Use macros where applicable and drop unecessary rm $RPM_BUILD_ROOT

bison.spec

@@ -16,7 +16,7 @@ BuildRequires: autoconf
 BuildRequires: flex
 BuildRequires: gnupg2
 
-URL: http://www.gnu.org/software/bison/
+URL: http://www.gnu.org/software/%{name}/
 BuildRequires: m4 >= 1.4
 #java-1.7.0-openjdk-devel
 Requires: m4 >= 1.4
@@ -79,21 +79,20 @@ Bison manual section for more information.
 
 %build
 %configure
-make
+%make_build
 
 %check
 make check
 #make maintainer-check
 
 %install
-rm -rf $RPM_BUILD_ROOT
-%makeinstall
+%make_install
 
 # Remove unpackaged files.
-rm -f $RPM_BUILD_ROOT/%{_bindir}/yacc
-rm -f $RPM_BUILD_ROOT/%{_infodir}/dir
-rm -f $RPM_BUILD_ROOT/%{_mandir}/man1/yacc*
-rm -rf $RPM_BUILD_ROOT/%{_docdir}/%{name}/examples/*
+rm -f %{buildroot}/%{_bindir}/yacc
+rm -f %{buildroot}/%{_infodir}/dir
+rm -f %{buildroot}/%{_mandir}/man1/yacc*
+rm -rf %{buildroot}/%{_docdir}/%{name}/examples/*
 
 %find_lang %{name}
 %find_lang %{name}-runtime
@@ -120,7 +119,7 @@ gzip -9nf ${RPM_BUILD_ROOT}%{_infodir}/bison.info*
 %{_libdir}/liby.a
 
 %changelog
-* Sun Jul  5 2020 Dan Čermák <dan.cermak@cgc-instruments.com> - 3.6.4-1
+* Fri Jul 10 2020 Dan Čermák <dan.cermak@cgc-instruments.com> - 3.6.4-1
 - Update to bison 3.6.4 (#1792738, #1847608)
 
 * Tue Jan 28 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.5-2