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Refactor *.optimized-compiler-builtins bootstrap options

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Create a dedicated enum to abstract the different ways compiler-builtins
can be configured.

This also relaxes build.optimized-compiler-builtins to accept the path
of a library to match the behavior of <target>.optimized-compiler-builtins
override.
This commit is contained in:
Paul Murphy 2025-08-20 11:19:49 -05:00
parent 64cbe52849
commit 148a07cbd0
9 changed files with 71 additions and 36 deletions
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7
bootstrap.example.toml
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@ -407,8 +407,11 @@
#build.profiler = false
# Use the optimized LLVM C intrinsics for `compiler_builtins`, rather than Rust intrinsics.
# Requires the LLVM submodule to be managed by bootstrap (i.e. not external) so that `compiler-rt`
# sources are available.
# Choosing true requires the LLVM submodule to be managed by bootstrap (i.e. not external)
# so that `compiler-rt` sources are available.
#
# Setting this to a path removes the requirement for a C toolchain, but requires setting the
# path to an existing library containing the builtins library from LLVM's compiler-rt.
#
# Setting this to `false` generates slower code, but removes the requirement for a C toolchain in
# order to run `x check`.