Add an option to disable pydoc

It removes 0.5 MB of data from the target plus the pydoc script
itself.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>

---
 Makefile.pre.in |    8 +++++++-
 configure.ac    |    5 +++++
 setup.py        |    9 +++++++--
 3 files changed, 19 insertions(+), 3 deletions(-)

Index: b/Makefile.pre.in
===================================================================
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1102,7 +1102,9 @@
 	-rm -f $(DESTDIR)$(BINDIR)/idle3
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s idle$(VERSION) idle3)
 	-rm -f $(DESTDIR)$(BINDIR)/pydoc3
+ifeq (@PYDOC@,yes)
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s pydoc$(VERSION) pydoc3)
+endif
 	-rm -f $(DESTDIR)$(BINDIR)/2to3
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s 2to3-$(VERSION) 2to3)
 	-rm -f $(DESTDIR)$(BINDIR)/pyvenv
@@ -1153,7 +1155,7 @@
 		multiprocessing multiprocessing/dummy \
 		unittest \
 		venv venv/scripts venv/scripts/posix \
-		curses pydoc_data $(MACHDEPS)
+		curses $(MACHDEPS)
 
 TESTSUBDIRS = 	tkinter/test tkinter/test/test_tkinter tkinter/test/test_ttk \
 		test test/test_asyncio \
@@ -1197,6 +1199,10 @@
 		test/test_importlib/import_ test/test_importlib/source \
 		unittest/test unittest/test/testmock
 
+ifeq (@PYDOC@,yes)
+LIBSUBDIRS += pydoc_data
+endif
+
 ifeq (@TEST_MODULES@,yes)
 LIBSUBDIRS += $(TESTSUBDIRS)
 endif
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -2672,6 +2672,11 @@
       AC_CHECK_FUNCS(pthread_atfork)
 fi
 
+AC_SUBST(PYDOC)
+
+AC_ARG_ENABLE(pydoc,
+	AS_HELP_STRING([--disable-pydoc], [disable pydoc]),
+	[ PYDOC="${enableval}" ], [ PYDOC=yes ])
 
 AC_SUBST(TEST_MODULES)
 
Index: b/setup.py
===================================================================
--- a/setup.py
+++ b/setup.py
@@ -2212,6 +2212,12 @@
     # turn off warnings when deprecated modules are imported
     import warnings
     warnings.filterwarnings("ignore",category=DeprecationWarning)
+
+    scripts = ['Tools/scripts/idle3', 'Tools/scripts/2to3',
+               'Lib/smtpd.py']
+    if not '--disable-pydoc' in sysconfig.get_config_var("CONFIG_ARGS"):
+        scripts += [ 'Tools/scripts/pydoc3' ]
+
     setup(# PyPI Metadata (PEP 301)
           name = "Python",
           version = sys.version.split()[0],
@@ -2236,8 +2242,7 @@
           # If you change the scripts installed here, you also need to
           # check the PyBuildScripts command above, and change the links
           # created by the bininstall target in Makefile.pre.in
-          scripts = ["Tools/scripts/pydoc3", "Tools/scripts/idle3",
-                     "Tools/scripts/2to3", "Tools/scripts/pyvenv"]
+          scripts = scripts,
         )
 
 # --install-platlib