do out-of-src build (prep for qt5 build maybe coming someday)

qwt.spec

@@ -5,7 +5,7 @@
 Name:    qwt
 Summary: Qt Widgets for Technical Applications
 Version: 6.1.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 License: LGPLv2 with exceptions
 URL:     http://qwt.sourceforge.net
@@ -53,13 +53,16 @@ BuildArch: noarch
 %patch51 -p1 -b .qt_install_paths
 
 %build
-%{?_qt4_qmake} QWT_CONFIG+=QwtPkgConfig
+mkdir %{_target_platform}
+pushd %{_target_platform}
+%{_qt4_qmake} QWT_CONFIG+=QwtPkgConfig ..
 
 make %{?_smp_mflags}
+popd
 
 
 %install
-make install INSTALL_ROOT=%{buildroot}
+make install INSTALL_ROOT=%{buildroot} -C %{_target_platform}
 
 # fixup doc path bogosity
 mv %{buildroot}%{_qt4_docdir}/html/html \
@@ -98,6 +101,9 @@ mv %{buildroot}%{_qt4_docdir}/html/man/man3 \
 
 
 %changelog
+* Tue Oct 28 2014 Rex Dieter <rdieter@fedoraproject.org> 6.1.1-2
+- do out-of-src build (prep for qt5 build maybe coming someday)
+
 * Sat Sep 20 2014 Rex Dieter <rdieter@fedoraproject.org> 6.1.1-1
 - qwt-6.1.1