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Enable adding Ubuntu toolchain PPA by default#555

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Flamefire wants to merge 1 commit intoboostorg:developfrom
Flamefire:add-toolchain-ppa
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Enable adding Ubuntu toolchain PPA by default#555
Flamefire wants to merge 1 commit intoboostorg:developfrom
Flamefire:add-toolchain-ppa

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@Flamefire
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The default in Boost.CI will be false but some jobs still rely on this, so keep it for now the default.

The default in Boost.CI will be false but some jobs still rely on this, so keep it for now the default.
@klemens-morgenstern
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I have no idea what this does, can you give me the cliff notes?

@Flamefire
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Flamefire commented May 5, 2026

This was a recent Slack discussion: Basically:
Boost.CI adds the ubuntu-toolchain-r/test PPA by default.
This allows installing older or newer compilers than available on the base Ubuntu image

However this is bad for 2 reasons:

  • System packages are preferred, so mostly another OS image should be used
  • The PPA download takes time and may fail even when it isn't actually used.

The best way is to copy the updated one from https://github.com/boostorg/boost-ci

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