'
/usr/bin/ld: example.c:(.text+0x55b): undefined reference to `SDL_RenderCopy'
/usr/bin/ld: example.c:(.text+0x567): undefined reference to `SDL_RenderPresent'
/usr/bin/ld: example.c:(.text+0x573): undefined reference to `SDL_DestroyTexture'
/usr/bin/ld: example.c:(.text+0x578): undefined reference to `SDL_GetTicks'
/usr/bin/ld: example.c:(.text+0x5bd): undefined reference to `SDL_Delay'
/usr/bin/ld: example.c:(.text+0x5e8): undefined reference to `SDL_FreeSurface'
/usr/bin/ld: example.c:(.text+0x5f4): undefined reference to `SDL_DestroyRenderer'
/usr/bin/ld: example.c:(.text+0x600): undefined reference to `SDL_DestroyWindow'
/usr/bin/ld: example.c:(.text+0x605): undefined reference to `SDL_Quit'
collect2: error: ld returned 1 exit status