Rollup merge of rust-lang#58080 - MikaelUrankar:freebsd_arm, r=sanxiyn

Add FreeBSD armv6 and armv7 targets

Author: pietroalbini

src/bootstrap/bootstrap.py

@@ -262,6 +262,10 @@ def default_build_triple():
         cputype = 'arm'
         if ostype == 'linux-android':
             ostype = 'linux-androideabi'
+        elif ostype == 'unknown-freebsd':
+            cputype = subprocess.check_output(
+                ['uname', '-p']).strip().decode(default_encoding)
+            ostype = 'unknown-freebsd'
     elif cputype == 'armv6l':
         cputype = 'arm'
         if ostype == 'linux-android':

src/librustc_target/spec/armv6_unknown_freebsd.rs

@@ -0,0 +1,24 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let base = super::freebsd_base::opts();
+    Ok(Target {
+        llvm_target: "armv6-unknown-freebsd-gnueabihf".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "freebsd".to_string(),
+        target_env: "gnueabihf".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+
+        options: TargetOptions {
+            features: "+v6,+vfp2".to_string(),
+            max_atomic_width: Some(64),
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            .. base
+        }
+    })
+}

src/librustc_target/spec/armv7_unknown_freebsd.rs

@@ -0,0 +1,24 @@
+use crate::spec::{LinkerFlavor, Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let base = super::freebsd_base::opts();
+    Ok(Target {
+        llvm_target: "armv7-unknown-freebsd-gnueabihf".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64".to_string(),
+        arch: "arm".to_string(),
+        target_os: "freebsd".to_string(),
+        target_env: "gnueabihf".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+
+        options: TargetOptions {
+            features: "+v7,+vfp3,+d16,+thumb2,-neon".to_string(),
+            max_atomic_width: Some(64),
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            .. base
+        }
+    })
+}

src/librustc_target/spec/mod.rs

@@ -376,6 +376,8 @@ supported_targets! {
     ("aarch64-linux-android", aarch64_linux_android),
 
     ("aarch64-unknown-freebsd", aarch64_unknown_freebsd),
+    ("armv6-unknown-freebsd", armv6_unknown_freebsd),
+    ("armv7-unknown-freebsd", armv7_unknown_freebsd),
     ("i686-unknown-freebsd", i686_unknown_freebsd),
     ("powerpc64-unknown-freebsd", powerpc64_unknown_freebsd),
     ("x86_64-unknown-freebsd", x86_64_unknown_freebsd),