[gentoo-alt] Re: Gentoo/Cygwin: Vicious Python

[Al]

>
> It's "sometimes", because I am in the DLL hell again. DLLs changing
> addresses each run and Cygwins rebaseall script doesn't fix it this
> time.
>

Again something for the archives and those who are interested:

The reason why rebaseall didn't fix it is, that it only rebases files
that have been installed with setup.exe. It makes use of files in
which the pathes of DLLs are listet. By creating such a list file it
is possible to rebase user contributed DLLs. The file is given with
the -T option of rebaseall.

SOLVED:

Open a windows command shell (cmd):

P:/cygwin/bin/ash
/bin/rebaseall -T /home/prefix/rebase.lst
exit
exit

I create the rebase.lst with this lines:

#/bin/bash
BASE=/home/prefix
rm $BASE/rebase.lst
find $BASE/gentoo/bin/ -name *.dll -o -name *.so >> $BASE/rebase.lst
find $BASE/gentoo/lib/ -name *.dll -o -name *.so >> $BASE/rebase.lst
find $BASE/gentoo/usr/bin -name *.dll -o -name *.so >> $BASE/rebase.lst
find $BASE/gentoo/usr/lib -name *.dll -o -name *.so >> $BASE/rebase.lst

Maybe some more is required if DLLs are outside of this pathes. It is
necessary that all DLLs have write access to change the default
address where they are loaded to.

TODO:

A remaining problem is, that you can't run this script from within
bash, which depends on many DLLs itself. Hence you have to run it from
a very limited ash. This means, you can't include the rebaseall script
into emerge, if you wan't be able to run emerge from bash.

I need to adapt the rebase all script so that it only rebases those
DLLs that are not loaded by bash. It must load them to a completly
different address space. That would base DLLs from Perl and Python for
example.

Remains the issue with the ncurses DLL wich has a bad (low) default
address, but bash depends on it. The best solution is probably to set
it explicitly to a sane address.

Al