Byebug install error

[katawura]

l am currently trying to install byebug with my rails project and keep getting this error

An error occurred while installing byebug (9.0.5), and Bundler cannot continue.
Make sure that `gem install byebug -v '9.0.5'` succeeds before bundling.

Any idea why this would be?

[dmitry]

@katawura please include compilation log.

[notcreativeusername]

Same issue for me...

prompt$ gem install byebug -v '9.0.5'
Building native extensions. This could take a while...
ERROR: Error installing byebug:
ERROR: Failed to build gem native extension.

/Users/myid/.rvm/rubies/ruby-2.2.4/bin/ruby -r ./siteconf20160929-41835-10wdbb2.rb extconf.rb

creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling breakpoint.c
couldn't understand kern.osversion `15.6.0'
cc1: error: unrecognized command line option "-Wdivision-by-zero"
make: *** [breakpoint.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/myid/.rvm/gems/ruby-2.2.4/gems/byebug-9.0.5 for inspection.
Results logged to /Users/myid/.rvm/gems/ruby-2.2.4/extensions/x86_64-darwin-15/2.2.0/byebug-9.0.5/gem_make.out

[dmitry]

@notcreativeusername can you please include /Users/myid/.rvm/gems/ruby-2.2.4/extensions/x86_64-darwin-15/2.2.0/byebug-9.0.5/gem_make.out here ?

[notcreativeusername]

Not sure it will help much.... and FYI to get around this error I ran sudo gem install byebug -v '9.0.5' and it didn't throw this error. Not ideal but it works.

/Users/myid/.rvm/rubies/ruby-2.2.4/bin/ruby -r ./siteconf20160929-41835-10wdbb2.rb extconf.rb
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling breakpoint.c
couldn't understand kern.osversion `15.6.0'
cc1: error: unrecognized command line option "-Wdivision-by-zero"
make: *** [breakpoint.o] Error 1

make failed, exit code 2

[dmitry]

Looks like it only happens on Mac OS.

So sudo gem install byebug -v '9.0.5' successfully compiled byebug?

[dmitry]

sudo which gcc and which gcc have the same paths?

[notcreativeusername]

looks like it installed ok

prompt$ sudo gem install byebug -v '9.0.5'
Password:
Fetching: byebug-9.0.5.gem (100%)
Building native extensions. This could take a while...
Successfully installed byebug-9.0.5
Parsing documentation for byebug-9.0.5
Installing ri documentation for byebug-9.0.5
Done installing documentation for byebug after 22 seconds
1 gem installed

and yes it appears they have the same path

prompt$ sudo which gcc
Password:
/usr/bin/gcc
prompt$ which gcc
/usr/bin/gcc

[dmitry]

I'm not a Mac user, but looks like the only solution is to use:

CC=llvm-gcc gem install byebug -v '9.0.5'

[notcreativeusername]

I tried that before and it didn't work unless I typed something wrong.....

prompt$ CC=llvm-gcc gem install byebug -v '9.0.5'
Building native extensions. This could take a while...
ERROR: Error installing byebug:
ERROR: Failed to build gem native extension.

/Users/myid/.rvm/rubies/ruby-2.2.4/bin/ruby -r ./siteconf20160929-41761-hgkxot.rb extconf.rb

creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling breakpoint.c
couldn't understand kern.osversion `15.6.0'
cc1: error: unrecognized command line option "-Wdivision-by-zero"
make: *** [breakpoint.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/myid/.rvm/gems/ruby-2.2.4/gems/byebug-9.0.5 for inspection.
Results logged to /Users/myid/.rvm/gems/ruby-2.2.4/extensions/x86_64-darwin-15/2.2.0/byebug-9.0.5/gem_make.out

[deivid-rodriguez]

Try a clean install of another ruby. If that works I think this is a problem with your current ruby. If it doesn't it might be a problem in byebug. For example,

rvm install 2.2.5
rvm use 2.2.5
gem install byebug

Speaking from memory since I don't use rvm.

[deivid-rodriguez]

@notcreativeusername anything?

[harishsr]

I had the same problem. Installing XCode Command Line Tools fixed it.

[deivid-rodriguez]

Closing since it's an old issue probably unrelated to byebug, thanks for the feedback!

