Write deprecation warnings to stderr.

meson.py

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mesonbuild import mlog, mesonmain, mesonlib
+from mesonbuild import mesonmain, mesonlib
 import sys, os, locale
 
 def main():
@@ -24,11 +24,11 @@ def main():
     # encoding, so we can just warn about it.
     e = locale.getpreferredencoding()
     if e.upper() != 'UTF-8' and not mesonlib.is_windows():
-        mlog.warning('You are using {!r} which is not a a Unicode-compatible '
-                     'locale.'.format(e))
-        mlog.warning('You might see errors if you use UTF-8 strings as '
-                     'filenames, as strings, or as file contents.')
-        mlog.warning('Please switch to a UTF-8 locale for your platform.')
+        print('Warning: You are using {!r} which is not a a Unicode-compatible '
+              'locale.'.format(e), file=sys.stderr)
+        print('You might see errors if you use UTF-8 strings as '
+              'filenames, as strings, or as file contents.', file=sys.stderr)
+        print('Please switch to a UTF-8 locale for your platform.', file=sys.stderr)
     # Always resolve the command path so Ninja can find it for regen, tests, etc.
     launcher = os.path.realpath(sys.argv[0])
     return mesonmain.run(sys.argv[1:], launcher)

mesonconf.py

@@ -14,9 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mesonbuild import mesonmain, mlog
+from mesonbuild import mesonmain
 import sys
 
 if __name__ == '__main__':
-    mlog.warning('This executable is deprecated, use "meson configure" instead.')
+    print('Warning: This executable is deprecated. Use "meson configure" instead.',
+          file=sys.stderr)
     sys.exit(mesonmain.run(['configure'] + sys.argv[1:]))

mesonintrospect.py

@@ -14,9 +14,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mesonbuild import mesonmain, mlog
+from mesonbuild import mesonmain
 import sys
 
 if __name__ == '__main__':
-    mlog.warning('This executable is deprecated. Use "meson introspect" instead.')
+    print('Warning: This executable is deprecated. Use "meson introspect" instead.',
+          file=sys.stderr)
     sys.exit(mesonmain.run(['introspect'] + sys.argv[1:]))

mesonrewriter.py

@@ -27,6 +27,7 @@
 import sys
 
 if __name__ == '__main__':
-    mlog.warning('This program is deprecated, use "meson rewrite" instead')
+    print('Warning: This executable is deprecated. Use "meson rewrite" instead.',
+          file=sys.stderr)
     sys.exit(mesonmain.run(['rewrite'] + sys.argv[1:]))
 

mesontest.py

@@ -16,9 +16,10 @@
 
 # A tool to run tests in many different ways.
 
-from mesonbuild import mesonmain, mlog
+from mesonbuild import mesonmain
 import sys
 
 if __name__ == '__main__':
-    mlog.warning('This executable is deprecated, use "meson test" instead.')
+    print('Warning: This executable is deprecated. Use "meson test" instead.',
+          file=sys.stderr)
     sys.exit(mesonmain.run(['test'] + sys.argv[1:]))