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$NetBSD: patch-include-geos-platform.h.in,v 1.3 2012/03/09 14:46:12 fhajny Exp $
--- include/geos/platform.h.in.orig 2011-05-18 19:59:50.000000000 +0000
+++ include/geos/platform.h.in
@@ -91,10 +91,13 @@ extern "C"
# elif defined(__MINGW32__)
// sandro furieri: sanitizing MinGW32
# define ISNAN(x) (std::isnan(x))
-# elif defined(__OSX__) || defined(__APPLE__)
+# elif defined(__OSX__) || defined(__APPLE__) || defined(__NetBSD__) || defined(__DragonFly__)
// Hack for OS/X <cmath> incorrectly re-defining isnan() into oblivion.
// It does leave a version in std.
# define ISNAN(x) (std::isnan(x))
+# elif defined(__sun)
+# include <cmath>
+# define ISNAN(x) (std::isnan(x))
# endif
#endif
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