self-hosted: basic linker code for macos
Andrew Kelley
parent
7dbbddf2a6
commit
2614ef056a
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@ -275,6 +275,7 @@ pub const Compilation = struct {
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LinkFailed,
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LibCRequiredButNotProvidedOrFound,
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LibCMissingDynamicLinker,
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InvalidDarwinVersionString,
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};
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pub const Event = union(enum) {
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@ -170,7 +170,7 @@ pub const LibCInstallation = struct {
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try group.call(findNativeDynamicLinker, self, loop);
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},
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builtin.Os.macosx => {
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try group.call(findNativeIncludeDirMacOS, self, loop);
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self.include_dir = try std.mem.dupe(loop.allocator, u8, "/usr/include");
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},
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else => @compileError("unimplemented: find libc for this OS"),
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}
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@ -254,10 +254,6 @@ pub const LibCInstallation = struct {
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@panic("TODO");
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}
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async fn findNativeIncludeDirMacOS(self: *LibCInstallation, loop: *event.Loop) !void {
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self.include_dir = try std.mem.dupe(loop.allocator, u8, "/usr/include");
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}
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async fn findNativeLibDirWindows(self: *LibCInstallation, loop: *event.Loop) FindError!void {
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// TODO
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//ZigWindowsSDK *sdk = get_windows_sdk(g);
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@ -1,10 +1,12 @@
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const std = @import("std");
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const mem = std.mem;
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const c = @import("c.zig");
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const builtin = @import("builtin");
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const ObjectFormat = builtin.ObjectFormat;
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const Compilation = @import("compilation.zig").Compilation;
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const Target = @import("target.zig").Target;
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const LibCInstallation = @import("libc_installation.zig").LibCInstallation;
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const assert = std.debug.assert;
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const Context = struct {
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comp: *Compilation,
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@ -315,8 +317,163 @@ fn constructLinkerArgsCoff(ctx: *Context) void {
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@panic("TODO");
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}
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fn constructLinkerArgsMachO(ctx: *Context) void {
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@panic("TODO");
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fn constructLinkerArgsMachO(ctx: *Context) !void {
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try ctx.args.append(c"-demangle");
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if (ctx.comp.linker_rdynamic) {
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try ctx.args.append(c"-export_dynamic");
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}
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const is_lib = ctx.comp.kind == Compilation.Kind.Lib;
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const shared = !ctx.comp.is_static and is_lib;
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if (ctx.comp.is_static) {
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try ctx.args.append(c"-static");
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} else {
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try ctx.args.append(c"-dynamic");
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}
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//if (is_lib) {
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// if (!g->is_static) {
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// lj->args.append("-dylib");
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// Buf *compat_vers = buf_sprintf("%" ZIG_PRI_usize ".0.0", g->version_major);
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// lj->args.append("-compatibility_version");
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// lj->args.append(buf_ptr(compat_vers));
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// Buf *cur_vers = buf_sprintf("%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".%" ZIG_PRI_usize,
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// g->version_major, g->version_minor, g->version_patch);
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// lj->args.append("-current_version");
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// lj->args.append(buf_ptr(cur_vers));
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// // TODO getting an error when running an executable when doing this rpath thing
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// //Buf *dylib_install_name = buf_sprintf("@rpath/lib%s.%" ZIG_PRI_usize ".dylib",
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// // buf_ptr(g->root_out_name), g->version_major);
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// //lj->args.append("-install_name");
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// //lj->args.append(buf_ptr(dylib_install_name));
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// if (buf_len(&lj->out_file) == 0) {
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// buf_appendf(&lj->out_file, "lib%s.%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".dylib",
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// buf_ptr(g->root_out_name), g->version_major, g->version_minor, g->version_patch);
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// }
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// }
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//}
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try ctx.args.append(c"-arch");
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const darwin_arch_str = try std.cstr.addNullByte(
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&ctx.arena.allocator,
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ctx.comp.target.getDarwinArchString(),
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);
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try ctx.args.append(darwin_arch_str.ptr);
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const platform = try DarwinPlatform.get(ctx.comp);
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switch (platform.kind) {
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DarwinPlatform.Kind.MacOS => try ctx.args.append(c"-macosx_version_min"),
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DarwinPlatform.Kind.IPhoneOS => try ctx.args.append(c"-iphoneos_version_min"),
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DarwinPlatform.Kind.IPhoneOSSimulator => try ctx.args.append(c"-ios_simulator_version_min"),
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}
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const ver_str = try std.fmt.allocPrint(&ctx.arena.allocator, "{}.{}.{}\x00", platform.major, platform.minor, platform.micro);
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try ctx.args.append(ver_str.ptr);
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if (ctx.comp.kind == Compilation.Kind.Exe) {
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if (ctx.comp.is_static) {
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try ctx.args.append(c"-no_pie");
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} else {
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try ctx.args.append(c"-pie");
