isnan w/ compiler 4.9.2

Tom Cauchois

Hi,

I'm trying to use the "isnan"/etc. functions from math.h, and while the functions themselves exist, they refer to a series of functions: _Dclass, _FDclass, _LDclass that are defined earlier in the file, but which the compiler claims are undefined: "identifier "_Dclass" is undefined test.cpp line 10". I #include <math.h> at the top of the file, before any other includes, and have nothing externally meaningful defined with compiler -D flags.

I found another forum post claiming these functions had been added as of compiler 4.9.x, but I can't get them to work.

Thanks,

Tom

over 13 years ago

0 Cody Addison over 13 years ago

TI__Expert 4540 points

Tom,

This is a bug in the math.h header file. The functions _Dclass, _FDclass, and _LDclass are included in the std namespace, but we do not provide the proper using statements. I have created SDSCM00042764 to track the issue. You can work around the problem by including the following statements:

using ::std::_Dclass; using ::std::_FDclass; using ::std::_LDclass

0 Tom Cauchois over 13 years ago in reply to Cody Addison

Intellectual 270 points

Codya,

Thanks for the workaround! I'll keep my eye on the bug to see when it gets fixed in a tools release.

Arm-based microcontrollers

Arm-based microcontrollers forum

isnan w/ compiler 4.9.2