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7529 lines (6982 loc) · 342 KB
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const builtin = @import("builtin");
const native_os = builtin.os.tag;
const std = @import("std");
const Io = std.Io;
const assert = std.debug.assert;
const fs = std.fs;
const mem = std.mem;
const process = std.process;
const Allocator = mem.Allocator;
const Ast = std.zig.Ast;
const Color = std.zig.Color;
const warn = std.log.warn;
const ThreadPool = std.Thread.Pool;
const cleanExit = std.process.cleanExit;
const Cache = std.Build.Cache;
const Path = std.Build.Cache.Path;
const Directory = std.Build.Cache.Directory;
const EnvVar = std.zig.EnvVar;
const LibCInstallation = std.zig.LibCInstallation;
const AstGen = std.zig.AstGen;
const ZonGen = std.zig.ZonGen;
const Server = std.zig.Server;
const tracy = @import("tracy.zig");
const Compilation = @import("Compilation.zig");
const link = @import("link.zig");
const Package = @import("Package.zig");
const build_options = @import("build_options");
const introspect = @import("introspect.zig");
const wasi_libc = @import("libs/wasi_libc.zig");
const target_util = @import("target.zig");
const crash_report = @import("crash_report.zig");
const Zcu = @import("Zcu.zig");
const mingw = @import("libs/mingw.zig");
const dev = @import("dev.zig");
test {
_ = Package;
_ = @import("codegen.zig");
}
const thread_stack_size = 60 << 20;
pub const std_options: std.Options = .{
.wasiCwd = wasi_cwd,
.logFn = log,
.log_level = switch (builtin.mode) {
.Debug => .debug,
.ReleaseSafe, .ReleaseFast => .info,
.ReleaseSmall => .err,
},
};
pub const panic = crash_report.panic;
pub const debug = crash_report.debug;
var wasi_preopens: fs.wasi.Preopens = undefined;
pub fn wasi_cwd() std.os.wasi.fd_t {
// Expect the first preopen to be current working directory.
const cwd_fd: std.posix.fd_t = 3;
assert(mem.eql(u8, wasi_preopens.names[cwd_fd], "."));
return cwd_fd;
}
const fatal = std.process.fatal;
/// This can be global since stdin is a singleton.
var stdin_buffer: [4096]u8 align(std.heap.page_size_min) = undefined;
/// This can be global since stdout is a singleton.
var stdout_buffer: [4096]u8 align(std.heap.page_size_min) = undefined;
/// Shaming all the locations that inappropriately use an O(N) search algorithm.
/// Please delete this and fix the compilation errors!
pub const @"bad O(N)" = void;
const normal_usage =
\\Usage: zig [command] [options]
\\
\\Commands:
\\
\\ build Build project from build.zig
\\ fetch Copy a package into global cache and print its hash
\\ init Initialize a Zig package in the current directory
\\
\\ build-exe Create executable from source or object files
\\ build-lib Create library from source or object files
\\ build-obj Create object from source or object files
\\ test Perform unit testing
\\ test-obj Create object for unit testing
\\ run Create executable and run immediately
\\
\\ ast-check Look for simple compile errors in any set of files
\\ fmt Reformat Zig source into canonical form
\\ reduce Minimize a bug report
\\ translate-c Convert C code to Zig code
\\
\\ ar Use Zig as a drop-in archiver
\\ cc Use Zig as a drop-in C compiler
\\ c++ Use Zig as a drop-in C++ compiler
\\ dlltool Use Zig as a drop-in dlltool.exe
\\ lib Use Zig as a drop-in lib.exe
\\ ranlib Use Zig as a drop-in ranlib
\\ objcopy Use Zig as a drop-in objcopy
\\ rc Use Zig as a drop-in rc.exe
\\
\\ env Print lib path, std path, cache directory, and version
\\ help Print this help and exit
\\ std View standard library documentation in a browser
\\ libc Display native libc paths file or validate one
\\ targets List available compilation targets
\\ version Print version number and exit
\\ zen Print Zen of Zig and exit
\\
\\General Options:
\\
\\ -h, --help Print command-specific usage
\\
;
const debug_usage = normal_usage ++
\\
\\Debug Commands:
\\
\\ changelist Compute mappings from old ZIR to new ZIR
\\ dump-zir Dump a file containing cached ZIR
\\ detect-cpu Compare Zig's CPU feature detection vs LLVM
\\ llvm-ints Dump a list of LLVMABIAlignmentOfType for all integers
\\
;
const usage = if (build_options.enable_debug_extensions) debug_usage else normal_usage;
var log_scopes: std.ArrayList([]const u8) = .empty;
pub fn log(
comptime level: std.log.Level,
comptime scope: @EnumLiteral(),
comptime format: []const u8,
args: anytype,
) void {
// Hide debug messages unless:
// * logging enabled with `-Dlog`.
