/
config.rs
1484 lines (1354 loc) · 57.2 KB
/
config.rs
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// 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.
//! Contains infrastructure for configuring the compiler, including parsing
//! command line options.
pub use self::EntryFnType::*;
pub use self::CrateType::*;
pub use self::Passes::*;
pub use self::DebugInfoLevel::*;
use session::{early_error, early_warn, Session};
use session::search_paths::SearchPaths;
use rustc_back::target::Target;
use lint;
use middle::cstore;
use syntax::ast::{self, IntTy, UintTy};
use syntax::attr;
use syntax::attr::AttrMetaMethods;
use syntax::errors::{ColorConfig, Handler};
use syntax::parse;
use syntax::parse::token::InternedString;
use syntax::feature_gate::UnstableFeatures;
use getopts;
use std::collections::HashMap;
use std::env;
use std::fmt;
use std::path::PathBuf;
pub struct Config {
pub target: Target,
pub int_type: IntTy,
pub uint_type: UintTy,
}
#[derive(Clone, Copy, PartialEq)]
pub enum OptLevel {
No, // -O0
Less, // -O1
Default, // -O2
Aggressive, // -O3
Size, // -Os
SizeMin, // -Oz
}
#[derive(Clone, Copy, PartialEq)]
pub enum DebugInfoLevel {
NoDebugInfo,
LimitedDebugInfo,
FullDebugInfo,
}
#[derive(Clone, Copy, PartialEq, Eq, Hash)]
pub enum OutputType {
Bitcode,
Assembly,
LlvmAssembly,
Object,
Exe,
DepInfo,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum ErrorOutputType {
HumanReadable(ColorConfig),
Json,
}
impl Default for ErrorOutputType {
fn default() -> ErrorOutputType {
ErrorOutputType::HumanReadable(ColorConfig::Auto)
}
}
impl OutputType {
fn is_compatible_with_codegen_units_and_single_output_file(&self) -> bool {
match *self {
OutputType::Exe |
OutputType::DepInfo => true,
OutputType::Bitcode |
OutputType::Assembly |
OutputType::LlvmAssembly |
OutputType::Object => false,
}
}
fn shorthand(&self) -> &'static str {
match *self {
OutputType::Bitcode => "llvm-bc",
OutputType::Assembly => "asm",
OutputType::LlvmAssembly => "llvm-ir",
OutputType::Object => "obj",
OutputType::Exe => "link",
OutputType::DepInfo => "dep-info",
}
}
}
#[derive(Clone)]
pub struct Options {
// The crate config requested for the session, which may be combined
// with additional crate configurations during the compile process
pub crate_types: Vec<CrateType>,
pub gc: bool,
pub optimize: OptLevel,
pub debug_assertions: bool,
pub debuginfo: DebugInfoLevel,
pub lint_opts: Vec<(String, lint::Level)>,
pub lint_cap: Option<lint::Level>,
pub describe_lints: bool,
pub output_types: HashMap<OutputType, Option<PathBuf>>,
// This was mutable for rustpkg, which updates search paths based on the
// parsed code. It remains mutable in case its replacements wants to use
// this.
pub search_paths: SearchPaths,
pub libs: Vec<(String, cstore::NativeLibraryKind)>,
pub maybe_sysroot: Option<PathBuf>,
pub target_triple: String,
// User-specified cfg meta items. The compiler itself will add additional
// items to the crate config, and during parsing the entire crate config
// will be added to the crate AST node. This should not be used for
// anything except building the full crate config prior to parsing.
pub cfg: ast::CrateConfig,
pub test: bool,
pub parse_only: bool,
pub no_trans: bool,
pub error_format: ErrorOutputType,
pub treat_err_as_bug: bool,
pub continue_parse_after_error: bool,
pub mir_opt_level: usize,
/// if Some, enable incremental compilation, using the given
/// directory to store intermediate results
pub incremental: Option<PathBuf>,
pub no_analysis: bool,
pub debugging_opts: DebuggingOptions,
pub prints: Vec<PrintRequest>,
pub cg: CodegenOptions,
pub externs: HashMap<String, Vec<String>>,
pub crate_name: Option<String>,
/// An optional name to use as the crate for std during std injection,
/// written `extern crate std = "name"`. Default to "std". Used by
/// out-of-tree drivers.
