Cannot install `github-linguist` on Mac OS 15.3 when using `rbenv` and Ruby@3.4.2

[joe307bad]

I have read the section in the README that suggests using a Ruby version manager on Mac OS. So I installed rbenv via Homebrew and I also installed the dependencies using this command:

brew install cmake pkg-config icu4c

But after using rbenv and installing the dependencies and switching back and forth from Ruby 3.4.1 and 3.4.2 using rbenv, I still get the error listed below.

Here is my system info

Apple M3 Pro
Mac OS 15.3 (24D60)

Describe the bug

I am trying to install github-linguist and I am getting an error when running gem install github-linguist

joebad@Mac ~ % sudo gem install github-linguist
Password:
Building native extensions. This could take a while...
ERROR:  Error installing github-linguist:
        ERROR: Failed to build gem native extension.

    current directory: /Library/Ruby/Gems/2.6.0/gems/charlock_holmes-0.7.9/ext/charlock_holmes
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20250317-43518-hnpadw.rb extconf.rb
checking for -licui18n... yes
checking for unicode/ucnv.h... yes
checking for -lz... yes
checking for -licuuc... yes
checking for -licudata... yes
checking for icu that requires explicit C++ version flag... yes
checking for icu that compiles with c++20 standard... no
checking for icu that compiles with c++17 standard... no
checking for icu that compiles with c++11 standard... no
checking for icu that compiles with c++0x standard... no
Cannot compile icu with your compiler: recent versions require C++17 support.
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/$(RUBY_BASE_NAME)
        --with-icu-dir
        --without-icu-dir
        --with-icu-include
        --without-icu-include=${icu-dir}/include
        --with-icu-lib
        --without-icu-lib=${icu-dir}/lib
        --with-icu-i18n-config
        --without-icu-i18n-config
        --with-pkg-config
        --without-pkg-config
        --with-icu-io-config
        --without-icu-io-config
        --with-icu-uc-config
        --without-icu-uc-config
        --with-icui18nlib
        --without-icui18nlib
        --with-zlib
        --without-zlib
        --with-icuuclib
        --without-icuuclib
        --with-icudatalib
        --without-icudatalib

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-24/2.6.0/charlock_holmes-0.7.9/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Library/Ruby/Gems/2.6.0/gems/charlock_holmes-0.7.9 for inspection.
Results logged to /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-24/2.6.0/charlock_holmes-0.7.9/gem_make.out

Expected behaviour

Installing and using github-linguist