Add freebsd support information

compiler/rustc_target/src/spec/targets/powerpc64le_unknown_freebsd.rs

@@ -13,7 +13,7 @@ pub fn target() -> Target {
             description: Some("PPC64LE FreeBSD".into()),
             tier: Some(3),
             host_tools: Some(false),
-            std: Some(false),
+            std: Some(true),
         },
         pointer_width: 64,
         data_layout: "e-m:e-Fn32-i64:64-n32:64".into(),

library/std/src/sys/sync/condvar/futex.rs

@@ -31,19 +31,19 @@ impl Condvar {
     }
 
     pub unsafe fn wait(&self, mutex: &Mutex) {
-        self.wait_optional_timeout(mutex, None);
+        unsafe { self.wait_optional_timeout(mutex, None) };
     }
 
     pub unsafe fn wait_timeout(&self, mutex: &Mutex, timeout: Duration) -> bool {
-        self.wait_optional_timeout(mutex, Some(timeout))
+        unsafe { self.wait_optional_timeout(mutex, Some(timeout)) }
     }
 
     unsafe fn wait_optional_timeout(&self, mutex: &Mutex, timeout: Option<Duration>) -> bool {
         // Examine the notification counter _before_ we unlock the mutex.
         let futex_value = self.futex.load(Relaxed);
 
         // Unlock the mutex before going to sleep.
-        mutex.unlock();
+        unsafe { mutex.unlock() };
 
         // Wait, but only if there hasn't been any
         // notification since we unlocked the mutex.

