MacPorts installed "libiconv @1.14_0+universal" as a dependency on my system. This happens to be a 32-bit flavor and it started causing issue when I tried to compile a voice recognition software called Simon Listens. While googling I found out that that Mac actually ships with a 64-bit flavor of libiconv by default and I was able to locate the said files on my system:
$ find /usr/lib -name libiconv*
/usr/lib/libiconv.2.4.0.dylib
/usr/lib/libiconv.2.dylib
/usr/lib/libiconv.dylib
In order to use the system library, the quickest way I could think of was to uninstall MacPort's version of libiconv so that the system's library would end up getting selected as a fallback as it has to present (my guess) somewhere downstairs on the PATH already.
But that failed due to dependecies:
$ sudo port uninstall libiconv @1.14_0+universal
Unable to uninstall libiconv @1.14_0+universal, the following ports depend on it:
...
So now my question is how can I tell MacPort to replace its dependency graph to point to and use the library already on my system?
Another approach to avoid MacPorts libiconv issues would be to build simon against a fresh MacPorts system plus the necessary packages such as cyrus-sasl2, zlib, portaudio and kdesdk4 in a custom location, e. g. /opt/macports-simon.
The following code worked for me on my machine running Mac OS X 10.6.8:
# compile simon on Mac OS X 10.6.8 using MacPorts for the installation of zlib, portaudio and kdesdk4
# http://www.simon-listens.org
# http://sourceforge.net/projects/speech2text/
# get a root shell
sudo -H -i
# prevent idle sleep
pmset -a force sleep 0 displaysleep 0 disksleep 0
mv -i /opt/local /opt/local-off
mv -i /usr/local /usr/local-off
cd /tmp
mkdir buildsimon || exit 1
cd buildsimon || exit 1
# create custom /opt/macports-simon to install zlib, portaudio and kdesdk4
# cf. http://guide.macports.org/#installing.macports.source.multiple
MP_PREFIX='/opt/macports-simon'
unset PATH
export PATH='/bin:/sbin:/usr/bin:/usr/sbin'
curl -L -O https://distfiles.macports.org/MacPorts/MacPorts-2.0.4.tar.bz2
tar -xjf MacPorts-2.0.4.tar.bz2
cd MacPorts-2.0.4 || exit 1
./configure --prefix="${MP_PREFIX}" --with-applications-dir="${MP_PREFIX}/Applications"
make
make install
cd /tmp/buildsimon
unset PATH
export PATH="${MP_PREFIX}/bin:/bin:/sbin:/usr/bin:/usr/sbin"
# get the Portfiles and update the system
port -v selfupdate
# install cyrus-sasl2
port -f uninstall cyrus-sasl2
port clean --all cyrus-sasl2
port extract cyrus-sasl2
cd "$(port dir cyrus-sasl2)"/work/cyrus-sasl-2.1.23
printf '%s\n' H '/\(darwin\[15\]\)/s//\1./g' wq | sudo ed -s config/ltconfig
printf '%s\n' H '/\(darwin\[15\]\)/s//\1./g' wq | sudo ed -s saslauthd/config/ltconfig
cd /tmp/buildsimon
port -f -s install cyrus-sasl2
otool -L /opt/macports-simon/lib/libsasl2.dylib
port -f install zlib
port -f install portaudio
port -f install kdesdk4
port installed zlib portaudio kdesdk4 cyrus-sasl2
# enable dbus with launchd
# http://www.freedesktop.org/wiki/Software/dbus
# open -e dbus-1.5.8/README.launchd
launchctl load -w /Library/LaunchDaemons/org.freedesktop.dbus-system.plist
launchctl load -w /Library/LaunchAgents/org.freedesktop.dbus-session.plist
sudo -u _mysql mysql_install_db5
sudo port load mysql5-server
# todo: how to configure simon to use /opt/macports-simon directly?
ln -isv "${MP_PREFIX}" /usr/local
cd /tmp/buildsimon
# http://sourceforge.net/projects/speech2text/
curl -L -O http://netcologne.dl.sourceforge.net/project/speech2text/simon/0.3.0/simon-0.3.0.tar.bz2
tar -xjf simon-0.3.0.tar.bz2
cd simon-0.3.0 || exit 1
# Note that /usr/local got symlinked to "${MP_PREFIX}" above!
unset PATH
export PATH='/usr/local/bin:/bin:/sbin:/usr/bin:/usr/sbin'
# the following commands are taken from simon-0.3.0/build.sh
mkdir build 2> /dev/null
cd build || exit 1
cmake -DCMAKE_INSTALL_PREFIX=`kde4-config --prefix` ..
# append ${MP_PREFIX}/lib/libiconv.dylib to gcc command in link.txt file
printf '%s\n' H '/\/usr\/bin\/gcc/s|\(.*\)|\1 '"${MP_PREFIX}"'/lib/libiconv.dylib|' wq |
ed -s julius/julius/CMakeFiles/juliusexe.dir/link.txt
# replace gcc option ' -bundle ' with ' -dynamiclib '
egrep -Ilsr -Z -e ' -bundle ' . |
xargs -0 -n 1 /bin/sh -c 'printf "%s\n" H "g/ -bundle /s// -dynamiclib /g" wq | /bin/ed -s "${1}"' argv0
make
touch ./julius/gramtools/mkdfa/mkfa-1.44-flex/*
make
make install
# ldconfig # not needed on Mac OS X
kbuildsycoca4
echo -e "**** Build completed ****\n\nThe executable file \"simon\" is now ready and has been installed.\n\nIssue \"simon\" to start it."
unset PATH
export PATH="${MP_PREFIX}/bin:/bin:/sbin:/usr/bin:/usr/sbin"
otool -L "${MP_PREFIX}/bin/simon"
simon
mv -i /opt/local-off /opt/local
mv -i /usr/local-off /usr/local