at compile time. The default used to be 16 bytes, which is appropriate
for the 68040/68060 but not for the PowerPC, which uses 32 or 128
bytes per cache line.
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@14787 87f5fb63-7c3d-0410-a384-fd976d0f7a62