Better iOS support

mk/cfg/aarch64-apple-ios.mk

@@ -0,0 +1,36 @@
+# aarch64-apple-ios configuration
+CFG_SDK_NAME_aarch64-apple-ios := iphoneos
+CFG_SDK_ARCHS_aarch64-apple-ios := arm64
+ifneq ($(findstring darwin,$(CFG_OSTYPE)),)
+CFG_IOS_SDK_aarch64-apple-ios := $(shell xcrun --show-sdk-path -sdk iphoneos 2>/dev/null)
+CFG_IOS_SDK_FLAGS_aarch64-apple-ios := -target aarch64-apple-darwin -isysroot $(CFG_IOS_SDK_aarch64-apple-ios) -mios-version-min=7.0 -arch arm64
+CC_aarch64-apple-ios = $(shell xcrun -find -sdk iphoneos clang)
+CXX_aarch64-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+CPP_aarch64-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+AR_aarch64-apple-ios = $(shell xcrun -find -sdk iphoneos ar)
+endif
+CFG_LIB_NAME_aarch64-apple-ios = lib$(1).a
+CFG_LIB_GLOB_aarch64-apple-ios = lib$(1)-*.a
+CFG_LIB_SKIP_INSTALL_aarch64-apple-ios = 1 #lib$(1)-*.a
+CFG_STATIC_LIB_NAME_aarch64-apple-ios=lib$(1).a
+CFG_LIB_DSYM_GLOB_aarch64-apple-ios = lib$(1)-*.a.dSYM
+CFG_CFLAGS_aarch64-apple-ios := $(CFG_IOS_SDK_FLAGS_aarch64-apple-ios)
+CFG_JEMALLOC_CFLAGS_aarch64-apple-ios := $(CFG_IOS_SDK_FLAGS_aarch64-apple-ios)
+CFG_GCCISH_CFLAGS_aarch64-apple-ios := -Wall -Werror -fPIC $(CFG_IOS_SDK_FLAGS_aarch64-apple-ios)
+CFG_GCCISH_CXXFLAGS_aarch64-apple-ios := -fno-rtti $(CFG_IOS_SDK_FLAGS_aarch64-apple-ios) -I$(CFG_IOS_SDK_aarch64-apple-ios)/usr/include/c++/4.2.1
+CFG_GCCISH_LINK_FLAGS_aarch64-apple-ios := -lpthread -syslibroot $(CFG_IOS_SDK_aarch64-apple-ios) -Wl,-no_compact_unwind
+CFG_GCCISH_DEF_FLAG_aarch64-apple-ios := -Wl,-exported_symbols_list,
+CFG_GCCISH_PRE_LIB_FLAGS_aarch64-apple-ios :=
+CFG_GCCISH_POST_LIB_FLAGS_aarch64-apple-ios :=
+CFG_DEF_SUFFIX_aarch64-apple-ios := .darwin.def
+CFG_LLC_FLAGS_aarch64-apple-ios := -mattr=+neon,+cyclone,+fp-armv8
+CFG_INSTALL_NAME_aarch64-apple-ios = -Wl,-install_name,@rpath/$(1)
+CFG_LIBUV_LINK_FLAGS_aarch64-apple-ios =
+CFG_EXE_SUFFIX_aarch64-apple-ios :=
+CFG_WINDOWSY_aarch64-apple-ios :=
+CFG_UNIXY_aarch64-apple-ios := 1
+CFG_PATH_MUNGE_aarch64-apple-ios := true
+CFG_LDPATH_aarch64-apple-ios :=
+CFG_RUN_aarch64-apple-ios = $(2)
+CFG_RUN_TARG_aarch64-apple-ios = $(call CFG_RUN_aarch64-apple-ios,,$(2))
+CFG_GNU_TRIPLE_aarch64-apple-ios := aarch64-apple-ios

