Perl's config says that U32 access must be aligned.
Checking if your kit is complete...
Looks good
Warning: prerequisite Digest::base 1.00 not found.
Writing Makefile for Digest::MD5::M4p
cp M4p.pm blib/lib/Digest/MD5/M4p.pm
/export/home/cpanrun/build/5.8.0/bin/perl /export/home/cpanrun/build/5.8.0/lib/5.8.0/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.8.0/lib/5.8.0/ExtUtils/typemap -typemap typemap  M4p.xs > M4p.xsc && mv M4p.xsc M4p.c
gcc -c   -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\" -fPIC "-I/export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/CORE"  -DU32_ALIGNMENT_REQUIRED M4p.c
Running Mkbootstrap for Digest::MD5::M4p ()
chmod 644 M4p.bs
rm -f blib/arch/auto/Digest/MD5/M4p/M4p.so
LD_RUN_PATH="" gcc  -G M4p.o  -o blib/arch/auto/Digest/MD5/M4p/M4p.so     
chmod 755 blib/arch/auto/Digest/MD5/M4p/M4p.so
cp M4p.bs blib/arch/auto/Digest/MD5/M4p/M4p.bs
chmod 644 blib/arch/auto/Digest/MD5/M4p/M4p.bs
Manifying blib/man3/Digest::MD5::M4p.3
PERL_DL_NONLAZY=1 /export/home/cpanrun/build/5.8.0/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/01_test....ok
All tests successful.
Files=1, Tests=7,  1 wallclock secs ( 0.27 cusr +  0.13 csys =  0.40 CPU)
Installing /export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/auto/Digest/MD5/M4p/M4p.so
Installing /export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/auto/Digest/MD5/M4p/M4p.bs
Installing /export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/Digest/MD5/M4p.pm
Installing /export/home/cpanrun/build/5.8.0/man/man3/Digest::MD5::M4p.3
Appending installation info to /export/home/cpanrun/build/5.8.0/lib/5.8.0/sun4-solaris-thread-multi/perllocal.pod