Auto merge of rust-lang#141208 - fmease:rollup-zdzvg6u, r=fmease

Rollup of 6 pull requests

Successful merges:

 - rust-lang#127013 (Add `f16` formatting and parsing)
 - rust-lang#140154 (Cygwin support in rustc)
 - rust-lang#140628 (std: stop using TLS in signal handler)
 - rust-lang#140966 (Remove #![feature(let_chains)] from library and src/librustdoc)
 - rust-lang#140994 (replace `cc_detect::cc2ar` with `cc::try_get_archiver`)
 - rust-lang#141127 (bump windows crate for compiler,bootstrap and tools)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -738,7 +738,7 @@ dependencies = [
  "tracing-subscriber",
  "unified-diff",
  "walkdir",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -1587,7 +1587,7 @@ dependencies = [
  "js-sys",
  "log",
  "wasm-bindgen",
- "windows-core 0.61.0",
+ "windows-core",
 ]
 
 [[package]]
@@ -3493,7 +3493,7 @@ dependencies = [
  "thorin-dwp",
  "tracing",
  "wasm-encoder 0.219.2",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3552,7 +3552,7 @@ dependencies = [
  "tempfile",
  "thin-vec",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3615,7 +3615,7 @@ dependencies = [
  "shlex",
  "stable_mir",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -3670,7 +3670,7 @@ dependencies = [
  "termcolor",
  "termize",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -4415,7 +4415,7 @@ dependencies = [
  "smallvec",
  "termize",
  "tracing",
- "windows 0.59.0",
+ "windows",
 ]
 
 [[package]]
@@ -5102,7 +5102,7 @@ dependencies = [
  "libc",
  "objc2-core-foundation",
  "objc2-io-kit",
- "windows 0.61.1",
+ "windows",
 ]
 
 [[package]]
@@ -6002,24 +6002,14 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows"
-version = "0.59.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f919aee0a93304be7f62e8e5027811bbba96bcb1de84d6618be56e43f8a32a1"
-dependencies = [
- "windows-core 0.59.0",
- "windows-targets 0.53.0",
-]
-
 [[package]]
 name = "windows"
 version = "0.61.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c5ee8f3d025738cb02bad7868bbb5f8a6327501e870bf51f1b455b0a2454a419"
 dependencies = [
  "windows-collections",
- "windows-core 0.61.0",
+ "windows-core",
  "windows-future",
  "windows-link",
  "windows-numerics",
@@ -6042,20 +6032,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3beeceb5e5cfd9eb1d76b381630e82c4241ccd0d27f1a39ed41b2760b255c5e8"
 dependencies = [
- "windows-core 0.61.0",
-]
-
-[[package]]
-name = "windows-core"
-version = "0.59.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "810ce18ed2112484b0d4e15d022e5f598113e220c53e373fb31e67e21670c1ce"
-dependencies = [
- "windows-implement 0.59.0",
- "windows-interface",
- "windows-result",
- "windows-strings 0.3.1",
- "windows-targets 0.53.0",
+ "windows-core",
 ]
 
 [[package]]
@@ -6064,11 +6041,11 @@ version = "0.61.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4763c1de310c86d75a878046489e2e5ba02c649d185f21c67d4cf8a56d098980"
 dependencies = [
- "windows-implement 0.60.0",
+ "windows-implement",
  "windows-interface",
  "windows-link",
  "windows-result",
- "windows-strings 0.4.0",
+ "windows-strings",
 ]
 
 [[package]]
@@ -6077,21 +6054,10 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a1d6bbefcb7b60acd19828e1bc965da6fcf18a7e39490c5f8be71e54a19ba32"
 dependencies = [
- "windows-core 0.61.0",
+ "windows-core",
  "windows-link",
 ]
 
-[[package]]
-name = "windows-implement"
-version = "0.59.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83577b051e2f49a058c308f17f273b570a6a758386fc291b5f6a934dd84e48c1"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.101",
-]
-
 [[package]]
 name = "windows-implement"
 version = "0.60.0"
@@ -6126,7 +6092,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9150af68066c4c5c07ddc0ce30421554771e528bde427614c61038bc2c92c2b1"
 dependencies = [
- "windows-core 0.61.0",
+ "windows-core",
  "windows-link",
 ]
 
@@ -6139,15 +6105,6 @@ dependencies = [
  "windows-link",
 ]
 
-[[package]]
-name = "windows-strings"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87fa48cc5d406560701792be122a10132491cff9d0aeb23583cc2dcafc847319"
-dependencies = [
- "windows-link",
-]
-
 [[package]]
 name = "windows-strings"
 version = "0.4.0"

compiler/rustc_codegen_ssa/Cargo.toml

@@ -58,5 +58,5 @@ default-features = false
 features = ["read_core", "elf", "macho", "pe", "xcoff", "unaligned", "archive", "write", "wasm"]
 
 [target.'cfg(windows)'.dependencies.windows]
-version = "0.59.0"
+version = "0.61.0"
 features = ["Win32_Globalization"]

compiler/rustc_data_structures/Cargo.toml

@@ -38,7 +38,7 @@ features = ["nightly"] # for may_dangle
 version = "0.12"
 