[ljromero]

Confirmed @deivid-rodriguez! Upgrading rvm fixes this issue.

rvm/rvm#4371 (comment)

[mjj4685]

This worked for me!

sudo gem install byebug -v '11.1.3'

Fetching byebug-11.1.3.gem
Building native extensions. This could take a while...
Successfully installed byebug-11.1.3
Parsing documentation for byebug-11.1.3
Installing ri documentation for byebug-11.1.3
Done installing documentation for byebug after 22 seconds
1 gem installed

[hipertracker]

I does NOT work on the latest stable macOS 11.4

gem install byebug -v '11.1.3'
❯ gem install byebug -v '11.1.3'
Building native extensions. This could take a while...
ERROR:  Error installing byebug:
	ERROR: Failed to build gem native extension.

    current directory: /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/gems/3.0.0/gems/byebug-11.1.3/ext/byebug
/Users/hipertracker/.frum/versions/3.0.2/bin/ruby -I /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/3.0.0 -r ./siteconf20210717-27404-hz68wf.rb extconf.rb
creating Makefile

current directory: /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/gems/3.0.0/gems/byebug-11.1.3/ext/byebug
make DESTDIR\= clean

current directory: /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/gems/3.0.0/gems/byebug-11.1.3/ext/byebug
make DESTDIR\=
compiling breakpoint.c
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/defines.h:73:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/backward/2/attributes.h:43:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/pure.h:25:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/assert.h:132:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NORETURN()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noreturn.h:29:33: note: expanded from macro 'RBIMPL_ATTR_NORETURN'
# define RBIMPL_ATTR_NORETURN() __declspec(noreturn)
                                ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:24:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/anyargs.h:77:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/intern/vm.h:64:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NORETURN()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noreturn.h:29:33: note: expanded from macro 'RBIMPL_ATTR_NORETURN'
# define RBIMPL_ATTR_NORETURN() __declspec(noreturn)
                                ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/int.h:26:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/long.h:70:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NORETURN()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noreturn.h:29:33: note: expanded from macro 'RBIMPL_ATTR_NORETURN'
# define RBIMPL_ATTR_NORETURN() __declspec(noreturn)
                                ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:28:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:46:14: error: expected parameter declarator
RUBY_ALIGNAS(SIZEOF_VALUE)
             ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/value.h:41:23: note: expanded from macro 'SIZEOF_VALUE'
# define SIZEOF_VALUE SIZEOF_LONG
                      ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/x86_64-darwin20/ruby/config.h:64:21: note: expanded from macro 'SIZEOF_LONG'
#define SIZEOF_LONG 8
                    ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:28:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:46:14: error: expected ')'
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/value.h:41:23: note: expanded from macro 'SIZEOF_VALUE'
# define SIZEOF_VALUE SIZEOF_LONG
                      ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/x86_64-darwin20/ruby/config.h:64:21: note: expanded from macro 'SIZEOF_LONG'
#define SIZEOF_LONG 8
                    ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:46:1: note: to match this '('
RUBY_ALIGNAS(SIZEOF_VALUE)
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/backward/2/stdalign.h:27:22: note: expanded from macro 'RUBY_ALIGNAS'
#define RUBY_ALIGNAS RBIMPL_ALIGNAS
                     ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/stdalign.h:66:44: note: expanded from macro 'RBIMPL_ALIGNAS'
# define RBIMPL_ALIGNAS(_) __declspec(align(_))
                                           ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:28:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:47:1: error: expected function body after function declarator
RBasic {
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:82:23: error: incomplete definition of type 'struct RBasic'
    return RBASIC(obj)->klass;
           ~~~~~~~~~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:82:12: note: forward declaration of 'struct RBasic'
    return RBASIC(obj)->klass;
           ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:50: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                                                 ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:35:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/value_type.h:157:28: error: incomplete definition of type 'struct RBasic'
    VALUE ret = RBASIC(obj)->flags & RUBY_T_MASK;
                ~~~~~~~~~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/value_type.h:157:17: note: forward declaration of 'struct RBasic'
    VALUE ret = RBASIC(obj)->flags & RUBY_T_MASK;
                ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:50: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                                                 ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:237:23: error: incomplete definition of type 'struct RBasic'
    return RBASIC(obj)->flags & flags;
           ~~~~~~~~~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:237:12: note: forward declaration of 'struct RBasic'
    return RBASIC(obj)->flags & flags;
           ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:50: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                                                 ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:285:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NOALIAS()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noalias.h:53:32: note: expanded from macro 'RBIMPL_ATTR_NOALIAS'
# define RBIMPL_ATTR_NOALIAS() __declspec(noalias)
                               ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:288:30: warning: declaration of 'struct RBasic' will not be visible outside of this function [-Wvisibility]
rbimpl_fl_set_raw_raw(struct RBasic *obj, VALUE flags)
                             ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:290:8: error: incomplete definition of type 'struct RBasic'
    obj->flags |= flags;
