build: Check for sincosf()

sincosf() is really a GCC-specific function that may more may not be
supported on non-GCC compilers, so we want to check for it, otherwise we
use a fallback implementation, not unlike the one in
demos/gtk-demo/gtkgears.c.

1 files changed, 9 insertions, 1 deletions

diff --git a/gsk/gsktransform.c b/gsk/gsktransform.c
index 3f944db9ea..388dad5b45 100644
--- a/gsk/gsktransform.c
+++ b/gsk/gsktransform.c
@@ -712,7 +712,15 @@ _sincos (float  deg,
     }
   else
     {
-      sincosf (deg * M_PI / 180.0, out_s, out_c);
+      float angle = deg * M_PI / 180.0;
+
+#ifdef HAVE_SINCOSF
+      sincosf (angle, out_s, out_c);
+#else
+      *out_s = sinf (angle);
+      *out_c = cosf (angle);
+#endif
+
     }
 }