// * the --debug-log arg for the scope has been provided
if (@intFromEnum(level) > @intFromEnum(std.options.log_level) or
@intFromEnum(level) > @intFromEnum(std.log.Level.info))
{
if (!build_options.enable_logging) return;
const scope_name = @tagName(scope);
for (log_scopes.items) |log_scope| {
if (mem.eql(u8, log_scope, scope_name))
break;
} else return;
}
// Otherwise, use the default implementation.
std.log.defaultLog(level, scope, format, args);
}
var debug_allocator: std.heap.DebugAllocator(.{
.stack_trace_frames = build_options.mem_leak_frames,
}) = .init;
pub fn main() anyerror!void {
const gpa, const is_debug = gpa: {
if (build_options.debug_gpa) break :gpa .{ debug_allocator.allocator(), true };
if (native_os == .wasi) break :gpa .{ std.heap.wasm_allocator, false };
if (builtin.link_libc) {
// We would prefer to use raw libc allocator here, but cannot use
// it if it won't support the alignment we need.
if (@alignOf(std.c.max_align_t) < @max(@alignOf(i128), std.atomic.cache_line)) {
break :gpa .{ std.heap.c_allocator, false };
}
break :gpa .{ std.heap.raw_c_allocator, false };
}
break :gpa switch (builtin.mode) {
.Debug, .ReleaseSafe => .{ debug_allocator.allocator(), true },
.ReleaseFast, .ReleaseSmall => .{ std.heap.smp_allocator, false },
};
};
defer if (is_debug) {
_ = debug_allocator.deinit();
};
var arena_instance = std.heap.ArenaAllocator.init(gpa);
defer arena_instance.deinit();
const arena = arena_instance.allocator();
const args = try process.argsAlloc(arena);
if (args.len > 0) crash_report.zig_argv0 = args[0];
if (tracy.enable_allocation) {
var gpa_tracy = tracy.tracyAllocator(gpa);
return mainArgs(gpa_tracy.allocator(), arena, args);
}
if (native_os == .wasi) {
wasi_preopens = try fs.wasi.preopensAlloc(arena);
}
return mainArgs(gpa, arena, args);
}
fn mainArgs(gpa: Allocator, arena: Allocator, args: []const []const u8) !void {
const tr = tracy.trace(@src());
defer tr.end();
if (args.len <= 1) {
std.log.info("{s}", .{usage});
fatal("expected command argument", .{});
}
if (process.can_execv and std.posix.getenvZ("ZIG_IS_DETECTING_LIBC_PATHS") != null) {
dev.check(.cc_command);
// In this case we have accidentally invoked ourselves as "the system C compiler"
// to figure out where libc is installed. This is essentially infinite recursion
// via child process execution due to the CC environment variable pointing to Zig.
// Here we ignore the CC environment variable and exec `cc` as a child process.
// However it's possible Zig is installed as *that* C compiler as well, which is
// why we have this additional environment variable here to check.
var env_map = try process.getEnvMap(arena);
const inf_loop_env_key = "ZIG_IS_TRYING_TO_NOT_CALL_ITSELF";
if (env_map.get(inf_loop_env_key) != null) {
fatal("The compilation links against libc, but Zig is unable to provide a libc " ++
"for this operating system, and no --libc " ++
"parameter was provided, so Zig attempted to invoke the system C compiler " ++
"in order to determine where libc is installed. However the system C " ++
"compiler is `zig cc`, so no libc installation was found.", .{});
}
try env_map.put(inf_loop_env_key, "1");
// Some programs such as CMake will strip the `cc` and subsequent args from the
// CC environment variable. We detect and support this scenario here because of
// the ZIG_IS_DETECTING_LIBC_PATHS environment variable.
if (mem.eql(u8, args[1], "cc")) {
return process.execve(arena, args[1..], &env_map);
} else {
const modified_args = try arena.dupe([]const u8, args);
modified_args[0] = "cc";
return process.execve(arena, modified_args, &env_map);
}
}
var threaded: Io.Threaded = .init(gpa);
defer threaded.deinit();
const io = threaded.io();
const cmd = args[1];
const cmd_args = args[2..];
if (mem.eql(u8, cmd, "build-exe")) {
dev.check(.build_exe_command);
return buildOutputType(gpa, arena, io, args, .{ .build = .Exe });
} else if (mem.eql(u8, cmd, "build-lib")) {
dev.check(.build_lib_command);
return buildOutputType(gpa, arena, io, args, .{ .build = .Lib });
} else if (mem.eql(u8, cmd, "build-obj")) {
dev.check(.build_obj_command);
return buildOutputType(gpa, arena, io, args, .{ .build = .Obj });
} else if (mem.eql(u8, cmd, "test")) {
dev.check(.test_command);
return buildOutputType(gpa, arena, io, args, .zig_test);
} else if (mem.eql(u8, cmd, "test-obj")) {
dev.check(.test_command);
return buildOutputType(gpa, arena, io, args, .zig_test_obj);
} else if (mem.eql(u8, cmd, "run")) {
dev.check(.run_command);
return buildOutputType(gpa, arena, io, args, .run);
} else if (mem.eql(u8, cmd, "dlltool") or
mem.eql(u8, cmd, "ranlib") or
mem.eql(u8, cmd, "lib") or
mem.eql(u8, cmd, "ar"))
{
dev.check(.ar_command);
return process.exit(try llvmArMain(arena, args));
} else if (mem.eql(u8, cmd, "build")) {
dev.check(.build_command);
return cmdBuild(gpa, arena, io, cmd_args);
} else if (mem.eql(u8, cmd, "clang") or
mem.eql(u8, cmd, "-cc1") or mem.eql(u8, cmd, "-cc1as"))
{
dev.check(.clang_command);
return process.exit(try clangMain(arena, args));
} else if (mem.eql(u8, cmd, "ld.lld") or
mem.eql(u8, cmd, "lld-link") or
mem.eql(u8, cmd, "wasm-ld"))
{
dev.check(.lld_linker);
return process.exit(try lldMain(arena, args, true));
} else if (mem.eql(u8, cmd, "cc")) {
dev.check(.cc_command);
