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--- a/include/math.h
+++ b/include/math.h
@@ -195,7 +195,7 @@ extern int signgam;
/* ISO C99 defines some generic macros which work on any data type. */
-#ifdef __USE_ISOC99
+#if defined(__USE_ISOC99) || defined(__USE_BSD)
/* Get the architecture specific values describing the floating-point
evaluation. The following symbols will get defined:
@@ -315,6 +315,11 @@ enum
#endif /* Use ISO C99. */
+/* BSD compat */
+#define finite(x) __finite(x)
+#define finitef(x) __finitef(x)
+#define finitel(x) __finitel(x)
+
#ifdef __USE_MISC
/* Support for various different standard error handling behaviors. */
typedef enum
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