Add an option to disable installation of test modules

The Python standard distribution comes with many test modules, that
are not necessarly useful on embedded targets.

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

---
 Makefile.pre.in |   40 +++++++++++++++++++++++++++-------------
 configure.in    |    6 ++++++
 2 files changed, 33 insertions(+), 13 deletions(-)

Index: b/Makefile.pre.in
===================================================================
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -960,27 +960,43 @@
 	plat-mac/lib-scriptpackages/SystemEvents \
 	plat-mac/lib-scriptpackages/Terminal
 PLATMACPATH=:plat-mac:plat-mac/lib-scriptpackages
-LIBSUBDIRS=	lib-tk lib-tk/test lib-tk/test/test_tkinter \
-		lib-tk/test/test_ttk site-packages test test/audiodata test/capath \
-		test/data test/cjkencodings test/decimaltestdata test/xmltestdata \
-		test/imghdrdata \
-		test/subprocessdata \
-		test/tracedmodules \
+LIBSUBDIRS=	lib-tk site-packages \
 		encodings compiler hotshot \
-		email email/mime email/test email/test/data \
+		email email/mime \
 		ensurepip ensurepip/_bundled \
-		json json/tests \
-		sqlite3 sqlite3/test \
-		logging bsddb bsddb/test csv importlib wsgiref \
-		lib2to3 lib2to3/fixes lib2to3/pgen2 lib2to3/tests \
-		lib2to3/tests/data lib2to3/tests/data/fixers lib2to3/tests/data/fixers/myfixes \
-		ctypes ctypes/test ctypes/macholib \
-		idlelib idlelib/Icons idlelib/idle_test \
-		distutils distutils/command distutils/tests $(XMLLIBSUBDIRS) \
+		json \
+		sqlite3  \
+		logging bsddb csv importlib wsgiref \
+		lib2to3 lib2to3/fixes lib2to3/pgen2 \
+		ctypes ctypes/macholib \
+		idlelib idlelib/Icons \
+		distutils distutils/command $(XMLLIBSUBDIRS) \
 		multiprocessing multiprocessing/dummy \
-		unittest unittest/test \
+		unittest \
 		lib-old \
 		curses pydoc_data $(MACHDEPS)
+
+TESTSUBDIRS = lib-tk/test lib-tk/test/test_tkinter \
+	lib-tk/test/test_ttk test test/audiodata test/capath test/data \
+	test/cjkencodings test/decimaltestdata test/xmltestdata \
+	test/imghdrdata \
+	test/subprocessdata \
+	test/tracedmodules \
+	email/test email/test/data \
+	json/tests \
+	sqlite3/test \
+	bsddb/test \
+	lib2to3/tests \
+ 	lib2to3/tests/data lib2to3/tests/data/fixers lib2to3/tests/data/fixers/myfixes \
+	ctypes/test \
+	idlelib/idle_test \
+	distutils/tests \
+	unittest/test
+
+ifeq (@TEST_MODULES@,yes)
+LIBSUBDIRS += $(TESTSUBDIRS)
+endif
+
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR) $(srcdir)/Modules/xxmodule.c
 	@for i in $(SCRIPTDIR) $(LIBDEST); \
 	do \
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -2628,6 +2628,12 @@
 fi
 
 
+AC_SUBST(TEST_MODULES)
+
+AC_ARG_ENABLE(test-modules,
+	AS_HELP_STRING([--disable-test-modules], [disable test modules]),
+	[ TEST_MODULES="${enableval}" ], [ TEST_MODULES=yes ])
+
 # Check for enable-ipv6
 AH_TEMPLATE(ENABLE_IPV6, [Define if --enable-ipv6 is specified])
 AC_MSG_CHECKING([if --enable-ipv6 is specified])