On my Linux server where readline is not being detected, the location of the failure is here:
$conf->cc_gen('config/auto/readline/readline.in'); my $has_readline = 0; eval { $conf->cc_build() }; That 'eval' is generating the error message I quoted in the previous post, which in turn causes the step to result in 'no'. I peered into config/auto/readline/readline.in. I attach it here in its entirety because the comments are so bizarre.
readline.in
Description: Binary data