Auto merge of #31078 - nbaksalyar:illumos, r=alexcrichton

This pull request adds support for [Illumos](http://illumos.org/)-based operating systems: SmartOS, OpenIndiana, and others. For now it's x86-64 only, as I'm not sure if 32-bit installations are widespread. This PR is based on #28589 by @potatosalad, and also closes #21000, #25845, and #25846.

Required changes in libc are already merged: rust-lang/libc#138

Here's a snapshot required to build a stage0 compiler:
https://s3-eu-west-1.amazonaws.com/nbaksalyar/rustc-sunos-snapshot.tar.gz
It passes all checks from `make check`.

There are some changes I'm not quite sure about, e.g. macro usage in `src/libstd/num/f64.rs` and `DirEntry` structure in `src/libstd/sys/unix/fs.rs`, so any comments on how to rewrite it better would be greatly appreciated.

Also, LLVM configure script might need to be patched to build it successfully, or a pre-built libLLVM should be used. Some details can be found here: https://llvm.org/bugs/show_bug.cgi?id=25409

Thanks!

r? @brson

configure

@@ -1,5 +1,13 @@
 #!/bin/sh
 
+# /bin/sh on Solaris is not a POSIX compatible shell, but /usr/bin/bash is.
+if [ `uname -s` = 'SunOS' -a "${POSIX_SHELL}" != "true" ]; then
+    POSIX_SHELL="true"
+    export POSIX_SHELL
+    exec /usr/bin/env bash $0 "$@"
+fi
+unset POSIX_SHELL # clear it so if we invoke other scripts, they run as bash as well
+
 msg() {
     echo "configure: $*"
 }
@@ -416,6 +424,11 @@ case $CFG_OSTYPE in
         CFG_OSTYPE=apple-darwin
         ;;
 
+    SunOS)
+        CFG_OSTYPE=sun-solaris
+        CFG_CPUTYPE=$(isainfo -n)
+        ;;
+
     MINGW*)
         # msys' `uname` does not print gcc configuration, but prints msys
         # configuration. so we cannot believe `uname -m`:

mk/cfg/x86_64-sun-solaris.mk

@@ -0,0 +1,23 @@
+# x86_64-sun-solaris configuration
+CROSS_PREFIX_x86_64-sun-solaris=x86_64-sun-solaris2.11-
+CC_x86_64-sun-solaris=$(CC)
+CXX_x86_64-sun-solaris=$(CXX)
+CPP_x86_64-sun-solaris=$(CPP)
+AR_x86_64-sun-solaris=$(AR)
+CFG_LIB_NAME_x86_64-sun-solaris=lib$(1).so
+CFG_STATIC_LIB_NAME_x86_64-sun-solaris=lib$(1).a
+CFG_LIB_GLOB_x86_64-sun-solaris=lib$(1)-*.so
+CFG_LIB_DSYM_GLOB_x86_64-sun-solaris=$(1)-*.dylib.dSYM
+CFG_JEMALLOC_CFLAGS_x86_64-sun-solaris := -I/usr/local/include $(CFLAGS)
+CFG_GCCISH_CFLAGS_x86_64-sun-solaris := -Wall -Werror -g -D_POSIX_PTHREAD_SEMANTICS -fPIC -I/usr/local/include $(CFLAGS)
+CFG_GCCISH_LINK_FLAGS_x86_64-sun-solaris := -shared -fPIC -g -pthread  -lrt
+CFG_GCCISH_DEF_FLAG_x86_64-sun-solaris := -Wl,--export-dynamic,--dynamic-list=
+CFG_LLC_FLAGS_x86_64-sun-solaris :=
+CFG_INSTALL_NAME_x86_64-sun-solaris =
+CFG_EXE_SUFFIX_x86_64-sun-solaris :=
+CFG_WINDOWSY_x86_64-sun-solaris :=
+CFG_UNIXY_x86_64-sun-solaris := 1
+CFG_LDPATH_x86_64-sun-solaris :=
+CFG_RUN_x86_64-sun-solaris=$(2)
+CFG_RUN_TARG_x86_64-sun-solaris=$(call CFG_RUN_x86_64-sun-solaris,,$(2))
+CFG_GNU_TRIPLE_x86_64-sun-solaris := x86_64-sun-solaris

src/compiletest/util.rs

@@ -25,6 +25,7 @@ const OS_TABLE: &'static [(&'static str, &'static str)] = &[
     ("openbsd", "openbsd"),
     ("win32", "windows"),
     ("windows", "windows"),
+    ("solaris", "solaris"),
 ];
 
