adaptations for CMake out-of-tree builds

See: https://fedoraproject.org/wiki/Changes/CMake_to_do_out-of-source_builds

brewtarget.spec

@@ -1,4 +1,5 @@
-# I don't see an obvious way to get a tarball by tag from gitorious, so:
+# force out-of-tree build for spec compatibility with older releases
+%undefine __cmake_in_source_build
 
 Name:		brewtarget
 Version:	2.1.0
@@ -26,12 +27,13 @@ It also can export and import recipes in BeerXML.
 
 %build
 %cmake -DDO_RELEASE_BUILD:BOOL=ON 
-make %{?_smp_mflags} 
-
+%cmake_build
 
 %install
-make VERBOSE=1 INSTALL="install -p" CP="cp -p" DESTDIR=%{buildroot} install
+%cmake_install
 /usr/bin/install -m 0644 -Dp doc/brewtarget.1 %buildroot%{_mandir}/man1/brewtarget.1
+
+%check
 desktop-file-validate %buildroot%{_datadir}/applications/%{name}.desktop
 
 %files