Rollup of 10 pull requests

compiler/rustc_target/src/spec/base/dragonfly.rs

@@ -8,6 +8,7 @@ pub fn opts() -> TargetOptions {
         has_rpath: true,
         position_independent_executables: true,
         relro_level: RelroLevel::Full,
+        has_thread_local: true,
         default_dwarf_version: 2,
         ..Default::default()
     }

compiler/rustc_target/src/spec/base/freebsd.rs

@@ -9,6 +9,7 @@ pub fn opts() -> TargetOptions {
         crt_static_respected: true,
         position_independent_executables: true,
         relro_level: RelroLevel::Full,
+        has_thread_local: true,
         abi_return_struct_as_int: true,
         default_dwarf_version: 2,
         ..Default::default()

compiler/rustc_target/src/spec/base/netbsd.rs

@@ -9,6 +9,7 @@ pub fn opts() -> TargetOptions {
         has_rpath: true,
         position_independent_executables: true,
         relro_level: RelroLevel::Full,
+        has_thread_local: true,
         use_ctors_section: true,
         default_dwarf_version: 2,
         ..Default::default()

library/std/src/sys/pal/unix/thread_local_dtor.rs

@@ -17,7 +17,10 @@
     target_os = "android",
     target_os = "fuchsia",
     target_os = "redox",
-    target_os = "hurd"
+    target_os = "hurd",
+    target_os = "freebsd",
+    target_os = "netbsd",
+    target_os = "dragonfly"
 ))]
 // FIXME: The Rust compiler currently omits weakly function definitions (i.e.,
 // __cxa_thread_atexit_impl) and its metadata from LLVM IR.