Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lproject
Note (probably harmless): No library found for -lgen
Writing Makefile for Sun::Solaris::Project
cp Project.pm blib/lib/Sun/Solaris/Project.pm
/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 Project.xs > Project.xsc && mv Project.xsc Project.c
gcc -c  -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"1.5\" -DXS_VERSION=\"1.5\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/CORE  Project.c
Project.xs:12: project.h: No such file or directory
make: *** [Project.o] Error 1