Libc functions undefined when linking

[Adam D Ruppe]

On Tuesday, 4 January 2022 at 21:22:26 UTC, Ben Jones wrote:
>>   * frame #0: 0x0000000000000000

That's null, meaning the library wasn't loaded.

simpledisplay actually doesn't need -lX11 since it always dynamic 
loads the libraries. Normally it throws when this fails though 
instead of keeping null but that check is also initialized in a 
static constructor....

With your different build process though, do you still have a D 
main? If druntime is not fully initialized these libs won't load 
nor will it set the success flag. So that'd leave null.

You can also quite possibly try to load it yourself:

         xlib.loadDynamicLibrary();
         xext.loadDynamicLibrary();

in your main and see if it works. Then the variable to check is 
`if(!librariesSuccessfullyLoaded)` and see if it set it up.