bf2c fails to build

[borschel@…]

sudo port install bf2c Password: ---> Computing dependencies for bf2c ---> Fetching bf2c ---> Attempting to fetch bf2c-1.2.3.tar.gz from ​http://superb-west.dl.sourceforge.net/bf2c ---> Verifying checksum(s) for bf2c ---> Extracting bf2c ---> Configuring bf2c ---> Building bf2c Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_bf2c/work/bf2c-1.2.3" && /usr/bin/make -j1 all " returned error 2 Command output: token.h:12: warning: 'class Token' has virtual functions but non-virtual destructor token.h:54: warning: 'class Ptr' has virtual functions but non-virtual destructor token.h:75: warning: 'class Val' has virtual functions but non-virtual destructor token.h:105: warning: 'class Put' has virtual functions but non-virtual destructor token.h:133: warning: 'class Get' has virtual functions but non-virtual destructor token.h:155: warning: 'class Do' has virtual functions but non-virtual destructor token.h:171: warning: 'class Od' has virtual functions but non-virtual destructor token.h:181: warning: 'class Eof' has virtual functions but non-virtual destructor token.h:190: warning: 'class Mulzero' has virtual functions but non-virtual destructor cc1plus: warnings being treated as errors token.h:12: warning: 'class Token' has virtual functions but non-virtual destructor token.h:54: warning: 'class Ptr' has virtual functions but non-virtual destructor token.h:75: warning: 'class Val' has virtual functions but non-virtual destructor token.h:105: warning: 'class Put' has virtual functions but non-virtual destructor token.h:133: warning: 'class Get' has virtual functions but non-virtual destructor token.h:155: warning: 'class Do' has virtual functions but non-virtual destructor token.h:171: warning: 'class Od' has virtual functions but non-virtual destructor token.h:181: warning: 'class Eof' has virtual functions but non-virtual destructor token.h:190: warning: 'class Mulzero' has virtual functions but non-virtual destructor cc1plus: warnings being treated as errors token.h:12: warning: 'class Token' has virtual functions but non-virtual destructor token.h:54: warning: 'class Ptr' has virtual functions but non-virtual destructor token.h:75: warning: 'class Val' has virtual functions but non-virtual destructor token.h:105: warning: 'class Put' has virtual functions but non-virtual destructor token.h:133: warning: 'class Get' has virtual functions but non-virtual destructor token.h:155: warning: 'class Do' has virtual functions but non-virtual destructor token.h:171: warning: 'class Od' has virtual functions but non-virtual destructor token.h:181: warning: 'class Eof' has virtual functions but non-virtual destructor token.h:190: warning: 'class Mulzero' has virtual functions but non-virtual destructor make: * [bf2c] Error 1

Error: Status 1 encountered during processing.