Re: Building wxLua (wx.dll) with Lua 5.1 and 5.3, both for x32 and 64b machine

[Paul K <paul@...>]

Hi Luk,

> The symbol
>        "wchar_t const * const wxEmptyString" (?wxEmptyString@@3PB_WB)
> is missing.

wxEmptyString is a global instance of an empty string; see
https://docs.wxwidgets.org/3.1/interface_2wx_2string_8h.html#a9a321d587166a30017b608dd2d234033

I'm not sure why it would be missing, as it appears to be a part of
`baselib_stringimpl.o` file, which then gets included in something
like libwx_baseu-3.1.a (the exact name depends on your wxwidgets
configuration).

Paul.

On Mon, Nov 2, 2020 at 7:09 AM Luk Pro <Lua.Mailing.List@gmx.com> wrote:
>
> Hello Paul,
>
> I'm still struggling with building wx Lua module -
>
> On Sun, 18 Oct 2020 18:47:32 +0200, Paul K <paul@zerobrane.com> wrote:
>
> > Yes, with a couple of caveats: (1) you need to compile wxWidgets from
> > source, as you won't be able to use their binaries,
>
> OK, I did (I believe) - now I have a lot of .lib and .dll in the
>
>         wxWidgets\lib\vc_lib\...
> and
>         wxWidgets\lib\vc_dll\...
>
> directories.
>
> > and (2) you need
> > to get the wxlua source from https://github.com/pkulchenko/wxlua/tags
> > (or get the latest source from the master branch)
>
> Yes, I got it.
>
> The main problem now is that the (MSVC) linker is missing some symbols (there are also some more errors, but for now -)
>
> wxldserv.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxEmptyString" (?wxEmptyString@@3PB_WB)
> wxldtarg.obj : error LNK2001: unresolved external symbol "wchar_t const * const wxEmptyString" (?wxEmptyString@@3PB_WB)
> ...
>
> The symbol
>
>         "wchar_t const * const wxEmptyString" (?wxEmptyString@@3PB_WB)
>
> is missing.
>
> Where - in which .lib or .dll of wxWidgets - is the symbol supposed to be defined/exported to?
>
> (Note also that I used CMake to get the initial .sln for building the wx Lua module; I ran it after I had wxWidgets libs compiled.)
>
> Best regards,
>
> Lukas