pub alt_std_name: Option<String>,
/// Indicates how the compiler should treat unstable features
pub unstable_features: UnstableFeatures
}
#[derive(Clone, PartialEq, Eq)]
pub enum PrintRequest {
FileNames,
Sysroot,
CrateName,
Cfg,
TargetList,
}
pub enum Input {
/// Load source from file
File(PathBuf),
Str {
/// String that is shown in place of a filename
name: String,
/// Anonymous source string
input: String,
},
}
impl Input {
pub fn filestem(&self) -> String {
match *self {
Input::File(ref ifile) => ifile.file_stem().unwrap()
.to_str().unwrap().to_string(),
Input::Str { .. } => "rust_out".to_string(),
}
}
}
#[derive(Clone)]
pub struct OutputFilenames {
pub out_directory: PathBuf,
pub out_filestem: String,
pub single_output_file: Option<PathBuf>,
pub extra: String,
pub outputs: HashMap<OutputType, Option<PathBuf>>,
}
impl OutputFilenames {
pub fn path(&self, flavor: OutputType) -> PathBuf {
self.outputs.get(&flavor).and_then(|p| p.to_owned())
.or_else(|| self.single_output_file.clone())
.unwrap_or_else(|| self.temp_path(flavor))
}
pub fn temp_path(&self, flavor: OutputType) -> PathBuf {
let base = self.out_directory.join(&self.filestem());
match flavor {
OutputType::Bitcode => base.with_extension("bc"),
OutputType::Assembly => base.with_extension("s"),
OutputType::LlvmAssembly => base.with_extension("ll"),
OutputType::Object => base.with_extension("o"),
OutputType::DepInfo => base.with_extension("d"),
OutputType::Exe => base,
}
}
pub fn with_extension(&self, extension: &str) -> PathBuf {
self.out_directory.join(&self.filestem()).with_extension(extension)
}
pub fn filestem(&self) -> String {
format!("{}{}", self.out_filestem, self.extra)
}
}
pub fn host_triple() -> &'static str {
// Get the host triple out of the build environment. This ensures that our
// idea of the host triple is the same as for the set of libraries we've
// actually built. We can't just take LLVM's host triple because they
// normalize all ix86 architectures to i386.
//
// Instead of grabbing the host triple (for the current host), we grab (at
// compile time) the target triple that this rustc is built with and
// calling that (at runtime) the host triple.
(option_env!("CFG_COMPILER_HOST_TRIPLE")).
expect("CFG_COMPILER_HOST_TRIPLE")
}
/// Some reasonable defaults
pub fn basic_options() -> Options {
Options {
crate_types: Vec::new(),
gc: false,
optimize: OptLevel::No,
debuginfo: NoDebugInfo,
lint_opts: Vec::new(),
lint_cap: None,
describe_lints: false,
output_types: HashMap::new(),
search_paths: SearchPaths::new(),
maybe_sysroot: None,
target_triple: host_triple().to_string(),
cfg: Vec::new(),
test: false,
parse_only: false,
no_trans: false,
treat_err_as_bug: false,
continue_parse_after_error: false,
mir_opt_level: 1,
incremental: None,
no_analysis: false,
debugging_opts: basic_debugging_options(),
prints: Vec::new(),
cg: basic_codegen_options(),
error_format: ErrorOutputType::default(),
externs: HashMap::new(),
crate_name: None,
alt_std_name: None,
libs: Vec::new(),
unstable_features: UnstableFeatures::Disallow,
debug_assertions: true,
}
}
impl Options {
/// True if there is a reason to build the dep graph.
pub fn build_dep_graph(&self) -> bool {
self.incremental.is_some() ||
self.debugging_opts.dump_dep_graph ||
self.debugging_opts.query_dep_graph
}
}
// The type of entry function, so
// users can have their own entry
// functions that don't start a
// scheduler
#[derive(Copy, Clone, PartialEq)]
pub enum EntryFnType {
EntryMain,
EntryStart,
EntryNone,
}
#[derive(Copy, PartialEq, PartialOrd, Clone, Ord, Eq, Hash, Debug)]
pub enum CrateType {
CrateTypeExecutable,
CrateTypeDylib,
CrateTypeRlib,
CrateTypeStaticlib,
}
#[derive(Clone)]
pub enum Passes {
SomePasses(Vec<String>),
AllPasses,
}
impl Passes {
pub fn is_empty(&self) -> bool {
match *self {
SomePasses(ref v) => v.is_empty(),
AllPasses => false,
}
}
}
/// Declare a macro that will define all CodegenOptions/DebuggingOptions fields and parsers all
/// at once. The goal of this macro is to define an interface that can be
/// programmatically used by the option parser in order to initialize the struct
/// without hardcoding field names all over the place.