mk/cfg/armv7-apple-ios.mk

@@ -0,0 +1,34 @@
+# armv7-apple-ios configuration
+CFG_SDK_NAME_armv7-apple-ios := iphoneos
+CFG_SDK_ARCHS_armv7-apple-ios := armv7
+ifneq ($(findstring darwin,$(CFG_OSTYPE)),)
+CFG_IOS_SDK_armv7-apple-ios := $(shell xcrun --show-sdk-path -sdk iphoneos 2>/dev/null)
+CFG_IOS_SDK_FLAGS_armv7-apple-ios := -target armv7-apple-ios -isysroot $(CFG_IOS_SDK_armv7-apple-ios) -mios-version-min=7.0
+CC_armv7-apple-ios = $(shell xcrun -find -sdk iphoneos clang)
+CXX_armv7-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+CPP_armv7-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+AR_armv7-apple-ios = $(shell xcrun -find -sdk iphoneos ar)
+endif
+CFG_LIB_NAME_armv7-apple-ios = lib$(1).a
+CFG_LIB_GLOB_armv7-apple-ios = lib$(1)-*.a
+CFG_LIB_SKIP_INSTALL_armv7-apple-ios = 1 #lib$(1)-*.a
+CFG_STATIC_LIB_NAME_armv7-apple-ios=lib$(1).a
+CFG_LIB_DSYM_GLOB_armv7-apple-ios = lib$(1)-*.a.dSYM
+CFG_JEMALLOC_CFLAGS_armv7-apple-ios := -arch armv7 -mfpu=vfp3 $(CFG_IOS_SDK_FLAGS_armv7-apple-ios)
+CFG_GCCISH_CFLAGS_armv7-apple-ios := -Wall -Werror -g -fPIC $(CFG_IOS_SDK_FLAGS_armv7-apple-ios) -mfpu=vfp3 -arch armv7
+CFG_GCCISH_CXXFLAGS_armv7-apple-ios := -fno-rtti $(CFG_IOS_SDK_FLAGS_armv7-apple-ios) -I$(CFG_IOS_SDK_armv7-apple-ios)/usr/include/c++/4.2.1
+CFG_GCCISH_LINK_FLAGS_armv7-apple-ios := -lpthread -syslibroot $(CFG_IOS_SDK_armv7-apple-ios) -Wl,-no_compact_unwind
+CFG_GCCISH_DEF_FLAG_armv7-apple-ios := -Wl,-exported_symbols_list,
+CFG_GCCISH_PRE_LIB_FLAGS_armv7-apple-ios :=
+CFG_GCCISH_POST_LIB_FLAGS_armv7-apple-ios :=
+CFG_DEF_SUFFIX_armv7-apple-ios := .darwin.def
+CFG_LLC_FLAGS_armv7-apple-ios := -mattr=+vfp3,+v7,+neon -march=arm
+CFG_INSTALL_NAME_armv7-apple-ios = -Wl,-install_name,@rpath/$(1)
+CFG_EXE_SUFFIX_armv7-apple-ios :=
+CFG_WINDOWSY_armv7-apple-ios :=
+CFG_UNIXY_armv7-apple-ios := 1
+CFG_PATH_MUNGE_armv7-apple-ios := true
+CFG_LDPATH_armv7-apple-ios :=
+CFG_RUN_armv7-apple-ios = $(2)
+CFG_RUN_TARG_armv7-apple-ios = $(call CFG_RUN_armv7-apple-ios,,$(2))
+CFG_GNU_TRIPLE_armv7-apple-ios := armv7-apple-ios

