patch by John Faith https://bugs.launchpad.net/inkscape/+bug/175697

should be applied upstream in 2geom.

diff --git a/src/2geom/isnan.h b/src/2geom/isnan.h
index a2906be15126e56c6e55260231e6838f2e9bba17..52085a25f6fe103ed7ebad2eaf2368601274de94 100644 (file)
--- a/src/2geom/isnan.h
+++ b/src/2geom/isnan.h
@@ -27,6 +27,8 @@
  */
 
 #if defined(__isnan)
+# define is_nan(_a) (__isnan(_a))
+#elif defined(__APPLE__) && __GNUC__ == 3
 # define is_nan(_a) (__isnan(_a))      /* MacOSX/Darwin definition < 10.4 */
 #elif defined(WIN32) || defined(_isnan)
 # define is_nan(_a) (_isnan(_a))       /* Win32 definition */