 [target.'cfg(windows)'.dependencies.windows]
-version = "0.59.0"
+version = "0.61.0"
 features = [
     "Win32_Foundation",
     "Win32_Storage_FileSystem",

compiler/rustc_driver_impl/Cargo.toml

@@ -60,7 +60,7 @@ libc = "0.2"
 # tidy-alphabetical-end
 
 [target.'cfg(windows)'.dependencies.windows]
-version = "0.59.0"
+version = "0.61.0"
 features = [
     "Win32_System_Diagnostics_Debug",
 ]

compiler/rustc_errors/Cargo.toml

@@ -33,7 +33,7 @@ tracing = "0.1"
 # tidy-alphabetical-end
 
 [target.'cfg(windows)'.dependencies.windows]
-version = "0.59.0"
+version = "0.61.0"
 features = [
     "Win32_Foundation",
     "Win32_Security",

compiler/rustc_llvm/build.rs

@@ -255,6 +255,7 @@ fn main() {
     } else if target.contains("haiku")
         || target.contains("darwin")
         || (is_crossed && (target.contains("dragonfly") || target.contains("solaris")))
+        || target.contains("cygwin")
     {
         println!("cargo:rustc-link-lib=z");
     } else if target.contains("netbsd") {

compiler/rustc_pattern_analysis/src/lib.rs

@@ -6,7 +6,6 @@
 #![allow(rustc::diagnostic_outside_of_impl)]
 #![allow(rustc::untranslatable_diagnostic)]
 #![allow(unused_crate_dependencies)]
-#![cfg_attr(all(feature = "rustc", bootstrap), feature(let_chains))]
 // tidy-alphabetical-end
 
 pub mod constructor;

compiler/rustc_session/Cargo.toml

@@ -33,7 +33,7 @@ libc = "0.2"
 # tidy-alphabetical-end
 
 [target.'cfg(windows)'.dependencies.windows]
-version = "0.59.0"
+version = "0.61.0"
 features = [
     "Win32_Foundation",
     "Win32_System_LibraryLoader",

compiler/rustc_session/src/filesearch.rs

@@ -78,10 +78,16 @@ fn current_dll_path() -> Result<PathBuf, String> {
                 if libc::dladdr(addr, &mut info) == 0 {
                     return Err("dladdr failed".into());
                 }
-                if info.dli_fname.is_null() {
-                    return Err("dladdr returned null pointer".into());
-                }
-                let bytes = CStr::from_ptr(info.dli_fname).to_bytes();
+                #[cfg(target_os = "cygwin")]
+                let fname_ptr = info.dli_fname.as_ptr();
+                #[cfg(not(target_os = "cygwin"))]
+                let fname_ptr = {
+                    if info.dli_fname.is_null() {
+                        return Err("dladdr returned null pointer".into());
+                    }
+                    info.dli_fname
+                };
+                let bytes = CStr::from_ptr(fname_ptr).to_bytes();
                 let os = OsStr::from_bytes(bytes);
                 Ok(PathBuf::from(os))
             }

library/core/src/fmt/float.rs

@@ -20,6 +20,8 @@ macro_rules! impl_general_format {
     }
 }
 
+#[cfg(target_has_reliable_f16)]
+impl_general_format! { f16 }
 impl_general_format! { f32 f64 }
 
 // Don't inline this so callers don't use the stack space this function
@@ -231,6 +233,13 @@ macro_rules! floating {
 
 floating! { f32 f64 }
 
+#[cfg(target_has_reliable_f16)]
+floating! { f16 }
+
+// FIXME(f16_f128): A fallback is used when the backend+target does not support f16 well, in order
+// to avoid ICEs.
+
+#[cfg(not(target_has_reliable_f16))]
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Debug for f16 {
     #[inline]
@@ -239,6 +248,33 @@ impl Debug for f16 {
     }
 }
 
+#[cfg(not(target_has_reliable_f16))]
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Display for f16 {
+    #[inline]
+    fn fmt(&self, fmt: &mut Formatter<'_>) -> Result {
+        Debug::fmt(self, fmt)
+    }
+}
+
+#[cfg(not(target_has_reliable_f16))]
+#[stable(feature = "rust1", since = "1.0.0")]
+impl LowerExp for f16 {
+    #[inline]
+    fn fmt(&self, fmt: &mut Formatter<'_>) -> Result {
+        Debug::fmt(self, fmt)
+    }
+}
+
+#[cfg(not(target_has_reliable_f16))]
+#[stable(feature = "rust1", since = "1.0.0")]
+impl UpperExp for f16 {
+    #[inline]
+    fn fmt(&self, fmt: &mut Formatter<'_>) -> Result {
+        Debug::fmt(self, fmt)
+    }
+}
+
 #[stable(feature = "rust1", since = "1.0.0")]
 impl Debug for f128 {
     #[inline]

library/core/src/lib.rs

@@ -101,6 +101,7 @@
 #![feature(bstr)]
 #![feature(bstr_internals)]
 #![feature(cfg_match)]
+#![feature(cfg_target_has_reliable_f16_f128)]
 #![feature(const_carrying_mul_add)]
 #![feature(const_eval_select)]
 #![feature(core_intrinsics)]