This is a developer-only feature, so it's gated via `HOMEBREW_DEVELOPER`.
This is intended to enable testing of macOS 10.15; users building software
manually to test compatibility of early betas need to be able to build
software from source instead of via pouring 10.14 bottles. This isn't
intended to be a general-purpose `HOMEBREW_BUILD_FROM_SOURCE` replacement,
and has no effect on released versions of macOS.
- I tried to install `keybase`, thinking I'd get the CLI. On Linux,
casks don't work, yet I was still prompted to `brew cask install
keybase`. When I tried that (just to make sure), I got the "casks are
only supported on MacOS" error.
- This change makes it so we don't prompt people to install casks if
they're on platforms other than MacOS.
Before:
```
╭─issyl0@grus /home/linuxbrew/.linuxbrew/Homebrew ‹master›
╰─ $ brew install keybase
Error: No available formula with the name "keybase"
Found a cask named "keybase" instead.
```
After:
```
Error: No available formula with the name "keybase"
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
git -C "$(brew --repo homebrew/core)" fetch --unshallow
Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.
```
- Accelerate provides more than just BLAS and LAPACK functionality, see
https://developer.apple.com/documentation/accelerate
- Veclibfort exists only to wrap Accelerate's BLAS/LAPACK
- LAPACK is a slow, seldom updated reference implementation
- Encourage usage of OpenBLAS
- Reverts PR #6130
- veclibfort exists soley to wrap Apple's accelerate and provide BLAS/LAPACK
access to Accelerate
- Improve the help message for that audit to mention veclibfort
Recent commit 36dbad3922 to default to frozen string literals (via `frozen_string_literal`) broke `check_for_unsupported_macos()` on outdated releases--due to attempted modification of a frozen string literal.
This breaks `install` and `doctor`.
It's like the change wasn't tested on an unsupported outdated release or something... :D
Adding a `+` prefix is apparently one way around this issue according to https://stackoverflow.com/questions/37799296/what-does-the-comment-frozen-string-literal-true-do#37799399. The change worked for me.
Combined with https://github.com/Homebrew/homebrew-test-bot/pull/247
this will test Homebrew's use of frozen strings in CI. After this we
will then enable it for Homebrew developers and eventually all Homebrew
users.
