Use pkgconfig for BuildRequires

https://fedoraproject.org/wiki/Packaging:PkgConfigBuildRequires

udisks2.spec

@@ -1,9 +1,9 @@
-%define glib2_version                   2.36
-%define gobject_introspection_version   1.30.0
-%define polkit_version                  0.102
-%define systemd_version                 209
-%define libatasmart_version             0.17
-%define dbus_version                    1.4.0
+%global glib2_version                   2.36
+%global gobject_introspection_version   1.30.0
+%global polkit_version                  0.102
+%global systemd_version                 209
+%global libatasmart_version             0.17
+%global dbus_version                    1.4.0
 
 Summary: Disk Manager
 Name: udisks2
@@ -14,16 +14,16 @@ Group: System Environment/Libraries
 URL: http://www.freedesktop.org/wiki/Software/udisks
 Source0: http://udisks.freedesktop.org/releases/udisks-%{version}.tar.bz2
 
-BuildRequires: glib2-devel >= %{glib2_version}
-BuildRequires: gobject-introspection-devel >= %{gobject_introspection_version}
-BuildRequires: polkit-devel >= %{polkit_version}
-BuildRequires: intltool
-BuildRequires: libatasmart-devel >= %{libatasmart_version}
-BuildRequires: libgudev1-devel >= %{systemd_version}
-BuildRequires: gtk-doc
-BuildRequires: systemd-devel
+BuildRequires: pkgconfig(gio-unix-2.0) >= %{glib2_version}
+BuildRequires: pkgconfig(gobject-introspection-1.0) >= %{gobject_introspection_version}
+BuildRequires: pkgconfig(gudev-1.0) >= %{systemd_version}
+BuildRequires: pkgconfig(libatasmart) >= %{libatasmart_version}
+BuildRequires: pkgconfig(libsystemd) >= %{systemd_version}
+BuildRequires: pkgconfig(polkit-gobject-1) >= %{polkit_version}
 BuildRequires: libacl-devel
 BuildRequires: chrpath
+BuildRequires: gtk-doc
+BuildRequires: intltool
 
 # needed to pull in the system bus daemon
 Requires: dbus >= %{dbus_version}
@@ -169,6 +169,7 @@ chrpath --delete $RPM_BUILD_ROOT%{_prefix}/lib/udisks2/udisksd
 - Update to 2.1.5
 - Use license macro for COPYING
 - Update man page globs in file section
+- Use pkgconfig for BuildRequires
 
 * Fri Jan 30 2015 Tomas Bzatek <tbzatek@redhat.com> - 2.1.4-1%{?dist}
 - Update to 2.1.4