Provide logbl(3) when long double is double

bcallah@ had same diff
ok guenther@

diff --git a/lib/libm/src/s_logb.c b/lib/libm/src/s_logb.c
index 09fe82c..277b41c 100644 (file)
--- a/lib/libm/src/s_logb.c
+++ b/lib/libm/src/s_logb.c
@@ -33,3 +33,4 @@ logb(double x)
                return (double) (ix-1023); 
 }
 DEF_STD(logb);
+LDBL_MAYBE_UNUSED_CLONE(logb);