Use make macros

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

libevent.spec

@@ -2,7 +2,7 @@
 
 Name:           libevent
 Version:        2.1.8
-Release:        8%{?dist}
+Release:        9%{?dist}
 Summary:        Abstract asynchronous event notification library
 
 # arc4random.c, which is used in build, is ISC. The rest is BSD.
@@ -61,7 +61,7 @@ pathfix.py -i %{__python3} -pn test/check-dumpevents.py \
 %build
 %configure \
     --disable-dependency-tracking --disable-static
-make %{?_smp_mflags} all
+%make_build all
 
 %if ! 0%{?_module_build}
 # Create the docs
@@ -69,7 +69,7 @@ make doxygen
 %endif
 
 %install
-make DESTDIR=$RPM_BUILD_ROOT install
+%make_install
 rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 
 # Fix multilib install of devel (bug #477685)
@@ -138,6 +138,10 @@ mkdir -p $RPM_BUILD_ROOT/%{develdocdir}/sample
 %doc %{develdocdir}/
 
 %changelog
+* Mon Jul 13 2020 Tom Stellard <tstellar@redhat.com> - 2.1.8-9
+- Use make macros
+- https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 2.1.8-8
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild