expat: use gzip-native for unpack

expat 2.0.1 archive is generated with DOS format, which causes CRC
error for some version of gzip (<1.4), e.g. on Unbuntu 10.04. This
commit adds do_unpack dependency to gzip-native, and thus to use
local compiled binary to address this issue. Since 1.4 is a known
version solving this issue, also specify a default version for
gzip-native

also move most lines into expat.inc as cleanup

Signed-off-by: Kevin Tian <kevin.tian@intel.com>

meta/conf/distro/include/poky-default.inc

@@ -42,6 +42,9 @@ PREFERRED_VERSION_glibc-nativesdk ?= "${GLIBCVERSION}"
 PREFERRED_VERSION_glibc-initial ?= "${GLIBCVERSION}"
 PREFERRED_VERSION_glibc-initial-nativesdk ?= "${GLIBCVERSION}"
 PREFERRED_VERSION_elfutils ?= "0.148"
+# don't use version earlier than 1.4 for gzip-native, as it's necessary for
+# some packages using an archive format incompatible with earlier gzip
+PREFERRED_VERSION_gzip-native ?= "1.4"
 
 require conf/distro/include/as-needed.inc
 

meta/packages/expat/expat.inc

@@ -3,7 +3,17 @@ HOMEPAGE = "http://expat.sourceforge.net/"
 SECTION = "libs"
 LICENSE = "MIT"
 
-SRC_URI = "${SOURCEFORGE_MIRROR}/expat/expat-${PV}.tar.gz"
+SRC_URI = "${SOURCEFORGE_MIRROR}/expat/expat-${PV}.tar.gz \
+           file://autotools.patch"
 
-inherit autotools
+inherit autotools lib_package
 
+# This package uses an archive format known to have issue with some
+# versions of gzip
+do_unpack[depends] += "gzip-native:do_populate_sysroot"
+
+do_configure_prepend () {
+	rm -f ${S}/conftools/libtool.m4
+}
+
+BBCLASSEXTEND = "native nativesdk"

meta/packages/expat/expat_2.0.1.bb

@@ -1,12 +1,3 @@
 require expat.inc
+
 PR = "r0"
-
-SRC_URI += "file://autotools.patch;"
-
-inherit lib_package
-
-do_configure_prepend () {
-	rm -f ${S}/conftools/libtool.m4
-}
-
-BBCLASSEXTEND = "native nativesdk"