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}
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}
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try ctx.args.append(c"-o");
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try ctx.args.append(ctx.out_file_path.ptr());
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//for (size_t i = 0; i < g->rpath_list.length; i += 1) {
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// Buf *rpath = g->rpath_list.at(i);
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// add_rpath(lj, rpath);
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//}
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//add_rpath(lj, &lj->out_file);
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if (shared) {
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try ctx.args.append(c"-headerpad_max_install_names");
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} else if (ctx.comp.is_static) {
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try ctx.args.append(c"-lcrt0.o");
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} else {
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switch (platform.kind) {
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DarwinPlatform.Kind.MacOS => {
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if (platform.versionLessThan(10, 5)) {
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try ctx.args.append(c"-lcrt1.o");
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} else if (platform.versionLessThan(10, 6)) {
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try ctx.args.append(c"-lcrt1.10.5.o");
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} else if (platform.versionLessThan(10, 8)) {
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try ctx.args.append(c"-lcrt1.10.6.o");
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}
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},
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DarwinPlatform.Kind.IPhoneOS => {
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if (ctx.comp.target.getArch() == builtin.Arch.aarch64) {
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// iOS does not need any crt1 files for arm64
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} else if (platform.versionLessThan(3, 1)) {
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try ctx.args.append(c"-lcrt1.o");
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} else if (platform.versionLessThan(6, 0)) {
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try ctx.args.append(c"-lcrt1.3.1.o");
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}
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},
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DarwinPlatform.Kind.IPhoneOSSimulator => {}, // no crt1.o needed
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}
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}
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//for (size_t i = 0; i < g->lib_dirs.length; i += 1) {
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// const char *lib_dir = g->lib_dirs.at(i);
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// lj->args.append("-L");
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// lj->args.append(lib_dir);
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//}
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for (ctx.comp.link_objects) |link_object| {
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const link_obj_with_null = try std.cstr.addNullByte(&ctx.arena.allocator, link_object);
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try ctx.args.append(link_obj_with_null.ptr);
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}
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try addFnObjects(ctx);
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//// compiler_rt on darwin is missing some stuff, so we still build it and rely on LinkOnce
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//if (g->out_type == OutTypeExe || g->out_type == OutTypeLib) {
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// Buf *compiler_rt_o_path = build_compiler_rt(g);
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// lj->args.append(buf_ptr(compiler_rt_o_path));
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//}
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if (ctx.comp.target == Target.Native) {
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for (ctx.comp.link_libs_list.toSliceConst()) |lib| {
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if (mem.eql(u8, lib.name, "c")) {
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// on Darwin, libSystem has libc in it, but also you have to use it
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// to make syscalls because the syscall numbers are not documented
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// and change between versions.
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// so we always link against libSystem
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try ctx.args.append(c"-lSystem");
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} else {
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if (mem.indexOfScalar(u8, lib.name, '/') == null) {
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const arg = try std.fmt.allocPrint(&ctx.arena.allocator, "-l{}\x00", lib.name);
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try ctx.args.append(arg.ptr);
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} else {
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const arg = try std.cstr.addNullByte(&ctx.arena.allocator, lib.name);
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try ctx.args.append(arg.ptr);
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}
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}
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}
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} else {
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try ctx.args.append(c"-undefined");
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try ctx.args.append(c"dynamic_lookup");
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}
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if (platform.kind == DarwinPlatform.Kind.MacOS) {
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if (platform.versionLessThan(10, 5)) {
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try ctx.args.append(c"-lgcc_s.10.4");
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} else if (platform.versionLessThan(10, 6)) {
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try ctx.args.append(c"-lgcc_s.10.5");
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}
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} else {
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@panic("TODO");
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}
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//for (size_t i = 0; i < g->darwin_frameworks.length; i += 1) {
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// lj->args.append("-framework");
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// lj->args.append(buf_ptr(g->darwin_frameworks.at(i)));
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//}
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}
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fn constructLinkerArgsWasm(ctx: *Context) void {
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@ -341,3 +498,85 @@ fn addFnObjects(ctx: *Context) !void {
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it = node.next;
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}
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}
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const DarwinPlatform = struct {
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kind: Kind,
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major: u32,
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minor: u32,
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micro: u32,
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const Kind = enum {
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MacOS,
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IPhoneOS,
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IPhoneOSSimulator,
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};
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fn get(comp: *Compilation) !DarwinPlatform {
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var result: DarwinPlatform = undefined;
