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@andrewrk @Hejsil @mgxm @thejoshwolfe @kristate @bnoordhuis @myfreeweb
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const builtin = @import("builtin");
const std = @import("std");
const Builder = std.build.Builder;
const tests = @import("test/tests.zig");
const os = std.os;
const BufMap = std.BufMap;
const warn = std.debug.warn;
const mem = std.mem;
const ArrayList = std.ArrayList;
const Buffer = std.Buffer;
const io = std.io;
pub fn build(b: *Builder) !void {
const mode = b.standardReleaseOptions();
var docgen_exe = b.addExecutable("docgen", "doc/docgen.zig");
const rel_zig_exe = try os.path.relative(b.allocator, b.build_root, b.zig_exe);
const langref_out_path = os.path.join(
b.allocator,
[][]const u8{ b.cache_root, "langref.html" },
) catch unreachable;
var docgen_cmd = docgen_exe.run();
docgen_cmd.addArgs([][]const u8{
rel_zig_exe,
"doc" ++ os.path.sep_str ++ "langref.html.in",
langref_out_path,
});
docgen_cmd.step.dependOn(&docgen_exe.step);
const docs_step = b.step("docs", "Build documentation");
docs_step.dependOn(&docgen_cmd.step);
const test_step = b.step("test", "Run all the tests");
// find the stage0 build artifacts because we're going to re-use config.h and zig_cpp library
const build_info = try b.exec([][]const u8{
b.zig_exe,
"BUILD_INFO",
});
var index: usize = 0;
var ctx = Context{
.cmake_binary_dir = nextValue(&index, build_info),
.cxx_compiler = nextValue(&index, build_info),
.llvm_config_exe = nextValue(&index, build_info),
.lld_include_dir = nextValue(&index, build_info),
.lld_libraries = nextValue(&index, build_info),
.std_files = nextValue(&index, build_info),
.c_header_files = nextValue(&index, build_info),
.dia_guids_lib = nextValue(&index, build_info),
.llvm = undefined,
};
ctx.llvm = try findLLVM(b, ctx.llvm_config_exe);
var test_stage2 = b.addTest("src-self-hosted/test.zig");
test_stage2.setBuildMode(builtin.Mode.Debug);
const fmt_build_zig = b.addFmt([][]const u8{"build.zig"});
var exe = b.addExecutable("zig", "src-self-hosted/main.zig");
exe.setBuildMode(mode);
try configureStage2(b, test_stage2, ctx);
try configureStage2(b, exe, ctx);
b.default_step.dependOn(&exe.step);
addLibUserlandStep(b);
const skip_release = b.option(bool, "skip-release", "Main test suite skips release builds") orelse false;
const skip_release_small = b.option(bool, "skip-release-small", "Main test suite skips release-small builds") orelse skip_release;
const skip_release_fast = b.option(bool, "skip-release-fast", "Main test suite skips release-fast builds") orelse skip_release;
const skip_release_safe = b.option(bool, "skip-release-safe", "Main test suite skips release-safe builds") orelse skip_release;
const skip_non_native = b.option(bool, "skip-non-native", "Main test suite skips non-native builds") orelse false;
const skip_self_hosted = b.option(bool, "skip-self-hosted", "Main test suite skips building self hosted compiler") orelse false;
if (!skip_self_hosted) {
test_step.dependOn(&exe.step);
}
const verbose_link_exe = b.option(bool, "verbose-link", "Print link command for self hosted compiler") orelse false;
exe.setVerboseLink(verbose_link_exe);
b.installArtifact(exe);
installStdLib(b, ctx.std_files);
installCHeaders(b, ctx.c_header_files);
const test_filter = b.option([]const u8, "test-filter", "Skip tests that do not match filter");
const test_stage2_step = b.step("test-stage2", "Run the stage2 compiler tests");
test_stage2_step.dependOn(&test_stage2.step);
// TODO see https://github.com/ziglang/zig/issues/1364
if (false) {
test_step.dependOn(test_stage2_step);
}
var chosen_modes: [4]builtin.Mode = undefined;
var chosen_mode_index: usize = 0;
chosen_modes[chosen_mode_index] = builtin.Mode.Debug;
chosen_mode_index += 1;
if (!skip_release_safe) {
chosen_modes[chosen_mode_index] = builtin.Mode.ReleaseSafe;
chosen_mode_index += 1;
}
if (!skip_release_fast) {
chosen_modes[chosen_mode_index] = builtin.Mode.ReleaseFast;
chosen_mode_index += 1;
}
if (!skip_release_small) {
chosen_modes[chosen_mode_index] = builtin.Mode.ReleaseSmall;
chosen_mode_index += 1;
}
const modes = chosen_modes[0..chosen_mode_index];
// run stage1 `zig fmt` on this build.zig file just to make sure it works
test_step.dependOn(&fmt_build_zig.step);
const fmt_step = b.step("test-fmt", "Run zig fmt against build.zig to make sure it works");
fmt_step.dependOn(&fmt_build_zig.step);
test_step.dependOn(tests.addPkgTests(b, test_filter, "test/stage1/behavior.zig", "behavior", "Run the behavior tests", modes, skip_non_native));
test_step.dependOn(tests.addPkgTests(b, test_filter, "std/std.zig", "std", "Run the standard library tests", modes, skip_non_native));
test_step.dependOn(tests.addPkgTests(b, test_filter, "std/special/compiler_rt.zig", "compiler-rt", "Run the compiler_rt tests", modes, skip_non_native));
test_step.dependOn(tests.addCompareOutputTests(b, test_filter, modes));
test_step.dependOn(tests.addBuildExampleTests(b, test_filter, modes));
test_step.dependOn(tests.addCliTests(b, test_filter, modes));
test_step.dependOn(tests.addCompileErrorTests(b, test_filter, modes));
test_step.dependOn(tests.addAssembleAndLinkTests(b, test_filter, modes));
test_step.dependOn(tests.addRuntimeSafetyTests(b, test_filter, modes));
test_step.dependOn(tests.addTranslateCTests(b, test_filter));
test_step.dependOn(tests.addGenHTests(b, test_filter));
test_step.dependOn(docs_step);
}
fn dependOnLib(b: *Builder, lib_exe_obj: var, dep: LibraryDep) void {
for (dep.libdirs.toSliceConst()) |lib_dir| {
lib_exe_obj.addLibPath(lib_dir);
}
const lib_dir = os.path.join(
b.allocator,
[][]const u8{ dep.prefix, "lib" },
) catch unreachable;
for (dep.system_libs.toSliceConst()) |lib| {
const static_bare_name = if (mem.eql(u8, lib, "curses"))
([]const u8)("libncurses.a")
else
b.fmt("lib{}.a", lib);
const static_lib_name = os.path.join(
b.allocator,
[][]const u8{ lib_dir, static_bare_name },
) catch unreachable;
const have_static = fileExists(static_lib_name) catch unreachable;
if (have_static) {
lib_exe_obj.addObjectFile(static_lib_name);
} else {
lib_exe_obj.linkSystemLibrary(lib);
}
}
for (dep.libs.toSliceConst()) |lib| {
lib_exe_obj.addObjectFile(lib);
}
for (dep.includes.toSliceConst()) |include_path| {
lib_exe_obj.addIncludeDir(include_path);
}
}
fn fileExists(filename: []const u8) !bool {
os.File.access(filename) catch |err| switch (err) {
error.PermissionDenied,
error.FileNotFound,
=> return false,
else => return err,
};
return true;
}
fn addCppLib(b: *Builder, lib_exe_obj: var, cmake_binary_dir: []const u8, lib_name: []const u8) void {
const lib_prefix = if (lib_exe_obj.target.isWindows()) "" else "lib";
lib_exe_obj.addObjectFile(os.path.join(b.allocator, [][]const u8{
cmake_binary_dir,
"zig_cpp",
b.fmt("{}{}{}", lib_prefix, lib_name, lib_exe_obj.target.libFileExt()),
}) catch unreachable);
}
const LibraryDep = struct {
prefix: []const u8,
libdirs: ArrayList([]const u8),
libs: ArrayList([]const u8),
system_libs: ArrayList([]const u8),
includes: ArrayList([]const u8),
};
fn findLLVM(b: *Builder, llvm_config_exe: []const u8) !LibraryDep {
const shared_mode = try b.exec([][]const u8{ llvm_config_exe, "--shared-mode" });
const is_static = mem.startsWith(u8, shared_mode, "static");
const libs_output = if (is_static)
try b.exec([][]const u8{
llvm_config_exe,
"--libfiles",
"--system-libs",
})
else
try b.exec([][]const u8{
llvm_config_exe,
"--libs",
});
const includes_output = try b.exec([][]const u8{ llvm_config_exe, "--includedir" });
const libdir_output = try b.exec([][]const u8{ llvm_config_exe, "--libdir" });
const prefix_output = try b.exec([][]const u8{ llvm_config_exe, "--prefix" });
var result = LibraryDep{
.prefix = mem.tokenize(prefix_output, " \r\n").next().?,
.libs = ArrayList([]const u8).init(b.allocator),
.system_libs = ArrayList([]const u8).init(b.allocator),
.includes = ArrayList([]const u8).init(b.allocator),
.libdirs = ArrayList([]const u8).init(b.allocator),
};
{
var it = mem.tokenize(libs_output, " \r\n");
while (it.next()) |lib_arg| {
if (mem.startsWith(u8, lib_arg, "-l")) {
try result.system_libs.append(lib_arg[2..]);
} else {
if (os.path.isAbsolute(lib_arg)) {
try result.libs.append(lib_arg);
} else {
try result.system_libs.append(lib_arg);
}
}
}
}
{
var it = mem.tokenize(includes_output, " \r\n");
while (it.next()) |include_arg| {
if (mem.startsWith(u8, include_arg, "-I")) {
try result.includes.append(include_arg[2..]);
} else {
try result.includes.append(include_arg);
}
}
}
{
var it = mem.tokenize(libdir_output, " \r\n");
while (it.next()) |libdir| {
if (mem.startsWith(u8, libdir, "-L")) {
try result.libdirs.append(libdir[2..]);
} else {
try result.libdirs.append(libdir);
}
}
}
return result;
}
pub fn installStdLib(b: *Builder, stdlib_files: []const u8) void {
var it = mem.tokenize(stdlib_files, ";");
while (it.next()) |stdlib_file| {
const src_path = os.path.join(b.allocator, [][]const u8{ "std", stdlib_file }) catch unreachable;
const dest_path = os.path.join(
b.allocator,
[][]const u8{ "lib", "zig", "std", stdlib_file },
) catch unreachable;
b.installFile(src_path, dest_path);
}
}
pub fn installCHeaders(b: *Builder, c_header_files: []const u8) void {
var it = mem.tokenize(c_header_files, ";");
while (it.next()) |c_header_file| {
const src_path = os.path.join(b.allocator, [][]const u8{ "c_headers", c_header_file }) catch unreachable;
const dest_path = os.path.join(
b.allocator,
[][]const u8{ "lib", "zig", "include", c_header_file },
) catch unreachable;
b.installFile(src_path, dest_path);
}
}
fn nextValue(index: *usize, build_info: []const u8) []const u8 {
const start = index.*;
while (true) : (index.* += 1) {
switch (build_info[index.*]) {
'\n' => {
const result = build_info[start..index.*];
index.* += 1;
return result;
},
'\r' => {
const result = build_info[start..index.*];
index.* += 2;
return result;
},
else => continue,
}
}
}
fn configureStage2(b: *Builder, exe: var, ctx: Context) !void {
exe.addIncludeDir("src");
exe.addIncludeDir(ctx.cmake_binary_dir);
addCppLib(b, exe, ctx.cmake_binary_dir, "zig_cpp");
if (ctx.lld_include_dir.len != 0) {
exe.addIncludeDir(ctx.lld_include_dir);
var it = mem.tokenize(ctx.lld_libraries, ";");
while (it.next()) |lib| {
exe.addObjectFile(lib);
}
} else {
addCppLib(b, exe, ctx.cmake_binary_dir, "embedded_lld_wasm");
addCppLib(b, exe, ctx.cmake_binary_dir, "embedded_lld_elf");
addCppLib(b, exe, ctx.cmake_binary_dir, "embedded_lld_coff");
addCppLib(b, exe, ctx.cmake_binary_dir, "embedded_lld_lib");
}
dependOnLib(b, exe, ctx.llvm);
if (exe.target.getOs() == builtin.Os.linux) {
try addCxxKnownPath(b, ctx, exe, "libstdc++.a",
\\Unable to determine path to libstdc++.a
\\On Fedora, install libstdc++-static and try again.
