Importing cargl.c from NetBSD.

newlib/libm/complex/Makefile.am

@@ -11,7 +11,7 @@ src = cabs.c cacos.c cacosh.c carg.c casin.c casinh.c \
       csin.c csinh.c csqrt.c ctan.c ctanh.c
 
 lsrc = cabsl.c creall.c cimagl.c ccoshl.c cacoshl.c \
-       clogl.c csqrtl.c
+       clogl.c csqrtl.c cargl.c
 
 fsrc =	cabsf.c casinf.c ccosf.c cimagf.c cprojf.c  \
         csqrtf.c cacosf.c casinhf.c ccoshf.c clogf.c clog10f.c \

newlib/libm/complex/cargl.c

@@ -0,0 +1,18 @@
+/* $NetBSD: cargl.c,v 1.1 2014/10/10 00:48:18 christos Exp $ */
+
+/*
+ * Public domain.
+ */
+
+#include <complex.h>
+#include <math.h>
+
+long double
+cargl(long double complex z)
+{     
+       #ifdef _LDBL_EQ_DBL
+         return carg (z);
+       #else
+         return atan2l (imag (z), real (z));
+       #endif
+}