libsdl-framework +universal fails to build on 10.6.1

[jhr@…]

Attempting to install libsdl-framework (universal variant) fails on Snow Leopard. The compile errors appear to involve the CDPlayer.c file. Here is a transcript:

<jhr@woton> sudo port install libsdl-framework +universal
--->  Computing dependencies for libsdl-framework
--->  Building libsdl-framework
Error: Target org.macports.build returned: shell command "cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13" && xcodebuild -project "Xcode/SDL/SDL.xcodeproj" -target "Framework Without X11 Stuff (for those who didn't install the X11 headers with Xcode)" -configuration Deployment build OBJROOT=build/ SYMROOT=build/ MACOSX_DEPLOYMENT_TARGET=10.6 ARCHS="x86_64 i386" SDKROOT= ARCHS='x86_64 i386'" returned error 1
Command output: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:264: warning: type-punning to incomplete type might break strict-aliasing rules
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:265: warning: type-punning to incomplete type might break strict-aliasing rules
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c: In function 'ListTrackFiles':
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:349: warning: type-punning to incomplete type might break strict-aliasing rules
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:350: warning: type-punning to incomplete type might break strict-aliasing rules
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c: In function 'CheckInit':
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:554: error: 'kAudioUnitComponentType' undeclared (first use in this function)
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:554: error: (Each undeclared identifier is reported only once
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:554: error: for each function it appears in.)
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:555: error: 'kAudioUnitSubType_Output' undeclared (first use in this function)
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_libsdl-framework/work/SDL-1.2.13/Xcode/SDL/../../src/cdrom/macosx/CDPlayer.c:556: error: 'kAudioUnitID_DefaultOutput' undeclared (first use in this function)
** BUILD FAILED **