python3: fix for cross compiling

Fixed:
* python3 has introduced _PYTHON_PROJECT_BASE which is used for separate
  B and S, but it doesn't work when compile Modules, the target python3 runs
  python3-native's sysconfig to get srcdir which is the native's, there
  would be errors when native's srcdir has been removed, add
  _PYTHON_PROJECT_SRC to fix the problem.

* Check cross_compiling when get FLAGS

(From OE-Core rev: c33639963491f00f55b80299922895fe68b0637d)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/meta/recipes-devtools/python/python3/sysconfig.py-add-_PYTHON_PROJECT_SRC.patch b/meta/recipes-devtools/python/python3/sysconfig.py-add-_PYTHON_PROJECT_SRC.patch
new file mode 100644
index 0000000000..de07643f2b
--- /dev/null
+++ b/meta/recipes-devtools/python/python3/sysconfig.py-add-_PYTHON_PROJECT_SRC.patch
@@ -0,0 +1,54 @@
+From fc93b3cc23b4f9698ae92a42986dbb02b6f19588 Mon Sep 17 00:00:00 2001
+From: Robert Yang <liezhi.yang@windriver.com>
+Date: Sun, 18 Jan 2015 06:29:50 -0800
+Subject: [PATCH] sysconfig.py: add _PYTHON_PROJECT_SRC
+
+python3 has introduced _PYTHON_PROJECT_BASE which is used for separate B
+and S, but it doesn't work when compile Modules, the target python3 runs
+python3-native's sysconfig to get srcdir which is the native's, there
+would be errors when native's srcdir has been removed, add
+_PYTHON_PROJECT_SRC to fix the problem.
+
+Upstream-Status: Pending
+
+Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
+---
+ Lib/distutils/sysconfig.py |    5 ++++-
+ Lib/sysconfig.py           |    5 ++++-
+ 2 files changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
+index a545ab9..74317d1 100644
+--- a/Lib/distutils/sysconfig.py
++++ b/Lib/distutils/sysconfig.py
+@@ -554,7 +554,10 @@ def get_config_vars(*args):
+         _config_vars['exec_prefix'] = EXEC_PREFIX
+ 
+         # Always convert srcdir to an absolute path
+-        srcdir = _config_vars.get('srcdir', project_base)
++        if "_PYTHON_PROJECT_SRC" in os.environ:
++            srcdir = os.path.abspath(os.environ["_PYTHON_PROJECT_SRC"])
++        else:
++            srcdir = _config_vars.get('srcdir', project_base)
+         if os.name == 'posix':
+             if python_build:
+                 # If srcdir is a relative path (typically '.' or '..')
+diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
+index 7287f11..cc92998 100644
+--- a/Lib/sysconfig.py
++++ b/Lib/sysconfig.py
+@@ -562,7 +562,10 @@ def get_config_vars(*args):
+         _CONFIG_VARS['userbase'] = _getuserbase()
+ 
+         # Always convert srcdir to an absolute path
+-        srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
++        if "_PYTHON_PROJECT_SRC" in os.environ:
++            srcdir = os.path.abspath(os.environ["_PYTHON_PROJECT_SRC"])
++        else:
++            srcdir = _CONFIG_VARS.get('srcdir', _PROJECT_BASE)
+         if os.name == 'posix':
+             if _PYTHON_BUILD:
+                 # If srcdir is a relative path (typically '.' or '..')
+-- 
+1.7.9.5
+