[OE-core] [PATCH 2/6] python-native: Point to expat in native sysroot and add missing dep on expat-native

[Khem Raj]

This fixes inconsistency where expat dependency is
then depending upon build host having it or not having it

Fixes errors like
WARNING: renaming "pyexpat" since importing it failed: build/lib.linux-x86_64-2.7/pyexpat.so: undefined symbol: XML_SetCommentHandler

also reported here
https://dev.openwrt.org/ticket/20087

This work due to the fact that we use -isystem pointing to native sysroot
so the search order of native includedir is moved after buildhosts system
includdirs. Moment we replace it with -I, build falls apart

This also fixes the error

Caught exception: <type 'exceptions.ImportError'> ImportError('No module named _elementtree',)

where gobject-introspection-native fails to find _elementtree
which is only compiled if expat is available

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 meta/recipes-devtools/python/python-native_2.7.11.bb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta/recipes-devtools/python/python-native_2.7.11.bb b/meta/recipes-devtools/python/python-native_2.7.11.bb
index 4c204a4..abb69fc 100644
--- a/meta/recipes-devtools/python/python-native_2.7.11.bb
+++ b/meta/recipes-devtools/python/python-native_2.7.11.bb
@@ -1,7 +1,7 @@
 require python.inc
 
 EXTRANATIVEPATH += "bzip2-native"
-DEPENDS = "openssl-native bzip2-replacement-native zlib-native readline-native sqlite3-native"
+DEPENDS = "openssl-native bzip2-replacement-native zlib-native readline-native sqlite3-native expat-native"
 PR = "${INC_PR}.1"
 
 SRC_URI += "\
@@ -27,7 +27,7 @@ inherit native
 
 RPROVIDES += "python-distutils-native python-compression-native python-textutils-native python-codecs-native python-core-native python-unittest-native"
 
-EXTRA_OECONF_append = " --bindir=${bindir}/${PN}"
+EXTRA_OECONF_append = " --bindir=${bindir}/${PN} --with-system-expat=${STAGING_DIR_HOST}"
 
 EXTRA_OEMAKE = '\
   BUILD_SYS="" \
-- 
2.8.2