xdelta3: add optional lzma support

Using PACKAGECONFIG. Disabled by default.

Signed-off-by: Matthieu Crapet <Matthieu.Crapet@ingenico.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/xdelta/files/with-liblzma-configure-option.patch

@@ -0,0 +1,55 @@
+Upstream-Status: Pending, Submitted
+http://code.google.com/p/xdelta/issues/detail?id=178
+
+xdelta3: add --with-liblzma configure option
+
+As xdelta3 can be compiled with or without liblzma external library, make it configurable.
+Default is autodetect (unchanged behavior).
+
+Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
+---
+ configure.ac | 21 +++++++++++++++++++--
+ 1 file changed, 19 insertions(+), 2 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 3b430d7..8c53ba8 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -8,8 +8,6 @@ AM_INIT_AUTOMAKE([1.9 no-define foreign tar-ustar])
+ AX_CHECK_ALIGNED_ACCESS_REQUIRED
+ AC_PROG_CC
+ AC_PROG_CXX
+-AC_CHECK_HEADERS([lzma.h])
+-AC_CHECK_LIB(lzma, lzma_easy_buffer_encode)
+ AC_CHECK_SIZEOF(size_t)
+ #AM_PATH_PYTHON(,, [:])
+ #AM_CONDITIONAL([HAVE_PYTHON], [test "$PYTHON" != :])
+@@ -22,6 +20,25 @@ AC_ARG_ENABLE(debug-symbols,
+    AS_HELP_STRING(--enable-debug-symbols,[Build with debug symbols (default is NO)]),,enableval=no)
+ AM_CONDITIONAL([DEBUG_SYMBOLS], [test ${enableval} = "yes"])
+ 
++AC_ARG_WITH(
++    [liblzma],
++    [AC_HELP_STRING(
++        [--with-liblzma],
++        [build with liblzma support @<:@default=autodetect@:>@])],
++    [USE_LIBLZMA=$withval],
++    [USE_LIBLZMA=auto])
++
++if test "x$USE_LIBLZMA" != xno ; then
++    AC_CHECK_HEADERS([lzma.h],,[
++        if test "x$with_liblzma" = xyes ; then
++            AC_MSG_FAILURE([liblzma includes was not found])
++        fi])
++    AC_CHECK_LIB([lzma], [lzma_easy_buffer_encode],,[
++        if test "x$with_liblzma" = xyes ; then
++            AC_MSG_FAILURE([liblzma library was not found])
++        fi])
++fi
++
+ AC_CONFIG_HEADERS([config.h])
+ AC_CONFIG_FILES([Makefile])
+ AC_OUTPUT
+-- 
+1.8.5.4
+

meta-oe/recipes-support/xdelta/xdelta3_3.0.8.bb

@@ -8,8 +8,14 @@ LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=393a5ca445f6965873eca0259a17f833"
 
 SRC_URI = "http://xdelta.googlecode.com/files/${BPN}-${PV}.tar.xz \
-           file://compilation-fix.patch"
+           file://compilation-fix.patch \
+           file://with-liblzma-configure-option.patch \
+"
 SRC_URI[md5sum] = "c3ae3286ce4193de8e03d5bcaccf3bc3"
 SRC_URI[sha256sum] = "3a86f29c95664fb44b8a40ff22d9bcc3e87aa8c01f0ff75931a7fa78ed3d2e55"
 
 inherit autotools
+
+# Optional secondary compression
+PACKAGECONFIG ??= ""
+PACKAGECONFIG[lzma] = "--with-liblzma,--without-liblzma,xz"