Auto merge of rust-lang#132434 - tgross35:f128-tests, r=<try>

Enable f128 tests on all non-buggy platforms 🎉

With the `compiler-builtins` update to 0.1.137 [1], we now provide symbols necessary to work with `f128` everywhere. This means that we are no longer restricted to 64-bit linux, and can enable tests by default.

There are still a handful of platforms that need to remain disabled because of bugs.

Math support is still off by default since those symbols are not yet available.

[1]: rust-lang#132433

try-job: arm-android
try-job: armhf-gnu
try-job: i686-gnu
try-job: x86_64-apple-1
try-job: i686-mingw
try-job: x86_64-msvc-ext

Author: bors

library/Cargo.lock

@@ -61,9 +61,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.134"
+version = "0.1.137"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f743e6f7410a78c261505c729f389583de40eec62332cc8cdf2c8b9bf73049a"
+checksum = "12ca24dd460d0e3d28cc55e2d6a1bfe84e03577bc9e43b2d96d86ccd26ab7b91"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",

library/alloc/Cargo.toml

@@ -10,7 +10,7 @@ edition = "2021"
 
 [dependencies]
 core = { path = "../core" }
-compiler_builtins = { version = "0.1.134", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "=0.1.137", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]
 rand = { version = "0.8.5", default-features = false, features = ["alloc"] }

library/std/Cargo.toml

@@ -17,7 +17,7 @@ cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core", public = true }
-compiler_builtins = { version = "0.1.134" }
+compiler_builtins = { version = "=0.1.137" }
 unwind = { path = "../unwind" }
 hashbrown = { version = "0.15", default-features = false, features = [
     'rustc-dep-of-std',

library/std/build.rs

@@ -131,10 +131,10 @@ fn main() {
         ("sparc", _) => false,
         // MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054>
         ("x86_64", "windows") if target_env == "gnu" && target_abi != "llvm" => false,
-        // 64-bit Linux is about the only platform to have f128 symbols by default
-        (_, "linux") if target_pointer_width == 64 => true,
-        // Almost all OSs are missing symbol. compiler-builtins will have to add them.
-        _ => false,
+        // There are no known problems on other platforms, so the only requirement is that symbols
+        // are available. `compiler-builtins` provides all symbols required for core `f128`
+        // support, so this should work for everything else.
+        _ => true,
     };
 
     // Configure platforms that have reliable basics but may have unreliable math.

src/tools/tidy/src/deps.rs

@@ -24,6 +24,7 @@ const LICENSES: &[&str] = &[
     "BSD-2-Clause OR Apache-2.0 OR MIT",                   // zerocopy
     "ISC",
     "MIT / Apache-2.0",
+    "MIT AND Apache-2.0 WITH LLVM-exception AND (MIT OR Apache-2.0)", // compiler-builtins
     "MIT OR Apache-2.0 OR LGPL-2.1-or-later",              // r-efi, r-efi-alloc
     "MIT OR Apache-2.0 OR Zlib",                           // tinyvec_macros
     "MIT OR Apache-2.0",