//! the target's settings, though `target-feature` and `link-args` will *add*
//! to the list specified by the target, rather than replace.
-use serialize::json::Json;
+use serialize::json::{Json, ToJson};
+use std::collections::BTreeMap;
use std::default::Default;
use std::io::prelude::*;
use syntax::abi::Abi;
mod windows_base;
mod windows_msvc_base;
+pub type TargetResult = Result<Target, String>;
+
macro_rules! supported_targets {
( $(($triple:expr, $module:ident)),+ ) => (
$(mod $module;)*
/// List of supported targets
- pub const TARGETS: &'static [&'static str] = &[$($triple),*];
+ const TARGETS: &'static [&'static str] = &[$($triple),*];
+
+ fn load_specific(target: &str) -> TargetResult {
+ match target {
+ $(
+ $triple => {
+ let mut t = try!($module::target());
+ t.options.is_builtin = true;
+
+ // round-trip through the JSON parser to ensure at
+ // run-time that the parser works correctly
+ t = try!(Target::from_json(t.to_json()));
+ debug!("Got builtin target: {:?}", t);
+ Ok(t)
+ },
+ )+
+ _ => Err(format!("Unable to find target: {}", target))
+ }
+ }
+
+ pub fn get_targets() -> Box<Iterator<Item=String>> {
+ Box::new(TARGETS.iter().filter_map(|t| -> Option<String> {
+ load_specific(t)
+ .and(Ok(t.to_string()))
+ .ok()
+ }))
+ }
+
+ #[cfg(test)]
+ mod test_json_encode_decode {
+ use serialize::json::ToJson;
+ use super::Target;
+ $(use super::$module;)*
- // this would use a match if stringify! were allowed in pattern position
- fn load_specific(target: &str) -> Option<Target> {
- let target = target.replace("-", "_");
- if false { }
$(
- else if target == stringify!($module) {
- let mut t = $module::target();
- t.options.is_builtin = true;
- debug!("Got builtin target: {:?}", t);
- return Some(t);
+ #[test]
+ fn $module() {
+ // Grab the TargetResult struct. If we successfully retrieved
+ // a Target, then the test JSON encoding/decoding can run for this
+ // Target on this testing platform (i.e., checking the iOS targets
+ // only on a Mac test platform).
+ let _ = $module::target().map(|original| {
+ let as_json = original.to_json();
+ let parsed = Target::from_json(as_json).unwrap();
+ assert_eq!(original, parsed);
+ });
}
)*
-
- None
}
)
}
("powerpc64le-unknown-linux-gnu", powerpc64le_unknown_linux_gnu),
("arm-unknown-linux-gnueabi", arm_unknown_linux_gnueabi),
("arm-unknown-linux-gnueabihf", arm_unknown_linux_gnueabihf),
+ ("arm-unknown-linux-musleabi", arm_unknown_linux_musleabi),
+ ("arm-unknown-linux-musleabihf", arm_unknown_linux_musleabihf),
("armv7-unknown-linux-gnueabihf", armv7_unknown_linux_gnueabihf),
+ ("armv7-unknown-linux-musleabihf", armv7_unknown_linux_musleabihf),
("aarch64-unknown-linux-gnu", aarch64_unknown_linux_gnu),
("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
("i686-unknown-linux-musl", i686_unknown_linux_musl),
/// Everything `rustc` knows about how to compile for a specific target.
///
/// Every field here must be specified, and has no default value.
-#[derive(Clone, Debug)]
+#[derive(PartialEq, Clone, Debug)]
pub struct Target {
/// Target triple to pass to LLVM.
pub llvm_target: String,
///
/// This has an implementation of `Default`, see each field for what the default is. In general,
/// these try to take "minimal defaults" that don't assume anything about the runtime they run in.
-#[derive(Clone, Debug)]
+#[derive(PartialEq, Clone, Debug)]
pub struct TargetOptions {
/// Whether the target is built-in or loaded from a custom target specification.
pub is_builtin: bool,
pub is_like_android: bool,
/// Whether the linker support GNU-like arguments such as -O. Defaults to false.
pub linker_is_gnu: bool,
+ /// The MinGW toolchain has a known issue that prevents it from correctly
+ /// handling COFF object files with more than 2^15 sections. Since each weak
+ /// symbol needs its own COMDAT section, weak linkage implies a large
+ /// number sections that easily exceeds the given limit for larger
+ /// codebases. Consequently we want a way to disallow weak linkage on some
+ /// platforms.
+ pub allows_weak_linkage: bool,
/// Whether the linker support rpaths or not. Defaults to false.
pub has_rpath: bool,
/// Whether to disable linking to compiler-rt. Defaults to false, as LLVM
is_like_android: false,
is_like_msvc: false,
linker_is_gnu: false,
+ allows_weak_linkage: true,
has_rpath: false,
no_compiler_rt: false,
no_default_libraries: true,
}
/// Load a target descriptor from a JSON object.
- pub fn from_json(obj: Json) -> Target {
- // this is 1. ugly, 2. error prone.
+ pub fn from_json(obj: Json) -> TargetResult {
+ // While ugly, this code must remain this way to retain
+ // compatibility with existing JSON fields and the internal
+ // expected naming of the Target and TargetOptions structs.
+ // To ensure compatibility is retained, the built-in targets
+ // are round-tripped through this code to catch cases where
+ // the JSON parser is not updated to match the structs.
let get_req_field = |name: &str| {
match obj.find(name)
.map(|s| s.as_string())
.and_then(|os| os.map(|s| s.to_string())) {
- Some(val) => val,
+ Some(val) => Ok(val),
None => {
- panic!("Field {} in target specification is required", name)
+ return Err(format!("Field {} in target specification is required", name))
}
}
};
};
let mut base = Target {
- llvm_target: get_req_field("llvm-target"),
- target_endian: get_req_field("target-endian"),
- target_pointer_width: get_req_field("target-pointer-width"),
- data_layout: get_req_field("data-layout"),
- arch: get_req_field("arch"),
- target_os: get_req_field("os"),
+ llvm_target: try!(get_req_field("llvm-target")),
+ target_endian: try!(get_req_field("target-endian")),
+ target_pointer_width: try!(get_req_field("target-pointer-width")),
+ data_layout: try!(get_req_field("data-layout")),
+ arch: try!(get_req_field("arch")),
+ target_os: try!(get_req_field("os")),
target_env: get_opt_field("env", ""),
target_vendor: get_opt_field("vendor", "unknown"),
options: Default::default(),
} );
}
- key!(cpu);
- key!(ar);
+ key!(is_builtin, bool);
key!(linker);
+ key!(ar);
+ key!(pre_link_args, list);
+ key!(pre_link_objects_exe, list);
+ key!(pre_link_objects_dll, list);
+ key!(late_link_args, list);
+ key!(post_link_objects, list);
+ key!(post_link_args, list);
+ key!(cpu);
+ key!(features);
+ key!(dynamic_linking, bool);
+ key!(executables, bool);
key!(relocation_model);
key!(code_model);
+ key!(disable_redzone, bool);
+ key!(eliminate_frame_pointer, bool);
+ key!(function_sections, bool);
key!(dll_prefix);
key!(dll_suffix);
key!(exe_suffix);
key!(staticlib_prefix);
key!(staticlib_suffix);
- key!(features);
- key!(dynamic_linking, bool);
- key!(executables, bool);
- key!(disable_redzone, bool);
- key!(eliminate_frame_pointer, bool);
- key!(function_sections, bool);
key!(target_family, optional);
key!(is_like_osx, bool);
+ key!(is_like_solaris, bool);
key!(is_like_windows, bool);
key!(is_like_msvc, bool);
+ key!(is_like_android, bool);
key!(linker_is_gnu, bool);
+ key!(allows_weak_linkage, bool);
key!(has_rpath, bool);
key!(no_compiler_rt, bool);
key!(no_default_libraries, bool);
- key!(pre_link_args, list);
- key!(post_link_args, list);
+ key!(position_independent_executables, bool);
key!(archive_format);
key!(allow_asm, bool);
key!(custom_unwind_resume, bool);
+ key!(lib_allocation_crate);
+ key!(exe_allocation_crate);
+ key!(has_elf_tls, bool);
+ key!(obj_is_bitcode, bool);
key!(max_atomic_width, u64);
- base
+ Ok(base)
}
/// Search RUST_TARGET_PATH for a JSON file specifying the given target
f.read_to_end(&mut contents).map_err(|e| e.to_string())?;
let obj = json::from_reader(&mut &contents[..])
.map_err(|e| e.to_string())?;
- Ok(Target::from_json(obj))
+ Target::from_json(obj)
}
- if let Some(t) = load_specific(target) {
+ if let Ok(t) = load_specific(target) {
return Ok(t)
}
}
}
+impl ToJson for Target {
+ fn to_json(&self) -> Json {
+ let mut d = BTreeMap::new();
+ let default: TargetOptions = Default::default();
+
+ macro_rules! target_val {
+ ($attr:ident) => ( {
+ let name = (stringify!($attr)).replace("_", "-");
+ d.insert(name.to_string(), self.$attr.to_json());
+ } );
+ ($attr:ident, $key_name:expr) => ( {
+ let name = $key_name;
+ d.insert(name.to_string(), self.$attr.to_json());
+ } );
+ }
+
+ macro_rules! target_option_val {
+ ($attr:ident) => ( {
+ let name = (stringify!($attr)).replace("_", "-");
+ if default.$attr != self.options.$attr {
+ d.insert(name.to_string(), self.options.$attr.to_json());
+ }
+ } );
+ ($attr:ident, $key_name:expr) => ( {
+ let name = $key_name;
+ if default.$attr != self.options.$attr {
+ d.insert(name.to_string(), self.options.$attr.to_json());
+ }
+ } );
+ }
+
+ target_val!(llvm_target);
+ target_val!(target_endian);
+ target_val!(target_pointer_width);
+ target_val!(arch);
+ target_val!(target_os, "os");
+ target_val!(target_env, "env");
+ target_val!(target_vendor, "vendor");
+ target_val!(arch);
+ target_val!(data_layout);
+
+ target_option_val!(is_builtin);
+ target_option_val!(linker);
+ target_option_val!(ar);
+ target_option_val!(pre_link_args);
+ target_option_val!(pre_link_objects_exe);
+ target_option_val!(pre_link_objects_dll);
+ target_option_val!(late_link_args);
+ target_option_val!(post_link_objects);
+ target_option_val!(post_link_args);
+ target_option_val!(cpu);
+ target_option_val!(features);
+ target_option_val!(dynamic_linking);
+ target_option_val!(executables);
+ target_option_val!(relocation_model);
+ target_option_val!(code_model);
+ target_option_val!(disable_redzone);
+ target_option_val!(eliminate_frame_pointer);
+ target_option_val!(function_sections);
+ target_option_val!(dll_prefix);
+ target_option_val!(dll_suffix);
+ target_option_val!(exe_suffix);
+ target_option_val!(staticlib_prefix);
+ target_option_val!(staticlib_suffix);
+ target_option_val!(target_family);
+ target_option_val!(is_like_osx);
+ target_option_val!(is_like_solaris);
+ target_option_val!(is_like_windows);
+ target_option_val!(is_like_msvc);
+ target_option_val!(is_like_android);
+ target_option_val!(linker_is_gnu);
+ target_option_val!(allows_weak_linkage);
+ target_option_val!(has_rpath);
+ target_option_val!(no_compiler_rt);
+ target_option_val!(no_default_libraries);
+ target_option_val!(position_independent_executables);
+ target_option_val!(archive_format);
+ target_option_val!(allow_asm);
+ target_option_val!(custom_unwind_resume);
+ target_option_val!(lib_allocation_crate);
+ target_option_val!(exe_allocation_crate);
+ target_option_val!(has_elf_tls);
+ target_option_val!(obj_is_bitcode);
+ target_option_val!(max_atomic_width);
+
+ Json::Object(d)
+ }
+}
+
fn maybe_jemalloc() -> String {
if cfg!(feature = "jemalloc") {
"alloc_jemalloc".to_string()
projects / rustc.git / blobdiff