mk/cfg/armv7s-apple-ios.mk

@@ -0,0 +1,34 @@
+# armv7s-apple-ios configuration
+CFG_SDK_NAME_armv7s-apple-ios := iphoneos
+CFG_SDK_ARCHS_armv7s-apple-ios := armv7s
+ifneq ($(findstring darwin,$(CFG_OSTYPE)),)
+CFG_IOS_SDK_armv7s-apple-ios := $(shell xcrun --show-sdk-path -sdk iphoneos 2>/dev/null)
+CFG_IOS_SDK_FLAGS_armv7s-apple-ios := -target armv7s-apple-ios -isysroot $(CFG_IOS_SDK_armv7s-apple-ios) -mios-version-min=7.0
+CC_armv7s-apple-ios = $(shell xcrun -find -sdk iphoneos clang)
+CXX_armv7s-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+CPP_armv7s-apple-ios = $(shell xcrun -find -sdk iphoneos clang++)
+AR_armv7s-apple-ios = $(shell xcrun -find -sdk iphoneos ar)
+endif
+CFG_LIB_NAME_armv7s-apple-ios = lib$(1).a
+CFG_LIB_GLOB_armv7s-apple-ios = lib$(1)-*.a
+CFG_LIB_SKIP_INSTALL_armv7s-apple-ios = 1 #lib$(1)-*.a
+CFG_STATIC_LIB_NAME_armv7s-apple-ios=lib$(1).a
+CFG_LIB_DSYM_GLOB_armv7s-apple-ios = lib$(1)-*.a.dSYM
+CFG_JEMALLOC_CFLAGS_armv7s-apple-ios := -arch armv7s -mfpu=vfp4 $(CFG_IOS_SDK_FLAGS_armv7s-apple-ios)
+CFG_GCCISH_CFLAGS_armv7s-apple-ios := -Wall -Werror -g -fPIC $(CFG_IOS_SDK_FLAGS_armv7s-apple-ios) -mfpu=vfp4 -arch armv7s
+CFG_GCCISH_CXXFLAGS_armv7s-apple-ios := -fno-rtti $(CFG_IOS_SDK_FLAGS_armv7s-apple-ios) -I$(CFG_IOS_SDK_armv7s-apple-ios)/usr/include/c++/4.2.1
+CFG_GCCISH_LINK_FLAGS_armv7s-apple-ios := -lpthread -syslibroot $(CFG_IOS_SDK_armv7s-apple-ios) -Wl,-no_compact_unwind
+CFG_GCCISH_DEF_FLAG_armv7s-apple-ios := -Wl,-exported_symbols_list,
+CFG_GCCISH_PRE_LIB_FLAGS_armv7s-apple-ios :=
+CFG_GCCISH_POST_LIB_FLAGS_armv7s-apple-ios :=
+CFG_DEF_SUFFIX_armv7s-apple-ios := .darwin.def
+CFG_LLC_FLAGS_armv7s-apple-ios := -mattr=+vfp4,+v7,+neon
+CFG_INSTALL_NAME_armv7s-apple-ios = -Wl,-install_name,@rpath/$(1)
+CFG_EXE_SUFFIX_armv7s-apple-ios :=
+CFG_WINDOWSY_armv7s-apple-ios :=
+CFG_UNIXY_armv7s-apple-ios := 1
+CFG_PATH_MUNGE_armv7s-apple-ios := true
+CFG_LDPATH_armv7s-apple-ios :=
+CFG_RUN_armv7s-apple-ios = $(2)
+CFG_RUN_TARG_armv7s-apple-ios = $(call CFG_RUN_armv7s-apple-ios,,$(2))
+CFG_GNU_TRIPLE_armv7s-apple-ios := armv7s-apple-ios

