Use make macros

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

libtiff.spec

@@ -1,7 +1,7 @@
 Summary:       Library of functions for manipulating TIFF format image files
 Name:          libtiff
 Version:       4.1.0
-Release:       2%{?dist}
+Release:       3%{?dist}
 License:       libtiff
 URL:           http://www.simplesystems.org/libtiff/
 
@@ -72,10 +72,10 @@ autoheader
 %build
 export CFLAGS="%{optflags} -fno-strict-aliasing"
 %configure --enable-ld-version-script
-make %{?_smp_mflags}
+%make_build
 
 %install
-make DESTDIR=$RPM_BUILD_ROOT install
+%make_install
 
 # remove what we didn't want installed
 rm $RPM_BUILD_ROOT%{_libdir}/*.la
@@ -163,6 +163,10 @@ find html -name 'Makefile*' | xargs rm
 %{_mandir}/man1/*
 
 %changelog
+* Mon Jul 13 2020 Tom Stellard <tstellar@redhat.com> - 4.1.0-3
+- Use make macros
+- https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 4.1.0-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild