Add an option to disable the tk module

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

---
 Makefile.pre.in |   14 ++++++++++----
 configure.in    |    9 +++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)

Index: b/Makefile.pre.in
===================================================================
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -960,7 +960,7 @@
 	plat-mac/lib-scriptpackages/SystemEvents \
 	plat-mac/lib-scriptpackages/Terminal
 PLATMACPATH=:plat-mac:plat-mac/lib-scriptpackages
-LIBSUBDIRS=	lib-tk site-packages \
+LIBSUBDIRS=	site-packages \
 		encodings compiler hotshot \
 		email email/mime \
 		ensurepip ensurepip/_bundled \
@@ -974,8 +974,7 @@
 		lib-old \
 		curses $(MACHDEPS)
 
-TESTSUBDIRS = lib-tk/test lib-tk/test/test_tkinter \
-	lib-tk/test/test_ttk test test/audiodata test/capath test/data \
+TESTSUBDIRS = test test/audiodata test/capath test/data \
 	test/cjkencodings test/decimaltestdata test/xmltestdata \
 	test/imghdrdata \
 	test/subprocessdata \
@@ -1009,6 +1008,12 @@
 TESTSUBDIRS += sqlite3/test
 endif
 
+ifeq (@TK@,yes)
+LIBSUBDIRS += lib-tk
+TESTSUBDIRS += lib-tk/test lib-tk/test/test_tkinter	\
+	      lib-tk/test/test_ttk
+endif
+
 libinstall:	build_all $(srcdir)/Lib/$(PLATDIR) $(srcdir)/Modules/xxmodule.c
 	@for i in $(SCRIPTDIR) $(LIBDEST); \
 	do \
Index: b/configure.ac
===================================================================
--- a/configure.ac
+++ b/configure.ac
@@ -2642,6 +2642,15 @@
    DISABLED_EXTENSIONS="${DISABLED_EXTENSIONS} _sqlite3"
 fi
 
+AC_SUBST(TK)
+AC_ARG_ENABLE(tk,
+	AS_HELP_STRING([--disable-tk], [disable tk]),
+	[ TK="${enableval}" ], [ TK=yes ])
+
+if test "$TK" = "no"; then
+   DISABLED_EXTENSIONS="${DISABLED_EXTENSIONS} _tkinter"
+fi
+
 AC_SUBST(PYDOC)
 
 AC_ARG_ENABLE(pydoc,