Support Mac M1 about thin

[dentarg]

@vbisbest Please to debug your issue further and at least include logs when reporting an issue.

Installing thin on Apple Silicon works for me:

arm64 $ uname -srm
Darwin 21.6.0 arm64

arm64 $ gem install --verbose thin
HEAD https://index.rubygems.org/
200 OK
GET https://index.rubygems.org/info/thin
200 OK
GET https://index.rubygems.org/quick/Marshal.4.8/thin-1.8.1.gemspec.rz
200 OK
GET https://index.rubygems.org/info/daemons
200 OK
GET https://index.rubygems.org/info/eventmachine
200 OK
GET https://index.rubygems.org/info/rack
200 OK
GET https://index.rubygems.org/quick/Marshal.4.8/daemons-1.4.1.gemspec.rz
200 OK
Downloading gem thin-1.8.1.gem
Downloading gem daemons-1.4.1.gem
GET https://index.rubygems.org/gems/thin-1.8.1.gem
Fetching thin-1.8.1.gem
200 OK
GET https://index.rubygems.org/gems/daemons-1.4.1.gem
Fetching daemons-1.4.1.gem
200 OK
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/LICENSE
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/README.md
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/Releases
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/call/call.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/call/call_monitor.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/daemonize/daemonize.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_crash.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_custom_logfiles.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_exec.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_exit.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_hanging.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_keep_pid_files.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_monitor.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_monitor_multiple.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_monitor_nocrash.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_multiple.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_normal.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_ontop.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_optionparser.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_proc.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_proc_multiple.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_proc_rand.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_proc_simple.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/ctrl_slowstop.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/myserver.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/myserver_crashing.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/myserver_exiting.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/myserver_hanging.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/examples/run/myserver_slowstop.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/application.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/application_group.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/change_privilege.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/cmdline.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/controller.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/daemonize.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/etc_extension.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/exceptions.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/monitor.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/pid.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/pidfile.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/pidmem.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/reporter.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/syslogio.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/daemons-1.4.1/lib/daemons/version.rb
Successfully installed daemons-1.4.1
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/CHANGELOG
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/README.md
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/Rakefile
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/bin/thin
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/adapter.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/async_app.ru
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/async_chat.ru
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/async_tailer.ru
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/config.ru
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/monit_sockets
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/monit_unixsock
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/myapp.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/ramaze.ru
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/thin.god
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/thin_solaris_smf.erb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/thin_solaris_smf.readme.txt
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/example/vlad.rake
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/common.rl
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/ext_help.h
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/extconf.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/parser.c
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/parser.h
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/parser.rl
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser/thin.c
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/rack/adapter/loader.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/rack/adapter/rails.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/rack/handler/thin.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/backends/base.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/backends/swiftiply_client.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/backends/tcp_server.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/backends/unix_server.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/command.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/connection.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/controllers/cluster.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/controllers/controller.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/controllers/service.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/controllers/service.sh.erb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/daemonizing.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/headers.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/logging.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/request.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/response.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/runner.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/server.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/stats.html.erb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/stats.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/statuses.rb
/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/lib/thin/version.rb
Building native extensions. This could take a while...
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
["/Users/dentarg/.arm64_rubies/3.1.2/bin/ruby", "-I", "/Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/site_ruby/3.1.0", "extconf.rb"]
checking for main() in -lc... yes
creating Makefile
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
["make", "DESTDIR=", "sitearchdir=./.gem.20230105-55073-ztmb9t", "sitelibdir=./.gem.20230105-55073-ztmb9t", "clean"]