return buildOutputType(gpa, arena, io, args, .cc);
} else if (mem.eql(u8, cmd, "c++")) {
dev.check(.cc_command);
return buildOutputType(gpa, arena, io, args, .cpp);
} else if (mem.eql(u8, cmd, "translate-c")) {
dev.check(.translate_c_command);
return buildOutputType(gpa, arena, io, args, .translate_c);
} else if (mem.eql(u8, cmd, "rc")) {
const use_server = cmd_args.len > 0 and std.mem.eql(u8, cmd_args[0], "--zig-integration");
return jitCmd(gpa, arena, io, cmd_args, .{
.cmd_name = "resinator",
.root_src_path = "resinator/main.zig",
.depend_on_aro = true,
.prepend_zig_lib_dir_path = true,
.server = use_server,
});
} else if (mem.eql(u8, cmd, "fmt")) {
dev.check(.fmt_command);
return @import("fmt.zig").run(gpa, arena, io, cmd_args);
} else if (mem.eql(u8, cmd, "objcopy")) {
return jitCmd(gpa, arena, io, cmd_args, .{
.cmd_name = "objcopy",
.root_src_path = "objcopy.zig",
});
} else if (mem.eql(u8, cmd, "fetch")) {
return cmdFetch(gpa, arena, io, cmd_args);
} else if (mem.eql(u8, cmd, "libc")) {
return jitCmd(gpa, arena, io, cmd_args, .{
.cmd_name = "libc",
.root_src_path = "libc.zig",
.prepend_zig_lib_dir_path = true,
});
} else if (mem.eql(u8, cmd, "std")) {
return jitCmd(gpa, arena, io, cmd_args, .{
.cmd_name = "std",
.root_src_path = "std-docs.zig",
.prepend_zig_lib_dir_path = true,
.prepend_zig_exe_path = true,
.prepend_global_cache_path = true,
});
} else if (mem.eql(u8, cmd, "init")) {
return cmdInit(gpa, arena, cmd_args);
} else if (mem.eql(u8, cmd, "targets")) {
dev.check(.targets_command);
const host = std.zig.resolveTargetQueryOrFatal(io, .{});
var stdout_writer = fs.File.stdout().writer(&stdout_buffer);
try @import("print_targets.zig").cmdTargets(arena, cmd_args, &stdout_writer.interface, &host);
return stdout_writer.interface.flush();
} else if (mem.eql(u8, cmd, "version")) {
dev.check(.version_command);
try fs.File.stdout().writeAll(build_options.version ++ "\n");
return;
} else if (mem.eql(u8, cmd, "env")) {
dev.check(.env_command);
const host = std.zig.resolveTargetQueryOrFatal(io, .{});
var stdout_writer = fs.File.stdout().writer(&stdout_buffer);
try @import("print_env.zig").cmdEnv(
arena,
&stdout_writer.interface,
args,
if (native_os == .wasi) wasi_preopens,
&host,
);
return stdout_writer.interface.flush();
} else if (mem.eql(u8, cmd, "reduce")) {
return jitCmd(gpa, arena, io, cmd_args, .{
.cmd_name = "reduce",
.root_src_path = "reduce.zig",
});
} else if (mem.eql(u8, cmd, "zen")) {
dev.check(.zen_command);
return fs.File.stdout().writeAll(info_zen);
} else if (mem.eql(u8, cmd, "help") or mem.eql(u8, cmd, "-h") or mem.eql(u8, cmd, "--help")) {
dev.check(.help_command);
return fs.File.stdout().writeAll(usage);
} else if (mem.eql(u8, cmd, "ast-check")) {
return cmdAstCheck(arena, io, cmd_args);
} else if (mem.eql(u8, cmd, "detect-cpu")) {
return cmdDetectCpu(io, cmd_args);
} else if (build_options.enable_debug_extensions and mem.eql(u8, cmd, "changelist")) {
return cmdChangelist(arena, io, cmd_args);
} else if (build_options.enable_debug_extensions and mem.eql(u8, cmd, "dump-zir")) {
return cmdDumpZir(arena, io, cmd_args);
} else if (build_options.enable_debug_extensions and mem.eql(u8, cmd, "llvm-ints")) {
return cmdDumpLlvmInts(gpa, arena, cmd_args);
} else {
std.log.info("{s}", .{usage});
fatal("unknown command: {s}", .{args[1]});
}
}
const usage_build_generic =
\\Usage: zig build-exe [options] [files]
\\ zig build-lib [options] [files]
\\ zig build-obj [options] [files]
\\ zig test [options] [files]
\\ zig run [options] [files] [-- [args]]
\\ zig translate-c [options] [file]
\\
\\Supported file types:
\\ .zig Zig source code
\\ .o ELF object file
\\ .o Mach-O (macOS) object file
\\ .o WebAssembly object file
\\ .obj COFF (Windows) object file
\\ .lib COFF (Windows) static library
\\ .a ELF static library
\\ .a Mach-O (macOS) static library
\\ .a WebAssembly static library
\\ .so ELF shared object (dynamic link)
\\ .dll Windows Dynamic Link Library
\\ .dylib Mach-O (macOS) dynamic library
\\ .tbd (macOS) text-based dylib definition
\\ .s Target-specific assembly source code
\\ .S Assembly with C preprocessor (requires LLVM extensions)
\\ .c C source code (requires LLVM extensions)
\\ .cxx .cc .C .cpp .c++ C++ source code (requires LLVM extensions)
\\ .m Objective-C source code (requires LLVM extensions)
\\ .mm Objective-C++ source code (requires LLVM extensions)
\\ .bc LLVM IR Module (requires LLVM extensions)
\\
\\General Options:
\\ -h, --help Print this help and exit
\\ --color [auto|off|on] Enable or disable colored error messages
\\ -j<N> Limit concurrent jobs (default is to use all CPU cores)
\\ -fincremental Enable incremental compilation
\\ -fno-incremental Disable incremental compilation
\\ -femit-bin[=path] (default) Output machine code
\\ -fno-emit-bin Do not output machine code
\\ -femit-asm[=path] Output .s (assembly code)
\\ -fno-emit-asm (default) Do not output .s (assembly code)
\\ -femit-llvm-ir[=path] Produce a .ll file with optimized LLVM IR (requires LLVM extensions)
\\ -fno-emit-llvm-ir (default) Do not produce a .ll file with optimized LLVM IR
\\ -femit-llvm-bc[=path] Produce an optimized LLVM module as a .bc file (requires LLVM extensions)
\\ -fno-emit-llvm-bc (default) Do not produce an optimized LLVM module as a .bc file
