Build Ruby without libgmp on macOS - #253
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nmburgan
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Has the internal implementation and known issues? Is it worth building our own libgmp for MacOS? |
The macOS runners come with a Homebrew-provided `libgmp` installed in
`/usr/local/opt/`. This library is required by the `ruby-build` Ruby
that run Vanagon builds. However, this `libgmp` is specifically built
for macOS 26.0. The Ruby build in `puppet-runtime` finds this library
during `./configure` and the following warning message is generated:
ld: warning: building for macOS-13.0, but linking with dylib '/usr/local/opt/gmp/lib/libgmp.10.dylib' which was built for newer version 26.0
Oddly, the presence of _something_ being printed to stderr causes
`./configure` to alter its logic and the resulting Ruby builds fail.
This commit adds `--without-gmp` to the configure args for macOS so
that the Homebrew library is ignored. The resulting configuration
still supports arbitrary-precision arithmatic as Ruby's `Bignum` uses
an internal implementation instead of `libgmp`.
Signed-off-by: Charlie Sharpsteen <charlie@overlookinfratech.com>
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I believe the internal implementation is less performant, but otherwise correct. The https://github.com/spinel-coop/rv-ruby/blob/20260723/Abstract/rv-ruby.rb#L111 |
bastelfreak
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Sep 1, 2026
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Short description
The macOS runners come with a Homebrew-provided
libgmpinstalled in/usr/local/opt/. This library is required by theruby-buildRuby that run Vanagon builds. However, thislibgmpis specifically built for macOS 26.0. The Ruby build inpuppet-runtimefinds this library during./configureand the following warning message is generated:Oddly, the presence of something being printed to stderr causes
./configureto alter its logic and the resulting Ruby builds fail.This commit adds
--without-gmpto the configure args for macOS so that the Homebrew library is ignored. The resulting configuration still supports arbitrary-precision arithmatic as Ruby'sBignumuses an internal implementation instead oflibgmp.Checklist
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