mk/cfg/i386-apple-ios.mk

@@ -1,9 +1,9 @@
 # i386-apple-ios configuration
-CFG_SDK_NAME_i386-apple-ios = iphonesimulator
-CFG_SDK_ARCHS_i386-apple-ios = i386
+CFG_SDK_NAME_i386-apple-ios := iphonesimulator
+CFG_SDK_ARCHS_i386-apple-ios := i386
 ifneq ($(findstring darwin,$(CFG_OSTYPE)),)
-CFG_IOSSIM_SDK = $(shell xcrun --show-sdk-path -sdk iphonesimulator 2>/dev/null)
-CFG_IOSSIM_FLAGS = -target i386-apple-ios -isysroot $(CFG_IOSSIM_SDK) -mios-simulator-version-min=7.0
+CFG_IOSSIM_SDK_i386-apple-ios := $(shell xcrun --show-sdk-path -sdk iphonesimulator 2>/dev/null)
+CFG_IOSSIM_FLAGS_i386-apple-ios := -m32 -target i386-apple-ios -isysroot $(CFG_IOSSIM_SDK_i386-apple-ios) -mios-simulator-version-min=7.0
 CC_i386-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang)
 CXX_i386-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang++)
 CPP_i386-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang++)
@@ -13,21 +13,21 @@ CFG_LIB_NAME_i386-apple-ios = lib$(1).a
 CFG_LIB_GLOB_i386-apple-ios = lib$(1)-*.dylib
 CFG_STATIC_LIB_NAME_i386-apple-ios=lib$(1).a
 CFG_LIB_DSYM_GLOB_i386-apple-ios = lib$(1)-*.dylib.dSYM
-CFG_GCCISH_CFLAGS_i386-apple-ios = -Wall -Werror -g -fPIC -m32 $(CFG_IOSSIM_FLAGS)
-CFG_GCCISH_CXXFLAGS_i386-apple-ios = -fno-rtti $(CFG_IOSSIM_FLAGS) -I$(CFG_IOSSIM_SDK)/usr/include/c++/4.2.1
-CFG_GCCISH_LINK_FLAGS_i386-apple-ios = -lpthread -Wl,-no_compact_unwind -m32 -Wl,-syslibroot $(CFG_IOSSIM_SDK)
-CFG_GCCISH_DEF_FLAG_i386-apple-ios = -Wl,-exported_symbols_list,
-CFG_GCCISH_PRE_LIB_FLAGS_i386-apple-ios =
-CFG_GCCISH_POST_LIB_FLAGS_i386-apple-ios =
-CFG_DEF_SUFFIX_i386-apple-ios = .darwin.def
+CFG_GCCISH_CFLAGS_i386-apple-ios := -Wall -Werror -g -fPIC -m32 $(CFG_IOSSIM_FLAGS_i386-apple-ios)
+CFG_GCCISH_CXXFLAGS_i386-apple-ios := -fno-rtti $(CFG_IOSSIM_FLAGS_i386-apple-ios) -I$(CFG_IOSSIM_SDK_i386-apple-ios)/usr/include/c++/4.2.1
+CFG_GCCISH_LINK_FLAGS_i386-apple-ios := -lpthread -m32 -Wl,-no_compact_unwind -m32 -Wl,-syslibroot $(CFG_IOSSIM_SDK_i386-apple-ios)
+CFG_GCCISH_DEF_FLAG_i386-apple-ios := -Wl,-exported_symbols_list,
+CFG_GCCISH_PRE_LIB_FLAGS_i386-apple-ios :=
+CFG_GCCISH_POST_LIB_FLAGS_i386-apple-ios :=
+CFG_DEF_SUFFIX_i386-apple-ios := .darwin.def
 CFG_LLC_FLAGS_i386-apple-ios =
 CFG_INSTALL_NAME_i386-apple-ios = -Wl,-install_name,@rpath/$(1)
-CFG_EXE_SUFFIX_i386-apple-ios =
-CFG_WINDOWSY_i386-apple-ios =
-CFG_UNIXY_i386-apple-ios = 1
-CFG_PATH_MUNGE_i386-apple-ios = true
+CFG_EXE_SUFFIX_i386-apple-ios :=
+CFG_WINDOWSY_i386-apple-ios :=
+CFG_UNIXY_i386-apple-ios := 1
+CFG_PATH_MUNGE_i386-apple-ios = :true
 CFG_LDPATH_i386-apple-ios =
 CFG_RUN_i386-apple-ios = $(2)
 CFG_RUN_TARG_i386-apple-ios = $(call CFG_RUN_i386-apple-ios,,$(2))
-CFG_JEMALLOC_CFLAGS_i386-apple-ios = $(CFG_IOSSIM_FLAGS) -target i386-apple-ios -Wl,-syslibroot $(CFG_IOSSIM_SDK) -Wl,-no_compact_unwind
+CFG_JEMALLOC_CFLAGS_i386-apple-ios = $(CFG_IOSSIM_FLAGS_i386-apple-ios) -target i386-apple-ios #-Wl,-syslibroot $(CFG_IOSSIM_SDK_i386-apple-ios) -Wl,-no_compact_unwind
 CFG_GNU_TRIPLE_i386-apple-ios := i386-apple-ios

