usr: libc: Add math.h + musl math impl portexpt

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/libc/src/musl-math/llrint.c b/lib/libc/src/musl-math/llrint.c
new file mode 100644
index 0000000..4f583ae
--- /dev/null
+++ b/lib/libc/src/musl-math/llrint.c
@@ -0,0 +1,8 @@
+#include <math.h>
+
+/* uses LLONG_MAX > 2^53, see comments in lrint.c */
+
+long long llrint(double x)
+{
+	return rint(x);
+}