ERROR: SDL: Prerequisite SDL isn't installed
ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the versions
 of the modules indicated above before proceeding with this installation.

Checking whether your kit is complete...
Looks good
Creating new 'Build' script for 'SDL-OpenGL-Cg' version '0.01'
/export/home/cpanrun/build/5.6.1/bin/perl Build.PL 
/export/home/cpanrun/build/5.6.1/bin/perl Build
Cg.xs:5: ppport.h: No such file or directory
Cg.xs:7: Cg/cg.h: No such file or directory
Cg.xs:8: Cg/cgGL.h: No such file or directory
error building so file from 'lib/SDL/OpenGL/Cg.c' at /export/home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/Module/Build/Base.pm line 1778, <File0000> line 762.
lib/SDL/OpenGL/Cg.pm -> blib/lib/SDL/OpenGL/Cg.pm
lib/SDL/OpenGL/Cg.xs -> lib/SDL/OpenGL/Cg.c
gcc -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE -c -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O -o lib/SDL/OpenGL/Cg.o lib/SDL/OpenGL/Cg.c
make: *** [all] Error 2