1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libF77/r_atan.c b/lib/libF77/r_atan.c
new file mode 100644
index 000000000000..1e3817bdf661
--- /dev/null
+++ b/lib/libF77/r_atan.c
@@ -0,0 +1,13 @@
+#include "f2c.h"
+
+#ifdef KR_headers
+double atan();
+double r_atan(x) real *x;
+#else
+#undef abs
+#include "math.h"
+double r_atan(real *x)
+#endif
+{
+return( atan(*x) );
+}