[CRIU] Building PIE/PIC objects separately

[Cyrill Gorcunov]

On Wed, Oct 07, 2015 at 04:27:53PM +0200, Laurent Dufour wrote:
> > 
> > Hi! You know the former idea was exactly the opposite ;) We
> > wanted to build them once and reuse it. Could you please
> > point which exactly problems you're facing?
> 
> Actually, I didn't face any issue, I had one with the memcpy symbol, but
> I was able to resolve it in another way.
> 
> My concern is that we are linking together objects which are not built
> the same way between crtools and parasite/restorer.

True. But pie/ code is built that way it can be linked into non PIE
code (but sure not the reverse).

> 
> In addition building parasite/restorer objects separately, will remove
> the need to pull architecture memcmp/cpy and bit operation for crtools
> binaries. This way crtools will fully rely on the C library ones which
> are updated and may be more efficient.
> 
> May be it's fine to live with that, but this should not impact so much
> the build time to build twice the 3 files below :)

You know, personally I won't mind if we build pie as a serapate
but this will require either symlinks for the files (easy way)
or hard lifting of the make engine (hard way). At moment I fear
I don't have time for the second. So if you can experiment with
our make -- this would be just great.

Also, iirc Pavel has not be voting for two builds so we need to
hear his opinion first. Pavel?