mk/cfg/x86_64-apple-ios.mk

@@ -0,0 +1,36 @@
+# x86_64-apple-ios configuration
+CFG_SDK_NAME_x86_64-apple-ios := iphonesimulator
+CFG_SDK_ARCHS_x86_64-apple-ios := x86_64
+ifneq ($(findstring darwin,$(CFG_OSTYPE)),)
+CFG_IOSSIM_SDK_x86_64-apple-ios := $(shell xcrun --show-sdk-path -sdk iphonesimulator 2>/dev/null)
+CFG_IOSSIM_FLAGS_x86_64-apple-ios := -m64 -target x86_64-apple-ios -isysroot $(CFG_IOSSIM_SDK_x86_64-apple-ios) -mios-simulator-version-min=7.0
+CC_x86_64-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang)
+CXX_x86_64-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang++)
+CPP_x86_64-apple-ios = $(shell xcrun -find -sdk iphonesimulator clang++)
+AR_x86_64-apple-ios = $(shell xcrun -find -sdk iphonesimulator ar)
+endif
+CFG_LIB_NAME_x86_64-apple-ios = lib$(1).a
+CFG_LIB_GLOB_x86_64-apple-ios = lib$(1)-*.a
+CFG_LIB_SKIP_INSTALL_x86_64-apple-ios = 1 #lib$(1)-*.a
+CFG_STATIC_LIB_NAME_x86_64-apple-ios=lib$(1).a
+CFG_LIB_DSYM_GLOB_x86_64-apple-ios = lib$(1)-*.a.dSYM
+CFG_CFLAGS_x86_64-apple-ios := $(CFG_IOSSIM_FLAGS_x86_64-apple-ios)
+CFG_JEMALLOC_CFLAGS_x86_64-apple-ios := $(CFG_IOSSIM_FLAGS_x86_64-apple-ios)
+CFG_GCCISH_CFLAGS_x86_64-apple-ios := -Wall -Werror -fPIC $(CFG_IOSSIM_FLAGS_x86_64-apple-ios)
+CFG_GCCISH_CXXFLAGS_x86_64-apple-ios := -fno-rtti $(CFG_IOSSIM_FLAGS_x86_64-apple-ios) -I$(CFG_IOSSIM_SDK_x86_64-apple-ios)/usr/include/c++/4.2.1
+CFG_GCCISH_LINK_FLAGS_x86_64-apple-ios := -lpthread -Wl,-no_compact_unwind -m64 -Wl,-syslibroot $(CFG_IOSSIM_SDK_x86_64-apple-ios)
+CFG_GCCISH_DEF_FLAG_x86_64-apple-ios := -Wl,-exported_symbols_list,
+CFG_GCCISH_PRE_LIB_FLAGS_x86_64-apple-ios :=
+CFG_GCCISH_POST_LIB_FLAGS_x86_64-apple-ios :=
+CFG_DEF_SUFFIX_x86_64-apple-ios := .darwin.def
+CFG_LLC_FLAGS_x86_64-apple-ios :=
+CFG_INSTALL_NAME_x86_64-apple-ios = -Wl,-install_name,@rpath/$(1)
+CFG_LIBUV_LINK_FLAGS_x86_64-apple-ios :=
+CFG_EXE_SUFFIX_x86_64-apple-ios :=
+CFG_WINDOWSY_x86_64-apple-ios :=
+CFG_UNIXY_x86_64-apple-ios := 1
+CFG_PATH_MUNGE_x86_64-apple-ios := true
+CFG_LDPATH_x86_64-apple-ios :=
+CFG_RUN_x86_64-apple-ios = $(2)
+CFG_RUN_TARG_x86_64-apple-ios = $(call CFG_RUN_x86_64-apple-ios,,$(2))
+CFG_GNU_TRIPLE_i386-apple-ios := x86_64-apple-ios

