gistfile1.txt

// From nuklear_sdl_renderer.h
NK_API void
nk_sdl_font_stash_begin(struct nk_font_atlas **atlas)
{
    nk_font_atlas_init_default(&sdl.atlas);
    nk_font_atlas_begin(&sdl.atlas);
    *atlas = &sdl.atlas;
}

--  From the main Nuklear bindings, nk_font_atlas is a record type.
type font_atlas_access is access all nk_font_atlas; 

-- The binding to the above.
procedure sdl_font_stash_begin (atlas : access font_atlas_access)  -- ./Nuklear/demo/sdl_renderer/nuklear_sdl_renderer.h:16
with Import => True, 
    Convention => C, 
    External_Name => "nk_sdl_font_stash_begin";

--  From the demo.adb
Atlas   : aliased Nk.font_atlas_access := null;
...
NkR.sdl_font_stash_begin (Atlas'Access);