[ccache] problems with buildworld & gcc45 on ports

[Beeblebrox]

An update to my previous e-mail:

I just re-built world, and the problem described in item 5 of my previous
mail did not occur.
Unfortunately, ccache was not called at all either although I had below
setting in my make.conf.
-----------------------------------------------------------
CC=  /usr/local/libexec/ccache/world/cc
CXX= /usr/local/libexec/ccache/world/c++
------------------------------------------------------------
So problem #6 in my previous mail is not caused by the settings.

I suspect that the reason for this is that this time I re-built
devel/libtool using gcc45, when previously I had re-built libtool using
gcc42.   At this point the culprit for some of the prolems seems to be
libtool.  If so, any advice on how and whether if the issue can be corrected
is appreciated.