liblastfm fails to build on Snow Leopard

[sharky@…]

liblastfm fails with the following errors when building on Snow Leopard:

/opt/local/libexec/qt4-mac/include/QtCore/qglobal.h:311:6: warning: #warning "Support for this version of Mac OS X is still preliminary"
/usr/bin/g++-4.2 -c -pipe -fno-operator-names -O2 -arch x86_64 -I/opt/local/include -fvisibility-inlines-hidden -fvisibility=hidden -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -Wall -W -fPIC -DQT_NO_DEBUG -DQT_XML_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I/opt/local/libexec/qt4-mac/mkspecs/macx-g++ -I. -I/opt/local/libexec/qt4-mac/lib/QtCore.framework/Versions/4/Headers -I/opt/local/libexec/qt4-mac/include/QtCore -I/opt/local/libexec/qt4-mac/lib/QtNetwork.framework/Versions/4/Headers -I/opt/local/libexec/qt4-mac/include/QtNetwork -I/opt/local/libexec/qt4-mac/lib/QtXml.framework/Versions/4/Headers -I/opt/local/libexec/qt4-mac/include/QtXml -I/opt/local/libexec/qt4-mac/include -I../_include -I_build -F/opt/local/libexec/qt4-mac/lib -o _build/moc_Audioscrobbler.o _build/moc_Audioscrobbler.cpp
In file included from /opt/local/libexec/qt4-mac/lib/QtCore.framework/Versions/4/Headers/QtGlobal:1,
                 from ../_include/lastfm/global.h:24,
                 from _build/../scrobble/Audioscrobbler.h:23,
                 from _build/moc_Audioscrobbler.cpp:10:
/opt/local/libexec/qt4-mac/lib/QtCore.framework/Versions/4/Headers/qglobal.h:311:6: warning: #warning "Support for this version of Mac OS X is still preliminary"
core/misc.cpp: In function 'QDir dataDotDot()':
core/misc.cpp:69: error: cannot convert 'long int*' to 'SInt32*' for argument '5' to 'OSErr FindFolder(FSVolumeRefNum, OSType, Boolean, FSVolumeRefNum*, SInt32*)'
core/misc.cpp:78: error: '::FSMakeFSSpec' has not been declared
core/misc.cpp:82: error: '::FSpMakeFSRef' has not been declared