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const std = @import("std");
const llvm = @import("codegen/llvm/bindings.zig");
pub const ArchOsAbi = struct {
arch: std.Target.Cpu.Arch,
os: std.Target.Os.Tag,
abi: std.Target.Abi,
os_ver: ?std.builtin.Version = null,
};
pub const available_libcs = [_]ArchOsAbi{
.{ .arch = .aarch64_be, .os = .linux, .abi = .gnu },
.{ .arch = .aarch64_be, .os = .linux, .abi = .musl },
.{ .arch = .aarch64_be, .os = .windows, .abi = .gnu },
.{ .arch = .aarch64, .os = .linux, .abi = .gnu },
.{ .arch = .aarch64, .os = .linux, .abi = .musl },
.{ .arch = .aarch64, .os = .windows, .abi = .gnu },
.{ .arch = .aarch64, .os = .macos, .abi = .gnu, .os_ver = .{ .major = 11, .minor = 0 } },
.{ .arch = .aarch64, .os = .macos, .abi = .gnu, .os_ver = .{ .major = 12, .minor = 0 } },
.{ .arch = .armeb, .os = .linux, .abi = .gnueabi },
.{ .arch = .armeb, .os = .linux, .abi = .gnueabihf },
.{ .arch = .armeb, .os = .linux, .abi = .musleabi },
.{ .arch = .armeb, .os = .linux, .abi = .musleabihf },
.{ .arch = .armeb, .os = .windows, .abi = .gnu },
.{ .arch = .arm, .os = .linux, .abi = .gnueabi },
.{ .arch = .arm, .os = .linux, .abi = .gnueabihf },
.{ .arch = .arm, .os = .linux, .abi = .musleabi },
.{ .arch = .arm, .os = .linux, .abi = .musleabihf },
.{ .arch = .thumb, .os = .linux, .abi = .gnueabi },
.{ .arch = .thumb, .os = .linux, .abi = .gnueabihf },
.{ .arch = .thumb, .os = .linux, .abi = .musleabi },
.{ .arch = .thumb, .os = .linux, .abi = .musleabihf },
.{ .arch = .arm, .os = .windows, .abi = .gnu },
.{ .arch = .csky, .os = .linux, .abi = .gnueabi },
.{ .arch = .csky, .os = .linux, .abi = .gnueabihf },
.{ .arch = .i386, .os = .linux, .abi = .gnu },
.{ .arch = .i386, .os = .linux, .abi = .musl },
.{ .arch = .i386, .os = .windows, .abi = .gnu },
.{ .arch = .m68k, .os = .linux, .abi = .gnu },
.{ .arch = .m68k, .os = .linux, .abi = .musl },
.{ .arch = .mips64el, .os = .linux, .abi = .gnuabi64 },
.{ .arch = .mips64el, .os = .linux, .abi = .gnuabin32 },
.{ .arch = .mips64el, .os = .linux, .abi = .musl },
.{ .arch = .mips64, .os = .linux, .abi = .gnuabi64 },
.{ .arch = .mips64, .os = .linux, .abi = .gnuabin32 },
.{ .arch = .mips64, .os = .linux, .abi = .musl },
.{ .arch = .mipsel, .os = .linux, .abi = .gnueabi },
.{ .arch = .mipsel, .os = .linux, .abi = .gnueabihf },
.{ .arch = .mipsel, .os = .linux, .abi = .musl },
.{ .arch = .mips, .os = .linux, .abi = .gnueabi },
.{ .arch = .mips, .os = .linux, .abi = .gnueabihf },
.{ .arch = .mips, .os = .linux, .abi = .musl },
.{ .arch = .powerpc64le, .os = .linux, .abi = .gnu },
.{ .arch = .powerpc64le, .os = .linux, .abi = .musl },
.{ .arch = .powerpc64, .os = .linux, .abi = .gnu },
.{ .arch = .powerpc64, .os = .linux, .abi = .musl },
.{ .arch = .powerpc, .os = .linux, .abi = .gnueabi },
.{ .arch = .powerpc, .os = .linux, .abi = .gnueabihf },
.{ .arch = .powerpc, .os = .linux, .abi = .musl },
.{ .arch = .riscv64, .os = .linux, .abi = .gnu },
.{ .arch = .riscv64, .os = .linux, .abi = .musl },
.{ .arch = .s390x, .os = .linux, .abi = .gnu },
.{ .arch = .s390x, .os = .linux, .abi = .musl },
.{ .arch = .sparc, .os = .linux, .abi = .gnu },
.{ .arch = .sparcv9, .os = .linux, .abi = .gnu },
.{ .arch = .wasm32, .os = .freestanding, .abi = .musl },
.{ .arch = .wasm32, .os = .wasi, .abi = .musl },
.{ .arch = .x86_64, .os = .linux, .abi = .gnu },
.{ .arch = .x86_64, .os = .linux, .abi = .gnux32 },
.{ .arch = .x86_64, .os = .linux, .abi = .musl },