///
/// The goal is to invoke this macro once with the correct fields, and then this
/// macro generates all necessary code. The main gotcha of this macro is the
/// cgsetters module which is a bunch of generated code to parse an option into
/// its respective field in the struct. There are a few hand-written parsers for
/// parsing specific types of values in this module.
macro_rules! options {
($struct_name:ident, $setter_name:ident, $defaultfn:ident,
$buildfn:ident, $prefix:expr, $outputname:expr,
$stat:ident, $mod_desc:ident, $mod_set:ident,
$($opt:ident : $t:ty = ($init:expr, $parse:ident, $desc:expr)),* ,) =>
(
#[derive(Clone)]
pub struct $struct_name { $(pub $opt: $t),* }
pub fn $defaultfn() -> $struct_name {
$struct_name { $($opt: $init),* }
}
pub fn $buildfn(matches: &getopts::Matches, error_format: ErrorOutputType) -> $struct_name
{
let mut op = $defaultfn();
for option in matches.opt_strs($prefix) {
let mut iter = option.splitn(2, '=');
let key = iter.next().unwrap();
let value = iter.next();
let option_to_lookup = key.replace("-", "_");
let mut found = false;
for &(candidate, setter, opt_type_desc, _) in $stat {
if option_to_lookup != candidate { continue }
if !setter(&mut op, value) {
match (value, opt_type_desc) {
(Some(..), None) => {
early_error(error_format, &format!("{} option `{}` takes no \
value", $outputname, key))
}
(None, Some(type_desc)) => {
early_error(error_format, &format!("{0} option `{1}` requires \
{2} ({3} {1}=<value>)",
$outputname, key,
type_desc, $prefix))
}
(Some(value), Some(type_desc)) => {
early_error(error_format, &format!("incorrect value `{}` for {} \
option `{}` - {} was expected",
value, $outputname,
key, type_desc))
}
(None, None) => bug!()
}
}
found = true;
break;
}
if !found {
early_error(error_format, &format!("unknown {} option: `{}`",
$outputname, key));
}
}
return op;
}
pub type $setter_name = fn(&mut $struct_name, v: Option<&str>) -> bool;
pub const $stat: &'static [(&'static str, $setter_name,
Option<&'static str>, &'static str)] =
&[ $( (stringify!($opt), $mod_set::$opt, $mod_desc::$parse, $desc) ),* ];
#[allow(non_upper_case_globals, dead_code)]
mod $mod_desc {
pub const parse_bool: Option<&'static str> = None;
pub const parse_opt_bool: Option<&'static str> =
Some("one of: `y`, `yes`, `on`, `n`, `no`, or `off`");
pub const parse_string: Option<&'static str> = Some("a string");
pub const parse_opt_string: Option<&'static str> = Some("a string");
pub const parse_list: Option<&'static str> = Some("a space-separated list of strings");
pub const parse_opt_list: Option<&'static str> = Some("a space-separated list of strings");
pub const parse_uint: Option<&'static str> = Some("a number");
pub const parse_passes: Option<&'static str> =
Some("a space-separated list of passes, or `all`");
pub const parse_opt_uint: Option<&'static str> =
Some("a number");
}
#[allow(dead_code)]
mod $mod_set {
use super::{$struct_name, Passes, SomePasses, AllPasses};
$(
pub fn $opt(cg: &mut $struct_name, v: Option<&str>) -> bool {
$parse(&mut cg.$opt, v)
}
)*
fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
match v {
Some(..) => false,
None => { *slot = true; true }
}
}
fn parse_opt_bool(slot: &mut Option<bool>, v: Option<&str>) -> bool {
match v {
Some(s) => {
match s {
"n" | "no" | "off" => {
*slot = Some(false);
}
"y" | "yes" | "on" => {
*slot = Some(true);
}
_ => { return false; }
}
true
},
None => { *slot = Some(true); true }
}
}
fn parse_opt_string(slot: &mut Option<String>, v: Option<&str>) -> bool {
match v {
Some(s) => { *slot = Some(s.to_string()); true },
None => false,
}
}
fn parse_string(slot: &mut String, v: Option<&str>) -> bool {
match v {
Some(s) => { *slot = s.to_string(); true },
None => false,
}
}
fn parse_list(slot: &mut Vec<String>, v: Option<&str>)
-> bool {
match v {
Some(s) => {
for s in s.split_whitespace() {
slot.push(s.to_string());
}
true
},
None => false,
}
}
fn parse_opt_list(slot: &mut Option<Vec<String>>, v: Option<&str>)
-> bool {
match v {
Some(s) => {
