Re-fix the build with ICC and cmath & math.h

Commit c35fef9d3b8bb77a7f303e3cd62c86cd00e57f5b wasn't sufficient. The
problem is that there's a complex combination of libc headers (math.h),
C++ headers (cmath), which may be provided by three different sources on
Linux (glibc, gcc and ICC). On some combinations, the isnan macro leaks
from math.h or cmath and that's what the the commit above tried to fix.

On some other combinations, there's no macro but there's an ::isnan
function defined. When we do "using namespace std; return isnan(x);",
that causes a compilation error. This commit solves that by detecting
whether there is a macro defined.

error: more than one instance of overloaded function "isnan" matches the argument list
             function "isnan(double)"
             function "std::isnan(double)"
             argument types are: (double)

Change-Id: Iaeecaffe26af4535b416fffd148bf71826541bdd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions