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main.zig
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main.zig
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const std = @import("std");
const builtin = @import("builtin");
const assert = std.debug.assert;
const io = std.io;
const fs = std.fs;
const mem = std.mem;
const process = std.process;
const Allocator = mem.Allocator;
const ArrayList = std.ArrayList;
const Ast = std.zig.Ast;
const warn = std.log.warn;
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 LibCInstallation = @import("libc_installation.zig").LibCInstallation;
const wasi_libc = @import("wasi_libc.zig");
const translate_c = @import("translate_c.zig");
const Cache = @import("Cache.zig");
const target_util = @import("target.zig");
const ThreadPool = @import("ThreadPool.zig");
const crash_report = @import("crash_report.zig");
// Crash report needs to override the panic handler and other root decls
pub usingnamespace crash_report.root_decls;
pub fn fatal(comptime format: []const u8, args: anytype) noreturn {
std.log.err(format, args);
process.exit(1);
}
/// There are many assumptions in the entire codebase that Zig source files can
/// be byte-indexed with a u32 integer.
pub const max_src_size = std.math.maxInt(u32);
pub const debug_extensions_enabled = builtin.mode == .Debug;
pub const Color = enum {
auto,
off,
on,
};
const normal_usage =
\\Usage: zig [command] [options]
\\
\\Commands:
\\
\\ build Build project from build.zig
\\ init-exe Initialize a `zig build` application in the cwd
\\ init-lib Initialize a `zig build` library in the cwd
\\
\\ ast-check Look for simple compile errors in any set of files
\\ 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
\\ fmt Reformat Zig source into canonical form
\\ run Create executable and run immediately
\\ test Create and run a test build
\\ 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
\\
\\ env Print lib path, std path, cache directory, and version
\\ help Print this help and exit
\\ 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
\\
;
const usage = if (debug_extensions_enabled) debug_usage else normal_usage;
pub const log_level: std.log.Level = switch (builtin.mode) {
.Debug => .debug,
.ReleaseSafe, .ReleaseFast => .info,
.ReleaseSmall => .err,
};
var log_scopes: std.ArrayListUnmanaged([]const u8) = .{};
pub fn log(
comptime level: std.log.Level,
comptime scope: @TypeOf(.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 (@enumToInt(level) > @enumToInt(std.log.level) or
@enumToInt(level) > @enumToInt(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;
}
const prefix1 = comptime level.asText();
const prefix2 = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
// Print the message to stderr, silently ignoring any errors
std.debug.print(prefix1 ++ prefix2 ++ format ++ "\n", args);
}
var general_purpose_allocator = std.heap.GeneralPurposeAllocator(.{
.stack_trace_frames = build_options.mem_leak_frames,
}){};
pub fn main() anyerror!void {
crash_report.initialize();
var gpa_need_deinit = false;
const gpa = gpa: {
if (!builtin.link_libc) {
gpa_need_deinit = true;
break :gpa general_purpose_allocator.allocator();
}
// 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) < @alignOf(i128)) {
break :gpa std.heap.c_allocator;
}
break :gpa std.heap.raw_c_allocator;
};
defer if (gpa_need_deinit) {
_ = general_purpose_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 (tracy.enable_allocation) {
var gpa_tracy = tracy.tracyAllocator(gpa);
return mainArgs(gpa_tracy.allocator(), arena, args);
}
return mainArgs(gpa, arena, args);
}
pub fn mainArgs(gpa: Allocator, arena: Allocator, args: []const []const u8) !void {
if (args.len <= 1) {
std.log.info("{s}", .{usage});
fatal("expected command argument", .{});
}
if (std.process.can_execv and std.os.getenvZ("ZIG_IS_DETECTING_LIBC_PATHS") != null) {
// 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 std.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 std.process.execve(arena, args[1..], &env_map);
} else {
const modified_args = try arena.dupe([]const u8, args);
modified_args[0] = "cc";
return std.process.execve(arena, modified_args, &env_map);
}
}
defer log_scopes.deinit(gpa);
const cmd = args[1];
const cmd_args = args[2..];
if (mem.eql(u8, cmd, "build-exe")) {
return buildOutputType(gpa, arena, args, .{ .build = .Exe });
} else if (mem.eql(u8, cmd, "build-lib")) {
return buildOutputType(gpa, arena, args, .{ .build = .Lib });
} else if (mem.eql(u8, cmd, "build-obj")) {
return buildOutputType(gpa, arena, args, .{ .build = .Obj });
} else if (mem.eql(u8, cmd, "test")) {
return buildOutputType(gpa, arena, args, .zig_test);
} else if (mem.eql(u8, cmd, "run")) {
return buildOutputType(gpa, arena, 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"))
{
return punt_to_llvm_ar(arena, args);
} else if (mem.eql(u8, cmd, "cc")) {
return buildOutputType(gpa, arena, args, .cc);
} else if (mem.eql(u8, cmd, "c++")) {
return buildOutputType(gpa, arena, args, .cpp);
} else if (mem.eql(u8, cmd, "translate-c")) {
return buildOutputType(gpa, arena, args, .translate_c);
} else if (mem.eql(u8, cmd, "clang") or
mem.eql(u8, cmd, "-cc1") or mem.eql(u8, cmd, "-cc1as"))
{
return punt_to_clang(arena, args);
} else if (mem.eql(u8, cmd, "ld.lld") or
mem.eql(u8, cmd, "lld-link") or
mem.eql(u8, cmd, "wasm-ld"))
{
return punt_to_lld(arena, args);
} else if (mem.eql(u8, cmd, "build")) {
return cmdBuild(gpa, arena, cmd_args);
} else if (mem.eql(u8, cmd, "fmt")) {
return cmdFmt(gpa, arena, cmd_args);
} else if (mem.eql(u8, cmd, "libc")) {
return cmdLibC(gpa, cmd_args);
} else if (mem.eql(u8, cmd, "init-exe")) {
return cmdInit(gpa, arena, cmd_args, .Exe);
} else if (mem.eql(u8, cmd, "init-lib")) {
return cmdInit(gpa, arena, cmd_args, .Lib);
} else if (mem.eql(u8, cmd, "targets")) {
const info = try detectNativeTargetInfo(arena, .{});
const stdout = io.getStdOut().writer();
return @import("print_targets.zig").cmdTargets(arena, cmd_args, stdout, info.target);
} else if (mem.eql(u8, cmd, "version")) {
return std.io.getStdOut().writeAll(build_options.version ++ "\n");
} else if (mem.eql(u8, cmd, "env")) {
return @import("print_env.zig").cmdEnv(arena, cmd_args, io.getStdOut().writer());
} else if (mem.eql(u8, cmd, "zen")) {
return io.getStdOut().writeAll(info_zen);
} else if (mem.eql(u8, cmd, "help") or mem.eql(u8, cmd, "-h") or mem.eql(u8, cmd, "--help")) {
return io.getStdOut().writeAll(usage);
} else if (mem.eql(u8, cmd, "ast-check")) {
return cmdAstCheck(gpa, arena, cmd_args);
} else if (debug_extensions_enabled and mem.eql(u8, cmd, "changelist")) {
return cmdChangelist(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++ 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
\\ --watch Enable compiler REPL
\\ --color [auto|off|on] Enable or disable colored error messages
\\ -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 LLVM IR (requires LLVM extensions)
\\ -fno-emit-llvm-ir (default) Do not produce a .ll file with LLVM IR
\\ -femit-llvm-bc[=path] Produce a LLVM module as a .bc file (requires LLVM extensions)
\\ -fno-emit-llvm-bc (default) Do not produce a 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-analysis[=path] Write analysis JSON file with type information
\\ -fno-emit-analysis (default) Do not write analysis JSON file with type information
\\ -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
\\ --enable-cache Output to cache directory; print path to stdout
\\
\\Compile Options:
\\ -target [name] <arch><sub>-<os>-<abi> see the targets command
\\ -mcpu [cpu] Specify target CPU and feature set
\\ -mcmodel=[default|tiny| Limit range of code and data virtual addresses
\\ small|kernel|
\\ medium|large]
\\ -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
\\ -mexec-model=[value] (WASI) Execution model
\\ --name [name] Override root name (not a file path)
\\ -O [mode] Choose what to optimize for
\\ Debug (default) Optimizations off, safety on
\\ ReleaseFast Optimizations on, safety off
\\ ReleaseSafe Optimizations on, safety on
\\ ReleaseSmall Optimize for small binary, safety off
\\ --pkg-begin [name] [path] Make pkg available to import and push current pkg
\\ --pkg-end Pop current pkg
\\ --main-pkg-path Set the directory of the root package
\\ -fPIC Force-enable Position Independent Code
\\ -fno-PIC Force-disable Position Independent Code
\\ -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
\\ -fstack-check Enable stack probing in unsafe builds
\\ -fno-stack-check Disable stack probing in safe builds
\\ -fsanitize-c Enable C undefined behavior detection in unsafe builds
\\ -fno-sanitize-c Disable C undefined behavior detection in safe builds
\\ -fvalgrind Include valgrind client requests in release builds
\\ -fno-valgrind Omit valgrind client requests in debug builds
\\ -fsanitize-thread Enable Thread Sanitizer
\\ -fno-sanitize-thread Disable Thread Sanitizer
\\ -fdll-export-fns Mark exported functions as DLL exports (Windows)
\\ -fno-dll-export-fns Force-disable marking exported functions as DLL exports
\\ -funwind-tables Always produce unwind table entries for all functions
\\ -fno-unwind-tables Never produce unwind table entries
\\ -fLLVM Force using LLVM as the codegen backend
\\ -fno-LLVM Prevent using LLVM as the codegen backend
\\ -fClang Force using Clang as the C/C++ compilation backend
\\ -fno-Clang Prevent using Clang as the C/C++ compilation backend
\\ -fstage1 Force using bootstrap compiler as the codegen backend
\\ -fno-stage1 Prevent using bootstrap compiler as the codegen backend
\\ -fsingle-threaded Code assumes there is only one thread
\\ -fno-single-threaded Code may not assume there is only one thread
\\ --strip Omit debug symbols
\\ -ofmt=[mode] 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
\\ -dirafter [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
\\ -D[macro]=[value] Define C [macro] to [value] (1 if [value] omitted)
\\ --libc [file] Provide a file which specifies libc paths
\\ -cflags [flags] -- Set extra flags for the next positional C source files
\\ -ffunction-sections Places each function in a separate section
\\
\\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]
\\ -L[d], --library-directory [d] Add a directory to the library search path
\\ -T[script], --script [script] Use a custom linker script
\\ --version-script [path] Provide a version .map file
\\ --dynamic-linker [path] Set the dynamic interpreter path (usually ld.so)
\\ --sysroot [path] Set the system root directory (usually /)
\\ --version [ver] Dynamic library semver
\\ -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
\\ -rdynamic Add all symbols to the dynamic symbol table
\\ -rpath [path] Add directory to the runtime library search path
\\ -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
\\ --eh-frame-hdr Enable C++ exception handling by passing --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
\\ origin Indicate that the object must have its origin processed
\\ noexecstack Indicate that the object requires an executable stack
\\ now Force all relocations to be processed on load
\\ relro Force all relocations to be resolved and be read-only on load
\\ -dynamic Force output to be dynamically linked
\\ -static Force output to be statically linked
\\ -Bsymbolic Bind global references locally
\\ --subsystem [subsystem] (Windows) /SUBSYSTEM:<subsystem> to the linker
\\ --stack [size] Override default stack size
\\ --image-base [addr] Set base address for executable image
\\ -framework [name] (Darwin) link against framework
\\ -F[dir] (Darwin) add search path for frameworks
\\ -install_name=[value] (Darwin) add dylib's install name
\\ --import-memory (WebAssembly) import memory from the 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
\\ --global-base=[addr] (WebAssembly) where to start to place global data
\\ --export=[value] (WebAssembly) Force a symbol to be exported
\\
\\Test Options:
\\ --test-filter [text] Skip tests that do not match filter
\\ --test-name-prefix [text] Add prefix to all tests
\\ --test-cmd [arg] Specify test execution command one arg at a time
\\ --test-cmd-bin Appends test binary path to test cmd args
\\ --test-evented-io Runs the test in evented I/O mode
\\ --test-no-exec Compiles test binary without running it
\\
\\Debug Options (Zig Compiler Development):
\\ -ftime-report Print timing diagnostics
\\ -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-mir Enable compiler debug output for Zig MIR
\\ --verbose-llvm-ir Enable compiler debug output for LLVM IR
\\ --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
\\
;
const repl_help =
\\Commands:
\\ update Detect changes to source files and update output files.
\\ run Execute the output file, if it is an executable or test.
\\ update-and-run Perform an `update` followed by `run`.
\\ help Print this text
\\ exit Quit this repl
\\
;
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 Resolved = struct {
data: ?Compilation.EmitLoc,
dir: ?fs.Dir,
fn deinit(self: *Resolved) void {
if (self.dir) |*dir| {
dir.close();
}
}
};
fn resolve(emit: Emit, default_basename: []const u8) !Resolved {
var resolved: Resolved = .{ .data = null, .dir = null };
errdefer resolved.deinit();
switch (emit) {
.no => {},
.yes_default_path => {
resolved.data = Compilation.EmitLoc{
.directory = .{ .path = null, .handle = fs.cwd() },
.basename = default_basename,
};
},
.yes => |full_path| {
const basename = fs.path.basename(full_path);
if (fs.path.dirname(full_path)) |dirname| {
const handle = try fs.cwd().openDir(dirname, .{});
resolved = .{
.dir = handle,
.data = Compilation.EmitLoc{
.basename = basename,
.directory = .{
.path = dirname,
.handle = handle,
},
},
};
} else {
resolved.data = Compilation.EmitLoc{
.basename = basename,
.directory = .{ .path = null, .handle = fs.cwd() },
};
}
},
}
return resolved;
}
};
fn optionalStringEnvVar(arena: Allocator, name: []const u8) !?[]const u8 {
if (std.process.getEnvVarOwned(arena, name)) |value| {
return value;
} else |err| switch (err) {
error.EnvironmentVariableNotFound => return null,
else => |e| return e,
}
}
const ArgMode = union(enum) {
build: std.builtin.OutputMode,
cc,
cpp,
translate_c,
zig_test,
run,
};
fn buildOutputType(
gpa: Allocator,
arena: Allocator,
all_args: []const []const u8,
arg_mode: ArgMode,
) !void {
var color: Color = .auto;
var optimize_mode: std.builtin.Mode = .Debug;
var provided_name: ?[]const u8 = null;
var link_mode: ?std.builtin.LinkMode = null;
var dll_export_fns: ?bool = null;
var single_threaded: ?bool = null;
var root_src_file: ?[]const u8 = null;
var version: std.builtin.Version = .{ .major = 0, .minor = 0, .patch = 0 };
var have_version = false;
var compatibility_version: ?std.builtin.Version = null;
var strip = false;
var function_sections = false;
var watch = false;
var debug_compile_errors = false;
var verbose_link = std.process.hasEnvVarConstant("ZIG_VERBOSE_LINK");
var verbose_cc = std.process.hasEnvVarConstant("ZIG_VERBOSE_CC");
var verbose_air = false;
var verbose_mir = false;
var verbose_llvm_ir = false;
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_analysis: Emit = .no;
var emit_implib: Emit = .yes_default_path;
var emit_implib_arg_provided = false;
var target_arch_os_abi: []const u8 = "native";
var target_mcpu: ?[]const u8 = null;
var target_dynamic_linker: ?[]const u8 = null;
var target_ofmt: ?[]const u8 = null;
var output_mode: std.builtin.OutputMode = undefined;
var emit_h: Emit = .no;
var soname: SOName = undefined;
var ensure_libc_on_non_freestanding = false;
var ensure_libcpp_on_non_freestanding = false;
var link_libc = false;
var link_libcpp = false;
var link_libunwind = false;
var want_native_include_dirs = false;
var enable_cache: ?bool = null;
var want_pic: ?bool = null;
var want_pie: ?bool = null;
var want_lto: ?bool = null;
var want_unwind_tables: ?bool = null;
var want_sanitize_c: ?bool = null;
var want_stack_check: ?bool = null;
var want_red_zone: ?bool = null;
var omit_frame_pointer: ?bool = null;
var want_valgrind: ?bool = null;
var want_tsan: ?bool = null;
var want_compiler_rt: ?bool = null;
var rdynamic: bool = false;
var linker_script: ?[]const u8 = null;
var version_script: ?[]const u8 = null;
var disable_c_depfile = false;
var linker_gc_sections: ?bool = null;
var linker_allow_shlib_undefined: ?bool = null;
var linker_bind_global_refs_locally: ?bool = null;
var linker_import_memory: ?bool = null;
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_z_nodelete = false;
var linker_z_notext = false;
var linker_z_defs = false;
var linker_z_origin = false;
var linker_z_noexecstack = false;
var linker_z_now = false;
var linker_z_relro = false;
var linker_tsaware = false;
var linker_nxcompat = false;
var linker_dynamicbase = false;
var linker_optimization: ?u8 = null;
var test_evented_io = false;
var test_no_exec = false;
var stack_size_override: ?u64 = null;
var image_base_override: ?u64 = null;
var use_llvm: ?bool = null;
var use_lld: ?bool = null;
var use_clang: ?bool = null;
var use_stage1: ?bool = null;
var link_eh_frame_hdr = false;
var link_emit_relocs = false;
var each_lib_rpath: ?bool = null;
var sysroot: ?[]const u8 = null;
var libc_paths_file: ?[]const u8 = try optionalStringEnvVar(arena, "ZIG_LIBC");
var machine_code_model: std.builtin.CodeModel = .default;
var runtime_args_start: ?usize = null;
var test_filter: ?[]const u8 = null;
var test_name_prefix: ?[]const u8 = null;
var override_local_cache_dir: ?[]const u8 = try optionalStringEnvVar(arena, "ZIG_LOCAL_CACHE_DIR");
var override_global_cache_dir: ?[]const u8 = null;
var override_lib_dir: ?[]const u8 = try optionalStringEnvVar(arena, "ZIG_LIB_DIR");
var main_pkg_path: ?[]const u8 = null;
var clang_preprocessor_mode: Compilation.ClangPreprocessorMode = .no;
var subsystem: ?std.Target.SubSystem = null;
var major_subsystem_version: ?u32 = null;
var minor_subsystem_version: ?u32 = null;
var wasi_exec_model: ?std.builtin.WasiExecModel = null;
var enable_link_snapshots: bool = false;
var native_darwin_sdk: ?std.zig.system.darwin.DarwinSDK = null;
var install_name: ?[]const u8 = null;
// e.g. -m3dnow or -mno-outline-atomics. They correspond to std.Target llvm cpu feature names.
// This array is populated by zig cc frontend and then has to be converted to zig-style
// CPU features.
var llvm_m_args = std.ArrayList([]const u8).init(gpa);
defer llvm_m_args.deinit();
var system_libs = std.StringArrayHashMap(Compilation.SystemLib).init(gpa);
defer system_libs.deinit();
var static_libs = std.ArrayList([]const u8).init(gpa);
defer static_libs.deinit();
var wasi_emulated_libs = std.ArrayList(wasi_libc.CRTFile).init(gpa);
defer wasi_emulated_libs.deinit();
var clang_argv = std.ArrayList([]const u8).init(gpa);
defer clang_argv.deinit();
var extra_cflags = std.ArrayList([]const u8).init(gpa);
defer extra_cflags.deinit();
var lib_dirs = std.ArrayList([]const u8).init(gpa);
defer lib_dirs.deinit();
var rpath_list = std.ArrayList([]const u8).init(gpa);
defer rpath_list.deinit();
var c_source_files = std.ArrayList(Compilation.CSourceFile).init(gpa);
defer c_source_files.deinit();
var link_objects = std.ArrayList([]const u8).init(gpa);
defer link_objects.deinit();
var framework_dirs = std.ArrayList([]const u8).init(gpa);
defer framework_dirs.deinit();
var frameworks = std.ArrayList([]const u8).init(gpa);
defer frameworks.deinit();
// null means replace with the test executable binary
var test_exec_args = std.ArrayList(?[]const u8).init(gpa);
defer test_exec_args.deinit();
var linker_export_symbol_names = std.ArrayList([]const u8).init(gpa);
defer linker_export_symbol_names.deinit();
// This package only exists to clean up the code parsing --pkg-begin and
// --pkg-end flags. Use dummy values that are safe for the destroy call.
var pkg_tree_root: Package = .{
.root_src_directory = .{ .path = null, .handle = fs.cwd() },
.root_src_path = &[0]u8{},
};
defer freePkgTree(gpa, &pkg_tree_root, false);
var cur_pkg: *Package = &pkg_tree_root;
// before arg parsing, check for the NO_COLOR environment variable
// if it exists, default the color setting to .off
// explicit --color arguments will still override this setting.