.{ .arch = .x86_64, .os = .windows, .abi = .gnu },
.{ .arch = .x86_64, .os = .macos, .abi = .gnu, .os_ver = .{ .major = 10, .minor = 0 } },
.{ .arch = .x86_64, .os = .macos, .abi = .gnu, .os_ver = .{ .major = 11, .minor = 0 } },
.{ .arch = .x86_64, .os = .macos, .abi = .gnu, .os_ver = .{ .major = 12, .minor = 0 } },
};
pub fn libCGenericName(target: std.Target) [:0]const u8 {
switch (target.os.tag) {
.windows => return "mingw",
.macos, .ios, .tvos, .watchos => return "darwin",
else => {},
}
switch (target.abi) {
.gnu,
.gnuabin32,
.gnuabi64,
.gnueabi,
.gnueabihf,
.gnux32,
.gnuilp32,
=> return "glibc",
.musl,
.musleabi,
.musleabihf,
.muslx32,
.none,
=> return "musl",
.code16,
.eabi,
.eabihf,
.android,
.msvc,
.itanium,
.cygnus,
.coreclr,
.simulator,
.macabi,
=> unreachable,
}
}
pub fn osArchName(target: std.Target) [:0]const u8 {
return switch (target.os.tag) {
.linux => switch (target.cpu.arch) {
.arm, .armeb, .thumb, .thumbeb => "arm",
.aarch64, .aarch64_be, .aarch64_32 => "aarch64",
.mips, .mipsel, .mips64, .mips64el => "mips",
.powerpc, .powerpcle, .powerpc64, .powerpc64le => "powerpc",
.riscv32, .riscv64 => "riscv",
.sparc, .sparcel, .sparcv9 => "sparc",
.i386, .x86_64 => "x86",
else => @tagName(target.cpu.arch),
},
else => @tagName(target.cpu.arch),
};
}
pub fn canBuildLibC(target: std.Target) bool {
for (available_libcs) |libc| {
if (target.cpu.arch == libc.arch and target.os.tag == libc.os and target.abi == libc.abi) {
if (target.os.tag == .macos) {
const ver = target.os.version_range.semver;
if (ver.min.major != libc.os_ver.?.major) continue; // no match, keep going
}
return true;
}
}
return false;
}
pub fn cannotDynamicLink(target: std.Target) bool {
return switch (target.os.tag) {
.freestanding, .other => true,
else => false,
};
}
/// On Darwin, we always link libSystem which contains libc.
/// Similarly on FreeBSD and NetBSD we always link system libc
/// since this is the stable syscall interface.
pub fn osRequiresLibC(target: std.Target) bool {
return target.os.requiresLibC();
}
pub fn libcNeedsLibUnwind(target: std.Target) bool {
return switch (target.os.tag) {
.macos,
.ios,
.watchos,
.tvos,
.freestanding,
.wasi, // Wasm/WASI currently doesn't offer support for libunwind, so don't link it.
=> false,
.windows => target.abi != .msvc,
else => true,
};
}
pub fn requiresPIE(target: std.Target) bool {
return target.isAndroid() or target.isDarwin() or target.os.tag == .openbsd;
}
/// This function returns whether non-pic code is completely invalid on the given target.
pub fn requiresPIC(target: std.Target, linking_libc: bool) bool {
return target.isAndroid() or
target.os.tag == .windows or target.os.tag == .uefi or
osRequiresLibC(target) or
(linking_libc and target.isGnuLibC());
}
/// This is not whether the target supports Position Independent Code, but whether the -fPIC
/// C compiler argument is valid to Clang.
pub fn supports_fpic(target: std.Target) bool {
return target.os.tag != .windows;
}
pub fn isSingleThreaded(target: std.Target) bool {
return target.isWasm();
}
/// Valgrind supports more, but Zig does not support them yet.
pub fn hasValgrindSupport(target: std.Target) bool {
switch (target.cpu.arch) {
.x86_64 => {
return target.os.tag == .linux or target.os.tag == .solaris or
(target.os.tag == .windows and target.abi != .msvc);
},
else => return false,
}
}
/// The set of targets that LLVM has non-experimental support for.
