New cross target: i686-linux-android

- All the libstd tests are now passing in the optimized build against
  a Zenfone2 and the x86 Android simulator.

configure

@@ -602,6 +602,7 @@ valopt python "" "set path to python"
 valopt jemalloc-root "" "set directory where libjemalloc_pic.a is located"
 valopt build "${DEFAULT_BUILD}" "GNUs ./configure syntax LLVM build triple"
 valopt android-cross-path "/opt/ndk_standalone" "Android NDK standalone path (deprecated)"
+valopt i686-linux-android-ndk "" "i686-linux-android NDK standalone path"
 valopt arm-linux-androideabi-ndk "" "arm-linux-androideabi NDK standalone path"
 valopt aarch64-linux-android-ndk "" "aarch64-linux-android NDK standalone path"
 valopt release-channel "dev" "the name of the release channel to build"
@@ -1693,6 +1694,7 @@ putvar CFG_LIBDIR_RELATIVE
 putvar CFG_DISABLE_MANAGE_SUBMODULES
 putvar CFG_AARCH64_LINUX_ANDROID_NDK
 putvar CFG_ARM_LINUX_ANDROIDEABI_NDK
+putvar CFG_I686_LINUX_ANDROID_NDK
 putvar CFG_MANDIR
 
 # Avoid spurious warnings from clang by feeding it original source on

mk/cfg/i686-linux-android.mk

@@ -0,0 +1,25 @@
+# i686-linux-android configuration
+CC_i686-linux-android=$(CFG_I686_LINUX_ANDROID_NDK)/bin/i686-linux-android-gcc
+CXX_i686-linux-android=$(CFG_I686_LINUX_ANDROID_NDK)/bin/i686-linux-android-g++
+CPP_i686-linux-android=$(CFG_I686_LINUX_ANDROID_NDK)/bin/i686-linux-android-gcc -E
+AR_i686-linux-android=$(CFG_I686_LINUX_ANDROID_NDK)/bin/i686-linux-android-ar
+CFG_LIB_NAME_i686-linux-android=lib$(1).so
+CFG_STATIC_LIB_NAME_i686-linux-android=lib$(1).a
+CFG_LIB_GLOB_i686-linux-android=lib$(1)-*.so
+CFG_LIB_DSYM_GLOB_i686-linux-android=lib$(1)-*.dylib.dSYM
+CFG_JEMALLOC_CFLAGS_i686-linux-android := -D__i686__ -DANDROID -D__ANDROID__ $(CFLAGS)
+CFG_GCCISH_CFLAGS_i686-linux-android := -Wall -g -fPIC -D__i686__ -DANDROID -D__ANDROID__ $(CFLAGS)
+CFG_GCCISH_CXXFLAGS_i686-linux-android := -fno-rtti $(CXXFLAGS)
+CFG_GCCISH_LINK_FLAGS_i686-linux-android := -shared -fPIC -ldl -g -lm -lsupc++
+CFG_GCCISH_DEF_FLAG_i686-linux-android := -Wl,--export-dynamic,--dynamic-list=
+CFG_LLC_FLAGS_i686-linux-android :=
+CFG_INSTALL_NAME_i686-linux-android =
+CFG_EXE_SUFFIX_i686-linux-android :=
+CFG_WINDOWSY_i686-linux-android :=
+CFG_UNIXY_i686-linux-android := 1
+CFG_LDPATH_i686-linux-android :=
+CFG_RUN_i686-linux-android=
+CFG_RUN_TARG_i686-linux-android=
+RUSTC_FLAGS_i686-linux-android :=
+RUSTC_CROSS_FLAGS_i686-linux-android :=
+CFG_GNU_TRIPLE_i686-linux-android := i686-linux-android