src/doc/rustc/src/platform-support.md

@@ -99,7 +99,7 @@ target | notes
 `powerpc64le-unknown-linux-gnu` | PPC64LE Linux (kernel 3.10, glibc 2.17)
 `riscv64gc-unknown-linux-gnu` | RISC-V Linux (kernel 4.20, glibc 2.29)
 `s390x-unknown-linux-gnu` | S390x Linux (kernel 3.2, glibc 2.17)
-`x86_64-unknown-freebsd` | 64-bit FreeBSD
+[`x86_64-unknown-freebsd`](platform-support/freebsd.md) | 64-bit FreeBSD
 `x86_64-unknown-illumos` | illumos
 `x86_64-unknown-linux-musl` | 64-bit Linux with musl 1.2.3
 [`x86_64-unknown-netbsd`](platform-support/netbsd.md) | NetBSD/amd64
@@ -165,7 +165,7 @@ target | std | notes
 `i586-unknown-linux-musl` | ✓ | 32-bit Linux w/o SSE, musl 1.2.3 [^x86_32-floats-x87]
 [`i686-linux-android`](platform-support/android.md) | ✓ | 32-bit x86 Android [^x86_32-floats-return-ABI]
 [`i686-pc-windows-gnullvm`](platform-support/pc-windows-gnullvm.md) | ✓ | 32-bit x86 MinGW (Windows 10+), LLVM ABI [^x86_32-floats-return-ABI]
-`i686-unknown-freebsd` | ✓ | 32-bit FreeBSD [^x86_32-floats-return-ABI]
+[`i686-unknown-freebsd`](platform-support/freebsd.md) | ✓ | 32-bit FreeBSD [^x86_32-floats-return-ABI]
 `i686-unknown-linux-musl` | ✓ | 32-bit Linux with musl 1.2.3 [^x86_32-floats-return-ABI]
 [`i686-unknown-uefi`](platform-support/unknown-uefi.md) | ? | 32-bit UEFI
 [`loongarch64-unknown-none`](platform-support/loongarch-none.md) | * | LoongArch64 Bare-metal (LP64D ABI)
@@ -255,7 +255,7 @@ target | std | host | notes
 [`aarch64-nintendo-switch-freestanding`](platform-support/aarch64-nintendo-switch-freestanding.md) | * |  | ARM64 Nintendo Switch, Horizon
 [`aarch64-unknown-teeos`](platform-support/aarch64-unknown-teeos.md) | ? |  | ARM64 TEEOS |
 [`aarch64-unknown-nto-qnx710`](platform-support/nto-qnx.md) | ✓ |  | ARM64 QNX Neutrino 7.1 RTOS |
-`aarch64-unknown-freebsd` | ✓ | ✓ | ARM64 FreeBSD
+[`aarch64-unknown-freebsd`](platform-support/freebsd.md) | ✓ | ✓ | ARM64 FreeBSD
 [`aarch64-unknown-hermit`](platform-support/hermit.md) | ✓ |  | ARM64 Hermit
 `aarch64-unknown-illumos` | ✓ | ✓ | ARM64 illumos
 `aarch64-unknown-linux-gnu_ilp32` | ✓ | ✓ | ARM64 Linux (ILP32 ABI)
@@ -273,13 +273,13 @@ target | std | host | notes
 `armv4t-unknown-linux-gnueabi` | ? |  | Armv4T Linux
 [`armv5te-none-eabi`](platform-support/armv5te-none-eabi.md) | * |  | Bare Armv5TE
 `armv5te-unknown-linux-uclibceabi` | ? |  | Armv5TE Linux with uClibc
-`armv6-unknown-freebsd` | ✓ | ✓ | Armv6 FreeBSD
+[`armv6-unknown-freebsd`](platform-support/freebsd.md) | ✓ | ✓ | Armv6 FreeBSD
 [`armv6-unknown-netbsd-eabihf`](platform-support/netbsd.md) | ✓ | ✓ | Armv6 NetBSD w/hard-float
 [`armv6k-nintendo-3ds`](platform-support/armv6k-nintendo-3ds.md) | ? |  | Armv6k Nintendo 3DS, Horizon (Requires devkitARM toolchain)
 [`armv7-sony-vita-newlibeabihf`](platform-support/armv7-sony-vita-newlibeabihf.md) | ✓ |  | Armv7-A Cortex-A9 Sony PlayStation Vita (requires VITASDK toolchain)
 [`armv7-unknown-linux-uclibceabi`](platform-support/armv7-unknown-linux-uclibceabi.md) | ✓ | ✓ | Armv7-A Linux with uClibc, softfloat
 [`armv7-unknown-linux-uclibceabihf`](platform-support/armv7-unknown-linux-uclibceabihf.md) | ✓ | ? | Armv7-A Linux with uClibc, hardfloat
-`armv7-unknown-freebsd` | ✓ | ✓ | Armv7-A FreeBSD
+[`armv7-unknown-freebsd`](platform-support/freebsd.md) | ✓ | ✓ | Armv7-A FreeBSD
 [`armv7-unknown-netbsd-eabihf`](platform-support/netbsd.md) | ✓ | ✓ | Armv7-A NetBSD w/hard-float
 [`armv7-wrs-vxworks-eabihf`](platform-support/vxworks.md) | ? |  | Armv7-A for VxWorks
 [`armv7a-kmc-solid_asp3-eabi`](platform-support/kmc-solid.md) | ✓ |  | ARM SOLID with TOPPERS/ASP3
@@ -335,9 +335,9 @@ target | std | host | notes
 [`powerpc-unknown-openbsd`](platform-support/powerpc-unknown-openbsd.md) | * |  |
 [`powerpc-wrs-vxworks-spe`](platform-support/vxworks.md) | ? |  |
 [`powerpc-wrs-vxworks`](platform-support/vxworks.md) | ? |  |
-`powerpc64-unknown-freebsd` | ✓ | ✓ | PPC64 FreeBSD (ELFv1 and ELFv2)
-`powerpc64le-unknown-freebsd` |   |   | PPC64LE FreeBSD
-`powerpc-unknown-freebsd` |   |   | PowerPC FreeBSD
+[`powerpc64-unknown-freebsd`](platform-support/freebsd.md) | ✓ | ✓ | PPC64 FreeBSD (ELFv1 and ELFv2)
+[`powerpc64le-unknown-freebsd`](platform-support/freebsd.md) | ✓  |   | PPC64LE FreeBSD
+[`powerpc-unknown-freebsd`](platform-support/freebsd.md) | ✓ |   | PowerPC FreeBSD
 `powerpc64-unknown-linux-musl` | ? |  | 64-bit PowerPC Linux with musl 1.2.3
 `powerpc64-wrs-vxworks` | ? |  |
 `powerpc64le-unknown-linux-musl` | ? |  | 64-bit PowerPC Linux with musl 1.2.3, Little Endian
@@ -352,7 +352,7 @@ target | std | host | notes
 [`riscv32imac-esp-espidf`](platform-support/esp-idf.md) | ✓ |  | RISC-V ESP-IDF
 [`riscv32imafc-esp-espidf`](platform-support/esp-idf.md) | ✓ |  | RISC-V ESP-IDF
 [`riscv64gc-unknown-hermit`](platform-support/hermit.md) | ✓ |   | RISC-V Hermit
-`riscv64gc-unknown-freebsd` |   |   | RISC-V FreeBSD
+[`riscv64gc-unknown-freebsd`](platform-support/freebsd.md) | ✓ |   | RISC-V FreeBSD
 `riscv64gc-unknown-fuchsia` |   |   | RISC-V Fuchsia
 `riscv64gc-unknown-linux-musl` |   |   | RISC-V Linux (kernel 4.20, musl 1.2.3)
 [`riscv64gc-unknown-netbsd`](platform-support/netbsd.md) | ✓ | ✓ | RISC-V NetBSD

src/doc/rustc/src/platform-support/freebsd.md

@@ -0,0 +1,26 @@
+# `*-freebsd`
+
+Support for the FreeBSD operation system.
+
+**Tier: 2 with host tools**
+
+- `x86_64-unknown-freebsd`
+
+**Tier: 2**
+
+- `i686-unknown-freebsd`
+
+**Tier: 3**
+
+- `aarch64-unknown-freebsd`
+- `armv6-unknown-freebsd`
+- `armv7-unknown-freebsd`
+- `powerpc64-unknown-freebsd`
+- `powerpc64le-unknown-freebsd`
+- `riscv64gc-unknown-freebsd`
+
+## Target maintainers
+
+- Alan Somers ([`@asomers`](https://github.com/asomers))
+
+Fallback to rust@FreeBSD.org