\\ -femit-h[=path] Generate a C header file (.h)
\\ -fno-emit-h (default) Do not generate a C header file (.h)
\\ -femit-docs[=path] Create a docs/ dir with html documentation
\\ -fno-emit-docs (default) Do not produce docs/ dir with html documentation
\\ -femit-implib[=path] (default) Produce an import .lib when building a Windows DLL
\\ -fno-emit-implib Do not produce an import .lib when building a Windows DLL
\\ --show-builtin Output the source of @import("builtin") then exit
\\ --cache-dir [path] Override the local cache directory
\\ --global-cache-dir [path] Override the global cache directory
\\ --zig-lib-dir [path] Override path to Zig installation lib directory
\\
\\Global Compile Options:
\\ --name [name] Compilation unit name (not a file path)
\\ --libc [file] Provide a file which specifies libc paths
\\ -x language Treat subsequent input files as having type <language>
\\ --dep [[import=]name] Add an entry to the next module's import table
\\ -M[name][=src] Create a module based on the current per-module settings.
\\ The first module is the main module.
\\ "std" can be configured by omitting src
\\ After a -M argument, per-module settings are reset.
\\ --error-limit [num] Set the maximum amount of distinct error values
\\ -fllvm Force using LLVM as the codegen backend
\\ -fno-llvm Prevent using LLVM as the codegen backend
\\ -flibllvm Force using the LLVM API in the codegen backend
\\ -fno-libllvm Prevent using the LLVM API in the codegen backend
\\ -fclang Force using Clang as the C/C++ compilation backend
\\ -fno-clang Prevent using Clang as the C/C++ compilation backend
\\ -fPIE Force-enable Position Independent Executable
\\ -fno-PIE Force-disable Position Independent Executable
\\ -flto Force-enable Link Time Optimization (requires LLVM extensions)
\\ -fno-lto Force-disable Link Time Optimization
\\ -fdll-export-fns Mark exported functions as DLL exports (Windows)
\\ -fno-dll-export-fns Force-disable marking exported functions as DLL exports
\\ -freference-trace[=num] Show num lines of reference trace per compile error
\\ -fno-reference-trace Disable reference trace
\\ -ffunction-sections Places each function in a separate section
\\ -fno-function-sections All functions go into same section
\\ -fdata-sections Places each data in a separate section
\\ -fno-data-sections All data go into same section
\\ -fformatted-panics Enable formatted safety panics
\\ -fno-formatted-panics Disable formatted safety panics
\\ -fstructured-cfg (SPIR-V) force SPIR-V kernels to use structured control flow
\\ -fno-structured-cfg (SPIR-V) force SPIR-V kernels to not use structured control flow
\\ -mexec-model=[value] (WASI) Execution model
\\ -municode (Windows) Use wmain/wWinMain as entry point
\\ --time-report Send timing diagnostics to '--listen' clients
\\
\\Per-Module Compile Options:
\\ -target [name] <arch><sub>-<os>-<abi> see the targets command
\\ -O [mode] Choose what to optimize for
\\ Debug (default) Optimizations off, safety on
\\ ReleaseFast Optimize for performance, safety off
\\ ReleaseSafe Optimize for performance, safety on
\\ ReleaseSmall Optimize for small binary, safety off
\\ -ofmt=[fmt] Override target object format
\\ elf Executable and Linking Format
\\ c C source code
\\ wasm WebAssembly
\\ coff Common Object File Format (Windows)
\\ macho macOS relocatables
\\ spirv Standard, Portable Intermediate Representation V (SPIR-V)
\\ plan9 Plan 9 from Bell Labs object format
\\ hex (planned feature) Intel IHEX
\\ raw (planned feature) Dump machine code directly
\\ -mcpu [cpu] Specify target CPU and feature set
\\ -mcmodel=[model] Limit range of code and data virtual addresses
\\ default
\\ extreme
\\ kernel
\\ large
\\ medany
\\ medium
\\ medlow
\\ medmid
\\ normal
\\ small
\\ tiny
\\ -mred-zone Force-enable the "red-zone"
\\ -mno-red-zone Force-disable the "red-zone"
\\ -fomit-frame-pointer Omit the stack frame pointer
\\ -fno-omit-frame-pointer Store the stack frame pointer
\\ -fPIC Force-enable Position Independent Code
\\ -fno-PIC Force-disable Position Independent Code
\\ -fstack-check Enable stack probing in unsafe builds
\\ -fno-stack-check Disable stack probing in safe builds
\\ -fstack-protector Enable stack protection in unsafe builds
\\ -fno-stack-protector Disable stack protection in safe builds
\\ -fvalgrind Include valgrind client requests in release builds
\\ -fno-valgrind Omit valgrind client requests in debug builds
\\ -fsanitize-c[=mode] Enable C undefined behavior detection in unsafe builds
\\ trap Insert trap instructions on undefined behavior
\\ full (Default) Insert runtime calls on undefined behavior
\\ -fno-sanitize-c Disable C undefined behavior detection in safe builds
\\ -fsanitize-thread Enable Thread Sanitizer
\\ -fno-sanitize-thread Disable Thread Sanitizer
\\ -ffuzz Enable fuzz testing instrumentation
\\ -fno-fuzz Disable fuzz testing instrumentation
\\ -fbuiltin Enable implicit builtin knowledge of functions
\\ -fno-builtin Disable implicit builtin knowledge of functions
\\ -funwind-tables Always produce unwind table entries for all functions
\\ -fasync-unwind-tables Always produce asynchronous unwind table entries for all functions
\\ -fno-unwind-tables Never produce unwind table entries
