From 43e4c074676ec0336c3c39894e2388c171da3015 Mon Sep 17 00:00:00 2001
From: Trevor Gross <tmgross@umich.edu>
Date: Fri, 27 Sep 2024 18:59:52 -0400
Subject: [PATCH] Do not merge: change fallback for testing

---
 library/std/build.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/library/std/build.rs b/library/std/build.rs
index 0278bfcfb08df..f960aa2254e3d 100644
--- a/library/std/build.rs
+++ b/library/std/build.rs
@@ -113,10 +113,9 @@ fn main() {
         ("riscv32" | "riscv64", _) => false,
         // Most OSs are missing `__extendhfsf` and `__truncsfhf`
         (_, "linux" | "macos") => true,
-        // Almost all OSs besides Linux and MacOS are missing symbols until compiler-builtins can
-        // be updated. <https://github.com/rust-lang/rust/pull/125016> will get some of these, the
-        // next CB update should get the rest.
-        _ => false,
+        // TODO: only for testing, this line will wind up changed as part of
+        // <https://github.com/rust-lang/rust/pull/129385>.
+        _ => true,
     };
 
     let has_reliable_f128 = match (target_arch.as_str(), target_os.as_str()) {