current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
["make", "DESTDIR=", "sitearchdir=./.gem.20230105-55073-ztmb9t", "sitelibdir=./.gem.20230105-55073-ztmb9t"]
compiling parser.c
parser.c:31:18: warning: unused variable 'http_parser_en_main' [-Wunused-const-variable]
static const int http_parser_en_main = 1;
                 ^
1 warning generated.
compiling thin.c
linking shared-object thin_parser.bundle
ld: warning: -undefined dynamic_lookup may not work with chained fixups
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
["make", "DESTDIR=", "sitearchdir=./.gem.20230105-55073-ztmb9t", "sitelibdir=./.gem.20230105-55073-ztmb9t", "install"]
/usr/bin/install -c -m 0755 thin_parser.bundle ./.gem.20230105-55073-ztmb9t
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
/Users/dentarg/.arm64_rubies/3.1.2/bin/ruby -I /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/site_ruby/3.1.0 extconf.rb
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20230105-55073-ztmb9t sitelibdir\=./.gem.20230105-55073-ztmb9t clean
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20230105-55073-ztmb9t sitelibdir\=./.gem.20230105-55073-ztmb9t
current directory: /Users/dentarg/.arm64_rubies/3.1.2/lib/ruby/gems/3.1.0/gems/thin-1.8.1/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20230105-55073-ztmb9t sitelibdir\=./.gem.20230105-55073-ztmb9t install
/Users/dentarg/.arm64_rubies/3.1.2/bin/thin
Successfully installed thin-1.8.1
2 gems installed

arm64 $ gem list thin

*** LOCAL GEMS ***

thin (1.8.1)

[the-codetrane]

thin 1.8.* seems to install for me too on an M3.

thin 1.6 however does not:

Fetching gem metadata from https://rubygems.org/..........
Resolving dependencies...
Installing thin 1.6.2 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
/Users/michaelmcain/.asdf/installs/ruby/3.3.0/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile

current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20240304-11192-lahg8b sitelibdir\=./.gem.20240304-11192-lahg8b clean

current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20240304-11192-lahg8b sitelibdir\=./.gem.20240304-11192-lahg8b
compiling parser.c
parser.c:31:18: warning: unused variable 'http_parser_en_main' [-Wunused-const-variable]
static const int http_parser_en_main = 1;
                 ^
1 warning generated.
compiling thin.c
thin.c:242:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(hp);
  ^
thin.c:242:3: note: did you mean 'http_parser_init'?
./parser.h:41:5: note: 'http_parser_init' declared here
int http_parser_init(http_parser *parser);
    ^
thin.c:260:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(http);
  ^
thin.c:277:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(http);
  ^
thin.c:294:3: error: call to undeclared function 'thin_http_parser_finish'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_finish(http);
  ^
thin.c:294:3: note: did you mean 'Thin_HttpParser_finish'?
thin.c:290:7: note: 'Thin_HttpParser_finish' declared here
VALUE Thin_HttpParser_finish(VALUE self)
      ^
thin.c:296:10: error: call to undeclared function 'thin_http_parser_is_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_is_finished(http) ? Qtrue : Qfalse;
         ^
thin.c:334:5: error: call to undeclared function 'thin_http_parser_execute'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    thin_http_parser_execute(http, dptr, dlen, from);
    ^
thin.c:334:5: note: did you mean 'Thin_HttpParser_execute'?
thin.c:317:7: note: 'Thin_HttpParser_execute' declared here
VALUE Thin_HttpParser_execute(VALUE self, VALUE req_hash, VALUE data, VALUE start)
      ^
thin.c:338:8: error: call to undeclared function 'thin_http_parser_has_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if(thin_http_parser_has_error(http)) {
       ^
thin.c:338:8: note: did you mean 'http_parser_has_error'?
./parser.h:44:5: note: 'http_parser_has_error' declared here
int http_parser_has_error(http_parser *parser);
    ^
thin.c:359:10: error: call to undeclared function 'thin_http_parser_has_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_has_error(http) ? Qtrue : Qfalse;
         ^
thin.c:374:10: error: call to undeclared function 'thin_http_parser_is_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_is_finished(http) ? Qtrue : Qfalse;
         ^
9 errors generated.
make: *** [thin.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2 for inspection.
Results logged to /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/extensions/arm64-darwin-23/3.3.0/thin-1.6.2/gem_make.out

  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:125:in `run'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:51:in `block in make'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:43:in `each'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:43:in `make'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/ext_conf_builder.rb:42:in `build'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:193:in `build_extension'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:227:in `block in build_extensions'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:224:in `each'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/ext/builder.rb:224:in `build_extensions'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/3.3.0/rubygems/installer.rb:852:in `build_extensions'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/rubygems_gem_installer.rb:76:in `build_extensions'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/rubygems_gem_installer.rb:28:in `install'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/source/rubygems.rb:205:in `install'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/installer/gem_installer.rb:54:in `install'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/installer/gem_installer.rb:16:in `install_from_spec'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/installer/parallel_installer.rb:132:in `do_install'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/installer/parallel_installer.rb:123:in `block in worker_pool'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/worker.rb:62:in `apply_func'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/worker.rb:57:in `block in process_queue'
  <internal:kernel>:187:in `loop'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/worker.rb:54:in `process_queue'
  /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/bundler-2.5.6/lib/bundler/worker.rb:90:in `block (2 levels) in create_threads'

An error occurred while installing thin (1.6.2), and Bundler cannot continue.

