c++ - SDL_Init crashes without apparent reason -

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i'm trying write simple sdl2 , opengl program sdl_init causes application crash right @ beggining. here's code:

#include <iostream> #include <cstdint> #include <windows.h> #include <gl/gl.h> #include <sdl2/sdl.h>  #define win_width 800 #define win_height 600   int callback winmain(   hinstance hinstance,   hinstance hprevinstance,   lpstr lpcmdline,    int ncmdshow) {    int err;   sdl_window *window;   sdl_glcontext context;   uint32_t win_flags = sdl_window_opengl;    std::cout << "before";    if (sdl_init(sdl_init_video) < 0) {     std::cout << "fail";     std::cout << "sdl init error: " << sdl_geterror() << std::endl;   }    std::cout << "success";    window = sdl_createwindow("rgb", sdl_windowpos_undefined, sdl_windowpos_undefined,      win_width, win_height, win_flags);    context = sdl_gl_createcontext(window);    sdl_gl_deletecontext(context);   sdl_destroywindow(window);   sdl_quit();    return 0; }

and output is:

before

then crashes.

debugger output (when enters winmain):

winmain (hinstance=0x0, hprevinstance=0x1d04aa0, lpcmdline=0x0, ncmdshow=0)     @ src/main.cpp:15 15    int ncmdshow) { (gdb) s 20    uint32_t win_flags = sdl_window_opengl; (gdb) s 22    std::cout << "before" << std::endl; (gdb) s before 24    if (sdl_init(sdl_init_video) < 0) { (gdb) s  program received signal sigsegv, segmentation fault. 0x0000000000000000 in ?? ()


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