Re: "cannot run C compiled programs" error

[Anna Ceguerra <anna dot ceguerra at sydney dot edu dot au>]

Hi,


On 21/04/11 21/04/11 9:17 AM, "Jonathan Wakely" <jwakely.gcc@gmail.com>
wrote:

> On 21 April 2011 00:00, Anna Ceguerra <anna.ceguerra@sydney.edu.au> wrote:
>> Hi all,
>> 
>> Thanks for all of your replies.
>> 
>> 1) --enable-languages
>> I put in everything except ada (because I didn't have a dependency) and go
>> (because it was causing errors).
>> 
>> The build didn't go smoothly either - I had to remove config.cache (all of
>> them) in the middle when there was an error regarding config.cache.
> 
> If you're going to reconfigure with different options it is sometimes
> necessary to remove the entire build directory and start again running
> configure in an empty directory.  Doing that will never cause a
> problem, and avoids some potential problems.

Thanks for your reply, it successfully built in one go, and I successfully
installed it. However when I try to compile using the new compiler, I get
the following error:

/usr/local/lib/gcc/i386-apple-darwin10.7.0/4.6.1/../../../../include/c++/4.6
.1/tr1/special_function_util.h: In function âÃÃbool
std::tr1::__detail::__isnan(_Tp)âÃÃ:
/usr/local/lib/gcc/i386-apple-darwin10.7.0/4.6.1/../../../../include/c++/4.6
.1/tr1/special_function_util.h:113:19: error: expected unqualified-id before
âÃÃ(âÃà token

This is the relevant section in the file:

#if _GLIBCXX_USE_C99_MATH && !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC

    /// This is a wrapper for the isnan function. Otherwise, for NaN,
    /// all comparisons result in false. If/when we build a std::isnan
    /// out of intrinsics, this will disappear completely in favor of
    /// std::isnan.
    template<typename _Tp>
    inline bool __isnan(const _Tp __x)
    {
      return std::isnan(__x);       // it is failing here
    }

#else

    template<typename _Tp>
    inline bool __isnan(const _Tp __x)
    {
      return __builtin_isnan(__x);
    }

    template<>
    inline bool __isnan<float>(const float __x)
    {
      return __builtin_isnanf(__x);
    }

    template<>
    inline bool __isnan<long double>(const long double __x)
    {
      return __builtin_isnanl(__x);
    }

#endif

Am I configuring the program incorrectly?

Thanks,
Anna.