doxygen doesn't compile

[ray.j@…]

sudo port -v install doxygen
--->  Building doxygen
/opt/local/bin/gmake -C qtools
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
/opt/local/bin/gmake -f Makefile.qtools    all
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
/opt/local/bin/gmake -C libpng
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
/opt/local/bin/gmake -f Makefile.libpng
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
/opt/local/bin/gmake -C libmd5
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
/opt/local/bin/gmake -f Makefile.libmd5
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
/opt/local/bin/gmake -C src
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
/opt/local/bin/gmake -f Makefile.libdoxycfg PERL=/opt/local/bin/perl all
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
/usr/bin/g++-4.0 -c -pipe -D__FreeBSD__=6 -Wall -W -O2 -I../qtools -o ../objects/portable.o portable.cpp
portable.cpp: In function 'size_t portable_iconv(void*, const char**, size_t*, char**, size_t*)':
portable.cpp:392: error: invalid conversion from 'char**' to 'const char**'
portable.cpp:392: error:   initializing argument 2 of 'size_t libiconv(void*, const char**, size_t*, char**, size_t*)'
gmake[2]: *** [../objects/portable.o] Error 1
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
make: *** [all] Error 2
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1" && make all " returned error 2
Command output: gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/qtools'
/opt/local/bin/gmake -C libpng
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
/opt/local/bin/gmake -f Makefile.libpng
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libpng'
/opt/local/bin/gmake -C libmd5
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
/opt/local/bin/gmake -f Makefile.libmd5
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
gmake[2]: Nothing to be done for `all'.
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/libmd5'
/opt/local/bin/gmake -C src
gmake[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
/opt/local/bin/gmake -f Makefile.libdoxycfg PERL=/opt/local/bin/perl all
gmake[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
/usr/bin/g++-4.0 -c -pipe -D__FreeBSD__=6 -Wall -W -O2 -I../qtools -o ../objects/portable.o portable.cpp
portable.cpp: In function 'size_t portable_iconv(void*, const char**, size_t*, char**, size_t*)':
portable.cpp:392: error: invalid conversion from 'char**' to 'const char**'
portable.cpp:392: error:   initializing argument 2 of 'size_t libiconv(void*, const char**, size_t*, char**, size_t*)'
gmake[2]: *** [../objects/portable.o] Error 1
gmake[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_doxygen/work/doxygen-1.5.7.1/src'
make: *** [all] Error 2

Warning: the following items did not execute (for doxygen): org.macports.activate org.macports.build org.macports.destroot org.macports.install
Error: Status 1 encountered during processing.