About new default configure-{c(pp|xx)?,ld}flags

[Paul Guyot]

>> The plan is to do it with library injection,
>
> I'm not sure what this means..? The above paths would be made  
> available to the chroot environment... by hard links? or how? And  
> how do you make those certain areas read-only?

Library injection means that open(2), write(2) and so on are patched  
with our own versions and that's how we trick the ports, by returning  
ENOENT, EACCES, etc. On darwin, the technique consists in setting  
DYLD_INSERT_LIBRARIES and DYLD_FORCE_FLAT_NAMESPACE.

Paul