 const ARCH_TABLE: &'static [(&'static str, &'static str)] = &[

src/etc/local_stage0.sh

@@ -18,7 +18,7 @@ LIB_PREFIX=lib
 
 OS=`uname -s`
 case $OS in
-    ("Linux"|"FreeBSD"|"DragonFly"|"Bitrig"|"OpenBSD")
+    ("Linux"|"FreeBSD"|"DragonFly"|"Bitrig"|"OpenBSD"|"SunOS")
     BIN_SUF=
     LIB_SUF=.so
     ;;

src/etc/snapshot.py

@@ -48,6 +48,7 @@ def scrub(b):
         "macos": ["bin/rustc"],
         "netbsd": ["bin/rustc"],
         "openbsd": ["bin/rustc"],
+        "solaris": ["bin/rustc"],
         "winnt": ["bin/rustc.exe"],
         }
 

src/librustc_back/target/mod.rs

@@ -59,6 +59,7 @@ mod freebsd_base;
 mod linux_base;
 mod openbsd_base;
 mod netbsd_base;
+mod solaris_base;
 mod windows_base;
 mod windows_msvc_base;
 
@@ -155,6 +156,10 @@ pub struct TargetOptions {
     /// Whether the target toolchain is like OSX's. Only useful for compiling against iOS/OS X, in
     /// particular running dsymutil and some other stuff like `-dead_strip`. Defaults to false.
     pub is_like_osx: bool,
+    /// Whether the target toolchain is like Solaris's.
+    /// Only useful for compiling against Illumos/Solaris,
+    /// as they have a different set of linker flags. Defaults to false.
+    pub is_like_solaris: bool,
     /// Whether the target toolchain is like Windows'. Only useful for compiling against Windows,
     /// only really used for figuring out how to find libraries, since Windows uses its own
     /// library naming convention. Defaults to false.
@@ -227,6 +232,7 @@ impl Default for TargetOptions {
             staticlib_suffix: ".a".to_string(),
             target_family: None,
             is_like_osx: false,
+            is_like_solaris: false,
             is_like_windows: false,
             is_like_android: false,
             is_like_msvc: false,
@@ -447,6 +453,8 @@ impl Target {
             armv7_apple_ios,
             armv7s_apple_ios,
 
+            x86_64_sun_solaris,
+
             x86_64_pc_windows_gnu,
             i686_pc_windows_gnu,
 

src/librustc_back/target/solaris_base.rs

@@ -0,0 +1,26 @@
+// Copyright 2014-2015 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::TargetOptions;
+use std::default::Default;
+
+pub fn opts() -> TargetOptions {
+    TargetOptions {
+        linker: "cc".to_string(),
+        dynamic_linking: true,
+        executables: true,
+        has_rpath: true,
+        is_like_solaris: true,
+        archive_format: "gnu".to_string(),
+        exe_allocation_crate: super::maybe_jemalloc(),
+
+        .. Default::default()
+    }
+}

src/librustc_back/target/x86_64_sun_solaris.rs

@@ -0,0 +1,27 @@
+// Copyright 2014-2015 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;
+
+pub fn target() -> Target {
+    let mut base = super::solaris_base::opts();
+    base.pre_link_args.push("-m64".to_string());
+
+    Target {
+        llvm_target: "x86_64-pc-solaris".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        arch: "x86_64".to_string(),
+        target_os: "solaris".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "sun".to_string(),
+        options: base,
+    }
+}

src/librustc_trans/back/linker.rs

@@ -131,6 +131,9 @@ impl<'a> Linker for GnuLinker<'a> {
         // insert it here.
         if self.sess.target.target.options.is_like_osx {
             self.cmd.arg("-Wl,-dead_strip");
+        } else if self.sess.target.target.options.is_like_solaris {
+            self.cmd.arg("-Wl,-z");
+            self.cmd.arg("-Wl,ignore");
 
         // If we're building a dylib, we don't use --gc-sections because LLVM
         // has already done the best it can do, and we also don't want to

src/librustdoc/flock.rs

@@ -111,6 +111,25 @@ mod imp {
         pub const F_SETLKW: libc::c_int = 9;
     }
 
