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build.zig: bootstrap stage1 with zig0
Instead of assuming that the zig version used with `zig build` is appropriate for building the self-hosted compiler component, we follow the same path as the cmake build script and build zig0, using that to produce zig1.o, re-linking to produce stage1. This allows an arbitrarily old Zig version and corresponding build.zig script to build all future versions of Zig from source via the bootstrap compiler. In other words, it allows us to use `zig build` as an alternative to cmake when bootstrapping.
This commit is contained in:
Andrew Kelley
parent
2b3df5c81d
commit
cc9eb9e90f
1 changed files with 141 additions and 57 deletions
198
build.zig
198
build.zig
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@ -19,7 +19,7 @@ pub fn build(b: *Builder) !void {
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const single_threaded = b.option(bool, "single-threaded", "Build artifacts that run in single threaded mode");
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const use_zig_libcxx = b.option(bool, "use-zig-libcxx", "If libc++ is needed, use zig's bundled version, don't try to integrate with the system") orelse false;
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var docgen_exe = b.addExecutable("docgen", "doc/docgen.zig");
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const docgen_exe = b.addExecutable("docgen", "doc/docgen.zig");
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docgen_exe.single_threaded = single_threaded;
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const rel_zig_exe = try fs.path.relative(b.allocator, b.build_root, b.zig_exe);
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@ -27,7 +27,7 @@ pub fn build(b: *Builder) !void {
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b.allocator,
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&[_][]const u8{ b.cache_root, "langref.html" },
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) catch unreachable;
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var docgen_cmd = docgen_exe.run();
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const docgen_cmd = docgen_exe.run();
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docgen_cmd.addArgs(&[_][]const u8{
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rel_zig_exe,
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"doc" ++ fs.path.sep_str ++ "langref.html.in",
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@ -60,6 +60,7 @@ pub fn build(b: *Builder) !void {
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const skip_install_lib_files = b.option(bool, "skip-install-lib-files", "Do not copy lib/ files to installation prefix") orelse false;
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const only_install_lib_files = b.option(bool, "lib-files-only", "Only install library files") orelse false;
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const is_stage1 = b.option(bool, "stage1", "Build the stage1 compiler, put stage2 behind a feature flag") orelse false;
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const omit_stage2 = b.option(bool, "omit-stage2", "Do not include stage2 behind a feature flag inside stage1") orelse false;
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const static_llvm = b.option(bool, "static-llvm", "Disable integration with system-installed LLVM, Clang, LLD, and libc++") orelse false;
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@ -135,9 +136,9 @@ pub fn build(b: *Builder) !void {
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break :blk 4;
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};
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const main_file = if (is_stage1) "src/stage1.zig" else "src/main.zig";
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const main_file: ?[]const u8 = if (is_stage1) null else "src/main.zig";
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var exe = b.addExecutable("zig", main_file);
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const exe = b.addExecutable("zig", main_file);
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exe.strip = strip;
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exe.install();
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exe.setBuildMode(mode);
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@ -145,6 +146,7 @@ pub fn build(b: *Builder) !void {
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if (!skip_stage2_tests) {
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toolchain_step.dependOn(&exe.step);
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}
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b.default_step.dependOn(&exe.step);
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exe.single_threaded = single_threaded;
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@ -166,56 +168,6 @@ pub fn build(b: *Builder) !void {
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exe_options.addOption(bool, "llvm_has_arc", llvm_has_arc);
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exe_options.addOption(bool, "force_gpa", force_gpa);
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if (enable_llvm) {
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const cmake_cfg = if (static_llvm) null else findAndParseConfigH(b, config_h_path_option);
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if (is_stage1) {
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exe.addIncludePath("src");
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exe.addIncludePath("deps/SoftFloat-3e/source/include");
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test_stage2.addIncludePath("src");
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test_stage2.addIncludePath("deps/SoftFloat-3e/source/include");
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// This is intentionally a dummy path. stage1.zig tries to @import("compiler_rt") in case
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// of being built by cmake. But when built by zig it's gonna get a compiler_rt so that
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// is pointless.
