diff -urpa rpm-4.5.orig/configure.ac rpm-4.5/configure.ac
--- rpm-4.5.orig/configure.ac	2011-10-03 01:50:17.000000000 +0000
+++ rpm-4.5/configure.ac	2018-02-22 12:42:35.749384821 +0000
@@ -291,6 +291,7 @@ AC_PATH_PROG(__PHP, php, %{_bindir}/php,
 AC_PATH_PROG(__PYTHON, python, %{_bindir}/python, $MYPATH)
 AC_PATH_PROG(__RM, rm, /bin/rm, $MYPATH)
 AC_PATH_PROG(__RSH, rsh, %{_bindir}/rsh, $MYPATH)
+AC_PATH_PROG(__RUBY, ruby, %{_bindir}/ruby, $MYPATH)
 AC_PATH_PROG(__SED, sed, /bin/sed, $MYPATH)
 AC_PATH_PROG(__SH, sh, /bin/sh, $MYPATH)
 AC_PATH_PROG(__SSH, ssh, %{_bindir}/ssh, $MYPATH)
diff -urpa rpm-4.5.orig/macros.in rpm-4.5/macros.in
--- rpm-4.5.orig/macros.in	2008-06-10 22:00:43.000000000 +0000
+++ rpm-4.5/macros.in	2018-02-22 13:53:01.843337239 +0000
@@ -78,6 +78,7 @@
 %__python		@__PYTHON@
 %__rm			@__RM@
 %__rsh			@__RSH@
+%__ruby			@__RUBY@
 %__sed			@__SED@
 %__sh			@__SH@
 %__ssh			@__SSH@
@@ -1421,6 +1422,44 @@ PreReq: python >= %{python_version}, pyt
 #%__java_requires	%{_rpmhome}/javadeps.sh --requires
 
 #------------------------------------------------------------------------
+# ruby(...) configuration.
+#
+# Path to scripts to autogenerate ruby package dependencies,
+
+# Note: Used if _use_internal_dependency_generator is non-zero. The
+# helpers are also used by %{_rpmhome}/rpmdeps {--provides|--requires}.
+%__ruby_provides	%{_rpmhome}/rubygems.rb --provides
+%__ruby_requires	%{_rpmhome}/rubygems.rb --requires
+
+%ruby_version		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["ruby_version"]')
+
+%ruby_archdir		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["archdir"]')
+%ruby_libdir		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["rubylibdir"]')
+%ruby_sitedir		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["sitedir"]')
+%ruby_sitearchdir	%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["sitearchdir"]')
+%ruby_sitelibdir	%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["sitelibdir"]')
+%ruby_vendordir		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["vendordir"]')
+%ruby_vendorarchdir	%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["vendorarchdir"]')
+%ruby_vendorlibdir	%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["vendorlibdir"]')
+%ruby_gemdir		%(%{__ruby} -rrbconfig -e 'print RbConfig::CONFIG["rubylibdir"].sub(RbConfig::CONFIG["ruby_version"], "gems/#{RbConfig::CONFIG["ruby_version"]}")')
+%ruby_ridir		%(%{__ruby} -rrbconfig -e 'print File.join(RbConfig::CONFIG["datadir"], "ri", RbConfig::CONFIG["ruby_version"])')
+
+%__gem_helper %{_usrlibrpm}/gem_helper.rb
+
+%gem_build(f:j:) \
+	%__gem_helper build \\\
+	%{-f:-f%{-f*}} \\\
+	%{!-j:%{_smp_mflags}}%{-j:-j%{-j*}}
+
+%gem_install(i:n:C) \
+	DESTDIR=${DESTDIR:-%{buildroot}} \\\
+	%__gem_helper install \\\
+	--env-shebang --rdoc --ri --force --ignore-dependencies \\\
+	%{!-i:--install-dir %{buildroot}%{ruby_gemdir}}%{-i:--install-dir %{-i*}} \\\
+	%{!-n:--bindir %{buildroot}%{_bindir}}%{-n:--bindir%{-n*}} \\\
+	%{!-C:--fix-permissions}
+
+#------------------------------------------------------------------------
 # libtool(...) configuration.
 #
 # Path to scripts to autogenerate libtool package dependencies,
diff -urpa rpm-4.5.orig/scripts/Makefile.am rpm-4.5/scripts/Makefile.am
--- rpm-4.5.orig/scripts/Makefile.am	2008-05-21 20:48:02.000000000 +0000
+++ rpm-4.5/scripts/Makefile.am	2018-02-22 13:55:18.773335698 +0000
@@ -19,7 +19,8 @@ EXTRA_DIST = \
 	sql.prov sql.req symclash.py symclash.sh tcl.req tgpg trpm u_pkg.sh \
 	vpkg-provides.sh vpkg-provides2.sh \
 	macros.perl* macros.python* \
-	macros.php* find-*.php find-php-*
+	macros.php* find-*.php find-php-* \
+	gem_helper.rb rubygems.rb
 
 installprefix = $(DESTDIR)
 
@@ -43,4 +44,5 @@ versionlib_SCRIPTS = \
 	rpmdb_loadcvt \
 	rpm.daily rpm.log rpm.xinetd \
 	symclash.py symclash.sh tgpg u_pkg.sh \
-	vpkg-provides.sh vpkg-provides2.sh
+	vpkg-provides.sh vpkg-provides2.sh \
+	gem_helper.rb rubygems.rb