Build failed trying to install 3.0.0 (MacOS 15.1, M3 Pro)

[Nachot93]

This is the error that the terminal gives me:

BUILD FAILED (macOS 15.1 on arm64 using ruby-build 20241105)

And this is the log:

bigdecimal.c:249:5: error: 'maybe_unused' attribute cannot be applied to types
  249 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:372:5: error: 'maybe_unused' attribute cannot be applied to types
  372 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:405:5: error: 'maybe_unused' attribute cannot be applied to types
  405 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:456:5: error: 'maybe_unused' attribute cannot be applied to types
  456 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:490:5: error: 'maybe_unused' attribute cannot be applied to types
  490 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:519:5: error: 'maybe_unused' attribute cannot be applied to types
  519 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:541:5: error: 'maybe_unused' attribute cannot be applied to types
  541 |     ENTER(2);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:861:5: error: 'maybe_unused' attribute cannot be applied to types
  861 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:908:5: error: 'maybe_unused' attribute cannot be applied to types
  908 |     ENTER(1);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1001:5: error: 'maybe_unused' attribute cannot be applied to types
 1001 |     ENTER(2);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1058:5: error: 'maybe_unused' attribute cannot be applied to types
 1058 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1116:5: error: 'maybe_unused' attribute cannot be applied to types
 1116 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1157:5: error: 'maybe_unused' attribute cannot be applied to types
 1157 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1353:5: error: 'maybe_unused' attribute cannot be applied to types
 1353 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1379:5: error: 'maybe_unused' attribute cannot be applied to types
 1379 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1407:5: error: 'maybe_unused' attribute cannot be applied to types
 1407 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1449:5: error: 'maybe_unused' attribute cannot be applied to types
 1449 |     ENTER(5);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1472:5: error: 'maybe_unused' attribute cannot be applied to types
 1472 |     ENTER(8);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
bigdecimal.c:1560:5: error: 'maybe_unused' attribute cannot be applied to types
 1560 |     ENTER(3);
      |     ^
bigdecimal.c:68:33: note: expanded from macro 'ENTER'
   68 | #define ENTER(n) volatile VALUE RB_UNUSED_VAR(vStack[n]);int iStack=0
      |                                 ^
../.././include/ruby/backward/2/attributes.h:168:28: note: expanded from macro 'RB_UNUSED_VAR'
  168 | #define RB_UNUSED_VAR(x) x RBIMPL_ATTR_MAYBE_UNUSED()
      |                            ^
../.././include/ruby/internal/attr/maybe_unused.h:31:39: note: expanded from macro 'RBIMPL_ATTR_MAYBE_UNUSED'
   31 | # define RBIMPL_ATTR_MAYBE_UNUSED() [[maybe_unused]]
      |                                       ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

[mislav]

Hi, this looks like a problem that got patched in Ruby 3.1+ but not in 3.0 since it's unsupported.

You could try applying the patch manually when building:

curl -fsSL https://github.com/ruby/ruby/commit/1dfe75b0beb7171b8154ff0856d5149be0207724.patch | rbenv install --patch 3.0.7