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-rw-r--r--prism/defines.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/prism/defines.h b/prism/defines.h
index 785361728e..80db39bc77 100644
--- a/prism/defines.h
+++ b/prism/defines.h
@@ -137,6 +137,14 @@
#endif
/**
+ * isinf on POSIX systems it accepts a float, a double, or a long double.
+ * But Windows didn't provide isinf, so we need to use _finite instead.
+ */
+#ifdef _WIN32
+# include <float.h>
+#endif
+
+/**
* If you build prism with a custom allocator, configure it with
* "-D PRISM_XALLOCATOR" to use your own allocator that defines xmalloc,
* xrealloc, xcalloc, and xfree.