src/liblibc/lib.rs

@@ -1968,7 +1968,7 @@ pub mod types {
             }
         }
 
-        #[cfg(target_arch = "x86_64")]
+        #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))]
         pub mod arch {
             pub mod c95 {
                 pub type c_char = i8;

src/librustc_back/target/aarch64_apple_ios.rs

@@ -0,0 +1,31 @@
+// 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, TargetOptions};
+use super::apple_ios_base::{opts, Arch};
+
+pub fn target() -> Target {
+    Target {
+        // reference layout: e-m:o-i64:64-i128:128-n32:64-S128
+        data_layout: "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-\
+                      i128:128-f32:32:32-f64:64:64-v64:64:64-v128:128:128-\
+                      a:0:64-n32:64-S128".to_string(),
+        llvm_target: "arm64-apple-ios".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        arch: "aarch64".to_string(),
+        target_os: "ios".to_string(),
+        options: TargetOptions {
+            features: "+neon,+fp-armv8,+cyclone".to_string(),
+            eliminate_frame_pointer: false,
+            .. opts(Arch::Arm64)
+        },
+    }
+}

src/librustc_back/target/apple_ios_base.rs

@@ -0,0 +1,88 @@
+// 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 std::io::{Command, IoError, OtherIoError};
+use target::TargetOptions;
+
+use self::Arch::*;
+
+#[allow(non_camel_case_types)]
+pub enum Arch {
+    Armv7,
+    Armv7s,
+    Arm64,
+    I386,
+    X86_64
+}
+
+impl Arch {
+    pub fn to_string(&self) -> &'static str {
+        match self {
+            &Armv7 => "armv7",
+            &Armv7s => "armv7s",
+            &Arm64 => "arm64",
+            &I386 => "i386",
+            &X86_64 => "x86_64"
+        }
+    }
+}
+
+pub fn get_sdk_root(sdk_name: &str) -> String {
+    let res = Command::new("xcrun")
+                      .arg("--show-sdk-path")
+                      .arg("-sdk")
+                      .arg(sdk_name)
+                      .spawn()
+                      .and_then(|c| c.wait_with_output())
+                      .and_then(|output| {
+                          if output.status.success() {
+                              Ok(String::from_utf8(output.output).unwrap())
+                          } else {
+                              Err(IoError {
+                                  kind: OtherIoError,
+                                  desc: "process exit with error",
+                                  detail: String::from_utf8(output.error).ok()})
+                          }
+                      });
+
+    match res {
+        Ok(output) => output.trim().to_string(),
+        Err(e) => panic!("failed to get {} SDK path: {}", sdk_name, e)
+    }
+}
+
+fn pre_link_args(arch: Arch) -> Vec<String> {
+    let sdk_name = match arch {
+        Armv7 | Armv7s | Arm64 => "iphoneos",
+        I386 | X86_64 => "iphonesimulator"
+    };
+
+    let arch_name = arch.to_string();
+
+    vec!["-arch".to_string(), arch_name.to_string(),
+         "-Wl,-syslibroot".to_string(), get_sdk_root(sdk_name)]
+}
+
+pub fn opts(arch: Arch) -> TargetOptions {
+    TargetOptions {
+        dynamic_linking: false,
+        executables: true,
+        // Although there is an experimental implementation of LLVM which
+        // supports SS on armv7 it wasn't approved by Apple, see:
+        // http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20140505/216350.html
+        // It looks like it might be never accepted to upstream LLVM.
+        //
+        // SS might be also enabled on Arm64 as it has builtin support in LLVM
+        // but I haven't tested it through yet
+        morestack: false,
+        pre_link_args: pre_link_args(arch),
+        .. super::apple_base::opts()
+    }
+}