+    #[cfg(target_os = "solaris")]
+    mod os {
+        use libc;
+
+        pub struct flock {
+            pub l_type: libc::c_short,
+            pub l_whence: libc::c_short,
+            pub l_start: libc::off_t,
+            pub l_len: libc::off_t,
+            pub l_sysid: libc::c_int,
+            pub l_pid: libc::pid_t,
+        }
+
+        pub const F_WRLCK: libc::c_short = 2;
+        pub const F_UNLCK: libc::c_short = 3;
+        pub const F_SETLK: libc::c_int = 6;
+        pub const F_SETLKW: libc::c_int = 7;
+    }
+
     pub struct Lock {
         fd: libc::c_int,
     }

src/libstd/dynamic_lib.rs

@@ -172,7 +172,8 @@ mod tests {
               target_os = "dragonfly",
               target_os = "bitrig",
               target_os = "netbsd",
-              target_os = "openbsd"))]
+              target_os = "openbsd",
+              target_os = "solaris"))]
     #[allow(deprecated)]
     fn test_errors_do_not_crash() {
         use path::Path;
@@ -195,7 +196,8 @@ mod tests {
           target_os = "dragonfly",
           target_os = "bitrig",
           target_os = "netbsd",
-          target_os = "openbsd"))]
+          target_os = "openbsd",
+          target_os = "solaris"))]
 mod dl {
     use prelude::v1::*;
 

src/libstd/env.rs

@@ -640,6 +640,7 @@ pub mod consts {
     /// - bitrig
     /// - netbsd
     /// - openbsd
+    /// - solaris
     /// - android
     /// - windows
     #[stable(feature = "env", since = "1.0.0")]
@@ -800,6 +801,17 @@ mod os {
     pub const EXE_EXTENSION: &'static str = "";
 }
 
+#[cfg(target_os = "solaris")]
+mod os {
+    pub const FAMILY: &'static str = "unix";
+    pub const OS: &'static str = "solaris";
+    pub const DLL_PREFIX: &'static str = "lib";
+    pub const DLL_SUFFIX: &'static str = ".so";
+    pub const DLL_EXTENSION: &'static str = "so";
+    pub const EXE_SUFFIX: &'static str = "";
+    pub const EXE_EXTENSION: &'static str = "";
+}
+
 #[cfg(target_os = "windows")]
 mod os {
     pub const FAMILY: &'static str = "windows";

src/libstd/num/f64.rs

@@ -511,7 +511,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn ln(self) -> f64 {
-        unsafe { intrinsics::logf64(self) }
+        self.log_wrapper(|n| { unsafe { intrinsics::logf64(n) } })
     }
 
     /// Returns the logarithm of the number with respect to an arbitrary base.
@@ -546,7 +546,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn log2(self) -> f64 {
-        unsafe { intrinsics::log2f64(self) }
+        self.log_wrapper(|n| { unsafe { intrinsics::log2f64(n) } })
     }
 
     /// Returns the base 10 logarithm of the number.
@@ -562,7 +562,7 @@ impl f64 {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
     pub fn log10(self) -> f64 {
-        unsafe { intrinsics::log10f64(self) }
+        self.log_wrapper(|n| { unsafe { intrinsics::log10f64(n) } })
     }
 
     /// Converts radians to degrees.
@@ -1065,6 +1065,31 @@ impl f64 {
     pub fn atanh(self) -> f64 {
         0.5 * ((2.0 * self) / (1.0 - self)).ln_1p()
     }
+
+    // Solaris/Illumos requires a wrapper around log, log2, and log10 functions
+    // because of their non-standard behavior (e.g. log(-n) returns -Inf instead
+    // of expected NaN).
+    fn log_wrapper<F: Fn(f64) -> f64>(self, log_fn: F) -> f64 {
+        if !cfg!(target_os = "solaris") {
+            log_fn(self)
+        } else {
+            if self.is_finite() {
+                if self > 0.0 {
+                    log_fn(self)
+                } else if self == 0.0 {
+                    NEG_INFINITY // log(0) = -Inf
+                } else {
+                    NAN // log(-n) = NaN
+                }
+            } else if self.is_nan() {
+                self // log(NaN) = NaN
+            } else if self > 0.0 {
+                self // log(Inf) = Inf
+            } else {
+                NAN // log(-Inf) = NaN
+            }
+        }
+    }
 }
 
 #[cfg(test)]

src/libstd/os/mod.rs

@@ -30,5 +30,6 @@ pub use sys::ext as windows;
 #[cfg(target_os = "nacl")]      pub mod nacl;
 #[cfg(target_os = "netbsd")]   pub mod netbsd;
 #[cfg(target_os = "openbsd")]   pub mod openbsd;
+#[cfg(target_os = "solaris")]   pub mod solaris;
 
 pub mod raw;

src/libstd/os/solaris/mod.rs

@@ -0,0 +1,21 @@
+// Copyright 2015 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.
+
+//! Solaris-specific definitions
+
+#![stable(feature = "raw_ext", since = "1.1.0")]
+
+pub mod raw;
+
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub mod fs {
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub use sys::fs::MetadataExt;
+}