    ~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:288:30: note: forward declaration of 'struct RBasic'
rbimpl_fl_set_raw_raw(struct RBasic *obj, VALUE flags)
                             ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:298:27: warning: incompatible pointer types passing 'struct RBasic *' to parameter of type 'struct RBasic *' [-Wincompatible-pointer-types]
    rbimpl_fl_set_raw_raw(RBASIC(obj), flags);
                          ^~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:30: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/cast.h:33:28: note: expanded from macro 'RBIMPL_CAST'
# define RBIMPL_CAST(expr) (expr)
                           ^~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:288:38: note: passing argument to parameter 'obj' here
rbimpl_fl_set_raw_raw(struct RBasic *obj, VALUE flags)
                                     ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:310:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NOALIAS()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noalias.h:53:32: note: expanded from macro 'RBIMPL_ATTR_NOALIAS'
# define RBIMPL_ATTR_NOALIAS() __declspec(noalias)
                               ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:313:32: warning: declaration of 'struct RBasic' will not be visible outside of this function [-Wvisibility]
rbimpl_fl_unset_raw_raw(struct RBasic *obj, VALUE flags)
                               ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:315:8: error: incomplete definition of type 'struct RBasic'
    obj->flags &= ~flags;
    ~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:313:32: note: forward declaration of 'struct RBasic'
rbimpl_fl_unset_raw_raw(struct RBasic *obj, VALUE flags)
                               ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:323:29: warning: incompatible pointer types passing 'struct RBasic *' to parameter of type 'struct RBasic *' [-Wincompatible-pointer-types]
    rbimpl_fl_unset_raw_raw(RBASIC(obj), flags);
                            ^~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:30: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/cast.h:33:28: note: expanded from macro 'RBIMPL_CAST'
# define RBIMPL_CAST(expr) (expr)
                           ^~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:313:40: note: passing argument to parameter 'obj' here
rbimpl_fl_unset_raw_raw(struct RBasic *obj, VALUE flags)
                                       ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:335:1: error: '__declspec' attributes are not enabled; use '-fdeclspec' or '-fms-extensions' to enable support for __declspec attributes
RBIMPL_ATTR_NOALIAS()
^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/attr/noalias.h:53:32: note: expanded from macro 'RBIMPL_ATTR_NOALIAS'
# define RBIMPL_ATTR_NOALIAS() __declspec(noalias)
                               ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:30:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:338:34: warning: declaration of 'struct RBasic' will not be visible outside of this function [-Wvisibility]
rbimpl_fl_reverse_raw_raw(struct RBasic *obj, VALUE flags)
                                 ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:340:8: error: incomplete definition of type 'struct RBasic'
    obj->flags ^= flags;
    ~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:338:34: note: forward declaration of 'struct RBasic'
rbimpl_fl_reverse_raw_raw(struct RBasic *obj, VALUE flags)
                                 ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:348:31: warning: incompatible pointer types passing 'struct RBasic *' to parameter of type 'struct RBasic *' [-Wincompatible-pointer-types]
    rbimpl_fl_reverse_raw_raw(RBASIC(obj), flags);
                              ^~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:30: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/cast.h:33:28: note: expanded from macro 'RBIMPL_CAST'
# define RBIMPL_CAST(expr) (expr)
                           ^~~~~~
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:338:42: note: passing argument to parameter 'obj' here
rbimpl_fl_reverse_raw_raw(struct RBasic *obj, VALUE flags)
                                         ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:465:43: error: incomplete definition of type 'struct RBasic'
        if (RBASIC_CLASS(x) && !(RBASIC(x)->flags & RUBY_FL_SINGLETON)) {
                                 ~~~~~~~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/fl_type.h:465:34: note: forward declaration of 'struct RBasic'
        if (RBASIC_CLASS(x) && !(RBASIC(x)->flags & RUBY_FL_SINGLETON)) {
                                 ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rbasic.h:34:50: note: expanded from macro 'RBASIC'
#define RBASIC(obj)          RBIMPL_CAST((struct RBasic *)(obj))
                                                 ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:25:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic.h:23:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/arithmetic/char.h:29:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:74:19: error: field has incomplete type 'struct RBasic'
    struct RBasic basic;
                  ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:74:12: note: forward declaration of 'struct RBasic'
    struct RBasic basic;
           ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:109:26: error: incomplete definition of type 'struct RBasic'
    VALUE f = RBASIC(str)->flags;
              ~~~~~~~~~~~^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:74:12: note: forward declaration of 'struct RBasic'
    struct RBasic basic;
           ^
In file included from breakpoint.c:1:
In file included from ./byebug.h:4:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby.h:38:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/ruby.h:26:
In file included from /Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core.h:23:
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rarray.h:88:19: error: field has incomplete type 'struct RBasic'
    struct RBasic basic;
                  ^
/Users/hipertracker/.frum/versions/3.0.2/include/ruby-3.0.0/ruby/internal/core/rstring.h:74:12: note: forward declaration of 'struct RBasic'
    struct RBasic basic;
           ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
6 warnings and 20 errors generated.
make: *** [breakpoint.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/gems/3.0.0/gems/byebug-11.1.3 for inspection.
Results logged to /Users/hipertracker/.frum/versions/3.0.2/lib/ruby/gems/3.0.0/extensions/x86_64-darwin-20/3.0.0-static/byebug-11.1.3/gem_make.out

