dejagnu: fix target passing for 'runtest' wrapper

The problem was initially noticed in https://sourceware.org/PR30052#c5
where 'runtest' was passing bogus target name when ran without
parameters:

    $ ./result/bin/runtest
    ...
    Target is .runtest-wrapped
    Host   is x86_64-pc-linux-gnu

Note that runtest switches to non-native mode and uses wrapper name as a
target name. Mechanics of it is a bit involved: 'runtest' itself detects
targets passing via ${0} parameter:

    # somewhere in runtest:
    mypath=${0-.}
    ...
    if [ "$target" != runtest ] ; then
        target="--target ${target}"
    else
        target=""
    fi

which would be fine if we ran 'runtest'.

In `nixpkgs` `runtest` is a shell wrapper:

    $ cat /<<NIX>>/dejagnu-1.6.3/bin/runtest
    #! /<<NIX>>/bash-5.2-p15/bin/bash -e
    ...
    exec -a "$0" "/<<NIX>>/dejagnu-1.6.3/bin/.runtest-wrapped"  "$@"

You would expect that `.runtest-wrapped` would get `$0` as an `argv[0]`
here, but no. If both are `bash` scripts `bash` peeks original
`argv[0]` and breaks `runtest`:

    https://lists.gnu.org/archive/html/bug-bash/2023-01/msg00082.html

The workaround here is to drop the wrapper and place `expect` symlink
into a place where `dejagnu` and `runtest` expect it to be without a
wrapper creation.

0 files changed, 0 insertions, 0 deletions