+# lustre-ldiskfs.spec
+%{!?version: %define version @VERSION@}
+%{!?kdir: %define kdir %(dir=$(echo "%configure_args" | sed -ne 's/.*--with-linux=\\([^ ][^ ]*\\).*$/\\1/p'); if [ -n "$dir" ]; then echo "$dir"; else echo "/lib/modules/$(uname -r)/build"; fi)}
+
+%{!?kobjdir: %define kobjdir %(dir=$(echo "%configure_args" | sed -ne 's/.*--with-linux-obj=\\([^ ][^ ]*\\).*$/\\1/p'); if [ -n "$dir" ]; then echo "$dir"; else echo "%kdir"; fi)}
+
+# as an alternative to this implementation we could simply "make -C $kdir kernelversion"
+%{!?kversion: %define kversion %(if test -s %kobjdir/include/linux/utsrelease.h ; then LINUXRELEASEHEADER=utsrelease.h; else LINUXRELEASEHEADER=version.h; fi; sed -ne '/^#define UTS_RELEASE/s/.*"\\(.*\\)"$/\\1/p' %kobjdir/include/linux/$LINUXRELEASEHEADER)}
+
+%{!?downstream_release: %define downstream_release "@DOWNSTREAM_RELEASE@"}
+
+%define buildid %(if [ -n "@BUILDID@" ]; then echo "_@BUILDID@"; fi)
+
+%{!?release: %define release %(if [ -n "%downstream_release" ]; then echo -n "%{downstream_release}_"; fi; release=$(echo %kversion | tr '-' '_'); echo ${release})}
+
+# always append the buildid, even when the caller defines %release
+%define fullrelease %{release}%{buildid}