let v = s.split_whitespace().map(|s| s.to_string()).collect();
*slot = Some(v);
true
},
None => false,
}
}
fn parse_uint(slot: &mut usize, v: Option<&str>) -> bool {
match v.and_then(|s| s.parse().ok()) {
Some(i) => { *slot = i; true },
None => false
}
}
fn parse_opt_uint(slot: &mut Option<usize>, v: Option<&str>) -> bool {
match v {
Some(s) => { *slot = s.parse().ok(); slot.is_some() }
None => { *slot = None; true }
}
}
fn parse_passes(slot: &mut Passes, v: Option<&str>) -> bool {
match v {
Some("all") => {
*slot = AllPasses;
true
}
v => {
let mut passes = vec!();
if parse_list(&mut passes, v) {
*slot = SomePasses(passes);
true
} else {
false
}
}
}
}
}
) }
options! {CodegenOptions, CodegenSetter, basic_codegen_options,
build_codegen_options, "C", "codegen",
CG_OPTIONS, cg_type_desc, cgsetters,
ar: Option<String> = (None, parse_opt_string,
"tool to assemble archives with"),
linker: Option<String> = (None, parse_opt_string,
"system linker to link outputs with"),
link_args: Option<Vec<String>> = (None, parse_opt_list,
"extra arguments to pass to the linker (space separated)"),
link_dead_code: bool = (false, parse_bool,
"don't let linker strip dead code (turning it on can be used for code coverage)"),
lto: bool = (false, parse_bool,
"perform LLVM link-time optimizations"),
target_cpu: Option<String> = (None, parse_opt_string,
"select target processor (llc -mcpu=help for details)"),
target_feature: String = ("".to_string(), parse_string,
"target specific attributes (llc -mattr=help for details)"),
passes: Vec<String> = (Vec::new(), parse_list,
"a list of extra LLVM passes to run (space separated)"),
llvm_args: Vec<String> = (Vec::new(), parse_list,
"a list of arguments to pass to llvm (space separated)"),
save_temps: bool = (false, parse_bool,
"save all temporary output files during compilation"),
rpath: bool = (false, parse_bool,
"set rpath values in libs/exes"),
no_prepopulate_passes: bool = (false, parse_bool,
"don't pre-populate the pass manager with a list of passes"),
no_vectorize_loops: bool = (false, parse_bool,
"don't run the loop vectorization optimization passes"),
no_vectorize_slp: bool = (false, parse_bool,
"don't run LLVM's SLP vectorization pass"),
soft_float: bool = (false, parse_bool,
"generate software floating point library calls"),
prefer_dynamic: bool = (false, parse_bool,
"prefer dynamic linking to static linking"),
no_integrated_as: bool = (false, parse_bool,
"use an external assembler rather than LLVM's integrated one"),
no_redzone: Option<bool> = (None, parse_opt_bool,
"disable the use of the redzone"),
relocation_model: Option<String> = (None, parse_opt_string,
"choose the relocation model to use (llc -relocation-model for details)"),
code_model: Option<String> = (None, parse_opt_string,
"choose the code model to use (llc -code-model for details)"),
metadata: Vec<String> = (Vec::new(), parse_list,
"metadata to mangle symbol names with"),
extra_filename: String = ("".to_string(), parse_string,
"extra data to put in each output filename"),
codegen_units: usize = (1, parse_uint,
"divide crate into N units to optimize in parallel"),
remark: Passes = (SomePasses(Vec::new()), parse_passes,
"print remarks for these optimization passes (space separated, or \"all\")"),
no_stack_check: bool = (false, parse_bool,
"disable checks for stack exhaustion (a memory-safety hazard!)"),
debuginfo: Option<usize> = (None, parse_opt_uint,
"debug info emission level, 0 = no debug info, 1 = line tables only, \
2 = full debug info with variable and type information"),
opt_level: Option<String> = (None, parse_opt_string,
"optimize with possible levels 0-3, s, or z"),
debug_assertions: Option<bool> = (None, parse_opt_bool,
"explicitly enable the cfg(debug_assertions) directive"),
inline_threshold: Option<usize> = (None, parse_opt_uint,
"set the inlining threshold for"),
}
options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
build_debugging_options, "Z", "debugging",
DB_OPTIONS, db_type_desc, dbsetters,
verbose: bool = (false, parse_bool,
"in general, enable more debug printouts"),