\\ -ferror-tracing Enable error tracing in release builds
\\ -fno-error-tracing Disable error tracing in debug builds
\\ -fsingle-threaded Code assumes there is only one thread
\\ -fno-single-threaded Code may not assume there is only one thread
\\ -fstrip Omit debug symbols
\\ -fno-strip Keep debug symbols
\\ -idirafter [dir] Add directory to AFTER include search path
\\ -isystem [dir] Add directory to SYSTEM include search path
\\ -I[dir] Add directory to include search path
\\ --embed-dir=[dir] Add directory to embed search path
\\ -D[macro]=[value] Define C [macro] to [value] (1 if [value] omitted)
\\ -cflags [flags] -- Set extra flags for the next positional C source files
\\ -rcflags [flags] -- Set extra flags for the next positional .rc source files
\\ -rcincludes=[type] Set the type of includes to use when compiling .rc source files
\\ any (default) Use msvc if available, fall back to gnu
\\ msvc Use msvc include paths (must be present on the system)
\\ gnu Use mingw include paths (distributed with Zig)
\\ none Do not use any autodetected include paths
\\
\\Global Link Options:
\\ -T[script], --script [script] Use a custom linker script
\\ --version-script [path] Provide a version .map file
\\ --undefined-version Allow version scripts to refer to undefined symbols
\\ --no-undefined-version (default) Disallow version scripts from referring to undefined symbols
\\ --enable-new-dtags Use the new behavior for dynamic tags (RUNPATH)
\\ --disable-new-dtags Use the old behavior for dynamic tags (RPATH)
\\ --dynamic-linker [path] Set the dynamic interpreter path (usually ld.so)
\\ --no-dynamic-linker Do not set any dynamic interpreter path
\\ --sysroot [path] Set the system root directory (usually /)
\\ --version [ver] Dynamic library semver
\\ -fentry Enable entry point with default symbol name
\\ -fentry=[name] Override the entry point symbol name
\\ -fno-entry Do not output any entry point
\\ --force_undefined [name] Specify the symbol must be defined for the link to succeed
\\ -fsoname[=name] Override the default SONAME value
\\ -fno-soname Disable emitting a SONAME
\\ -flld Force using LLD as the linker
\\ -fno-lld Prevent using LLD as the linker
\\ -fcompiler-rt Always include compiler-rt symbols in output
\\ -fno-compiler-rt Prevent including compiler-rt symbols in output
\\ -fubsan-rt Always include ubsan-rt symbols in the output
\\ -fno-ubsan-rt Prevent including ubsan-rt symbols in the output
\\ -rdynamic Add all symbols to the dynamic symbol table
\\ -feach-lib-rpath Ensure adding rpath for each used dynamic library
\\ -fno-each-lib-rpath Prevent adding rpath for each used dynamic library
\\ -fallow-shlib-undefined Allows undefined symbols in shared libraries
\\ -fno-allow-shlib-undefined Disallows undefined symbols in shared libraries
\\ -fallow-so-scripts Allows .so files to be GNU ld scripts
\\ -fno-allow-so-scripts (default) .so files must be ELF files
\\ --build-id[=style] At a minor link-time expense, embeds a build ID in binaries
\\ fast 8-byte non-cryptographic hash (COFF, ELF, WASM)
\\ sha1, tree 20-byte cryptographic hash (ELF, WASM)
\\ md5 16-byte cryptographic hash (ELF)
\\ uuid 16-byte random UUID (ELF, WASM)
\\ 0x[hexstring] Constant ID, maximum 32 bytes (ELF, WASM)
\\ none (default) No build ID
\\ --eh-frame-hdr Enable C++ exception handling by passing --eh-frame-hdr to linker
\\ --no-eh-frame-hdr Disable C++ exception handling by passing --no-eh-frame-hdr to linker
\\ --emit-relocs Enable output of relocation sections for post build tools
\\ -z [arg] Set linker extension flags
\\ nodelete Indicate that the object cannot be deleted from a process
\\ notext Permit read-only relocations in read-only segments
\\ defs Force a fatal error if any undefined symbols remain
\\ undefs Reverse of -z defs
\\ origin Indicate that the object must have its origin processed
\\ nocopyreloc Disable the creation of copy relocations
\\ now (default) Force all relocations to be processed on load
\\ lazy Don't force all relocations to be processed on load
\\ relro (default) Force all relocations to be read-only after processing
\\ norelro Don't force all relocations to be read-only after processing
\\ common-page-size=[bytes] Set the common page size for ELF binaries
\\ max-page-size=[bytes] Set the max page size for ELF binaries
\\ -dynamic Force output to be dynamically linked
\\ -static Force output to be statically linked
\\ -Bsymbolic Bind global references locally
\\ --compress-debug-sections=[e] Debug section compression settings
\\ none No compression
\\ zlib Compression with deflate/inflate
\\ zstd Compression with zstandard
\\ --gc-sections Force removal of functions and data that are unreachable by the entry point or exported symbols
\\ --no-gc-sections Don't force removal of unreachable functions and data
\\ --sort-section=[value] Sort wildcard section patterns by 'name' or 'alignment'
\\ --subsystem [subsystem] (Windows) /SUBSYSTEM:<subsystem> to the linker
\\ --stack [size] Override default stack size
\\ --image-base [addr] Set base address for executable image
\\ -install_name=[value] (Darwin) add dylib's install name
\\ --entitlements [path] (Darwin) add path to entitlements file for embedding in code signature
