bug#78682: Building libltdl with MSVC fails

[Ileana Dumitrescu]

On 03/06/2025 17:29, Kirill Makurin wrote:
> Hi,

Hi!

> Building libltdl with MSVC fails:
>
> ```
> libltdl_la-ltdl.obj : error LNK2019: unresolved external symbol 
> lt_ltdl_LTX_preloaded_symbols referenced in function lt_dlinit
> libltdl\.libs\libltdl-7.dll : fatal error LNK1120: 1 unresolved externals
> ```
>
> I attached full invocation in separate file since it's quite messy.
>
> I did some investigation.
>
> Apparently, `lt_ltdl_LTX_preloaded_symbols` is supposed to be defined in 
> libtool-generated `libltdl/.libs/libltdlS.c`, however it defines 
> `lt_libltdl_LTX_preloaded_symbols` instead, as if it was mingw build.
>
> I was building from libtool-2.5.4 release tarball. I tried building from 
> `master` and the issue also exist there.

Most if not all MSVC-related fixes are in the 'development' branch for
review and testing before I migrate them to master. Would you try
building libltdl with MSVC using development source code?

> Thank you for working on MSVC-related issues. I have some other things 
> to report/suggest.

Thank you for your detailed bug reports!

--
Ileana Dumitrescu

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