SDL_Timer and serial

Hi all,

I don’t know if anybody else had the same issue before.

I have a software where I write to serial (ttyUSB0) and I wanted to use SDL timer to time my writing.
My code works until I add
SDL_Init(SDL_INIT_EVERYTHING); or SDL_Init(SDL_INIT_TIMER);

Can somebody can advice me something?

Looking forward to your answers