ruby.git/ext/psych/extconf.rb, branch v4.0.4

[ruby/psych] Remove warning by not calling find_library after pkg_config

2025-09-24T05:55:26+00:00

If pkg_config returns a truthy value, it found the library and added it
to the global values for the Makefile.

Calling `find_library` after a successful `pkg_config` causes -lyaml to
appear twice in the LIBS variable in the resulting Makefile, and causes
ld on macOS to emit a warning:

    $ bundle exec rake compile 2>&1 | grep warning
    ld: warning: ignoring duplicate libraries: '-lyaml'

https://github.com/ruby/psych/commit/cb5e3d465c

[ruby/psych] configure of libyaml couldn't detect "arm64-apple-darwin22" for build host.

2023-01-17T08:26:22+00:00

  checking whether make sets $(MAKE)... (cached) yes
  checking build system type... arm-apple-darwin21.6.0
  checking host system type... Invalid configuration `arm64-apple-darwin21': machine `arm64-apple' not recognized
  configure: error: /bin/sh /Users/hsbt/Downloads/yaml-0.2.5/config/config.sub arm64-apple-darwin21 failed
  *** extconf.rb failed ***

https://github.com/ruby/psych/commit/ad1502202c

[ruby/psych] Fix missing `abort` call

2022-10-12T11:24:38+00:00

https://github.com/ruby/psych/commit/de2b98c7b7

Co-authored-by: Olle Jonsson

[ruby/psych] Abandon when libyaml is not found

2022-10-12T11:24:37+00:00

https://github.com/ruby/psych/commit/0b89eda398

[ruby/psych] Removed the related condition of --enable-bundled-libyaml

2022-10-07T03:55:31+00:00

https://github.com/ruby/psych/commit/7c211a43c1

[ruby/psych] --enable-bundled-libyaml config has been removed

2022-10-07T03:55:30+00:00

https://github.com/ruby/psych/commit/447d372dcd

Removed the related files for downloading with extlibs

2022-10-05T09:22:06+00:00

[ruby/psych] Fix libyaml download failure rescue under miniruby

2022-06-14T16:05:51+00:00

I tried to build Ruby on a system without libyaml today and realized
that my attempt from  doesn't
fix the error in . I still got
the same `LoadError` from `digest` which stopped the build.

Since `LoadError` is not a `StandardError`, a plain `rescue` doesn't catch
it. Catch `LoadError` explicitly instead and reduce the scope of the
`begin` block.

I tested this change in a Ruby build on macOS without libyaml installed
and confirmed that `make` continues with a warning instead of aborting:

    *** Following extensions are not compiled:
    psych:
            Could not be configured. It will not be installed.
            ...

This should address .

https://github.com/ruby/psych/commit/251289ba83

[ruby/psych] Improve libyaml source downloading error messages

2022-04-04T23:56:21+00:00

People trying to build CRuby by following the instructions in its
[README] have been running into [errors] due to missing `libyaml`
on their system. Let's try to present a better error message when
it happens.

[README]: https://github.com/ruby/ruby/tree/fb5aa31e2d20ea8e1425432672f4de4c8ca2c26b#how-to-compile-and-install
[errors]: https://github.com/ruby/psych/issues/552

https://github.com/ruby/psych/commit/20a633028e

[ruby/psych] Propagate `CC` to libyaml

2022-04-04T07:06:16+00:00

It is needed for cross-compiling to set properly.  Just
`--target`/`--host`/`--build` seems insufficient on some
platforms.

https://github.com/ruby/psych/commit/2d00c0c203