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exe.addPackagePath("compiler_rt", "src/empty.zig");
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exe.defineCMacro("ZIG_LINK_MODE", "Static");
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test_stage2.defineCMacro("ZIG_LINK_MODE", "Static");
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const softfloat = b.addStaticLibrary("softfloat", null);
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softfloat.setBuildMode(.ReleaseFast);
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softfloat.setTarget(target);
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softfloat.addIncludePath("deps/SoftFloat-3e-prebuilt");
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softfloat.addIncludePath("deps/SoftFloat-3e/source/8086");
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softfloat.addIncludePath("deps/SoftFloat-3e/source/include");
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softfloat.addCSourceFiles(&softfloat_sources, &[_][]const u8{ "-std=c99", "-O3" });
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softfloat.single_threaded = single_threaded;
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exe.linkLibrary(softfloat);
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test_stage2.linkLibrary(softfloat);
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exe.addCSourceFiles(&stage1_sources, &exe_cflags);
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exe.addCSourceFiles(&optimized_c_sources, &[_][]const u8{ "-std=c99", "-O3" });
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test_stage2.addCSourceFiles(&stage1_sources, &exe_cflags);
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test_stage2.addCSourceFiles(&optimized_c_sources, &[_][]const u8{ "-std=c99", "-O3" });
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}
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if (cmake_cfg) |cfg| {
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// Inside this code path, we have to coordinate with system packaged LLVM, Clang, and LLD.
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// That means we also have to rely on stage1 compiled c++ files. We parse config.h to find
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// the information passed on to us from cmake.
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if (cfg.cmake_prefix_path.len > 0) {
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b.addSearchPrefix(cfg.cmake_prefix_path);
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}
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try addCmakeCfgOptionsToExe(b, cfg, exe, use_zig_libcxx);
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try addCmakeCfgOptionsToExe(b, cfg, test_stage2, use_zig_libcxx);
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} else {
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// Here we are -Denable-llvm but no cmake integration.
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try addStaticLlvmOptionsToExe(exe);
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try addStaticLlvmOptionsToExe(test_stage2);
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}
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}
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if (link_libc) {
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exe.linkLibC();
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test_stage2.linkLibC();
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@ -227,12 +179,12 @@ pub fn build(b: *Builder) !void {
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const opt_version_string = b.option([]const u8, "version-string", "Override Zig version string. Default is to find out with git.");
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const version = if (opt_version_string) |version| version else v: {
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const version_string = b.fmt("{d}.{d}.{d}", .{ zig_version.major, zig_version.minor, zig_version.patch });
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if (!std.process.can_spawn) {
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std.debug.print("error: version info cannot be retrieved from git. Zig version must be provided using -Dversion-string\n", .{});
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std.process.exit(1);
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}
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const version_string = b.fmt("{d}.{d}.{d}", .{ zig_version.major, zig_version.minor, zig_version.patch });
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var code: u8 = undefined;
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const git_describe_untrimmed = b.execAllowFail(&[_][]const u8{
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"git", "-C", b.build_root, "describe", "--match", "*.*.*", "--tags",
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@ -280,6 +232,108 @@ pub fn build(b: *Builder) !void {
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};
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exe_options.addOption([:0]const u8, "version", try b.allocator.dupeZ(u8, version));
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if (enable_llvm) {
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const cmake_cfg = if (static_llvm) null else findAndParseConfigH(b, config_h_path_option);
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if (is_stage1) {
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const softfloat = b.addStaticLibrary("softfloat", null);
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softfloat.setBuildMode(.ReleaseFast);
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softfloat.setTarget(target);
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softfloat.addIncludePath("deps/SoftFloat-3e-prebuilt");
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softfloat.addIncludePath("deps/SoftFloat-3e/source/8086");
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softfloat.addIncludePath("deps/SoftFloat-3e/source/include");
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softfloat.addCSourceFiles(&softfloat_sources, &[_][]const u8{ "-std=c99", "-O3" });
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softfloat.single_threaded = single_threaded;
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const zig0 = b.addExecutable("zig0", null);
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zig0.addCSourceFiles(&.{"src/stage1/zig0.cpp"}, &exe_cflags);