src/liblibc/lib.rs

@@ -465,18 +465,19 @@ pub mod types {
                 pub type off_t = i32;
                 pub type dev_t = u32;
                 pub type ino_t = u32;
+
                 pub type pid_t = i32;
                 pub type uid_t = u32;
                 pub type gid_t = u32;
                 pub type useconds_t = u32;
+
                 pub type mode_t = u16;
                 pub type ssize_t = i32;
             }
-            #[cfg(any(target_arch = "x86",
+            #[cfg(any(all(any(target_arch = "arm", target_arch = "x86"),
+                          not(target_os = "android")),
                       target_arch = "le32",
-                      target_arch = "powerpc",
+                      target_arch = "powerpc"))]
-                      all(any(target_arch = "arm", target_arch = "x86"),
-                          not(target_os = "android"))))]
             pub mod posix01 {
                 use types::os::arch::c95::{c_short, c_long, time_t};
                 use types::os::arch::posix88::{dev_t, gid_t, ino_t};
@@ -522,12 +523,13 @@ pub mod types {
                     pub __size: [u32; 9]
                 }
             }
+
             #[cfg(all(any(target_arch = "arm", target_arch = "x86"),
-                          target_os = "android"))]
+                      target_os = "android"))]
             pub mod posix01 {
-                use types::os::arch::c95::{c_uchar, c_uint, c_ulong, time_t};
+                use types::os::arch::c95::{c_uchar, c_uint, c_ulong, c_long, time_t};
                 use types::os::arch::c99::{c_longlong, c_ulonglong};
-                use types::os::arch::posix88::{uid_t, gid_t, ino_t};
+                use types::os::arch::posix88::{uid_t, gid_t};
 
                 pub type nlink_t = u16;
                 pub type blksize_t = u32;
@@ -537,7 +539,7 @@ pub mod types {
                 #[derive(Copy, Clone)] pub struct stat {
                     pub st_dev: c_ulonglong,
                     pub __pad0: [c_uchar; 4],
-                    pub __st_ino: ino_t,
+                    pub __st_ino: c_long,
                     pub st_mode: c_uint,
                     pub st_nlink: c_uint,
                     pub st_uid: uid_t,
@@ -545,7 +547,7 @@ pub mod types {
                     pub st_rdev: c_ulonglong,
                     pub __pad3: [c_uchar; 4],
                     pub st_size: c_longlong,
-                    pub st_blksize: blksize_t,
+                    pub st_blksize: c_ulong,
                     pub st_blocks: c_ulonglong,
                     pub st_atime: time_t,
                     pub st_atime_nsec: c_ulong,
@@ -567,6 +569,7 @@ pub mod types {
                     pub __size: [u32; 9]
                 }
             }
+
             #[cfg(any(target_arch = "mips",
                       target_arch = "mipsel"))]
             pub mod posix01 {
@@ -993,7 +996,12 @@ pub mod types {
             pub mod posix88 {
                 pub type off_t = i64;
                 pub type dev_t = u32;
+
+                #[cfg(target_os = "android")]
+                pub type ino_t = u64;
+                #[cfg(not(target_os = "android"))]
                 pub type ino_t = u32;
+
                 pub type pid_t = i32;
                 pub type uid_t = u32;
                 pub type gid_t = u32;

src/librustc_back/target/i686_linux_android.rs

@@ -0,0 +1,23 @@
+// Copyright 2014 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 {
+    Target {
+        llvm_target: "i686-linux-android".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "32".to_string(),
+        arch: "x86".to_string(),
+        target_os: "android".to_string(),
+        target_env: "gnu".to_string(),
+        options: super::android_base::opts(),
+    }
+}

src/librustc_back/target/mod.rs

@@ -373,6 +373,7 @@ impl Target {
             aarch64_unknown_linux_gnu,
             x86_64_unknown_linux_musl,
 
+            i686_linux_android,
             arm_linux_androideabi,
             aarch64_linux_android,
 

src/libstd/os/android/raw.rs

@@ -15,7 +15,7 @@
 #[doc(inline)]
 pub use self::arch::{dev_t, mode_t, blkcnt_t, blksize_t, ino_t, nlink_t, off_t, stat, time_t};
 
-#[cfg(target_arch = "arm")]
+#[cfg(any(target_arch = "arm", target_arch = "x86"))]
 mod arch {
     use os::raw::{c_uint, c_uchar, c_ulonglong, c_longlong, c_ulong};
     use os::unix::raw::{uid_t, gid_t};
@@ -150,3 +150,4 @@ mod arch {
         pub st_ino: ino_t,
     }
 }
+

src/rt/rust_builtin.c

@@ -39,6 +39,13 @@ rust_list_dir_val(struct dirent* entry_ptr) {
     return entry_ptr->d_name;
 }
 
+// Android's struct dirent does have d_type from the very beginning
+// (android-3). _DIRENT_HAVE_D_TYPE is not defined all the way to android-21
+// though...
+#if defined(__ANDROID__)
+# define _DIRENT_HAVE_D_TYPE
+#endif
+
 int
 rust_dir_get_mode(struct dirent* entry_ptr) {
 #if defined(_DIRENT_HAVE_D_TYPE) || defined(__APPLE__)