[PATCH] iconvconfig: Fix behaviour with --prefix [BZ #28199]

[Patrick McCarty]

On 2021-08-09 at 11:57:40 +0530, Siddhesh Poyarekar wrote:
> The consolidation of configuration parsing broke behaviour with
> --prefix, where the prefix bled into the modules cache.  Accept a
> prefix which, when non-NULL, is prepended to the path when looking for
> configuration files but only the original directory is added to the
> modules cache.
> 
> This has no effect on the codegen of gconv_conf since it passes NULL.
> 
> Reported-by: Patrick McCarty <patrick.mccarty@intel.com>
> Reported-by: Michael Hudson-Doyle <michael.hudson@canonical.com>
> Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
> ---
>  iconv/gconv_conf.c         |  2 +-
>  iconv/gconv_parseconfdir.h | 21 +++++++++++++++------
>  iconv/iconvconfig.c        | 16 ++++++++++++----
>  3 files changed, 28 insertions(+), 11 deletions(-)

Testing the patch locally, I see that the prefix is now absent from the
modules cache, so this change looks good on my end.

Regards,

-Patrick