Hi Vladimir,

It appears to be a bug with the Intel compiler.

Along the lines you suggested, here is an example. Note that it needs the using namespace std and the 3.14f (explicitly f and not default or d) to appear.

The Intel team is aware of the problem.

Thanks
b.

/tmp> cat test.cc
#include <iostream>
#include <cmath>

using namespace std;
int main()
{
    std::cout << isfinite(3.14f) << std::endl;
    return 0;
}


/tmp> icpc test.cc
/usr/include/c++/4.3.3/cmath(522): error: identifier "__builtin_isfinite" is undefined
        return __builtin_isfinite(__type(__f));
               ^
          detected during instantiation of "__gnu_cxx::__enable_if<std::__is_arithmetic<_Tp>::__value, int>::__type std::isfinite(_Tp) [with _Tp=float]" at line 7 of "test.cc"

compilation aborted for test.cc (code 2)

/tmp> icpc --version
icpc (ICC) 11.1 20090630
Copyright (C) 1985-2009 Intel Corporation.  All rights reserved.

/tmp> g++ --version
g++ (Ubuntu 4.3.3-5ubuntu4) 4.3.3
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.



On Tue, Aug 25, 2009 at 10:01 PM, Vladimir Prus <vladimir@codesourcery.com> wrote:
Bill O'Hara wrote:

> Hi,
> I guess this may be a known problem but I wonder if there is any
> straightforward workaround.
>
> I need to install boost on our development machines which run Linux and have
> g++ 4.3.3 installed. We are wondering about also support the Intel c++
> compiler (version 11.1). When trying to build boost 1.39 we get many errors
> during compilation due to g++ builtins like __builtin_isfinite not being
> found. Example below.
>
> Perhaps I've missed something but using the intel toolset when building
> still seems to involve using these g++ specific features. Is there a
> workaround?

> For example:
>
>     "icpc" -c -xc++ -O3 -w1 -inline-level=2 -pthread -fPIC
> -DBOOST_ALL_NO_LIB=1 -DBOOST_MATH_TR1_DYN_LINK=1 -DNDEBUG -I"."   -c -o
> "bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/lround.o"
> "libs/math/build/../src/tr1/lround.cpp"
>
> ...failed intel-linux.compile.c++
> bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/lround.o...
> intel-linux.compile.c++
> bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/nextafter.o
> /usr/include/c++/4.3.3/cmath(522): error: identifier "__builtin_isfinite" is
> undefined
>         return __builtin_isfinite(__type(__f));
>                ^

It appears to be some misconfiguration of the intel compiler. If you create
a source file containing just:

       #include <cmath>

and try to compile it with icpc, does it work? If not, you probably have to
ask Intel support what's going on.

- Volodya


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