Implicit function declarations in configure logs

[hartwork]

Hi!

This QA issue was brought to my attention at https://bugs.gentoo.org/898834:

 * QA Notice: Found the following implicit function declarations in configure logs:
 *   /var/tmp/portage/www-client/httrack-3.49.4-r1/work/httrack-3.49.4/config.log:985 - strcmp
 *   /var/tmp/portage/www-client/httrack-3.49.4-r1/work/httrack-3.49.4/config.log:992 - exit
 *   /var/tmp/portage/www-client/httrack-3.49.4-r1/work/httrack-3.49.4/config.log:1026 - strcmp
 *   /var/tmp/portage/www-client/httrack-3.49.4-r1/work/httrack-3.49.4/config.log:1033 - exit
 * Check that no features were accidentally disabled.
 * See https://wiki.gentoo.org/wiki/Modern_C_porting.

So there is a risk that e.g. with Clang 16 compilation results will not be as intended/expected.
I do not see direct use of strcmp or exit in configure.ac so this is likely from the m4 files that httrack relies upon. Will need a closer look, I want to start with making the issue known.

Best, Sebastian

[xroche]

Fixed in 940bc75