);
exe.linkSystemLibrary("pthread");
} else if (exe.target.isFreeBSD()) {
try addCxxKnownPath(b, ctx, exe, "libc++.a", null);
exe.linkSystemLibrary("pthread");
} else if (exe.target.isDarwin()) {
if (addCxxKnownPath(b, ctx, exe, "libgcc_eh.a", "")) {
// Compiler is GCC.
try addCxxKnownPath(b, ctx, exe, "libstdc++.a", null);
exe.linkSystemLibrary("pthread");
// TODO LLD cannot perform this link.
// See https://github.com/ziglang/zig/issues/1535
exe.enableSystemLinkerHack();
} else |err| switch (err) {
error.RequiredLibraryNotFound => {
// System compiler, not gcc.
exe.linkSystemLibrary("c++");
},
else => return err,
}
}
if (ctx.dia_guids_lib.len != 0) {
exe.addObjectFile(ctx.dia_guids_lib);
}
exe.linkSystemLibrary("c");
}
fn addCxxKnownPath(
b: *Builder,
ctx: Context,
exe: var,
objname: []const u8,
errtxt: ?[]const u8,
) !void {
const path_padded = try b.exec([][]const u8{
ctx.cxx_compiler,
b.fmt("-print-file-name={}", objname),
});
const path_unpadded = mem.tokenize(path_padded, "\r\n").next().?;
if (mem.eql(u8, path_unpadded, objname)) {
if (errtxt) |msg| {
warn("{}", msg);
} else {
warn("Unable to determine path to {}\n", objname);
}
return error.RequiredLibraryNotFound;
}
exe.addObjectFile(path_unpadded);
}
const Context = struct {
cmake_binary_dir: []const u8,
cxx_compiler: []const u8,
llvm_config_exe: []const u8,
lld_include_dir: []const u8,
lld_libraries: []const u8,
std_files: []const u8,
c_header_files: []const u8,
dia_guids_lib: []const u8,
llvm: LibraryDep,
};
fn addLibUserlandStep(b: *Builder) void {
// Sadly macOS requires hacks to work around the buggy MACH-O linker code.
const artifact = if (builtin.os == .macosx)
b.addObject("userland", "src-self-hosted/stage1.zig")
else
b.addStaticLibrary("userland", "src-self-hosted/stage1.zig");
artifact.disable_gen_h = true;
if (builtin.os == .macosx) {
artifact.disable_stack_probing = true;
} else {
artifact.bundle_compiler_rt = true;
}
artifact.setTarget(builtin.arch, builtin.os, builtin.abi);
artifact.linkSystemLibrary("c");
const libuserland_step = b.step("libuserland", "Build the userland compiler library for use in stage1");
libuserland_step.dependOn(&artifact.step);
const output_dir = b.option(
[]const u8,
"output-dir",
"For libuserland step, where to put the output",
) orelse return;
artifact.setOutputDir(output_dir);
}
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