1st attempt building Shoes on OSX PPC

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Last 20 lines...
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./shoes/native.h:22: warning: function declaration isn’t a prototype
./shoes/native.h:24: warning: function declaration isn’t a prototype
./shoes/native.h:40: warning: function declaration isn’t a prototype
shoes/http/nsurl.m: In function ‘-[ShoesHttp readHeaders:]’:
shoes/http/nsurl.m:114: warning: assignment discards qualifiers from pointer target type
shoes/http/nsurl.m:116: warning: assignment discards qualifiers from pointer target type
shoes/http/nsurl.m: In function ‘-[ShoesHttp connectionDidFinishLoading:]’:
shoes/http/nsurl.m:176: warning: statement with no effect
shoes/http/nsurl.m:176: warning: statement with no effect
shoes/http/nsurl.m: In function ‘-[ShoesHttp downloadDidFinish:]’:
shoes/http/nsurl.m:222: warning: statement with no effect
shoes/http/nsurl.m:222: warning: statement with no effect
shoes/http/nsurl.m: In function ‘shoes_http_err’:
shoes/http/nsurl.m:246: warning: initialization discards qualifiers from pointer target type
ld: library not found for -lungif
collect2: ld returned 1 exit status
rake aborted!
Command failed with status (1): [gcc -o dist/libshoes.dylib shoes/app.o sho...]
/Users/me/code/github/shoes/rakefile:453:in `block in <top (required)>'
(See full trace by running task with --trace)

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Output when running with --trace around error 
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shoes/http/nsurl.m:246: warning: initialization discards qualifiers from pointer target type
** Execute dist/libshoes.dylib
gcc -o dist/libshoes.dylib shoes/app.o shoes/canvas.o shoes/effects.o shoes/image.o shoes/internal.o shoes/ruby.o shoes/world.o shoes/native/cocoa.o shoes/http/nsurl.o -framework Cocoa -framework Carbon -dynamiclib -Wl,-single_module -L.  -install_name @executable_path/libshoes.dylib -lruby -lpng -lcairo -lpangocairo-1.0 -lungif -lpixman-1 -ljpeg.62 -L/Users/me/code/github/shoes/deps/lib -dylib_file /tmp/dep/lib/libpng12.0.dylib:./deps/lib/libpng12.0.dylib -L./deps/lib -lcairo -L./deps/lib -lpango-1.0 -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -lintl -liconv
ld: library not found for -lungif
collect2: ld returned 1 exit status
rake aborted!
Command failed with status (1): [gcc -o dist/libshoes.dylib shoes/app.o sho...]
/Users/me/code/github/shoes/deps/lib/ruby/1.9.1/rake.rb:968:in `block in sh'