Build Failed on Google Cloud Arm instance

[mohamedhafez]

I am unable to install ruby 3.4.6 or 3.4.7 on my Ubuntu 24.04 machine, running on a google cloud arm instance (c4a-standard-4-lssd). it works just fine on my AWS ec2 arm instance, so i wonder if its an issue with the google cloud instance somehow. I'm getting a message about a missing -arch in the build log:

RuntimeError: missing -arch
  <main> at ./tool/mkconfig.rb:14

Full build log here

I'm using rbenv and ruby-build, the latest commits as of this writing (c8e87be3089fdcc471adc985ac4c04de082911ab and da5bb28)

uname -a
Linux xxxx.c.able-study-xxxxx.internal 6.14.0-1017-gcp #18~24.04.1-Ubuntu SMP Tue Sep 23 17:43:54 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux

I don't have any weird flags set:

web@dbv:~$ env | egrep '^(ARCHFLAGS|RUBYOPT|CONFIGURE_OPTS|RUBY_CONFIGURE_OPTS|CFLAGS|LDFLAGS)='
web@dbv:~$ 

I've installed all the packages described in the Ubuntu section of https://github.com/rbenv/ruby-build/wiki#suggested-build-environment, both for latest stable versions and older stable versions

[hsbt]

Have you tried it with Ruby 3.4.5? Did it work correctly?

[mohamedhafez]

3.4.5 had the same behavior as 3.4.7, but i got them to work by removing JRuby as described below!

[mohamedhafez]

AHA! I noticed this line:

* BASERUBY -v:         jruby 10.0.2.0 (3.4.2) 2025-08-07 cba6031bd0 \
                          OpenJDK 64-Bit Server VM 21.0.8+9-LTS on \
                          21.0.8+9-LTS +indy +jit [aarch64-linux]

JRuby 10.0.2.0 was the only ruby installed on the machine, and it was made global. I deleted it, and then installing 3.4.7 worked!

[hsbt]

Thanks for your additional report. I'm glad the problem seems to have been resolved.

[mislav]

Thanks for sharing! I've updated the wiki with this information https://github.com/rbenv/ruby-build/wiki#runtimeerror-missing--arch

[mohamedhafez]

Thanks @mislav! if there's any option to run without a base ruby, perhaps that would be useful to add to the wiki, for people that only have JRuby installed and no system ruby, which was my case initially

[mislav]

@mohamedhafez Reading the Ruby ./configure script, it should be possible to pass --with-baseruby=no; can you try that? If that works, please add that to the wiki section.

It's also possible that --without-baseruby is the same as --with-baseruby=no, but I haven't verified it.

[mohamedhafez]

@mislav Done! --without-baseruby does indeed work