\\ -pagezero_size [value] (Darwin) size of the __PAGEZERO segment in hexadecimal notation
\\ -headerpad [value] (Darwin) set minimum space for future expansion of the load commands in hexadecimal notation
\\ -headerpad_max_install_names (Darwin) set enough space as if all paths were MAXPATHLEN
\\ -dead_strip (Darwin) remove functions and data that are unreachable by the entry point or exported symbols
\\ -dead_strip_dylibs (Darwin) remove dylibs that are unreachable by the entry point or exported symbols
\\ -ObjC (Darwin) force load all members of static archives that implement an Objective-C class or category
\\ --import-memory (WebAssembly) import memory from the environment
\\ --export-memory (WebAssembly) export memory to the host (Default unless --import-memory used)
\\ --import-symbols (WebAssembly) import missing symbols from the host environment
\\ --import-table (WebAssembly) import function table from the host environment
\\ --export-table (WebAssembly) export function table to the host environment
\\ --initial-memory=[bytes] (WebAssembly) initial size of the linear memory
\\ --max-memory=[bytes] (WebAssembly) maximum size of the linear memory
\\ --shared-memory (WebAssembly) use shared linear memory
\\ --global-base=[addr] (WebAssembly) where to start to place global data
\\
\\Per-Module Link Options:
\\ -l[lib], --library [lib] Link against system library (only if actually used)
\\ -needed-l[lib], Link against system library (even if unused)
\\ --needed-library [lib]
\\ -weak-l[lib] link against system library marking it and all
\\ -weak_library [lib] referenced symbols as weak
\\ -L[d], --library-directory [d] Add a directory to the library search path
\\ -search_paths_first For each library search path, check for dynamic
\\ lib then static lib before proceeding to next path.
\\ -search_paths_first_static For each library search path, check for static
\\ lib then dynamic lib before proceeding to next path.
\\ -search_dylibs_first Search for dynamic libs in all library search
\\ paths, then static libs.
\\ -search_static_first Search for static libs in all library search
\\ paths, then dynamic libs.
\\ -search_dylibs_only Only search for dynamic libs.
\\ -search_static_only Only search for static libs.
\\ -rpath [path] Add directory to the runtime library search path
\\ -framework [name] (Darwin) link against framework
\\ -needed_framework [name] (Darwin) link against framework (even if unused)
\\ -needed_library [lib] (Darwin) link against system library (even if unused)
\\ -weak_framework [name] (Darwin) link against framework and mark it and all referenced symbols as weak
\\ -F[dir] (Darwin) add search path for frameworks
\\ --export=[value] (WebAssembly) Force a symbol to be exported
\\
\\Test Options:
\\ --test-filter [text] Skip tests that do not match any filter
\\ --test-cmd [arg] Specify test execution command one arg at a time
\\ --test-cmd-bin Appends test binary path to test cmd args
\\ --test-no-exec Compiles test binary without running it
\\ --test-runner [path] Specify a custom test runner
\\
\\Debug Options (Zig Compiler Development):
\\ -fopt-bisect-limit=[limit] Only run [limit] first LLVM optimization passes
\\ -fstack-report Print stack size diagnostics
\\ --verbose-link Display linker invocations
\\ --verbose-cc Display C compiler invocations
\\ --verbose-air Enable compiler debug output for Zig AIR
\\ --verbose-intern-pool Enable compiler debug output for InternPool
\\ --verbose-generic-instances Enable compiler debug output for generic instance generation
\\ --verbose-llvm-ir[=path] Enable compiler debug output for unoptimized LLVM IR
\\ --verbose-llvm-bc=[path] Enable compiler debug output for unoptimized LLVM BC
\\ --verbose-cimport Enable compiler debug output for C imports
\\ --verbose-llvm-cpu-features Enable compiler debug output for LLVM CPU features
\\ --debug-log [scope] Enable printing debug/info log messages for scope
\\ --debug-compile-errors Crash with helpful diagnostics at the first compile error
\\ --debug-link-snapshot Enable dumping of the linker's state in JSON format
\\ --debug-rt Debug compiler runtime libraries
\\ --debug-incremental Enable incremental compilation debug features
\\
;
const SOName = union(enum) {
no,
yes_default_value,
yes: []const u8,
};
const EmitBin = union(enum) {
no,
yes_default_path,
yes: []const u8,
yes_a_out,
};
const Emit = union(enum) {
no,
yes_default_path,
yes: []const u8,
const OutputToCacheReason = enum { listen, @"zig run", @"zig test" };
fn resolve(emit: Emit, default_basename: []const u8, output_to_cache: ?OutputToCacheReason) Compilation.CreateOptions.Emit {
return switch (emit) {
.no => .no,
.yes_default_path => if (output_to_cache != null) .yes_cache else .{ .yes_path = default_basename },
.yes => |path| if (output_to_cache) |reason| {
switch (reason) {
.listen => fatal("--listen incompatible with explicit output path '{s}'", .{path}),
.@"zig run", .@"zig test" => fatal(
"'{s}' with explicit output path '{s}' requires explicit '-femit-bin=path' or '-fno-emit-bin'",
.{ @tagName(reason), path },
),
}
} else e: {
// If there's a dirname, check that dir exists. This will give a more descriptive error than `Compilation` otherwise would.
