Re: [boost] [math] Comeau can't match math::tools::fmod_workaround

Subject: Re: [boost] [math] Comeau can't match math::tools::fmod_workaround
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2010-01-18 14:52:23

John Maddock wrote:
>>> 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] http://www.comeaucomputing.com/4.3.0/minor/linux/compat.html
>>
>> 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?

John,

I'm sorry for the long long silence about this issue.

I have to admit I've sort of given up with making Boost libraries
compilable with Comeau C/C++ back again.
This is due to time constraints as well as the fact that it seems I'm
"alone", meaning nobody seems to be using Boost with Comeau any more
so there seems to be no such need to keep supporting Comeau.

So, I've suspended my efforts for a while and going to take
them up as soon as time permits.

Thank you for your help and apologies for shutting the thread up.

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org