Function declaration conflicts with introduced by using declaration

[llvmbot]

Bugzilla Link	18385
Resolution	INVALID
Resolved on	May 04, 2017 07:48
Version	unspecified
OS	Windows NT
Blocks	#18592
Reporter	LLVM Bugzilla Contributor
CC	@mclow

Extended Description

Win 8.1 Pro 64 bit, MSVC 2013 (November 2013 CTP Compiler Tools, it's latest)
Project files generated via Cmake for MS Visual Studio 2012 Win64.
SVN rev 198298:

===cmath header===

error C2883: 'std::abs' : function declaration conflicts with 'abs' introduced by using-declaration D:\Build\libcxx\include\cmath

error C2084: function 'long double abs(long double) throw()' already has a body

error C2883: 'std::abs' : function declaration conflicts with 'abs' introduced by using-declaration D:\Build\libcxx\include\cmath

error C2084: function 'double abs(double) throw()' already has a body

error C2883: 'std::abs' : function declaration conflicts with 'abs' introduced by using-declaration D:\Build\libcxx\include\cmath

error C2084: function 'float abs(float) throw()' already has a body

===math_win32.h===

error C2084: function 'bool signbit(double)' already has a body

same with 'std::fpclassify', also 'strtof' in stdlib - "redefinition; different linkage".

[mclow]

Is this still a problem?

[llvmbot]

We don't support MSVC, only Clang-cl or clang++ on Windows. It doesn't reproduce with either of those. It also doesn't reproduce when using MSVC 2015 or 2017 as the libc implementation.

Resolving as INVALID because it uses an unsupported frontend, but it could alternatively be FIXED since we at least have some Windows support.