On Wednesday 2025-08-27 14:57, Pablo Neira Ayuso wrote:
>On Wed, Aug 27, 2025 at 02:43:07PM +0200, Jan Engelhardt wrote:
>> `make distcheck` has an expectation that, if only --prefix is
>> specified, all other potentially-configurable paths are somehow
>> relative to '${prefix}', e.g. bindir defaults to '${prefix}/bin'.
>>
>> We get an absolute path from $(pkg-config systemd ...) at all times
>> in case systemd.pc is present, and an empty path in case it is not,
>> which collides with the aforementioned expectation two ways. Add an
>> internal --with-dcprefix configure option for the sake of distcheck.
>
>Subtle internal detail is exposed:
>
>nft configuration:
> cli support: editline
> enable debugging symbols: yes
> use mini-gmp: no
> enable man page: yes
> libxtables support: no
> json output support: no
> systemd unit: ${dcprefix}/lib/systemd/system
> ^---------^
That is unavoidable. Variables with paths are expected to be recursively
expanded -- make will do that, sh won't.
And that is why you will see '${var}' when directly echoing from configure.ac.
This is nothing specific to ${dcprefix}, you will also observe this when doing
something as trivial as
# configure.ac
echo "bindir: ${bindir}"
AC_OUTPUT
