I have Ruby 3.2.2, and Sinatra installed. When I tried to install puma, I kept getting the following ERROR message:
Building native extensions. This could take a while...
ERROR: Error installing puma:
ERROR: Failed to build gem native extension.
current directory: /Users/terryzhuang/.rvm/gems/ruby-3.2.2/gems/nio4r-2.5.9/ext/nio4r
/Users/terryzhuang/.rvm/rubies/ruby-3.2.2/bin/ruby extconf.rb
checking for unistd.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/Users/terryzhuang/.rvm/rubies/ruby-3.2.2/bin/$(RUBY_BASE_NAME)
--with-unistd-dir
--without-unistd-dir
--with-unistd-include
--without-unistd-include=${unistd-dir}/include
--with-unistd-lib
--without-unistd-lib=${unistd-dir}/lib
/Users/terryzhuang/.rvm/rubies/ruby-3.2.2/lib/ruby/3.2.0/mkmf.rb:490:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
I followed the instructions step by step, they did not specify any requirement for a development tool. I'm confused about which development tool I will need to help with the installation of puma.