In Gemfile:
  mailcatcher was resolved to 0.2.4, which depends on
    skinny was resolved to 0.2.4, which depends on
      thin
  ~/Code ❯ gem install thin                                                                                                                                        6s  3.3.0  20.11.0  09:19:45 AM
Building native extensions. This could take a while...
Successfully installed thin-1.8.2
Parsing documentation for thin-1.8.2
Done installing documentation for thin after 0 seconds
1 gem installed
  ~/Code ❯ gem install thin -v 1.6.2                                                                                                                                    3.3.0  20.11.0  09:19:55 AM
Building native extensions. This could take a while...
ERROR:  Error installing thin:
	ERROR: Failed to build gem native extension.

    current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
/Users/michaelmcain/.asdf/installs/ruby/3.3.0/bin/ruby extconf.rb
checking for main() in -lc... yes
creating Makefile

current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20240304-12163-2f5nl1 sitelibdir\=./.gem.20240304-12163-2f5nl1 clean

current directory: /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2/ext/thin_parser
make DESTDIR\= sitearchdir\=./.gem.20240304-12163-2f5nl1 sitelibdir\=./.gem.20240304-12163-2f5nl1
compiling parser.c
parser.c:31:18: warning: unused variable 'http_parser_en_main' [-Wunused-const-variable]
static const int http_parser_en_main = 1;
                 ^
1 warning generated.
compiling thin.c
thin.c:242:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(hp);
  ^
thin.c:242:3: note: did you mean 'http_parser_init'?
./parser.h:41:5: note: 'http_parser_init' declared here
int http_parser_init(http_parser *parser);
    ^
thin.c:260:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(http);
  ^
thin.c:277:3: error: call to undeclared function 'thin_http_parser_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_init(http);
  ^
thin.c:294:3: error: call to undeclared function 'thin_http_parser_finish'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  thin_http_parser_finish(http);
  ^
thin.c:294:3: note: did you mean 'Thin_HttpParser_finish'?
thin.c:290:7: note: 'Thin_HttpParser_finish' declared here
VALUE Thin_HttpParser_finish(VALUE self)
      ^
thin.c:296:10: error: call to undeclared function 'thin_http_parser_is_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_is_finished(http) ? Qtrue : Qfalse;
         ^
thin.c:334:5: error: call to undeclared function 'thin_http_parser_execute'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    thin_http_parser_execute(http, dptr, dlen, from);
    ^
thin.c:334:5: note: did you mean 'Thin_HttpParser_execute'?
thin.c:317:7: note: 'Thin_HttpParser_execute' declared here
VALUE Thin_HttpParser_execute(VALUE self, VALUE req_hash, VALUE data, VALUE start)
      ^
thin.c:338:8: error: call to undeclared function 'thin_http_parser_has_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if(thin_http_parser_has_error(http)) {
       ^
thin.c:338:8: note: did you mean 'http_parser_has_error'?
./parser.h:44:5: note: 'http_parser_has_error' declared here
int http_parser_has_error(http_parser *parser);
    ^
thin.c:359:10: error: call to undeclared function 'thin_http_parser_has_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_has_error(http) ? Qtrue : Qfalse;
         ^
thin.c:374:10: error: call to undeclared function 'thin_http_parser_is_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
  return thin_http_parser_is_finished(http) ? Qtrue : Qfalse;
         ^
9 errors generated.
make: *** [thin.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/gems/thin-1.6.2 for inspection.
Results logged to /Users/michaelmcain/.asdf/installs/ruby/3.3.0/lib/ruby/gems/3.3.0/extensions/arm64-darwin-23/3.3.0/thin-1.6.2/gem_make.out

[ngudbhav]

I was able to install on Mac M1 by following the steps in this issue #365