python: add a PACKAGECONFIG for _tkinter

Currently _tkinter is only built when tcl/tk is available before the
python do_configure task is built.

Make this deterministic by providing a PACKAGECONFIG for it.
If tkinter is in PACKAGECONFIG add the needed dependencies,
if not force that tkinter is not built.

Note that currently enabling tkinter does not work due to a cyclic
dependency:
'python' depends on 'tk/tcl' depends on 'cracklib' depends on 'python'

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/recipes-devtools/python/python_2.7.9.bbappend b/recipes-devtools/python/python_2.7.9.bbappend
new file mode 100644
index 0000000..ff0071f
--- /dev/null
+++ b/recipes-devtools/python/python_2.7.9.bbappend
@@ -0,0 +1,19 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/python:"
+
+SRC_URI_remove = "file://avoid_warning_about_tkinter.patch"
+
+PACKAGECONFIG ?= ""
+
+PACKAGECONFIG[tkinter] = ",,tk"
+PACKAGECONFIG_remove_class-native = "tkinter"
+PACKAGECONFIG_remove_class-nativesdk = "tkinter"
+RDEPENDS_${PN}-tkinter_append += "${@base_contains('PACKAGECONFIG', 'tkinter', 'tcl tk', '', d)}"
+SRC_URI += " \
+  ${@base_contains('PACKAGECONFIG', 'tkinter', '', 'file://dont_build_tkinter.patch', d)} \
+"
+python __anonymous() {
+    if not 'openembedded-layer' in d.getVar('BBFILE_COLLECTIONS'):
+        if 'tkinter' in d.getVar('PACKAGECONFIG'):
+            bb.error('Python PACKAGECONFIG tkinter requires tk provided by' \
+                     'meta-oe layer but the layer is not available.')
+}