isfinite not in scope using cmath on os x

[jklowden]

The following patch allows compilation on a modern mac.

 Index: src/algorithm/RobustDeterminant.cpp
 ===================================================================
 --- src/algorithm/RobustDeterminant.cpp (revision 3364)
 +++ src/algorithm/RobustDeterminant.cpp (working copy)
 @@ -23,6 +23,7 @@
  #include <geos/util/IllegalArgumentException.h>

  #include <cmath>
 +using std::isfinite;

  #include <geos/platform.h> // for ISNAN, FINITE

I know this line was removed a mere 28 hours ago. I'm not sure how platform.h might be changed instead; it's very messy.

[mloskot]

Try this

#if defined(HAVE_STD_ISFINITE)
   using std::isfinite;
#endif

or

#if defined(HAVE_STD_ISFINITE)
   using std::isfinite;
#endif

It is very messy indeed.

I would like to see solve it using/as in Boost.Math  fpclassify.hpp

[strk]

Note that this was broken by r3362

[strk]

Should be fixed in r3365 -- test welcome

[strk]

r3370 tries in another way, hopefully saner (see #444)