implement sincosf and sincosl functions; add prototypes

presumably broken gcc may generate calls to these, and it's said that
ffmpeg makes use of sincosf.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/linux/sincosl.c b/src/linux/sincosl.c
new file mode 100644
index 00000000..2bfc4862
--- /dev/null
+++ b/src/linux/sincosl.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <math.h>
+
+void sincosl(long double t, long double *y, long double *x)
+{
+	*y = sinl(t);
+	*x = cosl(t);
+}