Checking if your kit is complete... Looks good Writing Makefile for Mac::CoreMIDI cp lib/Mac/CoreMIDI/Entity.pm blib/lib/Mac/CoreMIDI/Entity.pm cp lib/Mac/CoreMIDI/Object.pm blib/lib/Mac/CoreMIDI/Object.pm cp lib/Mac/CoreMIDI/Port.pm blib/lib/Mac/CoreMIDI/Port.pm cp lib/Mac/CoreMIDI/Endpoint.pm blib/lib/Mac/CoreMIDI/Endpoint.pm cp lib/Mac/CoreMIDI/Client.pm blib/lib/Mac/CoreMIDI/Client.pm cp lib/Mac/CoreMIDI/Device.pm blib/lib/Mac/CoreMIDI/Device.pm cp lib/Mac/CoreMIDI.pm blib/lib/Mac/CoreMIDI.pm /export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap CoreMIDI.xs > CoreMIDI.xsc && mv CoreMIDI.xsc CoreMIDI.c Please specify prototyping behavior for CoreMIDI.xs (see perlxs manual) gcc -c -I. -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O -DVERSION=\"0.04\" -DXS_VERSION=\"0.04\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE CoreMIDI.c In file included from CoreMIDI.xs:1: helpers.h:15: CoreMIDI/CoreMIDI.h: No such file or directory helpers.h:16: CoreFoundation/CFRunLoop.h: No such file or directory make: *** [CoreMIDI.o] Error 1