[Windows] Unresolved symbol in shared static this.

[skyline131313]

// Source/Game/Core/Math/package.d
module Game.Core.Math;

// Source/Game/Core/Random.d

module Game.Core.Random;

import std.random : Xorshift, unpredictableSeed;

import Game.Core.Math;


private __gshared Xorshift engine;

shared static this()
{
    engine = Xorshift(unpredictableSeed);
}

Output from the build:

ldmd2 -m64 -g -shared -I../Build/Imports/ -JText/ -JData/ -mscrtlib=msvcrt -of../Build/Bin/Windows/runtime_out.dll Source\Game\Core\Random.d Source\Game\Core\Math\package.d -L/LIBPATH:../Build/Lib/Windows/x64 -L/PDB:../Build/Obj/runtime-20220214-113857.pdb OpenAL32.lib vulkan-1.lib SDL2.lib imgui.lib libvorbis.lib libvorbisfile.lib

runtime_out.obj : error LNK2019: unresolved external symbol _D3std6random__T14XorshiftEngineTkVki128Vii11ViN8ViN19ZQBn6__initZ referenced in function _D4Game4Core6Random24_sharedStaticCtor_L11_C1FZv
..\Build\Bin\Windows\runtime_out.dll : fatal error LNK1120: 1 unresolved externals

Turning it to a function makes it compile and resolve successfully, also needs to include the math package as the bare minimum.

[kinke]

Thx; finally found some time to reproduce. Reduced (ldc2 -shared bla.d):

import std.random : Xorshift, unpredictableSeed;

private __gshared Xorshift engine;

shared static this()
{
    engine = Xorshift(unpredictableSeed);
}

It works with -linkonce-templates, and with -dllimport=defaultLibsOnly (and so with -fvisibility=hidden too). And when converting the module ctor to a regular function, as you mentioned.