From a42283b5bee8bfd0a6a39e6805787643d075f1a5 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date: Wed, 23 Dec 2015 11:48:44 +0100
Subject: [PATCH] Add an option to disable lib2to3

lib2to3 is a library to convert Python 2.x code to Python 3.x. As
such, it is probably not very useful on embedded system targets.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
---
 Makefile.pre.in | 16 ++++++++++++----
 configure.ac    |  6 ++++++
 setup.py        |  5 +++--
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/Makefile.pre.in b/Makefile.pre.in
index 83fc343..aeedad9 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1164,7 +1164,9 @@ ifeq (@PYDOC@,yes)
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s pydoc$(VERSION) pydoc3)
 endif
 	-rm -f $(DESTDIR)$(BINDIR)/2to3
+ifeq (@LIB2TO3@,yes)
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s 2to3-$(VERSION) 2to3)
+endif
 	-rm -f $(DESTDIR)$(BINDIR)/pyvenv
 	(cd $(DESTDIR)$(BINDIR); $(LN) -s pyvenv-$(VERSION) pyvenv)
 	if test "x$(LIPO_32BIT_FLAGS)" != "x" ; then \
@@ -1203,7 +1205,6 @@ LIBSUBDIRS=	tkinter \
 		html json http dbm xmlrpc \
 		sqlite3 \
 		logging csv wsgiref urllib \
-		lib2to3 lib2to3/fixes lib2to3/pgen2 \
 		ctypes ctypes/macholib \
 		idlelib idlelib/Icons \
 		distutils distutils/command $(XMLLIBSUBDIRS) \
@@ -1250,9 +1251,6 @@ TESTSUBDIRS = 	tkinter/test tkinter/test/test_tkinter tkinter/test/test_ttk \
                 test/test_importlib/namespace_pkgs/module_and_namespace_package \
                 test/test_importlib/namespace_pkgs/module_and_namespace_package/a_test \
 		sqlite3/test \
-		lib2to3/tests \
-		lib2to3/tests/data lib2to3/tests/data/fixers \
-		lib2to3/tests/data/fixers/myfixes \
 		ctypes/test \
 		idlelib/idle_test \
 		distutils/tests \
@@ -1265,6 +1263,14 @@ ifeq (@PYDOC@,yes)
 LIBSUBDIRS += pydoc_data
 endif
 
+ifeq (@LIB2TO3@,yes)
+LIBSUBDIRS += lib2to3 lib2to3/fixes lib2to3/pgen2
+TESTSUBDIRS += lib2to3/tests			\
+	lib2to3/tests/data			\
+	lib2to3/tests/data/fixers		\
+	lib2to3/tests/data/fixers/myfixes
+endif
+
 ifeq (@TEST_MODULES@,yes)
 LIBSUBDIRS += $(TESTSUBDIRS)
 endif
@@ -1363,10 +1369,12 @@ ifeq (@PYC_BUILD@,yes)
 		-d $(LIBDEST)/site-packages -f \
 		-x badsyntax $(DESTDIR)$(LIBDEST)/site-packages
 endif
+ifeq (@LIB2TO3@,yes)
 	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
 		$(PYTHON_FOR_BUILD) -m lib2to3.pgen2.driver $(DESTDIR)$(LIBDEST)/lib2to3/Grammar.txt
 	-PYTHONPATH=$(DESTDIR)$(LIBDEST) $(RUNSHARED) \
 		$(PYTHON_FOR_BUILD) -m lib2to3.pgen2.driver $(DESTDIR)$(LIBDEST)/lib2to3/PatternGrammar.txt
+endif
 
 # Create the PLATDIR source directory, if one wasn't distributed..
 $(srcdir)/Lib/$(PLATDIR):
diff --git a/configure.ac b/configure.ac
index eea25d4..32239d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2988,6 +2988,12 @@ AC_ARG_ENABLE(test-modules,
 	AS_HELP_STRING([--disable-test-modules], [disable test modules]),
 	[ TEST_MODULES="${enableval}" ], [ TEST_MODULES=yes ])
 
+AC_SUBST(LIB2TO3)
+
+AC_ARG_ENABLE(lib2to3,
+	AS_HELP_STRING([--disable-lib2to3], [disable lib2to3]),
+	[ LIB2TO3="${enableval}" ], [ LIB2TO3=yes ])
+
 # Check for enable-ipv6
 AH_TEMPLATE(ENABLE_IPV6, [Define if --enable-ipv6 is specified])
 AC_MSG_CHECKING([if --enable-ipv6 is specified])
diff --git a/setup.py b/setup.py
index 2a01896..be27531 100644
--- a/setup.py
+++ b/setup.py
@@ -2254,10 +2254,11 @@ def main():
     import warnings
     warnings.filterwarnings("ignore",category=DeprecationWarning)
 
-    scripts = ['Tools/scripts/idle3', 'Tools/scripts/2to3',
-               'Lib/smtpd.py']
+    scripts = ['Tools/scripts/idle3', 'Lib/smtpd.py']
     if not '--disable-pydoc' in sysconfig.get_config_var("CONFIG_ARGS"):
         scripts += [ 'Tools/scripts/pydoc3' ]
+    if not '--disable-lib2to3' in sysconfig.get_config_var("CONFIG_ARGS"):
+        scripts += [ 'Tools/scripts/2to3' ]
 
     setup(# PyPI Metadata (PEP 301)
           name = "Python",
-- 
2.7.4