Fixes for MinGW environment.

[Mihaylov93]

Involves issues #21 #20 #22

[Mihaylov93]

The clang test fails on sim_utils.c I didn´t apply clang-format to it because is a third party file and I kept the original formatting.

[pratikpc]

Use _WIN32 instead of MINGW to keep the code more portable and compatible with MSVC and Clang

I don't think either of them define MINGW

[Mihaylov93]

Use _WIN32 instead of MINGW to keep the code more portable and compatible with MSVC and Clang

I don't think either of them define MINGW

On the .pro I do use win32-g++, on the sim_utils.c I use MinGW because its a mingw specific issue (which could be on other compilers too) Check this PR or issue

As its mingw specific, MINGW32 it is. if we try others in the future, we just add them.

#ifdef __clang__
/*code specific to clang compiler*/
#elif __GNUC__
/*code for GNU C compiler */
#elif _MSC_VER
/*usually has the version number in _MSC_VER*/
/*code specific to MSVC compiler*/
#elif __BORLANDC__
/*code specific to borland compilers*/
#elif __MINGW32__
/*code specific to mingw compilers*/
#endif

[pratikpc]

@Mihaylov93 yes but the same strsep issue is present on both Clang and MSVC on Windows because of the absence of Linux based functions

MinGW also defines _WIN32

The issue isn't compiler specific so much so as, OS specific with strsep being a Linux based function which is absent on Windows on all 3 of the major compiler distributions (and the two major Standard Libs) that target Windows

So we could surely do a __MINGW32__ today but tomorrow, when we try to build it on MSVC and Clang, we will end up facing the same issue and so we would have to modify it then

So instead of modifying it in the future, let's modify it now

[Mihaylov93]

So we could surely do a MINGW32 today but tomorrow, when we try to build it on MSVC and Clang, we will end up facing the same issue and so we would have to modify it then

So instead of modifying it in the future, let's modify it now

As strsep is not part of the standard the provider of the string.h could chose to add it or not. The thing is that I am against adding code that I didn't test, I haven't tested clang or MSVC, checking the headers its missing too https://github.com/llvm-mirror/libcxx/blob/master/include/string.h but who knows, its always better to test with the given environments.