Rework config.w32

[weltling]

The rework adapts the lib names expectation to the usual naming scheme in PHP. The dependency libs header need a light patching, the current packages are accessible here https://windows.php.net/downloads/pecl/deps/. The latest PECL release build was redone using this config.w32 patch and the linked deps.

Thanks.

[rtheunissen]

Thank you for your help @weltling. 🙏 Do you know why the appveyor build is failing?

Checking for mpdecimal.h ...  deps\include
Checking for library libmpdec.lib ... deps\lib\libmpdec.lib
...
php_decimal.obj : error LNK2019: unresolved external symbol __imp_mpd_init referenced in function zm_startup_decimal

[weltling]

@rtheunissen yes, the current Appveyor script uses a static dependency build, https://github.com/php-decimal/extension/blob/master/appveyor.yml#L67. The import library is named libmpdec-2.4.2.dll.lib in the libmpdec's Makefile. The usual scheme used in PHP and implemented in this patch, is that a static library is called somelib_a.lib, and an import library somelib.lib. Also, for extensions built shared also shared dependency builds are preferred (as it's done in this patch and would be delivered in pecl build). That can be changed of course, depends on what makes sense for you.

I've pushed a relevant fix to appveyor script, which will suffice for now. There might be other improvements to AppVeyor, if needed.

Thanks.

[weltling]

Ah, also why it needs some extra code in this case - libmpdec requires an extra build flag, when header is used for builds linking with DLL. Normally one would check that either static or dynamic dep is available.

Thanks.

[rtheunissen]

That can be changed of course, depends on what makes sense for you.

I have a lot to learn here, thank you for helping. 👍