Use make macros

https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro

libbytesize.spec

@@ -17,7 +17,7 @@
 
 Name:        libbytesize
 Version:     2.3
-Release:     2%{?dist}
+Release:     3%{?dist}
 Summary:     A library for working with sizes in bytes
 License:     LGPLv2+
 URL:         https://github.com/storaged-project/libbytesize
@@ -75,7 +75,7 @@ for doing calculations with storage sizes.
 
 %build
 %configure %{?configure_opts}
-%{__make} %{?_smp_mflags}
+%make_build
 
 %install
 %{make_install}
@@ -114,6 +114,10 @@ find %{buildroot} -type f -name "*.la" | xargs %{__rm}
 %endif
 
 %changelog
+* Mon Jul 13 2020 Tom Stellard <tstellar@redhat.com> - 2.3-3
+- Use make macros
+- https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro
+
 * Sat May 23 2020 Miro Hrončok <mhroncok@redhat.com> - 2.3-2
 - Rebuilt for Python 3.9