xar @1.8.0.501_0 - Fails to Build on El Capitan

[RobK88]

xar@1.8.0.501_0 fails to Build on El Capitan.

grinch$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.11.6
BuildVersion:	15G22010

grinch$ port outdated
The following installed ports are outdated:
cmus                           2.11.0_1 < 2.11.0_3       
xar                            1.8.0.498_0 < 1.8.0.501_0  

grinch$ sudo port clean xar
--->  Cleaning xar
 
grinch$ sudo port upgrade xar
--->  Computing dependencies for xar
--->  Fetching archive for xar
--->  Attempting to fetch xar-1.8.0.501_0+universal.darwin_15.i386-x86_64.tbz2 from http://packages.macports.org/xar
--->  Attempting to fetch xar-1.8.0.501_0+universal.darwin_15.i386-x86_64.tbz2 from https://mirrors.mit.edu/macports/packages/xar
--->  Attempting to fetch xar-1.8.0.501_0+universal.darwin_15.i386-x86_64.tbz2 from http://bos.us.packages.macports.org/xar
--->  Fetching distfiles for xar
--->  Verifying checksums for xar
--->  Extracting xar
--->  Applying patches to xar
--->  Configuring xar
--->  Building xar                                       
Error: Failed to build xar: command execution failed     
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_archivers_xar/xar/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

[RobK88]

main.log