Add config.w32 for building on Windows

[Jan-E]

This is a minimal config.w32 for building php_maxminddb.dll on Windows.
Tests with a GeoIP2-City.mmdb in \usr\local\share\GeoIP

=====================================================================
Number of tests :    3                 3
Tests skipped   :    0 (  0.0%) --------
Tests warned    :    0 (  0.0%) (  0.0%)
Tests failed    :    0 (  0.0%) (  0.0%)
Expected fail   :    0 (  0.0%) (  0.0%)
Tests passed    :    3 (100.0%) (100.0%)
---------------------------------------------------------------------
Time taken      :    0 seconds
=====================================================================

It works for PHP 7.0 - 7.4 and PHP 8.0, provided the libmaxminddb dependencies are in deps/lib and deps/include. Please review and merge.

See a phpinfo dump:
https://phpdev.toolsforresearch.com/php-8.0.1RC1-nts-Win32-vs16-x64.htm

And the complete distro
https://phpdev.toolsforresearch.com/php-8.0.1RC1-nts-Win32-vs16-x64.zip

[oschwald]

Thanks! I had a couple of small comments. Also please add the file to package.xml so that it ends up in the PECL package.

[Jan-E]

There is another thing needed to make it compile under PHP 7.4 and PHP 8.0. php/php-src@86aac3e: uint does not exist anymore in the Windows environment. Usually it is replaced by uint32_t. e.g. php/php-src@afb6ca2

Shall I make that change in the same PR?

[Jan-E]

@cmb69 The dependencies are in https://github.com/maxmind/libmaxminddb
Building of libmaxminddb.lib and maxminddb.pdb is something like

md vc15.x64 
cd vc15.x64
cmake -G "Visual Studio 15 2017 Win64" ..
devenv maxminddb.sln /Clean "RelWithDebInfo|x64"
devenv maxminddb.sln /Build "RelWithDebInfo|x64"
copy maxminddb.dir\RelWithDebInfo\*.pdb RelWithDebInfo /y
copy RelWithDebInfo\* \php-sdk\win64build.vc15\lib\ /y
copy ..\include\*.h \php-sdk\win64build.vc15\include /y

The last two lines are specific for my build environment, but you'll get the grip.
I have done something like this for VC14 (PHP 7.0/7.1), VC15 (PHP 7.2, 7.3. 7.4) and VS16 (PHP 8.0), all x64/Win64 and x86/Win32. Can we go for a release of the Windows DLL's on https://pecl.php.net/package/maxminddb ?

[Jan-E]

There is another thing needed to make it compile under PHP 7.4 and PHP 8.0. php/php-src@86aac3e: uint does not exist anymore in the Windows environment. Usually it is replaced by uint32_t. e.g. php/php-src@afb6ca2

Changed in https://github.com/Jan-E/MaxMind-DB-Reader-php/commit/eb2e004db5d84cd300e2583b722f5d1f5b94c905

[cmb69]

@Jan-E, I'm somewhat reluctant to deploy an unreleased master build of libmaxminddb. @oschwald, are you planning to release a new libmaxminddb release with CMake support?

[Jan-E]

The best way forward would be to make a new release of libmaxminddb with the commit that prevents getopt: maxmind/libmaxminddb@73f1236

And then make a new release of the PHP maxminddb extension with support for Windows.

[oschwald]

Yes, I think it would make sense to do a release of libmaxminddb with the CMake support.

[oschwald]

Releases of both this and libmaxminddb have been done.