freetype: enable out-of-tree builds, and use host zlib

Add a few ${S} and ${B} to make out of tree builds work, and stop using
autotools-brokensep.  Annoyingly we still need to use a custom do_configure so
add a comment explaining why so someone else doesn't spend 30 minutes trying to
make it work.

Whilst here add a small patch so we don't need to tell the build where libtool
is, and remove class-native do_configure as it doesn't appear to be required
anymore.

At this point I started to get carried away.

The do_compile_prepend is redundant now that configure is being told what
compiler to use for build tools, so remove that.

Instead of using the integrated zlib fork, add a PACKAGECONFIG to use the zlib
we build and enable that by default.  Also add a disabled PACKAGECONFIG for
bzip2 support.

(From OE-Core rev: 80b53d9366455f5e9f654fee53c685aa8fd365e7)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/freetype/freetype/use-right-libtool.patch

@@ -0,0 +1,14 @@
+Freetype think that it knows best about where libtool is, and explicitly the
+libtool autoconf macros telling it where to find the libtool script.  Of course
+we prefix the script with the target triplet, so it's wrong.  Fix this by
+removing the forced assignment, so the configure script's knowledge of where it
+put libtool is used.
+
+Upstream-Status: Pending
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+--- freetype-2.6/builds/unix/unix-cc.in.orig	2016-01-07 19:21:45.244943479 +0000
++++ freetype-2.6/builds/unix/unix-cc.in	2016-01-07 19:21:50.213112131 +0000
+@@ -19,1 +18,1 @@
+-LIBTOOL := $(FT_LIBTOOL_DIR)/libtool
++LIBTOOL := $(FT_LIBTOOL_DIR)/@LIBTOOL@

meta/recipes-graphics/freetype/freetype_2.6.bb

@@ -13,48 +13,40 @@ LIC_FILES_CHKSUM = "file://docs/LICENSE.TXT;md5=c017ff17fc6f0794adf93db5559ccd56
 
 SECTION = "libs"
 
-SRC_URI = "${SOURCEFORGE_MIRROR}/freetype/freetype-${PV}.tar.bz2"
+SRC_URI = "${SOURCEFORGE_MIRROR}/freetype/freetype-${PV}.tar.bz2 \
+           file://use-right-libtool.patch"
 SRC_URI[md5sum] = "5682890cb0267f6671dd3de6eabd3e69"
 SRC_URI[sha256sum] = "8469fb8124764f85029cc8247c31e132a2c5e51084ddce2a44ea32ee4ae8347e"
 
 BINCONFIG = "${bindir}/freetype-config"
 
-inherit autotools-brokensep pkgconfig binconfig-disabled multilib_header
+inherit autotools pkgconfig binconfig-disabled multilib_header
 
-LIBTOOL = "${S}/builds/unix/${HOST_SYS}-libtool"
-EXTRA_OEMAKE = "'LIBTOOL=${LIBTOOL}'"
-EXTRA_OEMAKE_class-native = ""
-EXTRA_OECONF = "--without-zlib --without-bzip2 CC_BUILD='${BUILD_CC}'"
+EXTRA_OECONF = "CC_BUILD='${BUILD_CC}'"
 TARGET_CPPFLAGS += "-D_FILE_OFFSET_BITS=64"
 
-
-PACKAGECONFIG ??= ""
+PACKAGECONFIG ??= "zlib"
+PACKAGECONFIG[bzip2] = "--with-bzip2,--without-bzip2,bzip2"
+PACKAGECONFIG[zlib] = "--with-zlib,--without-zlib,zlib"
 PACKAGECONFIG[pixmap] = "--with-png,--without-png,libpng"
 # This results in a circular dependency so enabling is non-trivial
 PACKAGECONFIG[harfbuzz] = "--with-harfbuzz,--without-harfbuzz,harfbuzz"
 
 do_configure() {
-	cd builds/unix
+	# Need this because although the autotools infrastructure is in
+	# builds/unix the configure script get written to ${S}, so we can't
+	# just use AUTOTOOLS_SCRIPT_PATH.
+	cd ${S}/builds/unix
 	libtoolize --force --copy
 	aclocal -I .
 	gnu-configize --force
 	autoconf
-	cd ${S}
+	cd ${B}
 	oe_runconf
 }
 
-do_configure_class-native() {
-	(cd builds/unix && gnu-configize) || die "failure running gnu-configize"
-	oe_runconf
-}
-
-do_compile_prepend() {
-	${BUILD_CC} -o objs/apinames src/tools/apinames.c
-}
-
 do_install_append() {
 	oe_multilib_header freetype2/config/ftconfig.h
 }
 
 BBCLASSEXTEND = "native"
-