Merge pull request numpy#14568 from mattip/hide-config-probe2

BLD, DOC: fix numpygh-14518, add release note

doc/release/upcoming_changes/14518.change.rst

@@ -0,0 +1,18 @@
+Add options to quiet build configuration and build with ``-Werror``
+-------------------------------------------------------------------
+Added two new configuration options. During the ``build_src`` subcommand, as
+part of configuring NumPy, the files ``_numpyconfig.h`` and ``config.h`` are
+created by probing support for various runtime functions and routines.
+Previously, the very verbose compiler output during this stage clouded more
+important information. By default the output is silenced. Running ``runtests.py
+--debug-configure`` will add ``-v`` to the ``build_src`` subcommand, which
+will restore the previous behaviour.
+
+Adding ``CFLAGS=-Werror`` to turn warnings into errors would trigger errors
+during the configuration. Now ``runtests.py --warn-error`` will add
+``--warn-error`` to the ``build`` subcommand, which will percolate to the
+``build_ext`` and ``build_lib`` subcommands. This will add the compiler flag
+to those stages and turn compiler warnings into errors while actually building
+NumPy itself, avoiding the ``build_src`` subcommand compiler calls.
+
+(`gh-14527 <https://github.com/numpy/numpy/pull/14527>`__)

numpy/distutils/command/build_src.py

@@ -79,7 +79,7 @@ def initialize_options(self):
         self.swig_opts = None
         self.swig_cpp = None
         self.swig = None
-        self.verbose = False
+        self.verbose = None
 
     def finalize_options(self):
         self.set_undefined_options('build',