[...]
cc -xcode=pic32 -DNDEBUG -O -DHAVE_SEM_TIMEDWAIT=0 -
IModules/_multiprocessing -I. -I./Include -IInclude -
I/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-solaris8-
sparc-apy27-rrun/python -c /export/home/apy/rrun/build/activepython-
DEV/build/py2_7a1-solaris8-sparc-apy27-
rrun/python/Modules/_multiprocessing/semaphore.c -o build/temp.solaris-
2.8-sun4u-2.7/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-
solaris8-sparc-apy27-rrun/python/Modules/_multiprocessing/semaphore.o
"/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-solaris8-
sparc-apy27-rrun/python/Modules/_multiprocessing/semaphore.c", line 318: 
warning: implicit function declaration: sem_timedwait
cc -G build/temp.solaris-2.8-sun4u-
2.7/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-solaris8-
sparc-apy27-rrun/python/Modules/_multiprocessing/multiprocessing.o 
build/temp.solaris-2.8-sun4u-
2.7/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-solaris8-
sparc-apy27-rrun/python/Modules/_multiprocessing/socket_connection.o 
build/temp.solaris-2.8-sun4u-
2.7/export/home/apy/rrun/build/activepython-DEV/build/py2_7a1-solaris8-
sparc-apy27-rrun/python/Modules/_multiprocessing/semaphore.o -o 
build/lib.solaris-2.8-sun4u-2.7/_multiprocessing.so
*** WARNING: renaming "_multiprocessing" since importing it failed: 
ld.so.1: python: fatal: relocation error: file build/lib.solaris-2.8-
sun4u-2.7/_multiprocessing.so: symbol sem_timedwait: referenced symbol 
not found

$ uname -a
SunOS nail 5.8 Generic_117350-55 sun4u sparc SUNW,Sun-Fire-280R