python3: Use _sysconfigdata.py to initialize distutils.sysconfig

Porting patch from
<409482251b>
to use _sysconfigdata.py to initialize distutils.sysconfig.

This patch makes that distutils.sysconfig doesn't need config-*/Makefile
in libdir any more. Next we can move it from python3-misc to python3-dev
package.

(From OE-Core rev: 659a80afc5894658f8b82fcd62ebe3562b441db9)

Signed-off-by: Li Zhou <li.zhou@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3/0001-Issue-21272-Use-_sysconfigdata.py-to-initialize-dist.patch

@@ -0,0 +1,66 @@
+From bcddbf40c7f1b80336268cdddacc17369fb0ccea Mon Sep 17 00:00:00 2001
+From: Libin Dang <libin.dang@windriver.com>
+Date: Tue, 11 Apr 2017 14:12:15 +0800
+Subject: [PATCH] Issue #21272: Use _sysconfigdata.py to initialize
+ distutils.sysconfig
+
+Backport upstream commit
+https://github.com/python/cpython/commit/409482251b06fe75c4ee56e85ffbb4b23d934159
+
+Upstream-Status: Backport
+
+Signed-off-by: Li Zhou <li.zhou@windriver.com>
+---
+ Lib/distutils/sysconfig.py | 35 ++++-------------------------------
+ 1 file changed, 4 insertions(+), 31 deletions(-)
+
+diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
+index 6d5cfd0..9925d24 100644
+--- a/Lib/distutils/sysconfig.py
++++ b/Lib/distutils/sysconfig.py
+@@ -424,38 +424,11 @@ _config_vars = None
+ 
+ def _init_posix():
+     """Initialize the module as appropriate for POSIX systems."""
+-    g = {}
+-    # load the installed Makefile:
+-    try:
+-        filename = get_makefile_filename()
+-        parse_makefile(filename, g)
+-    except OSError as msg:
+-        my_msg = "invalid Python installation: unable to open %s" % filename
+-        if hasattr(msg, "strerror"):
+-            my_msg = my_msg + " (%s)" % msg.strerror
+-
+-        raise DistutilsPlatformError(my_msg)
+-
+-    # load the installed pyconfig.h:
+-    try:
+-        filename = get_config_h_filename()
+-        with open(filename) as file:
+-            parse_config_h(file, g)
+-    except OSError as msg:
+-        my_msg = "invalid Python installation: unable to open %s" % filename
+-        if hasattr(msg, "strerror"):
+-            my_msg = my_msg + " (%s)" % msg.strerror
+-
+-        raise DistutilsPlatformError(my_msg)
+-
+-    # On AIX, there are wrong paths to the linker scripts in the Makefile
+-    # -- these paths are relative to the Python source, but when installed
+-    # the scripts are in another directory.
+-    if python_build:
+-        g['LDSHARED'] = g['BLDSHARED']
+-
++    # _sysconfigdata is generated at build time, see the sysconfig module
++    from _sysconfigdata import build_time_vars
+     global _config_vars
+-    _config_vars = g
++    _config_vars = {}
++    _config_vars.update(build_time_vars)
+ 
+ 
+ def _init_nt():
+-- 
+1.8.3.1
+

meta/recipes-devtools/python/python3_3.5.3.bb

@@ -36,6 +36,7 @@ SRC_URI += "\
             file://setup.py-find-libraries-in-staging-dirs.patch \
             file://configure.ac-fix-LIBPL.patch \
             file://upstream-random-fixes.patch \
+            file://0001-Issue-21272-Use-_sysconfigdata.py-to-initialize-dist.patch \
            "
 SRC_URI[md5sum] = "57d1f8bfbabf4f2500273fb0706e6f21"
 SRC_URI[sha256sum] = "eefe2ad6575855423ab630f5b51a8ef6e5556f774584c06beab4926f930ddbb0"