1 files changed, 18 insertions, 0 deletions
diff --git a/unix/f2c/libf2c/i_sign.c b/unix/f2c/libf2c/i_sign.c
new file mode 100644
index 00000000..4c20e949
--- /dev/null
+++ b/unix/f2c/libf2c/i_sign.c
@@ -0,0 +1,18 @@
+#include "f2c.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef KR_headers
+integer i_sign(a,b) integer *a, *b;
+#else
+integer i_sign(integer *a, integer *b)
+#endif
+{
+integer x;
+x = (*a >= 0 ? *a : - *a);
+return( *b >= 0 ? x : -x);
+}
+#ifdef __cplusplus
+}
+#endif