[csw-devel] SF.net SVN: gar:[16750] csw/mgar/pkg/gcc4/branches/private-lib/

[Maciej (Matchek) Bliziński]

2012/1/12 Peter FELECAN <pfelecan at opencsw.org>:
> What's the idea?

The idea is this: if libstdc++.so.6 is in /opt/csw/lib and we
automatically add -R/opt/csw/lib/$ISALIST to all binaries, there's a
new failure mode: a binary might link against a SONAME traditionally
from /usr/lib. If / when we introduce the an incompatible library with
the same SONAME to /opt/csw/lib, we break that binary.

State 1:

/opt/csw/bin/foo NEEDED libbar.so.1, RPATH /opt/csw/lib
/usr/lib/libbar.so.1 is available

State 2:

/opt/csw/bin/foo NEEDED libbar.so.1, RPATH /opt/csw/lib
/usr/lib/libbar.so.1 is available
/opt/csw/lib/libbar.so.1 is available too, incompatible with /opt/csw/bin/foo

I'm not sure if this is a scenario we have to worry about, because the
solution is to keep GCC libraries in a subdirectory, which has its own
disadvantages - library space fragmentation, sometimes harder to debug
linking problems, etc.

Maciej