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Subject: Re: [boost] [math] Comeau can't match math::tools::fmod_workaround
From: John Maddock (john_at_[hidden])
Date: 2009-11-29 06:26:41

>> It's easy enough to disable long double support in Boost.Math, it's just
>> a case of working out what macros the std lib sets when it's not
>> available so we can hook into that. Is __NO_LONG_DOUBLE_MATH defined
>> after including math.h by any chance?
> No, this macro is not defined.
> I contacted with Comeau team and, as they are always helpful, I've
> received a quick fix for this issue. It is possible to compile using
> Comeau with gcc/g++ compatibility mode [1] enabled.
> [1]
> In this mode g++ built-in functions are available, so it is possible to
> define missing fabs for Linux-specific configuration in which toolset
> includes Comeau frontend + GNU C++ compiler + GLIBC:
> #if defined(__linux__) && defined(__COMO__) \
> && defined(__GNUG__) && defined(__GLIBC__)
> namespace std {
> inline long double fabs(long double value)
> { return __builtin_fabsl(value); }
> }
> #endif
> I've confirmed using the simple test program that this option works.

Right, that could be a workaround for that one function, but isn't the whole
lot of the long double functions missing?


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