Installation fail à cause de bigdecimal Ruby 2.6.2

[chaibax]

En suivant le readme, au moment du bundle install j'ai une erreur avec bigdecimal

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/Users/chaibpro/.gem/gems/bigdecimal-2.0.0/ext/bigdecimal
/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
./siteconf20210105-85252-5wl4ks.rb extconf.rb
checking RUBY_BIGDECIMAL_VERSION... 2.0.0
checking for labs() in stdlib.h... *** 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)
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:467:in
`try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:546:in
`block in try_link0'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/tmpdir.rb:93:in
`mktmpdir'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:543:in
`try_link0'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:570:in
`try_link'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:782:in
`try_func'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:1069:in
`block in have_func'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:959:in
`block in checking_for'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:361:in
`block (2 levels) in postpone'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:331:in
`open'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:361:in
`block in postpone'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:331:in
`open'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:357:in
`postpone'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:958:in
`checking_for'
from
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:1068:in
`have_func'
        from extconf.rb:31:in `<main>'

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

/Users/chaibpro/.gem/extensions/universal-darwin-20/2.6.0/bigdecimal-2.0.0/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/chaibpro/.gem/gems/bigdecimal-2.0.0
for inspection.
Results logged to
/Users/chaibpro/.gem/extensions/universal-darwin-20/2.6.0/bigdecimal-2.0.0/gem_make.out

An error occurred while installing bigdecimal (2.0.0), and Bundler
cannot continue.
Make sure that `gem install bigdecimal -v '2.0.0' --source
'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  jsonlint was resolved to 0.3.0, which depends on
    oj was resolved to 3.10.12, which depends on
      bigdecimal

Le souci semble connu. Je suis passé à Ruby 2.6.4 (au lieu de 2.6.2) pour régler le problème.
Ça semble bien marcher en local. Mais étant néophyte avec Ruby, je ne sais pas s'il y a des effets de bords.

A la base j'ai mis la 2.6.2 qui était dans .ruby-version

[Morendil]

@chaibax Ca ne devrait pas être très sensible à la version de Ruby…