Checking if your kit is complete... Looks good Writing Makefile for Graphics::Plotter cp Plotter.pm blib/lib/Graphics/Plotter.pm AutoSplitting blib/lib/Graphics/Plotter.pm (blib/lib/auto/Graphics/Plotter) /home/cpanrun/build/5.6.1/bin/perl -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp -typemap /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap -typemap typemap Plotter.xs > Plotter.xsc && mv Plotter.xsc Plotter.c Please specify prototyping behavior for Plotter.xs (see perlxs manual) g++ -c -I/usr/local/include -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2 -DVERSION=\"1.0.2\" -DXS_VERSION=\"1.0.2\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE Plotter.c Plotter.xs: In function `void XS_Graphics__Plotter_warning_handler(PerlInterpreter *, CV *)': Plotter.xs:330: `pl_libplotter_warning_handler' undeclared (first use this function) Plotter.xs:330: (Each undeclared identifier is reported only once Plotter.xs:330: for each function it appears in.) Plotter.xs: In function `void XS_Graphics__Plotter_error_handler(PerlInterpreter *, CV *)': Plotter.xs:340: `pl_libplotter_error_handler' undeclared (first use this function) make: *** [Plotter.o] Error 1