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-rw-r--r--include/complex.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/include/complex.h b/include/complex.h
index acf8cf14ba..e173f1f6a3 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -1 +1,11 @@
-#include <math/complex.h>
+#ifndef _COMPLEX_H
+# include <math/complex.h>
+
+/* Return the complex inverse hyperbolic sine of finite nonzero Z,
+   with the imaginary part of the result subtracted from pi/2 if ADJ
+   is nonzero.  */
+extern complex float __kernel_casinhf (complex float z, int adj);
+extern complex double __kernel_casinh (complex double z, int adj);
+extern complex long double __kernel_casinhl (complex long double z, int adj);
+
+#endif