bug#78682: Building libltdl with MSVC fails

[Ileana Dumitrescu]

On 05/06/2025 12:13, Kirill Makurin wrote:
> Hi Ileana,
>
> I tried building from development branch and it has the same issue.

Could you provide logs for this test? Also, looking over the previous
attached logs, NM may be the issue. In my test environment, I set
NM="dumpbin -all".

> Out of curiosity I also tried to use clang-cl.exe (this is a clang which 
> understands many of cl.exe's options), and I see the following:
>
> ```
> H:/git/libtool/libltdl/ltdl.c(781,19): error: call to undeclared 
> function 'access'; ISO C99 and later do not support implicit function 
> declarations [-Wimplicit-function-declaration]
> 781 |   int           notfound        = access (filename, R_OK);
>           |                                                  ^
> H:/git/libtool/libltdl/ltdl.c(781,19): note: did you mean 'accept'?
> C:\Program Files (x86)\Windows Kits\10\\include\10.0.22000.0\ 
> \um\winsock.h(739,19): note: 'accept' declared here
>    739 | SOCKET PASCAL FAR accept (
>             |                                               ^
> ```
>
> On native Windows (mingw/MSVC), `access` function is declared in io.h. 
> You may use the following condition to recognize native Windows:
>
> ```
> #if defined (_WIN32) && !defined (__CYGWIN__)
> #endif
> ```

Since this looks like a separate issue, could you submit a new bug for
it? I am also happy to review patches if you have a possible solution.

--
Ileana Dumitrescu

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