color = if (std.process.hasEnvVarConstant("NO_COLOR")) .off else .auto;
switch (arg_mode) {
.build, .translate_c, .zig_test, .run => {
var optimize_mode_string: ?[]const u8 = null;
switch (arg_mode) {
.build => |m| {
output_mode = m;
},
.translate_c => {
emit_bin = .no;
output_mode = .Obj;
},
.zig_test, .run => {
output_mode = .Exe;
},
else => unreachable,
}
soname = .yes_default_value;
const args = all_args[2..];
var i: usize = 0;
args_loop: while (i < args.len) : (i += 1) {
const arg = args[i];
if (mem.startsWith(u8, arg, "-")) {
if (mem.eql(u8, arg, "-h") or mem.eql(u8, arg, "--help")) {
try io.getStdOut().writeAll(usage_build_generic);
return cleanExit();
} else if (mem.eql(u8, arg, "--")) {
if (arg_mode == .run) {
// The index refers to all_args so skip `zig` `run`
// and `--`
runtime_args_start = i + 3;
break :args_loop;
} else {
fatal("unexpected end-of-parameter mark: --", .{});
}
} else if (mem.eql(u8, arg, "--pkg-begin")) {
if (i + 2 >= args.len) fatal("Expected 2 arguments after {s}", .{arg});
i += 1;
const pkg_name = args[i];
i += 1;
const pkg_path = args[i];
const new_cur_pkg = Package.create(
gpa,
fs.path.dirname(pkg_path),
fs.path.basename(pkg_path),
) catch |err| {
fatal("Failed to add package at path {s}: {s}", .{ pkg_path, @errorName(err) });
};
try cur_pkg.addAndAdopt(gpa, pkg_name, new_cur_pkg);
cur_pkg = new_cur_pkg;
} else if (mem.eql(u8, arg, "--pkg-end")) {
cur_pkg = cur_pkg.parent orelse
fatal("encountered --pkg-end with no matching --pkg-begin", .{});
} else if (mem.eql(u8, arg, "--main-pkg-path")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
main_pkg_path = args[i];
} else if (mem.eql(u8, arg, "-cflags")) {
extra_cflags.shrinkRetainingCapacity(0);
while (true) {
i += 1;
if (i >= args.len) fatal("expected -- after -cflags", .{});
if (mem.eql(u8, args[i], "--")) break;
try extra_cflags.append(args[i]);
}
} else if (mem.eql(u8, arg, "--color")) {
if (i + 1 >= args.len) {
fatal("expected [auto|on|off] after --color", .{});
}
i += 1;
const next_arg = args[i];
color = std.meta.stringToEnum(Color, next_arg) orelse {
fatal("expected [auto|on|off] after --color, found '{s}'", .{next_arg});
};
} else if (mem.eql(u8, arg, "--subsystem")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
if (mem.eql(u8, args[i], "console")) {
subsystem = .Console;
} else if (mem.eql(u8, args[i], "windows")) {
subsystem = .Windows;
} else if (mem.eql(u8, args[i], "posix")) {
subsystem = .Posix;
} else if (mem.eql(u8, args[i], "native")) {
subsystem = .Native;
} else if (mem.eql(u8, args[i], "efi_application")) {
subsystem = .EfiApplication;
} else if (mem.eql(u8, args[i], "efi_boot_service_driver")) {
subsystem = .EfiBootServiceDriver;
} else if (mem.eql(u8, args[i], "efi_rom")) {
subsystem = .EfiRom;
} else if (mem.eql(u8, args[i], "efi_runtime_driver")) {
subsystem = .EfiRuntimeDriver;
} else {
fatal("invalid: --subsystem: '{s}'. Options are:\n{s}", .{
args[i],
\\ console
\\ windows
\\ posix
\\ native
\\ efi_application
\\ efi_boot_service_driver
\\ efi_rom
\\ efi_runtime_driver
\\
});
}
} else if (mem.eql(u8, arg, "-O")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
optimize_mode_string = args[i];
} else if (mem.eql(u8, arg, "--stack")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
stack_size_override = std.fmt.parseUnsigned(u64, args[i], 0) catch |err| {
fatal("unable to parse '{s}': {s}", .{ arg, @errorName(err) });
};
} else if (mem.eql(u8, arg, "--image-base")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
image_base_override = std.fmt.parseUnsigned(u64, args[i], 0) catch |err| {
fatal("unable to parse '{s}': {s}", .{ arg, @errorName(err) });
};
} else if (mem.eql(u8, arg, "--name")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
provided_name = args[i];
} else if (mem.eql(u8, arg, "-rpath")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try rpath_list.append(args[i]);
} else if (mem.eql(u8, arg, "--library-directory") or mem.eql(u8, arg, "-L")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try lib_dirs.append(args[i]);
} else if (mem.eql(u8, arg, "-F")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try framework_dirs.append(args[i]);
} else if (mem.eql(u8, arg, "-framework")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try frameworks.append(args[i]);
} else if (mem.eql(u8, arg, "-install_name")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
install_name = args[i];
} else if (mem.eql(u8, arg, "-T") or mem.eql(u8, arg, "--script")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
linker_script = args[i];
} else if (mem.eql(u8, arg, "--version-script")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
version_script = args[i];
} else if (mem.eql(u8, arg, "--library") or mem.eql(u8, arg, "-l")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
// We don't know whether this library is part of libc or libc++ until
// we resolve the target, so we simply append to the list for now.
