mingw-w64: errno.h misses lots of defines

[rubenvb]

Bugzilla Link	9091
Resolution	FIXED
Resolved on	Sep 23, 2011 02:48
Version	unspecified
OS	Windows NT
Blocks	#9456

Extended Description

When including libc++'s , lots of macros aren't defined. LLVM/Clang had the same issue, but that went away with this revision of a file, in which the missing symbols were defined:
http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/KillTheDoctor/system_error.h?r1=116597&r2=116596&pathrev=116597

The file has been removed since, and I guess the way of error reporting was changed. Are these really necessary in libc++ anyway?

[llvmbot]

The draft c++0x standard defines the required macros for in 19.4 [errno] Table 31. The libc++ implementation uses a subset of these which can be found by searching for "__throw_system_error".

[rubenvb]

Patch to remedy the issue on Windows

[rubenvb]

Resolved in r140328.