Compile errors on Ruby 3.1.0 OSX Apple Silicon, version 0.4.6

[bf4]

As noted in knu/sorted_set#15 and related perhaps to #2 I'm getting a compile error for rbtree on Ruby 3.1.2 and haven't gotten to the root of it yet, so thought I'd report here.

I'm happy to try to help debug as well.

rbtree.c:763:25: error: cannot assign to non-static data member 'klass' with
const-qualified type 'const VALUE' (aka 'const unsigned long')
    RBASIC(temp)->klass = 0;
    ~~~~~~~~~~~~~~~~~~~ ^

.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/internal/core/rbasic.h:88:
17:
note: non-static data member 'klass' declared const here
    const VALUE klass;
    ~~~~~~~~~~~~^~~~~
rbtree.c:1418:9: error: call to undeclared function 'rb_inspecting_p'; ISO C99 and later
do not support implicit function declarations [-Wimplicit-function-declaration]
    if (rb_inspecting_p(self))
        ^
rbtree.c:1418:9: note: did you mean 'rb_inspect'?
.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/internal/intern/object.h:1
21:7:
note: 'rb_inspect' declared here
VALUE rb_inspect(VALUE obj);
      ^
rbtree.c:1420:12: error: call to undeclared function 'rb_protect_inspect'; ISO C99 and
later do not support implicit function declarations [-Wimplicit-function-declaration]
    return rb_protect_inspect(inspect_rbtree, self, str);
           ^
3 errors generated.
make: *** [rbtree.o] Error 1

clang --version
Apple clang version 15.0.0 (clang-1500.0.40.1)
Target: x86_64-apple-darwin23.1.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