i += 1;
try system_libs.put(args[i], .{ .needed = false });
} else if (mem.eql(u8, arg, "--needed-library") or mem.eql(u8, arg, "-needed-l")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try system_libs.put(args[i], .{ .needed = true });
} else if (mem.eql(u8, arg, "-D") or
mem.eql(u8, arg, "-isystem") or
mem.eql(u8, arg, "-I") or
mem.eql(u8, arg, "-dirafter") or
mem.eql(u8, arg, "-iwithsysroot") or
mem.eql(u8, arg, "-iframework") or
mem.eql(u8, arg, "-iframeworkwithsysroot"))
{
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try clang_argv.append(arg);
try clang_argv.append(args[i]);
} else if (mem.eql(u8, arg, "--version")) {
if (i + 1 >= args.len) {
fatal("expected parameter after --version", .{});
}
i += 1;
version = std.builtin.Version.parse(args[i]) catch |err| {
fatal("unable to parse --version '{s}': {s}", .{ args[i], @errorName(err) });
};
have_version = true;
} else if (mem.eql(u8, arg, "-target")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
target_arch_os_abi = args[i];
} else if (mem.eql(u8, arg, "-mcpu")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
target_mcpu = args[i];
} else if (mem.eql(u8, arg, "-mcmodel")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
machine_code_model = parseCodeModel(args[i]);
} else if (mem.startsWith(u8, arg, "-ofmt=")) {
target_ofmt = arg["-ofmt=".len..];
} else if (mem.startsWith(u8, arg, "-mcpu=")) {
target_mcpu = arg["-mcpu=".len..];
} else if (mem.startsWith(u8, arg, "-mcmodel=")) {
machine_code_model = parseCodeModel(arg["-mcmodel=".len..]);
} else if (mem.startsWith(u8, arg, "-O")) {
optimize_mode_string = arg["-O".len..];
} else if (mem.eql(u8, arg, "--dynamic-linker")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
target_dynamic_linker = args[i];
} else if (mem.eql(u8, arg, "--sysroot")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
sysroot = args[i];
try clang_argv.append("-isysroot");
try clang_argv.append(args[i]);
} else if (mem.eql(u8, arg, "--libc")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
libc_paths_file = args[i];
} else if (mem.eql(u8, arg, "--test-filter")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
test_filter = args[i];
} else if (mem.eql(u8, arg, "--test-name-prefix")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
test_name_prefix = args[i];
} else if (mem.eql(u8, arg, "--test-cmd")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
try test_exec_args.append(args[i]);
} else if (mem.eql(u8, arg, "--cache-dir")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
override_local_cache_dir = args[i];
} else if (mem.eql(u8, arg, "--global-cache-dir")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
override_global_cache_dir = args[i];
} else if (mem.eql(u8, arg, "--zig-lib-dir")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
override_lib_dir = args[i];
} else if (mem.eql(u8, arg, "--debug-log")) {
if (i + 1 >= args.len) fatal("expected parameter after {s}", .{arg});
i += 1;
if (!build_options.enable_logging) {
std.log.warn("Zig was compiled without logging enabled (-Dlog). --debug-log has no effect.", .{});
} else {
try log_scopes.append(gpa, args[i]);
}
} else if (mem.eql(u8, arg, "--debug-link-snapshot")) {
if (!build_options.enable_link_snapshots) {
std.log.warn("Zig was compiled without linker snapshots enabled (-Dlink-snapshot). --debug-link-snapshot has no effect.", .{});
} else {
enable_link_snapshots = true;
}
} else if (mem.eql(u8, arg, "-fcompiler-rt")) {
want_compiler_rt = true;
} else if (mem.eql(u8, arg, "-fno-compiler-rt")) {
want_compiler_rt = false;