MinGW build fails due to "#warning"

[burnpanck]

temporary_allocator.cpp contains a check for __MINGW64__ to decide whether or not to use temporary_stack_initializer.
If it does decide to use it, it emits a #warning. However, the file is compiled with -Werror -Wall, making this warning effectively an error. Furthermore, -Wno-error=cpp will probably not work, because GCC emits another warning ("#warning is a GCC extension", which is enabled by -pedantic and cannot be silenced independently).

To make this work, one would probably have to either remove the #warning or disable -Werror for that source file.
However, glancing over the comments on the issues that seem to be requiring this temporary_stack_initializer in the first place, it appears that this bug may have been fixed a few years ago:

• Original issue: https://sourceforge.net/p/mingw-w64/bugs/527/
• Linked issue: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83562

Thus, potentially, the check could be removed completely.

[foonathan]

Thanks, I've removed the checks.