diff --git a/xz-5.0.5.tar.gz b/xz-5.0.5.tar.gz
new file mode 100644
index 0000000..2a7bf41
--- /dev/null
+++ b/xz-5.0.5.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5dcffe6a3726d23d1711a65288de2e215b4960da5092248ce63c99d50093b93a
+size 1305685
diff --git a/xz-5.0.5.tar.gz.sig b/xz-5.0.5.tar.gz.sig
new file mode 100644
index 0000000..094e712
Binary files /dev/null and b/xz-5.0.5.tar.gz.sig differ
diff --git a/xz-5.0.5.tar.xz b/xz-5.0.5.tar.xz
deleted file mode 100644
index 58634d2..0000000
--- a/xz-5.0.5.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3515c74d170d0f6ec00820de63106ad16c07bae55a59c174b4741242c76264a4
-size 928700
diff --git a/xz.changes b/xz.changes
index 7676a3b..1728c06 100644
--- a/xz.changes
+++ b/xz.changes
@@ -1,3 +1,17 @@
+-------------------------------------------------------------------
+Sun Nov 24 16:25:53 UTC 2013 - andreas.stieger@gmx.de
+
+- add optional -static-devel library package, intended to publish pixz for
+  CentOS / RHEL, default off
+
+-------------------------------------------------------------------
+Wed Oct 16 08:53:16 UTC 2013 - mvyskocil@suse.com
+
+- Use gzipped archive to prevent a build cycle on older targets
+  * http://lists.opensuse.org/opensuse-buildservice/2013-10/msg00079.html
+- Add a signature and keyring file for source verification
+  * not enable in spec due bootstrapping issues
+
 -------------------------------------------------------------------
 Tue Jul 16 13:52:16 UTC 2013 - idonmez@suse.com
 
diff --git a/xz.keyring b/xz.keyring
new file mode 100644
index 0000000..7e82196
--- /dev/null
+++ b/xz.keyring
@@ -0,0 +1,56 @@
+pub   4096R/69184620 2010-10-24
+uid                  Lasse Collin <lasse.collin@tukaani.org>
+sub   4096R/58ADF744 2010-10-24
+
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v2.0.22 (GNU/Linux)
+
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+wOSlnSuT
+=u8YC
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/xz.spec b/xz.spec
index 9f0a347..9103b70 100644
--- a/xz.spec
+++ b/xz.spec
@@ -16,15 +16,26 @@
 #
 
 
+%if 0%{?centos_version} || 0%{?rhel_version}
+%if 0%{?centos_version} <= 600 || 0%{?rhel_version <= 600}
+%bcond_without static_libs
+%endif
+%else
+%bcond_with    static_libs
+%endif
+
 Name:           xz
 Summary:        A Program for Compressing Files
 License:        LGPL-2.1+ and GPL-2.0+
 Group:          Productivity/Archiving/Compression
 Version:        5.0.5
 Release:        0
-Url:            http://tukaani.org/lzma/
-Source:         http://tukaani.org/xz/%{name}-%{version}.tar.xz
+Url:            http://tukaani.org/xz/
+Source0:        http://tukaani.org/xz/%{name}-%{version}.tar.gz
+Source1:        http://tukaani.org/xz/%{name}-%{version}.tar.gz.sig
 Source2:        baselibs.conf
+# from http://tukaani.org/misc/lasse_collin_pubkey.txt#/xz.keyring
+Source3:        xz.keyring
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  pkgconfig
 Provides:       lzma = %version
@@ -83,22 +94,43 @@ Obsoletes:      lzma-alpha-devel < %version
 This package contains the header files and libraries needed for
 compiling programs using the LZMA library.
 
+%if %{with static_libs}
+%package static-devel
+Summary:        Static version of LZMA library
+Group:          Development/Libraries/C and C++
+Requires:       lzma-devel = %version
+
+%description static-devel
+Static library for the LZMA library 
+%endif
+
 %prep
 %setup -q
 
 %build
+%global optflags    %{optflags} -D_REENTRANT -pipe
 %if %{do_profiling}
 profiledir=$(mktemp -d)
 trap "rm -rf $profiledir" EXIT
 export CFLAGS="%optflags %{cflags_profile_generate}=$profiledir"
 %endif
-%configure --disable-static --with-pic --docdir=%_docdir/%name
+%configure \
+%if ! %{with static_libs}
+	--disable-static \
+%endif
+	--with-pic \
+	--docdir=%_docdir/%name
 make %{?_smp_mflags}
 %if %{do_profiling}
 time make check
 make clean
 export CFLAGS="%optflags %{cflags_profile_feedback}=$profiledir"
-%configure --disable-static --with-pic --docdir=%_docdir/%name
+%configure \
+%if %{without static_libs}
+	--disable-static \
+%endif
+	--with-pic \
+	--docdir=%_docdir/%name
 make %{?_smp_mflags}
 %endif
 
@@ -117,11 +149,13 @@ make install DESTDIR=$RPM_BUILD_ROOT
 %if 0%{?lang_package:1} > 0
 
 %files lang -f %{name}.lang
+%defattr(-, root, root)
 
 %files
 %else
 
 %files -f %{name}.lang
+%defattr(-, root, root)
 %endif
 %defattr(-, root, root)
 %_docdir/%name
@@ -139,4 +173,10 @@ make install DESTDIR=$RPM_BUILD_ROOT
 %{_libdir}/lib*.so
 %{_libdir}/pkgconfig/*.pc
 
+%if %{with static_libs}
+%files static-devel
+%defattr(-, root, root)
+%{_libdir}/*.a
+%endif
+
 %changelog