https://bz.apache.org/bugzilla/show_bug.cgi?id=66000

--- Comment #4 from Mike Jetzer <[email protected]> ---
This issue persists to httpd 2.5.67.

Looking at the generated configure script (I don't know autoconfig), I see that
it successfully locates pcre2-config using "$as_dir$ac_word$ac_exec_ext", and
prints that it has found "$as_dir$ac_word$ac_exec_ext" to the config.log.

It eventually sets
    ac_cv_prog_ac_ct_PCRE_CONFIG="$ac_prog"
and then
    ac_ct_PCRE_CONFIG=$ac_cv_prog_ac_ct_PCRE_CONFIG
and finally
    PCRE_CONFIG=$ac_ct_PCRE_CONFIG

The failure exists because it attempts to invoke "$PCRE_CONFIG --version", but
fails, because the $ac_prog in the first assignment statement above is simply
"pcre2-config", rather than the full path to the script, and that directory is
not in PATH.

If I hack configure to set ac_cv_prog_ac_ct_PCRE_CONFIG to
"$as_dir$ac_word$ac_exec_ext" instead of "$ac_prog", then configure is able to
successfully use pcre2-config.

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