>> RbConfig::CONFIG
>> RbConfig::CONFIG
=>
{"DESTDIR"=>"",
 "MAJOR"=>"3",
 "MINOR"=>"1",
 "TEENY"=>"2",
 "PATCHLEVEL"=>"20",
 "INSTALL"=>"/opt/homebrew/bin/ginstall -c",
 "EXEEXT"=>"",
 "prefix"=>"$HOME/.rbenv/versions/3.1.2",
 "ruby_install_name"=>"ruby",
 "RUBY_INSTALL_NAME"=>"ruby",
 "RUBY_SO_NAME"=>"ruby.3.1",
 "exec"=>"exec",
 "ruby_pc"=>"ruby-3.1.pc",
 "CC_WRAPPER"=>"",
 "PACKAGE"=>"ruby",
 "BUILTIN_TRANSSRCS"=>" enc/trans/newline.c",
 "MANTYPE"=>"doc",
 "vendorarchhdrdir"=>
  "$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0/vendor_ruby/arm64-darwin23",
 "sitearchhdrdir"=>
  "$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0/site_ruby/arm64-darwin23",
 "rubyarchhdrdir"=>
  "$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0/arm64-darwin23",
 "vendorhdrdir"=>"$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0/vendor_ruby",
 "sitehdrdir"=>"$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0/site_ruby",
 "rubyhdrdir"=>"$HOME/.rbenv/versions/3.1.2/include/ruby-3.1.0",
 "RUBY_SEARCH_PATH"=>"",
 "UNIVERSAL_INTS"=>"",
 "UNIVERSAL_ARCHNAMES"=>"",
 "configure_args"=>
  " '--prefix=$HOME/.rbenv/versions/3.1.2' '--with-openssl-dir=/opt/homebrew/opt/openssl@3' '--enable-shared' '--with-readline-dir=/opt/homebrew/opt/readline' '--with-libyaml-dir=/opt/homebrew/opt/libyaml' '--with-gmp-dir=/opt/homebrew/opt/gmp' '--with-ext=openssl,psych,+' 'CC=clang' 'LDFLAGS=-L/opt/homebrew/opt/libomp/lib' 'CPPFLAGS=-I/opt/homebrew/opt/libomp/include'",
 "CONFIGURE"=>"configure",
 "vendorarchdir"=>
  "$HOME/.rbenv/versions/3.1.2/lib/ruby/vendor_ruby/3.1.0/arm64-darwin23",
 "vendorlibdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/vendor_ruby/3.1.0",
 "vendordir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/vendor_ruby",
 "sitearchdir"=>
  "$HOME/.rbenv/versions/3.1.2/lib/ruby/site_ruby/3.1.0/arm64-darwin23",
 "sitelibdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/site_ruby/3.1.0",
 "sitedir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/site_ruby",
 "rubyarchdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/3.1.0/arm64-darwin23",
 "rubylibdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/3.1.0",
 "ruby_version"=>"3.1.0",
 "sitearch"=>"arm64-darwin23",
 "arch"=>"arm64-darwin23",
 "sitearchincludedir"=>"$HOME/.rbenv/versions/3.1.2/include/arm64-darwin23",
 "archincludedir"=>"$HOME/.rbenv/versions/3.1.2/include/arm64-darwin23",
 "sitearchlibdir"=>"$HOME/.rbenv/versions/3.1.2/lib/arm64-darwin23",
 "archlibdir"=>"$HOME/.rbenv/versions/3.1.2/lib/arm64-darwin23",
 "libdirname"=>"libdir",
 "RUBY_EXEC_PREFIX"=>"$HOME/.rbenv/versions/3.1.2",
 "RUBY_LIB_VERSION"=>"",
 "RUBY_LIB_VERSION_STYLE"=>"3\t/* full */",
 "RI_BASE_NAME"=>"ri",
 "ridir"=>"$HOME/.rbenv/versions/3.1.2/share/ri",
 "rubysitearchprefix"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/arm64-darwin23",
 "rubyarchprefix"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/arm64-darwin23",
 "MAKEFILES"=>"Makefile GNUmakefile",
 "PLATFORM_DIR"=>"",
 "THREAD_MODEL"=>"pthread",
 "SYMBOL_PREFIX"=>"_",
 "EXPORT_PREFIX"=>"",