/// Used to select between LLVM backend and self-hosted backend when compiling in
/// release modes.
pub fn hasLlvmSupport(target: std.Target) bool {
return switch (target.cpu.arch) {
.arm,
.armeb,
.aarch64,
.aarch64_be,
.aarch64_32,
.arc,
.avr,
.bpfel,
.bpfeb,
.csky,
.hexagon,
.m68k,
.mips,
.mipsel,
.mips64,
.mips64el,
.msp430,
.powerpc,
.powerpcle,
.powerpc64,
.powerpc64le,
.r600,
.amdgcn,
.riscv32,
.riscv64,
.sparc,
.sparcv9,
.sparcel,
.s390x,
.tce,
.tcele,
.thumb,
.thumbeb,
.i386,
.x86_64,
.xcore,
.nvptx,
.nvptx64,
.le32,
.le64,
.amdil,
.amdil64,
.hsail,
.hsail64,
.spir,
.spir64,
.kalimba,
.shave,
.lanai,
.wasm32,
.wasm64,
.renderscript32,
.renderscript64,
.ve,
=> true,
.spu_2,
.spirv32,
.spirv64,
=> false,
};
}
/// The set of targets that our own self-hosted backends have robust support for.
/// Used to select between LLVM backend and self-hosted backend when compiling in
/// debug mode. A given target should only return true here if it is passing greater
/// than or equal to the number of behavior tests as the respective LLVM backend.
pub fn selfHostedBackendIsAsRobustAsLlvm(target: std.Target) bool {
_ = target;
return false;
}
pub fn supportsStackProbing(target: std.Target) bool {
return target.os.tag != .windows and target.os.tag != .uefi and
(target.cpu.arch == .i386 or target.cpu.arch == .x86_64);
}
pub fn osToLLVM(os_tag: std.Target.Os.Tag) llvm.OSType {
return switch (os_tag) {
.freestanding, .other, .opencl, .glsl450, .vulkan, .plan9 => .UnknownOS,
.windows, .uefi => .Win32,
.ananas => .Ananas,
.cloudabi => .CloudABI,
.dragonfly => .DragonFly,
.freebsd => .FreeBSD,
.fuchsia => .Fuchsia,
.ios => .IOS,
.kfreebsd => .KFreeBSD,
.linux => .Linux,
.lv2 => .Lv2,
.macos => .MacOSX,
.netbsd => .NetBSD,
.openbsd => .OpenBSD,
.solaris => .Solaris,
.zos => .ZOS,
.haiku => .Haiku,
.minix => .Minix,
.rtems => .RTEMS,
.nacl => .NaCl,
.aix => .AIX,
.cuda => .CUDA,
.nvcl => .NVCL,
.amdhsa => .AMDHSA,
.ps4 => .PS4,
.elfiamcu => .ELFIAMCU,
.tvos => .TvOS,
.watchos => .WatchOS,
.mesa3d => .Mesa3D,
.contiki => .Contiki,
.amdpal => .AMDPAL,
.hermit => .HermitCore,
.hurd => .Hurd,
.wasi => .WASI,
.emscripten => .Emscripten,
};
}
pub fn archToLLVM(arch_tag: std.Target.Cpu.Arch) llvm.ArchType {
return switch (arch_tag) {
.arm => .arm,
.armeb => .armeb,
.aarch64 => .aarch64,
.aarch64_be => .aarch64_be,
.aarch64_32 => .aarch64_32,
.arc => .arc,
.avr => .avr,
.bpfel => .bpfel,
.bpfeb => .bpfeb,
.csky => .csky,
.hexagon => .hexagon,
.m68k => .m68k,
.mips => .mips,
.mipsel => .mipsel,
.mips64 => .mips64,
.mips64el => .mips64el,
.msp430 => .msp430,
.powerpc => .ppc,
.powerpcle => .ppcle,
.powerpc64 => .ppc64,
.powerpc64le => .ppc64le,
.r600 => .r600,
.amdgcn => .amdgcn,
.riscv32 => .riscv32,
.riscv64 => .riscv64,
.sparc => .sparc,
.sparcv9 => .sparcv9,
.sparcel => .sparcel,
.s390x => .systemz,
.tce => .tce,
.tcele => .tcele,
.thumb => .thumb,
.thumbeb => .thumbeb,
.i386 => .x86,
.x86_64 => .x86_64,
.xcore => .xcore,
.nvptx => .nvptx,
.nvptx64 => .nvptx64,
.le32 => .le32,
.le64 => .le64,
.amdil => .amdil,
.amdil64 => .amdil64,
.hsail => .hsail,
.hsail64 => .hsail64,
.spir => .spir,
.spir64 => .spir64,
.kalimba => .kalimba,
.shave => .shave,
.lanai => .lanai,