[orthodoX]

I can confirm it is not working on Ruby 3.0.1 running on Apple M1, macOS 11.5.2

[tubsandcans]

I'm also unable to install this extension (or sqlite3 1.4.2) using Ruby 3.0.0 or 3.0.2 on macOS (Intel) 11.5.2.

[timtim22]

guys, any update on this? I am also not able to install it on Apple M1, Big Sur

[mbpod10]

I am also having issues, running Big Sur. Same problem as above.

[jaw6]

I definitely don't have this 100% but in case this is useful to someone else, here's what I did to get this working.

Background: I have an Intel MacBookPro on Catalina (10.15.7).

I was getting the above error message and the messages seemed to be coming from C, which made me think it could be a C-compiler problem.

So, with homebrew, I was able to install a newer clang/llvm:

brew install llvm

And then use it:

export CC=/usr/local/opt/llvm/bin/clang

After this I was able to install byebug. I'm not aware of anything else I did, so I think this made the difference.

In case it's helpful, here are the versions of clang before/after:

❯ /usr/bin/clang -v
Apple clang version 11.0.3 (clang-1103.0.32.62)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

❯ /usr/local/opt/llvm/bin/clang -v
Homebrew clang version 13.0.0
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin

[cheradenine]

This might help - have not tried it yet to confirm..

#825 comment 903260365

[ronaldtse]

I also encountered this error (Apple M1, Monterey), and it worked after setting export CC=clang.

[cyangOL]

I got it working with below steps on big sur:
Reinstall commandline tools

sudo rm -rf /Library/Developer/CommandLineTools
xcode-select --install

Install llvm

brew install llvm

Set cc and ccx to llvm from homebrew
export CC=/usr/local/opt/llvm/bin/clang
export CCX=/usr/local/opt/llvm/bin/clang

[akahn]

Thank you. This solution worked for me. However, on my setup, Homebrew installed the clang executable in a different directory, and it was only necessary to set CC. So, for me, this was enough:

brew install llvm
export CC=/opt/homebrew/opt/llvm/bin/clang

[dmlo]

For the people coming here from search engines... Installing older versions of byebug (in my case, 4.0.5) required the installation of llvm@11 and then

export CC=/usr/local/opt/llvm@11/bin/clang
export CCX=/usr/local/opt/llvm@11/bin/clang

Oh, the joys of legacy development.

[bbulpett]

Using Ventura, I had the same issue and tried the above solutions. I tried them in the embedded IDE terminal (vs code) and gem install showed same error - even when restarting embedded terminal. Then I switched to the OG mac terminal app and gem install byebug and subsequent bundle install completed without issue.