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--- fft.c.orig 2016-04-24 21:38:13 UTC
+++ fft.c
@@ -27,6 +27,10 @@
#include <math.h>
#include <complex.h>
+#if __FreeBSD_version < 902000
+# define cexpf(x) (expf(crealf(x))*(cosf(cimagf(x))+sinf(cimagf(x))*I))
+#endif
+
#define N (DDB_FREQ_BANDS * 2)
static float hamming[N]; /* hamming window, scaled to sum to 1 */
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