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zig0.addIncludePath("zig-cache/tmp"); // for config.h
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zig0.defineCMacro("ZIG_VERSION_MAJOR", b.fmt("{d}", .{zig_version.major}));
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zig0.defineCMacro("ZIG_VERSION_MINOR", b.fmt("{d}", .{zig_version.minor}));
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zig0.defineCMacro("ZIG_VERSION_PATCH", b.fmt("{d}", .{zig_version.patch}));
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zig0.defineCMacro("ZIG_VERSION_STRING", b.fmt("\"{s}\"", .{version}));
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for ([_]*std.build.LibExeObjStep{ zig0, exe }) |artifact| {
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artifact.addIncludePath("src");
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artifact.addIncludePath("deps/SoftFloat-3e/source/include");
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artifact.addIncludePath("deps/SoftFloat-3e-prebuilt");
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artifact.defineCMacro("ZIG_LINK_MODE", "Static");
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artifact.addCSourceFiles(&stage1_sources, &exe_cflags);
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artifact.addCSourceFiles(&optimized_c_sources, &[_][]const u8{ "-std=c99", "-O3" });
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artifact.linkLibrary(softfloat);
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artifact.linkLibCpp();
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}
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try addStaticLlvmOptionsToExe(zig0);
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const zig1_obj_ext = target.getObjectFormat().fileExt(target.getCpuArch());
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const zig1_obj_path = b.pathJoin(&.{ "zig-cache", "tmp", b.fmt("zig1{s}", .{zig1_obj_ext}) });
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const zig1_compiler_rt_path = b.pathJoin(&.{ b.pathFromRoot("lib"), "std", "special", "compiler_rt.zig" });
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const zig1_obj = zig0.run();
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zig1_obj.addArgs(&.{
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"src/stage1.zig",
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"-target",
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try target.zigTriple(b.allocator),
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"-mcpu=baseline",
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"--name",
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"zig1",
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"--zig-lib-dir",
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b.pathFromRoot("lib"),
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b.fmt("-femit-bin={s}", .{b.pathFromRoot(zig1_obj_path)}),
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"-fcompiler-rt",
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"-lc",
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});
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{
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zig1_obj.addArgs(&.{ "--pkg-begin", "build_options" });
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zig1_obj.addFileSourceArg(exe_options.getSource());
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zig1_obj.addArgs(&.{ "--pkg-end", "--pkg-begin", "compiler_rt", zig1_compiler_rt_path, "--pkg-end" });
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}
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switch (mode) {
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.Debug => {},
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.ReleaseFast => {
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zig1_obj.addArg("-OReleaseFast");
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zig1_obj.addArg("--strip");
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},
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.ReleaseSafe => {
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zig1_obj.addArg("-OReleaseSafe");
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zig1_obj.addArg("--strip");
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},
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.ReleaseSmall => {
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zig1_obj.addArg("-OReleaseSmall");
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zig1_obj.addArg("--strip");
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},
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}
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if (single_threaded orelse false) {
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zig1_obj.addArg("-fsingle-threaded");
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}
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exe.step.dependOn(&zig1_obj.step);
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exe.addObjectFile(zig1_obj_path);
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// This is intentionally a dummy path. stage1.zig tries to @import("compiler_rt") in case
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// of being built by cmake. But when built by zig it's gonna get a compiler_rt so that
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// is pointless.
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exe.addPackagePath("compiler_rt", "src/empty.zig");
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}
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if (cmake_cfg) |cfg| {
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// Inside this code path, we have to coordinate with system packaged LLVM, Clang, and LLD.
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// That means we also have to rely on stage1 compiled c++ files. We parse config.h to find
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// the information passed on to us from cmake.
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if (cfg.cmake_prefix_path.len > 0) {
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b.addSearchPrefix(cfg.cmake_prefix_path);
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}
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try addCmakeCfgOptionsToExe(b, cfg, exe, use_zig_libcxx);
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} else {
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// Here we are -Denable-llvm but no cmake integration.