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const ver_str = switch (comp.darwin_version_min) {
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Compilation.DarwinVersionMin.MacOS => |ver| blk: {
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result.kind = Kind.MacOS;
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break :blk ver;
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},
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Compilation.DarwinVersionMin.Ios => |ver| blk: {
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result.kind = Kind.IPhoneOS;
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break :blk ver;
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},
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Compilation.DarwinVersionMin.None => blk: {
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assert(comp.target.getOs() == builtin.Os.macosx);
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result.kind = Kind.MacOS;
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break :blk "10.10";
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},
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};
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var had_extra: bool = undefined;
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try darwinGetReleaseVersion(ver_str, &result.major, &result.minor, &result.micro, &had_extra,);
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if (had_extra or result.major != 10 or result.minor >= 100 or result.micro >= 100) {
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return error.InvalidDarwinVersionString;
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}
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if (result.kind == Kind.IPhoneOS) {
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switch (comp.target.getArch()) {
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builtin.Arch.i386,
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builtin.Arch.x86_64,
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=> result.kind = Kind.IPhoneOSSimulator,
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else => {},
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}
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}
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return result;
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}
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fn versionLessThan(self: DarwinPlatform, major: u32, minor: u32) bool {
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if (self.major < major)
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return true;
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if (self.major > major)
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return false;
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if (self.minor < minor)
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return true;
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return false;
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}
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};
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/// Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
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/// grouped values as integers. Numbers which are not provided are set to 0.
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/// return true if the entire string was parsed (9.2), or all groups were
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/// parsed (10.3.5extrastuff).
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fn darwinGetReleaseVersion(str: []const u8, major: *u32, minor: *u32, micro: *u32, had_extra: *bool) !void {
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major.* = 0;
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minor.* = 0;
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micro.* = 0;
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had_extra.* = false;
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if (str.len == 0)
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return error.InvalidDarwinVersionString;
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var start_pos: usize = 0;
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for ([]*u32{major, minor, micro}) |v| {
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const dot_pos = mem.indexOfScalarPos(u8, str, start_pos, '.');
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const end_pos = dot_pos orelse str.len;
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v.* = std.fmt.parseUnsigned(u32, str[start_pos..end_pos], 10) catch return error.InvalidDarwinVersionString;
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start_pos = (dot_pos orelse return) + 1;
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if (start_pos == str.len) return;
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}
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had_extra.* = true;
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}
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@ -526,4 +526,37 @@ pub const Target = union(enum) {
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=> @panic("TODO specify the C integer type sizes for this OS"),
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}
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}
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pub fn getDarwinArchString(self: Target) []const u8 {
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const arch = self.getArch();
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switch (arch) {
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builtin.Arch.aarch64 => return "arm64",
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builtin.Arch.thumb,
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builtin.Arch.armv8_3a,
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builtin.Arch.armv8_2a,
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builtin.Arch.armv8_1a,
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builtin.Arch.armv8,
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builtin.Arch.armv8r,
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builtin.Arch.armv8m_baseline,
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builtin.Arch.armv8m_mainline,
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builtin.Arch.armv7,
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builtin.Arch.armv7em,
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builtin.Arch.armv7m,
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builtin.Arch.armv7s,
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builtin.Arch.armv7k,
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builtin.Arch.armv7ve,
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builtin.Arch.armv6,
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builtin.Arch.armv6m,
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builtin.Arch.armv6k,
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builtin.Arch.armv6t2,
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builtin.Arch.armv5,
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builtin.Arch.armv5te,
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builtin.Arch.armv4t,
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=> return "arm",
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builtin.Arch.powerpc => return "ppc",
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builtin.Arch.powerpc64 => return "ppc64",
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builtin.Arch.powerpc64le => return "ppc64le",
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else => return @tagName(arch),
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}
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}
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};
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@ -901,7 +901,7 @@ static void construct_linker_job_macho(LinkJob *lj) {
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if (strchr(buf_ptr(link_lib->name), '/') == nullptr) {
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Buf *arg = buf_sprintf("-l%s", buf_ptr(link_lib->name));
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lj->args.append(buf_ptr(arg));
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} else {
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} else {
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lj->args.append(buf_ptr(link_lib->name));
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}
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}
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