time_passes: bool = (false, parse_bool,
"measure time of each rustc pass"),
count_llvm_insns: bool = (false, parse_bool,
"count where LLVM instrs originate"),
time_llvm_passes: bool = (false, parse_bool,
"measure time of each LLVM pass"),
input_stats: bool = (false, parse_bool,
"gather statistics about the input"),
trans_stats: bool = (false, parse_bool,
"gather trans statistics"),
asm_comments: bool = (false, parse_bool,
"generate comments into the assembly (may change behavior)"),
no_verify: bool = (false, parse_bool,
"skip LLVM verification"),
borrowck_stats: bool = (false, parse_bool,
"gather borrowck statistics"),
no_landing_pads: bool = (false, parse_bool,
"omit landing pads for unwinding"),
debug_llvm: bool = (false, parse_bool,
"enable debug output from LLVM"),
count_type_sizes: bool = (false, parse_bool,
"count the sizes of aggregate types"),
meta_stats: bool = (false, parse_bool,
"gather metadata statistics"),
print_link_args: bool = (false, parse_bool,
"print the arguments passed to the linker"),
gc: bool = (false, parse_bool,
"garbage collect shared data (experimental)"),
print_llvm_passes: bool = (false, parse_bool,
"prints the llvm optimization passes being run"),
ast_json: bool = (false, parse_bool,
"print the AST as JSON and halt"),
ast_json_noexpand: bool = (false, parse_bool,
"print the pre-expansion AST as JSON and halt"),
ls: bool = (false, parse_bool,
"list the symbols defined by a library crate"),
save_analysis: bool = (false, parse_bool,
"write syntax and type analysis (in JSON format) information in addition to normal output"),
save_analysis_csv: bool = (false, parse_bool,
"write syntax and type analysis (in CSV format) information in addition to normal output"),
print_move_fragments: bool = (false, parse_bool,
"print out move-fragment data for every fn"),
flowgraph_print_loans: bool = (false, parse_bool,
"include loan analysis data in --unpretty flowgraph output"),
flowgraph_print_moves: bool = (false, parse_bool,
"include move analysis data in --unpretty flowgraph output"),
flowgraph_print_assigns: bool = (false, parse_bool,
"include assignment analysis data in --unpretty flowgraph output"),
flowgraph_print_all: bool = (false, parse_bool,
"include all dataflow analysis data in --unpretty flowgraph output"),
print_region_graph: bool = (false, parse_bool,
"prints region inference graph. \
Use with RUST_REGION_GRAPH=help for more info"),
parse_only: bool = (false, parse_bool,
"parse only; do not compile, assemble, or link"),
no_trans: bool = (false, parse_bool,
"run all passes except translation; no output"),
treat_err_as_bug: bool = (false, parse_bool,
"treat all errors that occur as bugs"),
continue_parse_after_error: bool = (false, parse_bool,
"attempt to recover from parse errors (experimental)"),
incremental: Option<String> = (None, parse_opt_string,
"enable incremental compilation (experimental)"),
dump_dep_graph: bool = (false, parse_bool,
"dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv)"),
query_dep_graph: bool = (false, parse_bool,
"enable queries of the dependency graph for regression testing"),
no_analysis: bool = (false, parse_bool,
"parse and expand the source, but run no analysis"),
extra_plugins: Vec<String> = (Vec::new(), parse_list,
"load extra plugins"),
unstable_options: bool = (false, parse_bool,
"adds unstable command line options to rustc interface"),
print_enum_sizes: bool = (false, parse_bool,
"print the size of enums and their variants"),
force_overflow_checks: Option<bool> = (None, parse_opt_bool,
"force overflow checks on or off"),
force_dropflag_checks: Option<bool> = (None, parse_opt_bool,
"force drop flag checks on or off"),
trace_macros: bool = (false, parse_bool,
"for every macro invocation, print its name and arguments"),
enable_nonzeroing_move_hints: bool = (false, parse_bool,
"force nonzeroing move optimization on"),
keep_mtwt_tables: bool = (false, parse_bool,
"don't clear the resolution tables after analysis"),
keep_ast: bool = (false, parse_bool,
"keep the AST after lowering it to HIR"),
