BUILD FAILED (macOS 15.1 on arm64 using ruby-build 20241030)

[Mihai-github]

Hi guys,

Does anybody know how to fix this error? I'm trying to install using rbenv different version of ruby and it keeps failing :(

readline.c:1903:37: error: use of undeclared identifier 'username_completion_function'; did you mean 'rl_username_completion_function'?
 1903 |                                     rl_username_completion_function);
      |                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                     rl_username_completion_function
readline.c:79:42: note: expanded from macro 'rl_username_completion_function'
   79 | # define rl_username_completion_function username_completion_function
      |                                          ^
/usr/local/opt/readline/include/readline/readline.h:494:14: note: 'rl_username_completion_function' declared here
  494 | extern char *rl_username_completion_function (const char *, int);
      |              ^
1 error generated.
compiling init.c
linking shared-object rbconfig/sizeof.bundle
make[2]: *** [readline.o] Error 1
make[1]: *** [ext/readline/all] Error 2
make[1]: *** Waiting for unfinished jobs....
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
installing default libraries
compiling stringio.c
compiling strscan.c
compiling constants.c
checking ../.././parse.y and ../.././ext/ripper/eventids2.c
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
compiling basicsocket.c
ripper.c:10310:9: warning: variable 'yynerrs' set but not used [-Wunused-but-set-variable]
 10310 |     int yynerrs = 0;
       |         ^
installing default ripper libraries
compiling socket.c
compiling ipsocket.c
compiling tcpsocket.c
compiling tcpserver.c
compiling sockssocket.c
linking shared-object strscan.bundle
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
compiling udpsocket.c
compiling unixsocket.c
compiling unixserver.c
compiling option.c
compiling ancdata.c
compiling raddrinfo.c
compiling ifaddr.c
installing default socket libraries
linking shared-object stringio.bundle
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
linking shared-object nkf.bundle
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
linking shared-object socket.bundle
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
1 warning generated.
linking shared-object ripper.bundle
ld: warning: ignoring duplicate libraries: '-lruby.3.2'
make: *** [build-ext] Error 2
external command failed with status 2

[mislav]

It's a common error but I'm not sure what causes it. My best guess: you have migrated your Homebrew installation from an Intel Mac, but now you have an M1/M2 machine. The libraries that were ported from the old system are compiled for the wrong architecture. You could try brew reinstall readline and see if that helps. If not, you could try reinstalling or otherwise migrating Homebrew completely from /usr/local (where it used to be on Intel Macs) to /opt/homebrew, its default location on M1/M2 machines.