On Thursday, 17 September 2020 at 09:53:57 UTC, Remi wrote:
[snip]
My problem here is mostly understanding the __initZ symbol and
where it comes from. I mostly want classes and the bare minimum
of std like you did for Tetris in WebAssembly for example. My
project is OpenGL/SDL2 so there's a lot of glue code but just
ruinning a simple example gives me problems I want to
understand first.
Well... I just found out that it wasn't an issue with the code
but rather the order of files as given to the compiler:
(ldc-1.23.0)speps:~/dlang/wasm/webassembly$ ldc2 -i=. -i=std
-Iarsd-webassembly/ -L-allow-undefined -oftetris.wasm
-mtriple=wasm32-unknown-unknown-wasm arsd-webassembly/object.d
tetris.d
arsd-webassembly/object.d(112): Error: Global variable type does
not match previous declaration with same mangled name:
_D11TypeInfo_Ai6__initZ
arsd-webassembly/object.d(112): Previous IR type:
%object.TypeInfo_Array = type { [1 x i8*]*, i8*,
%object.TypeInfo* }, mutable, non-thread-local
arsd-webassembly/object.d(112): New IR type:
%object.TypeInfo_Ai = type { [1 x i8*]*, i8*, %object.TypeInfo*
}, const, non-thread-local
(ldc-1.23.0)speps:~/dlang/wasm/webassembly$ ldc2 -i=. -i=std
-Iarsd-webassembly/ -L-allow-undefined -oftetris.wasm
-mtriple=wasm32-unknown-unknown-wasm tetris.d
arsd-webassembly/object.d
(ldc-1.23.0)speps:~/dlang/wasm/webassembly$
If object.d is passed after tetris.d, everything works as
expected. Otherwise you get issues with __initZ. It also means
that I might have no control over what dub does with the order of
files and I can't use dub to build my WASM project.