show_span: Option<String> = (None, parse_opt_string,
"show spans for compiler debugging (expr|pat|ty)"),
print_trans_items: Option<String> = (None, parse_opt_string,
"print the result of the translation item collection pass"),
mir_opt_level: Option<usize> = (None, parse_opt_uint,
"set the MIR optimization level (0-3)"),
dump_mir: Option<String> = (None, parse_opt_string,
"dump MIR state at various points in translation"),
orbit: bool = (false, parse_bool,
"get MIR where it belongs - everywhere; most importantly, in orbit"),
}
pub fn default_lib_output() -> CrateType {
CrateTypeRlib
}
pub fn default_configuration(sess: &Session) -> ast::CrateConfig {
use syntax::parse::token::intern_and_get_ident as intern;
let end = &sess.target.target.target_endian;
let arch = &sess.target.target.arch;
let wordsz = &sess.target.target.target_pointer_width;
let os = &sess.target.target.target_os;
let env = &sess.target.target.target_env;
let vendor = &sess.target.target.target_vendor;
let max_atomic_width = sess.target.target.options.max_atomic_width;
let fam = if let Some(ref fam) = sess.target.target.options.target_family {
intern(fam)
} else if sess.target.target.options.is_like_windows {
InternedString::new("windows")
} else {
InternedString::new("unix")
};
let mk = attr::mk_name_value_item_str;
let mut ret = vec![ // Target bindings.
mk(InternedString::new("target_os"), intern(os)),
mk(InternedString::new("target_family"), fam.clone()),
mk(InternedString::new("target_arch"), intern(arch)),
mk(InternedString::new("target_endian"), intern(end)),
mk(InternedString::new("target_pointer_width"), intern(wordsz)),
mk(InternedString::new("target_env"), intern(env)),
mk(InternedString::new("target_vendor"), intern(vendor)),
];
match &fam[..] {
"windows" | "unix" => ret.push(attr::mk_word_item(fam)),
_ => (),
}
if sess.target.target.options.has_elf_tls {
ret.push(attr::mk_word_item(InternedString::new("target_thread_local")));
}
for &i in &[8, 16, 32, 64, 128] {
if i <= max_atomic_width {
let s = i.to_string();
ret.push(mk(InternedString::new("target_has_atomic"), intern(&s)));
if &s == wordsz {
ret.push(mk(InternedString::new("target_has_atomic"), intern("ptr")));
}
}
}
if sess.opts.debug_assertions {
ret.push(attr::mk_word_item(InternedString::new("debug_assertions")));
}
return ret;
}
pub fn append_configuration(cfg: &mut ast::CrateConfig,
name: InternedString) {
if !cfg.iter().any(|mi| mi.name() == name) {
cfg.push(attr::mk_word_item(name))
}
}
pub fn build_configuration(sess: &Session) -> ast::CrateConfig {
// Combine the configuration requested by the session (command line) with
// some default and generated configuration items
let default_cfg = default_configuration(sess);
let mut user_cfg = sess.opts.cfg.clone();
// If the user wants a test runner, then add the test cfg
if sess.opts.test {
append_configuration(&mut user_cfg, InternedString::new("test"))
}
let mut v = user_cfg.into_iter().collect::<Vec<_>>();
v.extend_from_slice(&default_cfg[..]);
v
}
pub fn build_target_config(opts: &Options, sp: &Handler) -> Config {
let target = match Target::search(&opts.target_triple) {
Ok(t) => t,
Err(e) => {
panic!(sp.fatal(&format!("Error loading target specification: {}", e)));
}
};
let (int_type, uint_type) = match &target.target_pointer_width[..] {
"32" => (ast::IntTy::I32, ast::UintTy::U32),
"64" => (ast::IntTy::I64, ast::UintTy::U64),
w => panic!(sp.fatal(&format!("target specification was invalid: \
unrecognized target-pointer-width {}", w))),
};
Config {
target: target,
int_type: int_type,
uint_type: uint_type,
}
}
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub enum OptionStability {
Stable,
// FIXME: historically there were some options which were either `-Z` or
// required the `-Z unstable-options` flag, which were all intended
// to be unstable. Unfortunately we didn't actually gate usage of
// these options on the stable compiler, so we still allow them there
// today. There are some warnings printed out about this in the
// driver.
