Linux dmd has a core.runtime.Runtime.loadLibrary linkage problem

[Jordi Sayol]

I think this might help:

$ dmd -defaultlib=libphobos2.so main.d

El 10/10/26 a les 16:52, Rambutan via Digitalmars-d-learn ha escrit:
> I've been using a D to dynamically load a dynamic library itself also written in D as a part of a much bigger project on Linux.
> 
> I've been using gdc where the difficulties I am about to describe do not exist.
> gdc D version 2.108
> gdc (GCC) 14.2.1 20250405
> 
> I used the functions in core.sys.posix.dlfcn with the exception that I am using core.runtime.Runtime.loadLibrary instead of core.sys.posix.dlfcn.dlopen and I am using core.runtime.Runtime.unloadLibrary instead of core.sys.posix.dlfcn.dlclose because the D runtime in the dynamic library needs to be integrated with that of the loading program on load and separated and shut down on unload.
> 
> https://dlang.org/phobos/core_runtime.html#.Runtime.loadLibrary
> 
> When I try to compile the same source using dmd, I get a linkage problem. What do I need to do to bring these functions in?
> ```
> /usr/bin/ld: dyload.o: in function `core.runtime.Runtime.loadLibrary!().loadLibrary(scope const(char[]))':
> main.d:(.text._D4core7runtime7Runtime__T11loadLibraryZQoFMxAaZPv[_D4core7runtime7Runtime__T11loadLibraryZQoFMxAaZPv]+0x96): undefined reference to `rt_loadLibrary'
> /usr/bin/ld: dyload.o: in function `core.runtime.Runtime.unloadLibrary!().unloadLibrary(void*)':
> main.d:(.text._D4core7runtime7Runtime__T13unloadLibraryZQqFPvZb[_D4core7runtime7Runtime__T13unloadLibraryZQqFPvZb]+0x5): undefined reference to `rt_unloadLibrary'
> collect2: error: ld returned 1 exit status
> Error: linker exited with status 1
> ```
> 
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