Linker error for core.sys.windows.winuser imports when compiling as 64 bit.

Jul 01, 2018

Hey guys, I'm getting a linker error when compiling with DMD `-m63` that I don't get as 23 bit. I'm importing `ShowWindow` from `core.sys.windows.winuser`, and I get the following: C:\D\dmd2\windows\bin\lld-link.exe: warning: main.obj: undefined symbol: ShowWindow error: link failed Error: linker exited with status 1 My compiler command is `dmd main.d -m64 -i -O -release -inline -boundscheck=off `. I don't think the source code would make a difference other than to say that I'm calling `ShowWindow`. Any help would be much appreciated. Thanks! Also, how does formatting work? Markdown doesn't seem to work, or HTML.

June 30, 2018

Re: Linker error for core.sys.windows.winuser imports when compiling as 64 bit.

Posted by Jonathan M Davis
in reply to spikespaz

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Jonathan M Davis

Posted in reply to spikespaz

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On Sunday, July 01, 2018 00:42:30 spikespaz via Digitalmars-d-learn wrote:
> Hey guys, I'm getting a linker error when compiling with DMD `-m63` that I don't get as 23 bit.
>
> I'm importing `ShowWindow` from `core.sys.windows.winuser`, and I get the following:
>
> C:\D\dmd2\windows\bin\lld-link.exe: warning: main.obj: undefined
> symbol: ShowWindow
> error: link failed
> Error: linker exited with status 1
>
> My compiler command is `dmd main.d -m64 -i -O -release -inline
> -boundscheck=off
> `.
>
> I don't think the source code would make a difference other than to say that I'm calling `ShowWindow`.
>
> Any help would be much appreciated. Thanks!

Well, per the MSDN page, that symbol is in User32.lib, so make sure that you're linking against it - though why it would link against it with 32-bit and not 64-bit, I don't know.

> Also, how does formatting work? Markdown doesn't seem to work, or HTML.

For the web forum you mean? It's just a web client for the newsgroups that we use, and many folks interact with it as a newsgroup or via the mailing list interface rather than through forum.dlang.org. So, it's expected that everything will be in plain text.

- Jonathan M Davis

On Sunday, 1 July 2018 at 01:16:59 UTC, Jonathan M Davis wrote: > On Sunday, July 01, 2018 00:42:30 spikespaz via Digitalmars-d-learn wrote: >> Hey guys, I'm getting a linker error when compiling with DMD `-m63` that I don't get as 23 bit. >> >> I'm importing `ShowWindow` from `core.sys.windows.winuser`, and I get the following: >> >> C:\D\dmd2\windows\bin\lld-link.exe: warning: main.obj: undefined >> symbol: ShowWindow >> error: link failed >> Error: linker exited with status 1 >> >> My compiler command is `dmd main.d -m64 -i -O -release -inline >> -boundscheck=off >> `. >> >> I don't think the source code would make a difference other than to say that I'm calling `ShowWindow`. >> >> Any help would be much appreciated. Thanks! > > Well, per the MSDN page, that symbol is in User32.lib, so make sure that you're linking against it - though why it would link against it with 32-bit and not 64-bit, I don't know. > > - Jonathan M Davis Check to make sure it's actually defined in user32.lib. I'm having a similar issue and would love to know why these functions are apparently not being defined https://forum.dlang.org/thread/ncarbitntjeobljragfd@forum.dlang.org

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