 "COMMON_HEADERS"=>"",
 "COMMON_MACROS"=>"",
 "COMMON_LIBS"=>"",
 "MAINLIBS"=>"-lpthread -ldl -lobjc",
 "ENABLE_SHARED"=>"yes",
 "DLDSHARED"=>"clang -dynamiclib",
 "DLDLIBS"=>"",
 "SOLIBS"=>"-lpthread -ldl -lobjc",
 "LIBRUBYARG_SHARED"=>"-lruby.3.1",
 "LIBRUBYARG_STATIC"=>
  "-lruby.3.1-static -framework CoreFoundation -lpthread -ldl -lobjc",
 "LIBRUBYARG"=>"-lruby.3.1",
 "LIBRUBY"=>"libruby.3.1.dylib",
 "LIBRUBY_ALIASES"=>"libruby.dylib",
 "LIBRUBY_SONAME"=>"libruby.3.1.dylib",
 "LIBRUBY_SO"=>"libruby.3.1.dylib",
 "LIBRUBY_A"=>"libruby.3.1-static.a",
 "RUBYW_INSTALL_NAME"=>"",
 "rubyw_install_name"=>"",
 "EXTDLDFLAGS"=>"",
 "EXTLDFLAGS"=>"",
 "strict_warnflags"=>"-std=gnu99",
 "warnflags"=>
  "-Wall -Wextra -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wold-style-definition -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens -Wundef",
 "debugflags"=>"-ggdb3",
 "optflags"=>"-O3 -fno-fast-math",
 "NULLCMD"=>":",
 "ENABLE_DEBUG_ENV"=>"",
 "DLNOBJ"=>"dln.o",
 "INSTALL_STATIC_LIBRARY"=>"no",
 "MJIT_SUPPORT"=>"yes",
 "EXECUTABLE_EXTS"=>"",
 "ARCHFILE"=>"",
 "LIBRUBY_RELATIVE"=>"no",
 "EXTOUT"=>".ext",
 "PREP"=>"miniruby exe/$(PROGRAM)",
 "CROSS_COMPILING"=>"no",
 "TEST_RUNNABLE"=>"yes",
 "rubylibprefix"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby",
 "setup"=>"Setup",
 "ENCSTATIC"=>"",
 "EXTSTATIC"=>"",
 "SOEXT"=>"dylib",
 "TRY_LINK"=>"",
 "PRELOADENV"=>"DYLD_INSERT_LIBRARIES",
 "LIBPATHENV"=>"DYLD_FALLBACK_LIBRARY_PATH",
 "RPATHFLAG"=>"",
 "LIBPATHFLAG"=>" -L%s",
 "LINK_SO"=>
  "\ndsymutil $@; { test -z '$(RUBY_CODESIGN)' || codesign -s '$(RUBY_CODESIGN)' -f $@; }",
 "ASMEXT"=>"S",
 "LIBEXT"=>"a",
 "DLEXT"=>"bundle",
 "LDSHAREDXX"=>"clang++ -dynamic -bundle",
 "LDSHARED"=>"clang -dynamic -bundle",
 "CCDLFLAGS"=>"-fno-common",
 "STATIC"=>"",
 "ARCH_FLAG"=>"",
 "DLDFLAGS"=>"-L/opt/homebrew/opt/libomp/lib -Wl,-undefined,dynamic_lookup",
 "ALLOCA"=>"",
 "dsymutil"=>"dsymutil",
 "codesign"=>"codesign",
 "cleanlibs"=>"$(TARGET_SO).dSYM",
 "POSTLINK"=>
  "dsymutil $@; { test -z '$(RUBY_CODESIGN)' || codesign -s '$(RUBY_CODESIGN)' -f $@; }",
 "WERRORFLAG"=>"-Werror",
 "CHDIR"=>"cd -P",
 "RMALL"=>"rm -fr",
 "RMDIRS"=>"rmdir -p",
 "RMDIR"=>"rmdir",
 "CP"=>"cp",
 "RM"=>"rm -f",
 "PKG_CONFIG"=>"pkg-config",
 "DOXYGEN"=>"doxygen",
 "DOT"=>"dot",
 "MAKEDIRS"=>"/opt/homebrew/bin/gmkdir -p",
 "MKDIR_P"=>"/opt/homebrew/bin/gmkdir -p",
 "INSTALL_DATA"=>"/opt/homebrew/bin/ginstall -c -m 644",
 "INSTALL_SCRIPT"=>"/opt/homebrew/bin/ginstall -c",
 "INSTALL_PROGRAM"=>"/opt/homebrew/bin/ginstall -c",
 "SET_MAKE"=>"",
 "LN_S"=>"ln -s",
 "DLLWRAP"=>"",
 "WINDRES"=>"",
 "ASFLAGS"=>"",
 "ARFLAGS"=>"rcu ",
 "try_header"=>"",
 "CC_VERSION_MESSAGE"=>
  "Apple clang version 15.0.0 (clang-1500.0.40.1)\nTarget: arm64-apple-darwin23.1.0\nThread model: posix\nInstalledDir: /Library/Developer/CommandLineTools/usr/bin",
 "CC_VERSION"=>"clang --version",
 "MJIT_CC"=>"/usr/bin/clang",
 "CSRCFLAG"=>"",
 "COUTFLAG"=>"-o ",
 "OUTFLAG"=>"-o ",
 "CPPOUTFILE"=>"-o conftest.i",
 "GNU_LD"=>"no",
 "GCC"=>"yes",
 "EGREP"=>"/usr/bin/grep -E",
