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-rw-r--r--bootstrap.example.toml7
1 files changed, 5 insertions, 2 deletions
diff --git a/bootstrap.example.toml b/bootstrap.example.toml
index ebab2e14828..16fd9241a17 100644
--- a/bootstrap.example.toml
+++ b/bootstrap.example.toml
@@ -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`.