BUG: the native and cross files must be UTF-8 encoded

Author: dnicolodi

mesonpy/__init__.py

@@ -703,15 +703,15 @@ def __init__(
                         cpu_family = {family!r}
                         endian = 'little'
                     ''')
-                    self._meson_cross_file.write_text(cross_file_data)
+                    self._meson_cross_file.write_text(cross_file_data, encoding='utf-8')
                     self._meson_args['setup'].extend(('--cross-file', os.fspath(self._meson_cross_file)))
 
         # write the native file
         native_file_data = textwrap.dedent(f'''
             [binaries]
             python = '{sys.executable}'
         ''')
-        self._meson_native_file.write_text(native_file_data)
+        self._meson_native_file.write_text(native_file_data, encoding='utf-8')
 
         # reconfigure if we have a valid Meson build directory. Meson
         # uses the presence of the 'meson-private/coredata.dat' file