source-highlight: autoreconf to update libtool

textproc/source-highlight/Portfile

@@ -25,12 +25,8 @@ master_sites    gnu:src-highlite
 checksums       rmd160  a6e0ad1713deb2056984a97adc7dfd0e6610809f \
                 sha256  01336a7ea1d1ccc374201f7b81ffa94d0aecb33afc7d6903ebf9fbf33a55ada3
 
-# Make sure that the port does not link against system libstdc++.
-# libtool strips unknown flags in link mode, c.f.,
-# https://www.gnu.org/software/libtool/manual/html_node/Stripped-link-flags.html
-if {[string match *clang* ${configure.compiler}]} {
-    configure.ldflags-append    -Wc,-stdlib=${configure.cxx_stdlib}
-}
+# bundled libtool version doesn't recognise -stdlib
+use_autoreconf  yes
 
 configure.args  --infodir=${prefix}/share/info \
                 --mandir=${prefix}/share/man \