Use make macros

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

grep.spec

@@ -1,7 +1,7 @@
 Summary: Pattern matching utilities
 Name: grep
 Version: 3.4
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: GPLv3+
 URL: http://www.gnu.org/software/grep/
 
@@ -50,10 +50,10 @@ GNU grep is needed by many scripts, so it shall be installed on every system.
 
 %configure --without-included-regex --disable-silent-rules \
   CPPFLAGS="-I%{_includedir}/pcre" CFLAGS="%{BUILD_FLAGS}"
-make %{?_smp_mflags}
+%make_build
 
 %install
-make %{?_smp_mflags} DESTDIR=$RPM_BUILD_ROOT install
+%make_install %{?_smp_mflags}
 gzip $RPM_BUILD_ROOT%{_infodir}/grep*
 rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 mkdir -p $RPM_BUILD_ROOT%{_sysconfdir}/profile.d
@@ -79,6 +79,10 @@ make check
 %{_libexecdir}/grepconf.sh
 
 %changelog
+* Mon Jul 13 2020 Tom Stellard <tstellar@redhat.com> - 3.4-2
+- Use make macros
+- https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro
+
 * Wed Apr  1 2020 Jaroslav Škarvada <jskarvad@redhat.com> - 3.4-1
 - New version
   Resolves: rhbz#1818417