My new work is to manage solaris 10 on sparc machines, and i'm newbie in solaris.

here's some hints on packages, how to compile something if you installed Solaris in minimal CORE package configuration:

needed :
SUNWbtool for ar , SUNWsprot for make , add /usr/ccs/bin to PATH
SUNWhea for std headers (stdio.h, etc...)
Sun Studio 1x for CC compiler , add /opt/SUNWspro/bin to PATH, vim in /opt/SUNWspro/contrib/
recomended :
SUNWtoo (various programming tools, i.e. ldd/ctags/strings/truss)

PS: My sandbox is netra-120 sparc machine, and 'prtdiag -v' doesn't show temperature measurements, so another way to get it is to use hardware LOM -> http://www.sun.com/download/products.xml?id=41f5f9b1
To use LOM commands you must install the Lights Out Management 2.0 packages (SUNWlomu, SUNWlomr and SUNWlomm) from the Solaris Supplementary CD.

bash-3.00# lom -t
System Temperature Sensors:
 1        Enclosure 34 degC : warning 67 degC : shutdown 72 degC
System Over-temperature Sensors:
 1              CPU status=ok