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try addStaticLlvmOptionsToExe(exe);
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}
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}
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const semver = try std.SemanticVersion.parse(version);
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exe_options.addOption(std.SemanticVersion, "semver", semver);
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@ -548,7 +602,6 @@ fn addCxxKnownPath(
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) !void {
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if (!std.process.can_spawn)
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return error.RequiredLibraryNotFound;
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const path_padded = try b.exec(&[_][]const u8{
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ctx.cxx_compiler,
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b.fmt("-print-file-name={s}", .{objname}),
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@ -695,15 +748,19 @@ fn toNativePathSep(b: *Builder, s: []const u8) []u8 {
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const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/8086/f128M_isSignalingNaN.c",
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"deps/SoftFloat-3e/source/8086/extF80M_isSignalingNaN.c",
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"deps/SoftFloat-3e/source/8086/s_commonNaNToF128M.c",
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"deps/SoftFloat-3e/source/8086/s_commonNaNToExtF80M.c",
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"deps/SoftFloat-3e/source/8086/s_commonNaNToF16UI.c",
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"deps/SoftFloat-3e/source/8086/s_commonNaNToF32UI.c",
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"deps/SoftFloat-3e/source/8086/s_commonNaNToF64UI.c",
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"deps/SoftFloat-3e/source/8086/s_f128MToCommonNaN.c",
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"deps/SoftFloat-3e/source/8086/s_extF80MToCommonNaN.c",
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"deps/SoftFloat-3e/source/8086/s_f16UIToCommonNaN.c",
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"deps/SoftFloat-3e/source/8086/s_f32UIToCommonNaN.c",
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"deps/SoftFloat-3e/source/8086/s_f64UIToCommonNaN.c",
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"deps/SoftFloat-3e/source/8086/s_propagateNaNF128M.c",
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"deps/SoftFloat-3e/source/8086/s_propagateNaNExtF80M.c",
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"deps/SoftFloat-3e/source/8086/s_propagateNaNF16UI.c",
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"deps/SoftFloat-3e/source/8086/softfloat_raiseFlags.c",
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"deps/SoftFloat-3e/source/f128M_add.c",
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@ -723,6 +780,7 @@ const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/f128M_to_f16.c",
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"deps/SoftFloat-3e/source/f128M_to_f32.c",
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"deps/SoftFloat-3e/source/f128M_to_f64.c",
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"deps/SoftFloat-3e/source/f128M_to_extF80M.c",
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"deps/SoftFloat-3e/source/f128M_to_i32.c",
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"deps/SoftFloat-3e/source/f128M_to_i32_r_minMag.c",
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"deps/SoftFloat-3e/source/f128M_to_i64.c",
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@ -731,6 +789,20 @@ const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/f128M_to_ui32_r_minMag.c",
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"deps/SoftFloat-3e/source/f128M_to_ui64.c",
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"deps/SoftFloat-3e/source/f128M_to_ui64_r_minMag.c",
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"deps/SoftFloat-3e/source/extF80M_add.c",
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"deps/SoftFloat-3e/source/extF80M_div.c",
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"deps/SoftFloat-3e/source/extF80M_eq.c",
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"deps/SoftFloat-3e/source/extF80M_le.c",
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"deps/SoftFloat-3e/source/extF80M_lt.c",
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"deps/SoftFloat-3e/source/extF80M_mul.c",
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"deps/SoftFloat-3e/source/extF80M_rem.c",
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"deps/SoftFloat-3e/source/extF80M_roundToInt.c",
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"deps/SoftFloat-3e/source/extF80M_sqrt.c",
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"deps/SoftFloat-3e/source/extF80M_sub.c",
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"deps/SoftFloat-3e/source/extF80M_to_f16.c",
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"deps/SoftFloat-3e/source/extF80M_to_f32.c",
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"deps/SoftFloat-3e/source/extF80M_to_f64.c",
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"deps/SoftFloat-3e/source/extF80M_to_f128M.c",