 "GREP"=>"/usr/bin/grep",
 "CPP"=>"clang -E",
 "CXXFLAGS"=>"-fdeclspec",
 "OBJEXT"=>"o",
 "CPPFLAGS"=>
  "-I/opt/homebrew/opt/libomp/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT  ",
 "LDFLAGS"=>
  "-L. -L/opt/homebrew/opt/libomp/lib -fstack-protector-strong -L/usr/local/lib",
 "CFLAGS"=>
  "-fdeclspec -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wold-style-definition -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens -Wundef  -fno-common -pipe",
 "STRIP"=>"strip -A -n",
 "RANLIB"=>"ranlib",
 "OBJDUMP"=>"objdump",
 "OBJCOPY"=>":",
 "NM"=>"nm",
 "LD"=>"clang",
 "CXX"=>"clang++",
 "AS"=>"as",
 "AR"=>"ar",
 "CC"=>"clang",
 "target_os"=>"darwin23",
 "target_vendor"=>"apple",
 "target_cpu"=>"arm64",
 "target"=>"arm64-apple-darwin23",
 "host_os"=>"darwin23",
 "host_vendor"=>"apple",
 "host_cpu"=>"arm64",
 "host"=>"arm64-apple-darwin23",
 "build_os"=>"darwin23.1.0",
 "build_vendor"=>"apple",
 "build_cpu"=>"aarch64",
 "build"=>"aarch64-apple-darwin23.1.0",
 "RUBY_VERSION_NAME"=>"ruby-3.1.0",
 "RUBYW_BASE_NAME"=>"rubyw",
 "RUBY_BASE_NAME"=>"ruby",
 "RUBY_PROGRAM_VERSION"=>"3.1.2",
 "RUBY_API_VERSION"=>"3.1",
 "HAVE_GIT"=>"yes",
 "GIT"=>"git",
 "cxxflags"=>"",
 "cppflags"=>"",
 "cflags"=>
  "-fdeclspec -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wold-style-definition -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens -Wundef",
 "target_alias"=>"",
 "host_alias"=>"",
 "build_alias"=>"",
 "LIBS"=>"",
 "ECHO_T"=>"",
 "ECHO_N"=>"",
 "ECHO_C"=>"\\\\c",
 "DEFS"=>"",
 "mandir"=>"$HOME/.rbenv/versions/3.1.2/share/man",
 "localedir"=>"$HOME/.rbenv/versions/3.1.2/share/locale",
 "libdir"=>"$HOME/.rbenv/versions/3.1.2/lib",
 "psdir"=>"$HOME/.rbenv/versions/3.1.2/share/doc/ruby",
 "pdfdir"=>"$HOME/.rbenv/versions/3.1.2/share/doc/ruby",
 "dvidir"=>"$HOME/.rbenv/versions/3.1.2/share/doc/ruby",
 "htmldir"=>"$HOME/.rbenv/versions/3.1.2/share/doc/ruby",
 "infodir"=>"$HOME/.rbenv/versions/3.1.2/share/info",
 "docdir"=>"$HOME/.rbenv/versions/3.1.2/share/doc/ruby",
 "oldincludedir"=>"/usr/include",
 "includedir"=>"$HOME/.rbenv/versions/3.1.2/include",
 "runstatedir"=>"$HOME/.rbenv/versions/3.1.2/var/run",
 "localstatedir"=>"$HOME/.rbenv/versions/3.1.2/var",
 "sharedstatedir"=>"$HOME/.rbenv/versions/3.1.2/com",
 "sysconfdir"=>"$HOME/.rbenv/versions/3.1.2/etc",
 "datadir"=>"$HOME/.rbenv/versions/3.1.2/share",
 "datarootdir"=>"$HOME/.rbenv/versions/3.1.2/share",
 "libexecdir"=>"$HOME/.rbenv/versions/3.1.2/libexec",
 "sbindir"=>"$HOME/.rbenv/versions/3.1.2/sbin",
 "bindir"=>"$HOME/.rbenv/versions/3.1.2/bin",
 "exec_prefix"=>"$HOME/.rbenv/versions/3.1.2",
 "PACKAGE_URL"=>"",
 "PACKAGE_BUGREPORT"=>"",
 "PACKAGE_STRING"=>"",
 "PACKAGE_VERSION"=>"",
 "PACKAGE_TARNAME"=>"",
 "PACKAGE_NAME"=>"",
 "PATH_SEPARATOR"=>":",
 "SHELL"=>"/bin/sh",
 "UNICODE_VERSION"=>"13.0.0",
 "UNICODE_EMOJI_VERSION"=>"13.1",
 "SDKROOT"=>"",
 "platform"=>"arm64-darwin23",
 "archdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/3.1.0/arm64-darwin23",
 "topdir"=>"$HOME/.rbenv/versions/3.1.2/lib/ruby/3.1.0/arm64-darwin23"}

[mame]

I think it's a problem with your Ruby installation.

rbtree prefers rb_obj_hide(temp); over RBASIC(temp)->klass = 0; if available. rb_obj_hide has been since 2013, and Ruby 3.1 provides it. So there is something wrong with your Ruby 3.1 installation.

Can you show the log of ruby extconf.rb?

FYI, I could gem install rbtree successfully with Ruby 3.1.2 on darwin31 without any problem.

% ruby -v
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [arm64-darwin21].
% gem install rbtree
Fetching rbtree-0.4.6.gem
Building native extensions.
Successfully installed rbtree-0.4.6
Parsing documentation for rbtree-0.4.6
Installing ri documentation for rbtree-0.4.6
Done installing documentation for rbtree after 0 seconds
1 gem installed

[bf4]

It's possible, I did switch from rvm to rbenv. It could be something leftover somehow...

📝 $ ruby extconf.rb
checking for ruby/version.h... yes
checking for rb_exec_recursive() in ruby.h... no
checking for rb_exec_recursive_paired() in ruby.h... no
checking for rb_proc_lambda_p() in ruby.h... no
checking for rb_ary_resize() in ruby.h... no
checking for rb_obj_hide() in ruby.h... no
checking for rb_safe_level() in ruby.h... no
checking for rb_cData() in ruby.h... no
creating Makefile

Makefile

SHELL = /bin/sh

# V=0 quiet, V=1 verbose.  other values don't work.
V = 0
V0 = $(V:0=)
Q1 = $(V:1=)
Q = $(Q1:0=@)
ECHO1 = $(V:1=@ :)
ECHO = $(ECHO1:0=@ echo)
NULLCMD = :

#### Start of system configuration section. ####

srcdir = .
topdir = /Users/osxuser/.rbenv/versions/3.1.2/include/ruby-3.1.0
hdrdir = $(topdir)
arch_hdrdir = /Users/osxuser/.rbenv/versions/3.1.2/include/ruby-3.1.0/arm64-darwin23
PATH_SEPARATOR = :
VPATH = $(srcdir):$(arch_hdrdir)/ruby:$(hdrdir)/ruby
prefix = $(DESTDIR)/Users/osxuser/.rbenv/versions/3.1.2
rubysitearchprefix = $(rubylibprefix)/$(sitearch)
rubyarchprefix = $(rubylibprefix)/$(arch)
rubylibprefix = $(libdir)/$(RUBY_BASE_NAME)
exec_prefix = $(prefix)
vendorarchhdrdir = $(vendorhdrdir)/$(sitearch)
sitearchhdrdir = $(sitehdrdir)/$(sitearch)
rubyarchhdrdir = $(rubyhdrdir)/$(arch)
vendorhdrdir = $(rubyhdrdir)/vendor_ruby
sitehdrdir = $(rubyhdrdir)/site_ruby
rubyhdrdir = $(includedir)/$(RUBY_VERSION_NAME)
vendorarchdir = $(vendorlibdir)/$(sitearch)
vendorlibdir = $(vendordir)/$(ruby_version)
vendordir = $(rubylibprefix)/vendor_ruby
sitearchdir = $(sitelibdir)/$(sitearch)
sitelibdir = $(sitedir)/$(ruby_version)
sitedir = $(rubylibprefix)/site_ruby
rubyarchdir = $(rubylibdir)/$(arch)
rubylibdir = $(rubylibprefix)/$(ruby_version)
sitearchincludedir = $(includedir)/$(sitearch)
archincludedir = $(includedir)/$(arch)
sitearchlibdir = $(libdir)/$(sitearch)
archlibdir = $(libdir)/$(arch)
ridir = $(datarootdir)/$(RI_BASE_NAME)
mandir = $(datarootdir)/man
localedir = $(datarootdir)/locale
libdir = $(exec_prefix)/lib
psdir = $(docdir)
pdfdir = $(docdir)
dvidir = $(docdir)
htmldir = $(docdir)
infodir = $(datarootdir)/info
docdir = $(datarootdir)/doc/$(PACKAGE)
oldincludedir = $(DESTDIR)/usr/include
includedir = $(SDKROOT)$(prefix)/include
runstatedir = $(localstatedir)/run
localstatedir = $(prefix)/var
sharedstatedir = $(prefix)/com
sysconfdir = $(prefix)/etc
datadir = $(datarootdir)
datarootdir = $(prefix)/share
libexecdir = $(exec_prefix)/libexec
sbindir = $(exec_prefix)/sbin
bindir = $(exec_prefix)/bin
archdir = $(rubyarchdir)


CC_WRAPPER = 
CC = clang
CXX = clang++
LIBRUBY = $(LIBRUBY_SO)
LIBRUBY_A = lib$(RUBY_SO_NAME)-static.a
LIBRUBYARG_SHARED = -l$(RUBY_SO_NAME)
LIBRUBYARG_STATIC = -l$(RUBY_SO_NAME)-static -framework CoreFoundation $(MAINLIBS)
empty =
OUTFLAG = -o $(empty)
COUTFLAG = -o $(empty)
CSRCFLAG = $(empty)

RUBY_EXTCONF_H = 
cflags   = -fdeclspec $(optflags) $(debugflags) $(warnflags)
cxxflags = 
optflags = -O3 -fno-fast-math
debugflags = -ggdb3
warnflags = -Wall -Wextra -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wmisleading-indentation -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wold-style-definition -Wmissing-noreturn -Wno-cast-function-type -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens -Wundef
cppflags = 
CCDLFLAGS = -fno-common
CFLAGS   = $(CCDLFLAGS) $(cflags)  -fno-common -pipe $(ARCH_FLAG)
INCFLAGS = -I. -I$(arch_hdrdir) -I$(hdrdir)/ruby/backward -I$(hdrdir) -I$(srcdir)
DEFS     = 
CPPFLAGS = -DNDEBUG -DHAVE_RUBY_VERSION_H -DHAVE_HASH_FLATTEN -I/opt/homebrew/opt/libomp/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT $(DEFS) $(cppflags)
CXXFLAGS = $(CCDLFLAGS) -fdeclspec $(ARCH_FLAG)
ldflags  = -L. -L/opt/homebrew/opt/libomp/lib -fstack-protector-strong -L/usr/local/lib
dldflags = -L/opt/homebrew/opt/libomp/lib -Wl,-undefined,dynamic_lookup 
ARCH_FLAG = 
DLDFLAGS = $(ldflags) $(dldflags) $(ARCH_FLAG)
LDSHARED = $(CC) -dynamic -bundle
LDSHAREDXX = $(CXX) -dynamic -bundle
AR = ar
EXEEXT = 

RUBY_INSTALL_NAME = $(RUBY_BASE_NAME)
RUBY_SO_NAME = ruby.3.1
RUBYW_INSTALL_NAME = 
RUBY_VERSION_NAME = $(RUBY_BASE_NAME)-$(ruby_version)
RUBYW_BASE_NAME = rubyw
RUBY_BASE_NAME = ruby

arch = arm64-darwin23
sitearch = $(arch)
ruby_version = 3.1.0
ruby = $(bindir)/$(RUBY_BASE_NAME)
RUBY = $(ruby)
ruby_headers = $(hdrdir)/ruby.h $(hdrdir)/ruby/backward.h $(hdrdir)/ruby/ruby.h $(hdrdir)/ruby/defines.h $(hdrdir)/ruby/missing.h $(hdrdir)/ruby/intern.h $(hdrdir)/ruby/st.h $(hdrdir)/ruby/subst.h $(arch_hdrdir)/ruby/config.h

RM = rm -f
RM_RF = rm -fr
RMDIRS = rmdir -p
MAKEDIRS = /opt/homebrew/bin/gmkdir -p
INSTALL = /opt/homebrew/bin/ginstall -c
INSTALL_PROG = $(INSTALL) -m 0755
INSTALL_DATA = $(INSTALL) -m 644
COPY = cp
TOUCH = exit >

#### End of system configuration section. ####

preload = 
libpath = . $(libdir)
LIBPATH =  -L. -L$(libdir)
DEFFILE = 

CLEANFILES = mkmf.log
DISTCLEANFILES = 
DISTCLEANDIRS = 

extout = 
extout_prefix = 
target_prefix = 
LOCAL_LIBS = 
LIBS = $(LIBRUBYARG_SHARED)   
ORIG_SRCS = dict.c rbtree.c
SRCS = $(ORIG_SRCS) 
OBJS = dict.o rbtree.o
HDRS = $(srcdir)/dict.h
LOCAL_HDRS = 
TARGET = rbtree
TARGET_NAME = rbtree
TARGET_ENTRY = Init_$(TARGET_NAME)
DLLIB = $(TARGET).bundle
EXTSTATIC = 
STATIC_LIB = 

TIMESTAMP_DIR = .
BINDIR        = $(bindir)
RUBYCOMMONDIR = $(sitedir)$(target_prefix)
RUBYLIBDIR    = $(sitelibdir)$(target_prefix)
RUBYARCHDIR   = $(sitearchdir)$(target_prefix)
HDRDIR        = $(sitehdrdir)$(target_prefix)
ARCHHDRDIR    = $(sitearchhdrdir)$(target_prefix)
TARGET_SO_DIR =
TARGET_SO     = $(TARGET_SO_DIR)$(DLLIB)
CLEANLIBS     = $(TARGET_SO) $(TARGET_SO).dSYM
CLEANOBJS     = *.o  *.bak

all:    $(DLLIB)
static: $(STATIC_LIB)
.PHONY: all install static install-so install-rb
.PHONY: clean clean-so clean-static clean-rb

clean-static::
clean-rb-default::
clean-rb::
clean-so::
clean: clean-so clean-static clean-rb-default clean-rb
		-$(Q)$(RM_RF) $(CLEANLIBS) $(CLEANOBJS) $(CLEANFILES) .*.time

distclean-rb-default::
distclean-rb::
distclean-so::
distclean-static::
distclean: clean distclean-so distclean-static distclean-rb-default distclean-rb
		-$(Q)$(RM) Makefile $(RUBY_EXTCONF_H) conftest.* mkmf.log
		-$(Q)$(RM) core ruby$(EXEEXT) *~ $(DISTCLEANFILES)
		-$(Q)$(RMDIRS) $(DISTCLEANDIRS) 2> /dev/null || true

realclean: distclean
install: install-so install-rb

install-so: $(DLLIB) $(TIMESTAMP_DIR)/.sitearchdir.time
	$(INSTALL_PROG) $(DLLIB) $(RUBYARCHDIR)
clean-static::
	-$(Q)$(RM) $(STATIC_LIB)
install-rb: pre-install-rb do-install-rb install-rb-default
install-rb-default: pre-install-rb-default do-install-rb-default
pre-install-rb: Makefile
pre-install-rb-default: Makefile
do-install-rb:
do-install-rb-default:
pre-install-rb-default:
	@$(NULLCMD)
$(TIMESTAMP_DIR)/.sitearchdir.time:
	$(Q) $(MAKEDIRS) $(@D) $(RUBYARCHDIR)
	$(Q) $(TOUCH) $@

site-install: site-install-so site-install-rb
site-install-so: install-so
site-install-rb: install-rb

.SUFFIXES: .c .m .cc .mm .cxx .cpp .o .S

.cc.o:
	$(ECHO) compiling $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.cc.S:
	$(ECHO) translating $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

.mm.o:
	$(ECHO) compiling $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.mm.S:
	$(ECHO) translating $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

.cxx.o:
	$(ECHO) compiling $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.cxx.S:
	$(ECHO) translating $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

.cpp.o:
	$(ECHO) compiling $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.cpp.S:
	$(ECHO) translating $(<)
	$(Q) $(CXX) $(INCFLAGS) $(CPPFLAGS) $(CXXFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

.c.o:
	$(ECHO) compiling $(<)
	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.c.S:
	$(ECHO) translating $(<)
	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

.m.o:
	$(ECHO) compiling $(<)
	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(COUTFLAG)$@ -c $(CSRCFLAG)$<

.m.S:
	$(ECHO) translating $(<)
	$(Q) $(CC) $(INCFLAGS) $(CPPFLAGS) $(CFLAGS) $(COUTFLAG)$@ -S $(CSRCFLAG)$<

$(TARGET_SO): $(OBJS) Makefile
	$(ECHO) linking shared-object $(DLLIB)
	-$(Q)$(RM) $(@)
	$(Q) $(LDSHARED) -o $@ $(OBJS) $(LIBPATH) $(DLDFLAGS) $(LOCAL_LIBS) $(LIBS)
	$(Q) $(POSTLINK)



###
dict.o: dict.c dict.h
rbtree.o: rbtree.c dict.h

[bf4]

Well, that's embarrassing. I opened a new terminal session and was able to compile.

📝 $ ruby extconf.rb
checking for ruby/version.h... yes
checking for rb_exec_recursive() in ruby.h... yes
checking for rb_exec_recursive_paired() in ruby.h... yes
checking for rb_proc_lambda_p() in ruby.h... yes
checking for rb_ary_resize() in ruby.h... yes
checking for rb_obj_hide() in ruby.h... yes
checking for rb_safe_level() in ruby.h... no
checking for rb_cData() in ruby.h... yes
creating Makefile

📝 $ make
compiling rbtree.c
rbtree.c:1950:9: warning: 'rb_cData' is deprecated: by: rb_cObject.  Will be removed in 3.1. [-Wdeprecated-declarations]
        rb_cData
        ^
/Users/osxuser/.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/internal/core/rdata.h:394:18: note: expanded from macro 'rb_cData'
#define rb_cData rb_cData()
                 ^
/Users/osxuser/.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/internal/core/rdata.h:372:1: note: 'rb_cData' has been explicitly marked deprecated here
RBIMPL_ATTR_DEPRECATED(("by: rb_cObject.  Will be removed in 3.1."))
^
/Users/osxuser/.rbenv/versions/3.1.2/include/ruby-3.1.0/ruby/internal/attr/deprecated.h:36:53: note: expanded from macro 'RBIMPL_ATTR_DEPRECATED'
# define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
                                                    ^
1 warning generated.
linking shared-object rbtree.bundle
ld: warning: ignoring file '/Users/osxuser/code/server/.bundle/vendor/ruby/3.1.0/bundler/gems/rbtree-4735a3a5f330/dict.o': found architecture 'x86_64', required architecture 'arm64'