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[ 37%] Built target copy_skater_data
[ 37%] Generating ../../examples/data/testing.ogg
[ 37%] Generating ../../examples/data/mysha.tga
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[ 49%] Built target copy_skater_example_data
Linking CXX executable skater
CMakeFiles/skater.dir/src/global.c.o: In function `allegro_message':
/home/allefant/allegro/git/demos/skater/src/global.c:454: undefined reference to `al_show_native_message_box'
collect2: ld returned 1 exit status
make[2]: *** [demos/skater/skater] Error 1
make[1]: *** [demos/skater/CMakeFiles/skater.dir/all] Error 2
make: *** [all] Error 2