Add i686-unknown-openbsd target.

mk/cfg/i686-unknown-openbsd.mk

@@ -0,0 +1,24 @@
+# i686-unknown-openbsd configuration
+CC_i686-unknown-openbsd=$(CC)
+CXX_i686-unknown-openbsd=$(CXX)
+CPP_i686-unknown-openbsd=$(CPP)
+AR_i686-unknown-openbsd=$(AR)
+CFG_LIB_NAME_i686-unknown-openbsd=lib$(1).so
+CFG_STATIC_LIB_NAME_i686-unknown-openbsd=lib$(1).a
+CFG_LIB_GLOB_i686-unknown-openbsd=lib$(1)-*.so
+CFG_LIB_DSYM_GLOB_i686-unknown-openbsd=$(1)-*.dylib.dSYM
+CFG_JEMALLOC_CFLAGS_i686-unknown-openbsd := -m32 -I/usr/include $(CFLAGS)
+CFG_GCCISH_CFLAGS_i686-unknown-openbsd :=  -g -fPIC -m32 -I/usr/include $(CFLAGS)
+CFG_GCCISH_LINK_FLAGS_i686-unknown-openbsd := -shared -fPIC -g -pthread -m32
+CFG_GCCISH_DEF_FLAG_i686-unknown-openbsd := -Wl,--export-dynamic,--dynamic-list=
+CFG_LLC_FLAGS_i686-unknown-openbsd :=
+CFG_INSTALL_NAME_i686-unknown-openbsd =
+CFG_EXE_SUFFIX_i686-unknown-openbsd :=
+CFG_WINDOWSY_i686-unknown-openbsd :=
+CFG_UNIXY_i686-unknown-openbsd := 1
+CFG_LDPATH_i686-unknown-openbsd :=
+CFG_RUN_i686-unknown-openbsd=$(2)
+CFG_RUN_TARG_i686-unknown-openbsd=$(call CFG_RUN_i686-unknown-openbsd,,$(2))
+CFG_GNU_TRIPLE_i686-unknown-openbsd := i686-unknown-openbsd
+RUSTC_FLAGS_i686-unknown-openbsd=-C linker=$(call FIND_COMPILER,$(CC))
+CFG_DISABLE_JEMALLOC_i686-unknown-openbsd := 1

src/librustc_back/target/i686_unknown_openbsd.rs

@@ -0,0 +1,30 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use target::{Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::openbsd_base::opts();
+    base.cpu = "pentium4".to_string();
+    base.max_atomic_width = Some(64);
+    base.pre_link_args.push("-m32".to_string());
+
+    Ok(Target {
+        llvm_target: "i686-unknown-openbsd".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        data_layout: "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128".to_string(),
+        arch: "x86".to_string(),
+        target_os: "openbsd".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "unknown".to_string(),
+        options: base,
+    })
+}

src/librustc_back/target/mod.rs

@@ -168,7 +168,10 @@ supported_targets! {
     ("x86_64-unknown-dragonfly", x86_64_unknown_dragonfly),
 
     ("x86_64-unknown-bitrig", x86_64_unknown_bitrig),
+
+    ("i686-unknown-openbsd", i686_unknown_openbsd),
     ("x86_64-unknown-openbsd", x86_64_unknown_openbsd),
+
     ("x86_64-unknown-netbsd", x86_64_unknown_netbsd),
     ("x86_64-rumprun-netbsd", x86_64_rumprun_netbsd),