Try to fix doctest on macos

src/sage/structure/meson.build

@@ -60,12 +60,23 @@ extension_data = {
 }
 
 foreach name, pyx : extension_data
+    if name == 'element'
+      # Compile this with -Os because it works around a bug with
+      # GCC-4.7.3 + Cython 0.19 on Itanium, see Issue #14452. Moreover, it
+      # actually results in faster code than -O3.
+      # It's also needed to generate proper OverflowError (see Issue 2956)
+      extra_cflags = ['-Os']
+    else
+      extra_cflags = []
+    endif
+
     py.extension_module(name,
         sources: pyx,
         subdir: 'sage/structure',
         install: true,
         include_directories: [inc_cpython, inc_ext, inc_rings],
         dependencies: [py_dep, cysignals, gmp, gmpy2, mpc, mpfr],
+        c_args: extra_cflags,
     )
 endforeach