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1 | #!/usr/bin/env bash |
2 | #![allow()] /*This line is ignored by bash | |
3 | # This block is ignored by rustc | |
4 | set -e | |
5 | echo "[BUILD] y.rs" 1>&2 | |
6 | rustc $0 -o ${0/.rs/.bin} -g | |
7 | exec ${0/.rs/.bin} $@ | |
8 | */ | |
9 | ||
10 | //! The build system for cg_clif | |
11 | //! | |
12 | //! # Manual compilation | |
13 | //! | |
14 | //! If your system doesn't support shell scripts you can manually compile and run this file using | |
15 | //! for example: | |
16 | //! | |
17 | //! ```shell | |
18 | //! $ rustc y.rs -o build/y.bin | |
19 | //! $ build/y.bin | |
20 | //! ``` | |
21 | //! | |
22 | //! # Naming | |
23 | //! | |
24 | //! The name `y.rs` was chosen to not conflict with rustc's `x.py`. | |
25 | ||
26 | use std::env; | |
27 | use std::path::PathBuf; | |
28 | use std::process; | |
29 | ||
30 | #[path = "build_system/build_backend.rs"] | |
31 | mod build_backend; | |
32 | #[path = "build_system/build_sysroot.rs"] | |
33 | mod build_sysroot; | |
34 | #[path = "build_system/config.rs"] | |
35 | mod config; | |
36 | #[path = "build_system/prepare.rs"] | |
37 | mod prepare; | |
38 | #[path = "build_system/rustc_info.rs"] | |
39 | mod rustc_info; | |
40 | #[path = "build_system/utils.rs"] | |
41 | mod utils; | |
42 | ||
43 | fn usage() { | |
44 | eprintln!("Usage:"); | |
45 | eprintln!(" ./y.rs prepare"); | |
46 | eprintln!(" ./y.rs build [--debug] [--sysroot none|clif|llvm] [--target-dir DIR]"); | |
47 | } | |
48 | ||
49 | macro_rules! arg_error { | |
50 | ($($err:tt)*) => {{ | |
51 | eprintln!($($err)*); | |
52 | usage(); | |
53 | std::process::exit(1); | |
54 | }}; | |
55 | } | |
56 | ||
57 | enum Command { | |
58 | Build, | |
59 | } | |
60 | ||
61 | #[derive(Copy, Clone)] | |
62 | enum SysrootKind { | |
63 | None, | |
64 | Clif, | |
65 | Llvm, | |
66 | } | |
67 | ||
68 | fn main() { | |
69 | env::set_var("CG_CLIF_DISPLAY_CG_TIME", "1"); | |
70 | env::set_var("CG_CLIF_DISABLE_INCR_CACHE", "1"); | |
71 | // The target dir is expected in the default location. Guard against the user changing it. | |
72 | env::set_var("CARGO_TARGET_DIR", "target"); | |
73 | ||
74 | let mut args = env::args().skip(1); | |
75 | let command = match args.next().as_deref() { | |
76 | Some("prepare") => { | |
77 | if args.next().is_some() { | |
78 | arg_error!("./x.rs prepare doesn't expect arguments"); | |
79 | } | |
80 | prepare::prepare(); | |
81 | process::exit(0); | |
82 | } | |
83 | Some("build") => Command::Build, | |
84 | Some(flag) if flag.starts_with('-') => arg_error!("Expected command found flag {}", flag), | |
85 | Some(command) => arg_error!("Unknown command {}", command), | |
86 | None => { | |
87 | usage(); | |
88 | process::exit(0); | |
89 | } | |
90 | }; | |
91 | ||
92 | let mut target_dir = PathBuf::from("build"); | |
93 | let mut channel = "release"; | |
94 | let mut sysroot_kind = SysrootKind::Clif; | |
95 | while let Some(arg) = args.next().as_deref() { | |
96 | match arg { | |
97 | "--target-dir" => { | |
98 | target_dir = PathBuf::from(args.next().unwrap_or_else(|| { | |
99 | arg_error!("--target-dir requires argument"); | |
100 | })) | |
101 | } | |
102 | "--debug" => channel = "debug", | |
103 | "--sysroot" => { | |
104 | sysroot_kind = match args.next().as_deref() { | |
105 | Some("none") => SysrootKind::None, | |
106 | Some("clif") => SysrootKind::Clif, | |
107 | Some("llvm") => SysrootKind::Llvm, | |
108 | Some(arg) => arg_error!("Unknown sysroot kind {}", arg), | |
109 | None => arg_error!("--sysroot requires argument"), | |
110 | } | |
111 | } | |
112 | flag if flag.starts_with("-") => arg_error!("Unknown flag {}", flag), | |
113 | arg => arg_error!("Unexpected argument {}", arg), | |
114 | } | |
115 | } | |
116 | ||
117 | let host_triple = if let Ok(host_triple) = std::env::var("HOST_TRIPLE") { | |
118 | host_triple | |
119 | } else if let Some(host_triple) = crate::config::get_value("host") { | |
120 | host_triple | |
121 | } else { | |
122 | rustc_info::get_host_triple() | |
123 | }; | |
124 | let target_triple = if let Ok(target_triple) = std::env::var("TARGET_TRIPLE") { | |
125 | if target_triple != "" { | |
126 | target_triple | |
127 | } else { | |
128 | host_triple.clone() // Empty target triple can happen on GHA | |
129 | } | |
130 | } else if let Some(target_triple) = crate::config::get_value("target") { | |
131 | target_triple | |
132 | } else { | |
133 | host_triple.clone() | |
134 | }; | |
135 | ||
136 | if target_triple.ends_with("-msvc") { | |
137 | eprintln!("The MSVC toolchain is not yet supported by rustc_codegen_cranelift."); | |
138 | eprintln!("Switch to the MinGW toolchain for Windows support."); | |
139 | eprintln!("Hint: You can use `rustup set default-host x86_64-pc-windows-gnu` to"); | |
140 | eprintln!("set the global default target to MinGW"); | |
141 | process::exit(1); | |
142 | } | |
143 | ||
144 | let cg_clif_build_dir = build_backend::build_backend(channel, &host_triple); | |
145 | build_sysroot::build_sysroot( | |
146 | channel, | |
147 | sysroot_kind, | |
148 | &target_dir, | |
149 | cg_clif_build_dir, | |
150 | &host_triple, | |
151 | &target_triple, | |
152 | ); | |
153 | } |