Accessing the path of the base compiler behind the shim

[tdavidcl]

Output of brew config

HOMEBREW_VERSION: 4.4.17
ORIGIN: https://github.com/Homebrew/brew
HEAD: 55f399c10dc7e6cc07497bdfccdecc96329e3b57
Last commit: 26 hours ago
Branch: stable
Core tap HEAD: ca117c175ba3195dd041bd8160d6b09bfe3cd95c
Core tap last commit: 31 minutes ago
Core tap branch: init-package-acpp
Core tap JSON: 20 Jan 22:47 UTC
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
HOMEBREW_BROWSER: /vscode/bin/linux-x64/91fbdddc47bc9c09064bf7acf133d22631cbf083/bin/helpers/browser.sh
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 2
Homebrew Ruby: 3.3.4 => /usr/local/rvm/rubies/ruby-3.3.4/bin/ruby
CPU: dual-core 64-bit icelake
Clang: 19.1.7
Git: 2.25.1 => /bin/git
Curl: 7.68.0 => /bin/curl
Kernel: Linux 6.5.0-1025-azure x86_64 GNU/Linux
OS: Ubuntu 20.04.6 LTS (focal)
Host glibc: 2.31
/usr/bin/gcc: 9.4.0
/usr/bin/ruby: N/A
glibc: 2.35_1
gcc@11: N/A
gcc: 14.2.0_1
xorg: N/A

Output of brew doctor

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Warning: You have an unnecessary local Core tap!
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 brew untap homebrew/core

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Uncommitted files:
  ?? Formula/a/adaptivecpp.rb

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Description of issue

Hi,

I'm currently writing a Formula for AdaptiveCpp which is a compiler for SYCL.

In its install phase it register in a database the path of the compiler used to build it.
The issue is that when packaging AdaptiveCpp with homebrew it registers the path to the shim (e.g. something like /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/shims/linux/super/g++).
This is of course not intended in the resulting formula, therefore, I'm looking for a way to access the underlying compiler behind the shim to register it instead.
On MacOS i'm trying to use xcrun to bypass the provided compiler but this is a bit sketchy ...

Thanks

[p-linnane]

Here are 32 formulae that we have workaround to remove references to the shims: https://github.com/search?q=repo%3AHomebrew%2Fhomebrew-core+%22Homebrew+shims%22&type=code. That may help for inspiration.