bpo-43774: Document configure options (GH-25283)
Add Doc/using/configure.rst documentation to document configure,
preprocessor, compiler and linker options.
Add a new section about the "Python debug build".
diff --git a/Doc/library/devmode.rst b/Doc/library/devmode.rst
index e6ed594..44e7d4f 100644
--- a/Doc/library/devmode.rst
+++ b/Doc/library/devmode.rst
@@ -13,6 +13,8 @@
It can be enabled using the :option:`-X dev <-X>` command line option or by
setting the :envvar:`PYTHONDEVMODE` environment variable to ``1``.
+See also :ref:`Python debug build <debug-build>`.
+
Effects of the Python Development Mode
======================================