intltool @0.51.0: failed build / configure

[gamato]

With up-to-date MacPorts on up-to-date El Capitan:

[Users/mato] > clean all
...
[Users/mato] > selfupdate                 
--->  Updating MacPorts base sources using rsync
MacPorts base version 2.5.4 installed,
MacPorts base version 2.5.4 downloaded.
--->  Updating the ports tree
--->  MacPorts base is already the latest version

The ports tree has been updated. To upgrade your installed ports, you should run
  port upgrade outdated
[Users/mato] > upgrade outdated
--->  Computing dependencies for intltool
--->  Fetching archive for intltool
--->  Attempting to fetch intltool-0.51.0_5.darwin_15.noarch.tbz2 from https://packages.macports.org/intltool
--->  Attempting to fetch intltool-0.51.0_5.darwin_15.noarch.tbz2 from http://nue.de.packages.macports.org/intltool
--->  Attempting to fetch intltool-0.51.0_5.darwin_15.noarch.tbz2 from http://lil.fr.packages.macports.org/intltool
--->  Fetching distfiles for intltool
--->  Verifying checksums for intltool
--->  Extracting intltool
--->  Applying patches to intltool
--->  Configuring intltool
Error: Failed to configure intltool, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_textproc_intltool/intltool/work/intltool-0.51.0/config.log
Error: Failed to configure intltool: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_textproc_intltool/intltool/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
[Users/mato] > 

[ryandesign (Ryan Carsten Schmidt)]

The log says:

:info:configure dyld: Library not loaded: /opt/local/lib/libreadline.8.dylib
:info:configure   Referenced from: /opt/local/bin/gawk
:info:configure   Reason: image not found
:info:configure ./config.status: line 835: 43520 Done                    eval sed \"\$ac_sed_extra\" "$ac_file_inputs"
:info:configure      43522 Trace/BPT trap: 5       | $AWK -f "$ac_tmp/subs.awk" > $ac_tmp/out

Run sudo port upgrade gawk first.