if (fs.path.dirname(path)) |dir_path| {
var dir = fs.cwd().openDir(dir_path, .{}) catch |err| {
fatal("unable to open output directory '{s}': {s}", .{ dir_path, @errorName(err) });
};
dir.close();
}
break :e .{ .yes_path = path };
},
};
}
};
const ArgMode = union(enum) {
build: std.builtin.OutputMode,
cc,
cpp,
translate_c,
zig_test,
zig_test_obj,
run,
};
const Listen = union(enum) {
none,
stdio: if (dev.env.supports(.stdio_listen)) void else noreturn,
ip4: if (dev.env.supports(.network_listen)) Io.net.Ip4Address else noreturn,
};
const ArgsIterator = struct {
resp_file: ?ArgIteratorResponseFile = null,
args: []const []const u8,
i: usize = 0,
fn next(it: *@This()) ?[]const u8 {
if (it.i >= it.args.len) {
if (it.resp_file) |*resp| return resp.next();
return null;
}
defer it.i += 1;
return it.args[it.i];
}
fn nextOrFatal(it: *@This()) []const u8 {
if (it.i >= it.args.len) {
if (it.resp_file) |*resp| if (resp.next()) |ret| return ret;
fatal("expected parameter after {s}", .{it.args[it.i - 1]});
}
defer it.i += 1;
return it.args[it.i];
}
};
/// Similar to `link.Framework` except it doesn't store yet unresolved
/// path to the framework.
const Framework = struct {
needed: bool = false,
weak: bool = false,
};
const CliModule = struct {
root_path: []const u8,
root_src_path: []const u8,
cc_argv: []const []const u8,
inherited: Package.Module.CreateOptions.Inherited,
target_arch_os_abi: ?[]const u8,
target_mcpu: ?[]const u8,
deps: []const Dep,
resolved: ?*Package.Module,
c_source_files_start: usize,
c_source_files_end: usize,
rc_source_files_start: usize,
rc_source_files_end: usize,
const Dep = struct {
key: []const u8,
value: []const u8,
};
};
fn buildOutputType(
gpa: Allocator,
arena: Allocator,
io: Io,
all_args: []const []const u8,
arg_mode: ArgMode,
) !void {
var provided_name: ?[]const u8 = null;
var root_src_file: ?[]const u8 = null;
var version: std.SemanticVersion = .{ .major = 0, .minor = 0, .patch = 0 };
var have_version = false;
var compatibility_version: ?std.SemanticVersion = null;
var function_sections = false;
var data_sections = false;
var listen: Listen = .none;
var debug_compile_errors = false;
var debug_incremental = false;
var verbose_link = (native_os != .wasi or builtin.link_libc) and
EnvVar.ZIG_VERBOSE_LINK.isSet();
var verbose_cc = (native_os != .wasi or builtin.link_libc) and
EnvVar.ZIG_VERBOSE_CC.isSet();
var verbose_air = false;
var verbose_intern_pool = false;
var verbose_generic_instances = false;
var verbose_llvm_ir: ?[]const u8 = null;
var verbose_llvm_bc: ?[]const u8 = null;
var verbose_cimport = false;
var verbose_llvm_cpu_features = false;
var time_report = false;
var stack_report = false;
var show_builtin = false;
var emit_bin: EmitBin = .yes_default_path;
var emit_asm: Emit = .no;
var emit_llvm_ir: Emit = .no;
var emit_llvm_bc: Emit = .no;
var emit_docs: Emit = .no;
var emit_implib: Emit = .yes_default_path;
var emit_implib_arg_provided = false;
var target_arch_os_abi: ?[]const u8 = null;
var target_mcpu: ?[]const u8 = null;
var emit_h: Emit = .no;
var soname: SOName = undefined;
var want_compiler_rt: ?bool = null;
var want_ubsan_rt: ?bool = null;
var linker_script: ?[]const u8 = null;
var version_script: ?[]const u8 = null;
var linker_repro: ?bool = null;
var linker_allow_undefined_version: bool = false;
var linker_enable_new_dtags: ?bool = null;
var disable_c_depfile = false;
var linker_sort_section: ?link.File.Lld.Elf.SortSection = null;
var linker_gc_sections: ?bool = null;
var linker_compress_debug_sections: ?std.zig.CompressDebugSections = null;
var linker_allow_shlib_undefined: ?bool = null;
var allow_so_scripts: bool = false;
var linker_bind_global_refs_locally: ?bool = null;
var linker_import_symbols: bool = false;
var linker_import_table: bool = false;
var linker_export_table: bool = false;
var linker_initial_memory: ?u64 = null;
var linker_max_memory: ?u64 = null;
var linker_global_base: ?u64 = null;
var linker_print_gc_sections: bool = false;
var linker_print_icf_sections: bool = false;
var linker_print_map: bool = false;
var llvm_opt_bisect_limit: c_int = -1;
var linker_z_nocopyreloc = false;
var linker_z_nodelete = false;
var linker_z_notext = false;
var linker_z_defs = false;
var linker_z_origin = false;
var linker_z_now = true;
var linker_z_relro = true;
var linker_z_common_page_size: ?u64 = null;
var linker_z_max_page_size: ?u64 = null;
var linker_tsaware = false;
var linker_nxcompat = false;
var linker_dynamicbase = true;
var linker_optimization: ?[]const u8 = null;
var linker_module_definition_file: ?[]const u8 = null;
var test_no_exec = false;
var entry: Compilation.CreateOptions.Entry = .default;
var force_undefined_symbols: std.StringArrayHashMapUnmanaged(void) = .empty;
