Implement C23 cospi

C23 adds various <math.h> function families originally defined in TS
18661-4.  Add the cospi functions (cos(pi*x)).

Tested for x86_64 and x86, and with build-many-glibcs.py.

1 files changed, 6 insertions, 0 deletions

diff --git a/math/Versions b/math/Versions
index 49d61f212f..72dff5ff5b 100644
--- a/math/Versions
+++ b/math/Versions
@@ -653,4 +653,10 @@ libm {
     log10p1f64x; log10p1f128;
     logp1f64x; logp1f128;
   }
+  GLIBC_2.41 {
+    # Functions not involving _Float64x or _Float128, for all configurations.
+    cospi; cospif; cospil; cospif32; cospif64; cospif32x;
+    # Functions involving _Float64x or _Float128, for some configurations.
+    cospif64x; cospif128;
+  }
 }