ruby - How do I skip creating makefile in extconf.rb

Question

I am writing a gem that depends on utmpx. But I have seen that on my Android's termux environment there's no utmpx. So I want to just skip the makefile creation and show the user warning about the problem.

My extconf looks kind of like this:

require 'mkmf'

unless have_const('linux') || RbConfig::CONFIG['arch'].to_s[/linux/]
    abort('Platform is not linux')
end

unless have_header('utmpx.h') && have_header('ruby.h')
    puts("Your system doesn't have utmpx.h. Sorry but you can't use Login")
else
    create_makefile 'login'
end

But the else block makes the whole gem uninstallable. The command gem install just exists.

How do I check and skip the makefile creation and successfully compile other C modules on OS that missing the header utmpx.h?

question from:https://stackoverflow.com/questions/65906809/how-do-i-skip-creating-makefile-in-extconf-rb

Answer 1

Waitting for answers