Build rules_perl for ppc64le.

[Sunidhi-Gaonkar1]

Hello team,
We are working on building ray on Power architecture and it has a dependency on rules_perl. There is no perl tarball released for Power by relocatable_perl.
Is there a way to use system installed perl instead of fetching it from relocatable_perl? Any pointers will be helpful. Thank you.

[skeletonkey]

It's been a while since I've done something like this and Bazel has changed, but I believe you can do this by using a genrule like:

genrule(
    name = "my_perl_rule",
    srcs = ["my_script.pl"],
    outs = ["output.txt"],
    tools = ["/usr/bin/perl"],  # Path to your host's Perl interpreter
    cmd = "$(location :perl) $(location my_script.pl) > $@",
)

This requires that each system you are running this on has the same location of Perl, preferably the same version of Perl, and all required modules are installed for that version.

[Sunidhi-Gaonkar1]

@skeletonkey , Thank you for your response and sorry for the delayed reply. facing the following issue after using genrule.

:/rules_perl# bazel build :all
ERROR: /rules_perl/BUILD:19:8: //:my_perl_rule: invalid label '/usr/bin/perl' in element 0 of attribute 'tools' in 'genrule' rule: invalid target name '/usr/bin/perl': target names may not start with '/'
ERROR: package contains errors: : //:my_perl_rule: invalid label '/usr/bin/perl' in element 0 of attribute 'tools' in 'genrule' rule: invalid target name '/usr/bin/perl': target names may not start with '/'

Looking into it further, if you have any suggestions please let me know. Thank you.