1 files changed, 10 insertions, 0 deletions
diff --git a/src/math/y0.c b/src/math/y0.c
new file mode 100644
index 00000000..d1286d5d
--- /dev/null
+++ b/src/math/y0.c
@@ -0,0 +1,10 @@
+#include <math.h>
+
+double y0(double x)
+{
+        return x;
+}
+
+/*
+XOPEN(4)
+*/