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--- geos-3.4.2/configure.in.orig 2016-06-08 17:46:43.002250304 +0000
+++ geos-3.4.2/configure.in 2016-06-08 17:57:36.342241606 +0000
@@ -197,7 +197,7 @@
AC_LANG_PUSH([C++])
AC_CACHE_CHECK([for isnan], ac_cv_isnan,
[AC_TRY_LINK([#include <cmath>],
- [double x; int y; y = isnan(x);],
+ [double x; int y; y = std::isnan(x);],
ac_cv_isnan=yes,
ac_cv_isnan=no
)])
--- geos-3.4.2/include/geos/platform.h.in.orig 2016-06-08 14:06:53.910234182 -0400
+++ geos-3.4.2/include/geos/platform.h.in 2016-06-08 14:07:19.298233844 -0400
@@ -84,7 +84,7 @@
#endif
#if defined(HAVE_ISNAN)
-# define ISNAN(x) (isnan(x))
+# define ISNAN(x) (std::isnan(x))
#else
# if defined(_MSC_VER)
# define ISNAN(x) _isnan(x)
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