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"deps/SoftFloat-3e/source/f16_add.c",
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"deps/SoftFloat-3e/source/f16_div.c",
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"deps/SoftFloat-3e/source/f16_eq.c",
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@ -742,9 +814,12 @@ const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/f16_roundToInt.c",
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"deps/SoftFloat-3e/source/f16_sqrt.c",
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"deps/SoftFloat-3e/source/f16_sub.c",
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"deps/SoftFloat-3e/source/f16_to_extF80M.c",
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"deps/SoftFloat-3e/source/f16_to_f128M.c",
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"deps/SoftFloat-3e/source/f16_to_f64.c",
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"deps/SoftFloat-3e/source/f32_to_extF80M.c",
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"deps/SoftFloat-3e/source/f32_to_f128M.c",
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"deps/SoftFloat-3e/source/f64_to_extF80M.c",
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"deps/SoftFloat-3e/source/f64_to_f128M.c",
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"deps/SoftFloat-3e/source/f64_to_f16.c",
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"deps/SoftFloat-3e/source/i32_to_f128M.c",
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@ -752,6 +827,7 @@ const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/s_addCarryM.c",
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"deps/SoftFloat-3e/source/s_addComplCarryM.c",
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"deps/SoftFloat-3e/source/s_addF128M.c",
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"deps/SoftFloat-3e/source/s_addExtF80M.c",
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"deps/SoftFloat-3e/source/s_addM.c",
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"deps/SoftFloat-3e/source/s_addMagsF16.c",
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"deps/SoftFloat-3e/source/s_addMagsF32.c",
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@ -762,12 +838,14 @@ const softfloat_sources = [_][]const u8{
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"deps/SoftFloat-3e/source/s_approxRecip_1Ks.c",
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"deps/SoftFloat-3e/source/s_compare128M.c",
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"deps/SoftFloat-3e/source/s_compare96M.c",
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"deps/SoftFloat-3e/source/s_compareNonnormExtF80M.c",
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"deps/SoftFloat-3e/source/s_countLeadingZeros16.c",
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"deps/SoftFloat-3e/source/s_countLeadingZeros32.c",
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"deps/SoftFloat-3e/source/s_countLeadingZeros64.c",
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"deps/SoftFloat-3e/source/s_countLeadingZeros8.c",
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"deps/SoftFloat-3e/source/s_eq128.c",
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"deps/SoftFloat-3e/source/s_invalidF128M.c",
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"deps/SoftFloat-3e/source/s_invalidExtF80M.c",
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"deps/SoftFloat-3e/source/s_isNaNF128M.c",
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"deps/SoftFloat-3e/source/s_le128.c",
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"deps/SoftFloat-3e/source/s_lt128.c",
|
||||
|
|
@ -778,7 +856,9 @@ const softfloat_sources = [_][]const u8{
|
|||
"deps/SoftFloat-3e/source/s_mulAddF32.c",
|
||||
"deps/SoftFloat-3e/source/s_mulAddF64.c",
|
||||
"deps/SoftFloat-3e/source/s_negXM.c",
|
||||
"deps/SoftFloat-3e/source/s_normExtF80SigM.c",
|
||||
"deps/SoftFloat-3e/source/s_normRoundPackMToF128M.c",
|
||||
"deps/SoftFloat-3e/source/s_normRoundPackMToExtF80M.c",
|
||||
"deps/SoftFloat-3e/source/s_normRoundPackToF16.c",
|
||||
"deps/SoftFloat-3e/source/s_normRoundPackToF32.c",
|
||||
"deps/SoftFloat-3e/source/s_normRoundPackToF64.c",
|
||||
|
|
@ -789,6 +869,7 @@ const softfloat_sources = [_][]const u8{
|
|||
"deps/SoftFloat-3e/source/s_remStepMBy32.c",
|
||||
"deps/SoftFloat-3e/source/s_roundMToI64.c",
|
||||
"deps/SoftFloat-3e/source/s_roundMToUI64.c",
|
||||
"deps/SoftFloat-3e/source/s_roundPackMToExtF80M.c",
|
||||
"deps/SoftFloat-3e/source/s_roundPackMToF128M.c",
|
||||
"deps/SoftFloat-3e/source/s_roundPackToF16.c",
|
||||
"deps/SoftFloat-3e/source/s_roundPackToF32.c",
|
||||
|
|
@ -817,9 +898,12 @@ const softfloat_sources = [_][]const u8{
|
|||
"deps/SoftFloat-3e/source/s_subMagsF32.c",
|
||||
"deps/SoftFloat-3e/source/s_subMagsF64.c",
|
||||
"deps/SoftFloat-3e/source/s_tryPropagateNaNF128M.c",
|
||||
"deps/SoftFloat-3e/source/s_tryPropagateNaNExtF80M.c",
|
||||
"deps/SoftFloat-3e/source/softfloat_state.c",
|
||||
"deps/SoftFloat-3e/source/ui32_to_f128M.c",
|
||||
"deps/SoftFloat-3e/source/ui64_to_f128M.c",
|
||||
"deps/SoftFloat-3e/source/ui32_to_extF80M.c",
|
||||
"deps/SoftFloat-3e/source/ui64_to_extF80M.c",
|
||||
};
|
||||
|
||||
const stage1_sources = [_][]const u8{
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue