[Mesa-dev] Building Mesa for Windows using Visual Studio

[Emil Velikov]

Hi Shervin,

On 14 April 2015 at 00:22, Shervin Sharifi <shervin0 at gmail.com> wrote:
> Hi,
>   I tried to use Mesa (compiled with MSVC) to run OpenGL ES content on
> Windows . I ran into a few problems.
>   I don't know if this is the right way of reporting issues, but thought
> people may be interested to know.
>
Another thing would be to file a bug report, although most people
appreciate patches (send via git send-email) even more :-)

>  Here's a piece of code in functions _mesa_dlopen(const char*, int) in
> src\mesa\main\dlopen.h  (same problem happens with function _mesa_dlsym(void
> *, const char *) in the same file).
>
>  The original code returns NULL and doesn't load the library if the code is
> compiled with Visual Studio.
>
True but is the library, that is to be opened, there in the first
place ? Last time I've looked nothing seriously bad was happening
(apart from the missing EXT_texture_compression_s3tc and
ANGLE_texture_compression_dxt extensions) when we fail to open the
dxtn library.

Cheers,
Emil

>  #if defined(HAVE_DLOPEN)
>    flags = RTLD_LAZY | RTLD_GLOBAL; /* Overriding flags at this time */
>    return dlopen(libname, flags);
> #elif defined(__MINGW32__)
>    return LoadLibraryA(libname);
> #else
>    return NULL;
> #endif
>
>  Adding the following lines to the code resolves the problem:
>
> #elif defined(_WIN32)
>    return LoadLibraryA(libname);
>
>  Thanks,
>      Shervin
>