UnstableButNotReally,
Unstable,
}
#[derive(Clone, PartialEq, Eq)]
pub struct RustcOptGroup {
pub opt_group: getopts::OptGroup,
pub stability: OptionStability,
}
impl RustcOptGroup {
pub fn is_stable(&self) -> bool {
self.stability == OptionStability::Stable
}
pub fn stable(g: getopts::OptGroup) -> RustcOptGroup {
RustcOptGroup { opt_group: g, stability: OptionStability::Stable }
}
#[allow(dead_code)] // currently we have no "truly unstable" options
pub fn unstable(g: getopts::OptGroup) -> RustcOptGroup {
RustcOptGroup { opt_group: g, stability: OptionStability::Unstable }
}
fn unstable_bnr(g: getopts::OptGroup) -> RustcOptGroup {
RustcOptGroup {
opt_group: g,
stability: OptionStability::UnstableButNotReally,
}
}
}
// The `opt` local module holds wrappers around the `getopts` API that
// adds extra rustc-specific metadata to each option; such metadata
// is exposed by . The public
// functions below ending with `_u` are the functions that return
// *unstable* options, i.e. options that are only enabled when the
// user also passes the `-Z unstable-options` debugging flag.
mod opt {
// The `fn opt_u` etc below are written so that we can use them
// in the future; do not warn about them not being used right now.
#![allow(dead_code)]
use getopts;
use super::RustcOptGroup;
pub type R = RustcOptGroup;
pub type S<'a> = &'a str;
fn stable(g: getopts::OptGroup) -> R { RustcOptGroup::stable(g) }
fn unstable(g: getopts::OptGroup) -> R { RustcOptGroup::unstable(g) }
fn unstable_bnr(g: getopts::OptGroup) -> R { RustcOptGroup::unstable_bnr(g) }
pub fn opt_s(a: S, b: S, c: S, d: S) -> R {
stable(getopts::optopt(a, b, c, d))
}
pub fn multi_s(a: S, b: S, c: S, d: S) -> R {
stable(getopts::optmulti(a, b, c, d))
}
pub fn flag_s(a: S, b: S, c: S) -> R {
stable(getopts::optflag(a, b, c))
}
pub fn flagopt_s(a: S, b: S, c: S, d: S) -> R {
stable(getopts::optflagopt(a, b, c, d))
}
pub fn flagmulti_s(a: S, b: S, c: S) -> R {
stable(getopts::optflagmulti(a, b, c))
}
pub fn opt(a: S, b: S, c: S, d: S) -> R {
unstable(getopts::optopt(a, b, c, d))
}
pub fn multi(a: S, b: S, c: S, d: S) -> R {
unstable(getopts::optmulti(a, b, c, d))
}
pub fn flag(a: S, b: S, c: S) -> R {
unstable(getopts::optflag(a, b, c))
}
pub fn flagopt(a: S, b: S, c: S, d: S) -> R {
unstable(getopts::optflagopt(a, b, c, d))
}
pub fn flagmulti(a: S, b: S, c: S) -> R {
unstable(getopts::optflagmulti(a, b, c))
}
// Do not use these functions for any new options added to the compiler, all
// new options should use the `*_u` variants above to be truly unstable.
pub fn opt_ubnr(a: S, b: S, c: S, d: S) -> R {
unstable_bnr(getopts::optopt(a, b, c, d))
}
pub fn multi_ubnr(a: S, b: S, c: S, d: S) -> R {
unstable_bnr(getopts::optmulti(a, b, c, d))
}
pub fn flag_ubnr(a: S, b: S, c: S) -> R {
unstable_bnr(getopts::optflag(a, b, c))
}
pub fn flagopt_ubnr(a: S, b: S, c: S, d: S) -> R {
unstable_bnr(getopts::optflagopt(a, b, c, d))
}
pub fn flagmulti_ubnr(a: S, b: S, c: S) -> R {
unstable_bnr(getopts::optflagmulti(a, b, c))
}
}
/// Returns the "short" subset of the rustc command line options,
/// including metadata for each option, such as whether the option is
/// part of the stable long-term interface for rustc.
pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
vec![
opt::flag_s("h", "help", "Display this message"),
opt::multi_s("", "cfg", "Configure the compilation environment", "SPEC"),
opt::multi_s("L", "", "Add a directory to the library search path. The
optional KIND can be one of dependency, crate, native,
framework or all (the default).", "[KIND=]PATH"),
opt::multi_s("l", "", "Link the generated crate(s) to the specified native
library NAME. The optional KIND can be one of
static, dylib, or framework. If omitted, dylib is
assumed.", "[KIND=]NAME"),
opt::multi_s("", "crate-type", "Comma separated list of types of crates
for the compiler to emit",
"[bin|lib|rlib|dylib|staticlib]"),
opt::opt_s("", "crate-name", "Specify the name of the crate being built",
"NAME"),
opt::multi_s("", "emit", "Comma separated list of types of output for \
the compiler to emit",
"[asm|llvm-bc|llvm-ir|obj|link|dep-info]"),
opt::multi_s("", "print", "Comma separated list of compiler information to \
print on stdout",
"[crate-name|file-names|sysroot|cfg|target-list]"),
opt::flagmulti_s("g", "", "Equivalent to -C debuginfo=2"),
opt::flagmulti_s("O", "", "Equivalent to -C opt-level=2"),
opt::opt_s("o", "", "Write output to <filename>", "FILENAME"),
opt::opt_s("", "out-dir", "Write output to compiler-chosen filename \
in <dir>", "DIR"),
opt::opt_s("", "explain", "Provide a detailed explanation of an error \
message", "OPT"),
opt::flag_s("", "test", "Build a test harness"),
opt::opt_s("", "target", "Target triple for which the code is compiled", "TARGET"),
opt::multi_s("W", "warn", "Set lint warnings", "OPT"),
opt::multi_s("A", "allow", "Set lint allowed", "OPT"),
opt::multi_s("D", "deny", "Set lint denied", "OPT"),
opt::multi_s("F", "forbid", "Set lint forbidden", "OPT"),
opt::multi_s("", "cap-lints", "Set the most restrictive lint level. \
More restrictive lints are capped at this \
level", "LEVEL"),
opt::multi_s("C", "codegen", "Set a codegen option", "OPT[=VALUE]"),
opt::flag_s("V", "version", "Print version info and exit"),
opt::flag_s("v", "verbose", "Use verbose output"),
]
}
/// Returns all rustc command line options, including metadata for
/// each option, such as whether the option is part of the stable
/// long-term interface for rustc.
pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
let mut opts = rustc_short_optgroups();
opts.extend_from_slice(&[
opt::multi_s("", "extern", "Specify where an external rust library is located",
"NAME=PATH"),
opt::opt_s("", "sysroot", "Override the system root", "PATH"),
opt::multi_ubnr("Z", "", "Set internal debugging options", "FLAG"),
opt::opt_ubnr("", "error-format",
"How errors and other messages are produced",
"human|json"),
opt::opt_s("", "color", "Configure coloring of output:
auto = colorize, if output goes to a tty (default);
always = always colorize output;
never = never colorize output", "auto|always|never"),
opt::flagopt_ubnr("", "pretty",
"Pretty-print the input instead of compiling;
valid types are: `normal` (un-annotated source),
`expanded` (crates expanded), or
`expanded,identified` (fully parenthesized, AST nodes with IDs).",
"TYPE"),
opt::flagopt_ubnr("", "unpretty",
"Present the input source, unstable (and less-pretty) variants;
valid types are any of the types for `--pretty`, as well as:
`flowgraph=<nodeid>` (graphviz formatted flowgraph for node),
`everybody_loops` (all function bodies replaced with `loop {}`),
`hir` (the HIR), `hir,identified`, or
`hir,typed` (HIR with types for each node).",
"TYPE"),
// new options here should **not** use the `_ubnr` functions, all new
// unstable options should use the short variants to indicate that they
// are truly unstable. All `_ubnr` flags are just that way because they
// were so historically.
//
// You may also wish to keep this comment at the bottom of this list to
// ensure that others see it.
]);
opts
}
// Convert strings provided as --cfg [cfgspec] into a crate_cfg
pub fn parse_cfgspecs(cfgspecs: Vec<String> ) -> ast::CrateConfig {
cfgspecs.into_iter().map(|s| {
let sess = parse::ParseSess::new();
let mut parser = parse::new_parser_from_source_str(&sess,
Vec::new(),
"cfgspec".to_string(),
s.to_string());
let meta_item = panictry!(parser.parse_meta_item());
if !parser.reader.is_eof() {
early_error(ErrorOutputType::default(), &format!("invalid --cfg argument: {}",