var stack_size: ?u64 = null;
var image_base: ?u64 = null;
var link_eh_frame_hdr = false;
var link_emit_relocs = false;
var build_id: ?std.zig.BuildId = null;
var runtime_args_start: ?usize = null;
var test_filters: std.ArrayList([]const u8) = .empty;
var test_runner_path: ?[]const u8 = null;
var override_local_cache_dir: ?[]const u8 = try EnvVar.ZIG_LOCAL_CACHE_DIR.get(arena);
var override_global_cache_dir: ?[]const u8 = try EnvVar.ZIG_GLOBAL_CACHE_DIR.get(arena);
var override_lib_dir: ?[]const u8 = try EnvVar.ZIG_LIB_DIR.get(arena);
var clang_preprocessor_mode: Compilation.ClangPreprocessorMode = .no;
var subsystem: ?std.zig.Subsystem = null;
var major_subsystem_version: ?u16 = null;
var minor_subsystem_version: ?u16 = null;
var mingw_unicode_entry_point: bool = false;
var enable_link_snapshots: bool = false;
var debug_compiler_runtime_libs = false;
var install_name: ?[]const u8 = null;
var hash_style: link.File.Lld.Elf.HashStyle = .both;
var entitlements: ?[]const u8 = null;
var pagezero_size: ?u64 = null;
var lib_search_strategy: link.UnresolvedInput.SearchStrategy = .paths_first;
var lib_preferred_mode: std.builtin.LinkMode = .dynamic;
var headerpad_size: ?u32 = null;
var headerpad_max_install_names: bool = false;
var dead_strip_dylibs: bool = false;
var force_load_objc: bool = false;
var discard_local_symbols: bool = false;
var contains_res_file: bool = false;
var reference_trace: ?u32 = null;
var pdb_out_path: ?[]const u8 = null;
var error_limit: ?Zcu.ErrorInt = null;
// These are before resolving sysroot.
var extra_cflags: std.ArrayList([]const u8) = .empty;
var extra_rcflags: std.ArrayList([]const u8) = .empty;
var symbol_wrap_set: std.StringArrayHashMapUnmanaged(void) = .empty;
var rc_includes: std.zig.RcIncludes = .any;
var manifest_file: ?[]const u8 = null;
var linker_export_symbol_names: std.ArrayList([]const u8) = .empty;
// Tracks the position in c_source_files which have already their owner populated.
var c_source_files_owner_index: usize = 0;
// Tracks the position in rc_source_files which have already their owner populated.
var rc_source_files_owner_index: usize = 0;
// null means replace with the test executable binary
var test_exec_args: std.ArrayList(?[]const u8) = .empty;
// These get set by CLI flags and then snapshotted when a `-M` flag is
// encountered.
var mod_opts: Package.Module.CreateOptions.Inherited = .{};
// These get appended to by CLI flags and then slurped when a `-M` flag
// is encountered.
var cssan: ClangSearchSanitizer = .{};
var cc_argv: std.ArrayList([]const u8) = .empty;
var deps: std.ArrayList(CliModule.Dep) = .empty;
// Contains every module specified via -M. The dependencies are added
// after argument parsing is completed. We use a StringArrayHashMap to make
// error output consistent. "root" is special.
var create_module: CreateModule = .{
// Populated just before the call to `createModule`.
.dirs = undefined,
.object_format = null,
.dynamic_linker = null,
.modules = .{},
.opts = .{
.is_test = switch (arg_mode) {
.zig_test, .zig_test_obj => true,
.build, .cc, .cpp, .translate_c, .run => false,
},
// Populated while parsing CLI args.
.output_mode = undefined,
// Populated in the call to `createModule` for the root module.
.resolved_target = undefined,
.have_zcu = false,
// Populated just before the call to `createModule`.
.emit_llvm_ir = undefined,
// Populated just before the call to `createModule`.
.emit_llvm_bc = undefined,
// Populated just before the call to `createModule`.
.emit_bin = undefined,
// Populated just before the call to `createModule`.
.any_c_source_files = undefined,
},
// Populated in the call to `createModule` for the root module.
.resolved_options = undefined,
.cli_link_inputs = .empty,
.windows_libs = .empty,
.link_inputs = .empty,
.c_source_files = .{},
.rc_source_files = .{},
.llvm_m_args = .{},
.sysroot = null,
.lib_directories = .{}, // populated by createModule()
.lib_dir_args = .{}, // populated from CLI arg parsing
.libc_installation = null,
.want_native_include_dirs = false,
.frameworks = .{},
.framework_dirs = .{},
.rpath_list = .{},
.each_lib_rpath = null,
.libc_paths_file = try EnvVar.ZIG_LIBC.get(arena),
.native_system_include_paths = &.{},
};
defer create_module.link_inputs.deinit(gpa);
// before arg parsing, check for the NO_COLOR and CLICOLOR_FORCE environment variables
// if set, default the color setting to .off or .on, respectively
// explicit --color arguments will still override this setting.
// Disable color on WASI per https://github.com/WebAssembly/WASI/issues/162
var color: Color = if (native_os == .wasi or EnvVar.NO_COLOR.isSet())
.off
else if (EnvVar.CLICOLOR_FORCE.isSet())
.on