.wasm32 => .wasm32,
.wasm64 => .wasm64,
.renderscript32 => .renderscript32,
.renderscript64 => .renderscript64,
.ve => .ve,
.spu_2, .spirv32, .spirv64 => .UnknownArch,
};
}
fn eqlIgnoreCase(ignore_case: bool, a: []const u8, b: []const u8) bool {
if (ignore_case) {
return std.ascii.eqlIgnoreCase(a, b);
} else {
return std.mem.eql(u8, a, b);
}
}
pub fn is_libc_lib_name(target: std.Target, name: []const u8) bool {
const ignore_case = target.os.tag.isDarwin() or target.os.tag == .windows;
if (eqlIgnoreCase(ignore_case, name, "c"))
return true;
if (target.isMinGW()) {
if (eqlIgnoreCase(ignore_case, name, "m"))
return true;
return false;
}
if (target.abi.isGnu() or target.abi.isMusl() or target.os.tag.isDarwin()) {
if (eqlIgnoreCase(ignore_case, name, "m"))
return true;
if (eqlIgnoreCase(ignore_case, name, "rt"))
return true;
if (eqlIgnoreCase(ignore_case, name, "pthread"))
return true;
if (eqlIgnoreCase(ignore_case, name, "crypt"))
return true;
if (eqlIgnoreCase(ignore_case, name, "util"))
return true;
if (eqlIgnoreCase(ignore_case, name, "xnet"))
return true;
if (eqlIgnoreCase(ignore_case, name, "resolv"))
return true;
if (eqlIgnoreCase(ignore_case, name, "dl"))
return true;
}
if (target.os.tag.isDarwin() and eqlIgnoreCase(ignore_case, name, "System"))
return true;
return false;
}
pub fn is_libcpp_lib_name(target: std.Target, name: []const u8) bool {
const ignore_case = target.os.tag.isDarwin() or target.os.tag == .windows;
return eqlIgnoreCase(ignore_case, name, "c++") or
eqlIgnoreCase(ignore_case, name, "stdc++") or
eqlIgnoreCase(ignore_case, name, "c++abi");
}
pub const CompilerRtClassification = enum { none, only_compiler_rt, only_libunwind, both };
pub fn classifyCompilerRtLibName(target: std.Target, name: []const u8) CompilerRtClassification {
if (target.abi.isGnu() and std.mem.eql(u8, name, "gcc_s")) {
// libgcc_s includes exception handling functions, so if linking this library
// is requested, zig needs to instead link libunwind. Otherwise we end up with
// the linker unable to find `_Unwind_RaiseException` and other related symbols.
return .both;
}
if (std.mem.eql(u8, name, "compiler_rt")) {
return .only_compiler_rt;
}
if (std.mem.eql(u8, name, "unwind")) {
return .only_libunwind;
}
return .none;
}
pub fn hasDebugInfo(target: std.Target) bool {
_ = target;
return true;
}
pub fn defaultCompilerRtOptimizeMode(target: std.Target) std.builtin.Mode {
if (target.cpu.arch.isWasm() and target.os.tag == .freestanding) {
return .ReleaseSmall;
} else {
return .ReleaseFast;
}
}
pub fn hasRedZone(target: std.Target) bool {
return switch (target.cpu.arch) {
.x86_64,
.i386,
.powerpc,
.powerpc64,
.powerpc64le,
.aarch64,
.aarch64_be,
.aarch64_32,
=> true,
else => false,
};
}
pub fn libcFullLinkFlags(target: std.Target) []const []const u8 {
// The linking order of these is significant and should match the order other
// c compilers such as gcc or clang use.
return switch (target.os.tag) {
.netbsd, .openbsd => &[_][]const u8{
"-lm",
"-lpthread",
"-lc",
"-lutil",
},
.solaris => &[_][]const u8{
"-lm",
"-lsocket",
"-lnsl",
// Solaris releases after 10 merged the threading libraries into libc.
"-lc",
},
.haiku => &[_][]const u8{
"-lm",
"-lroot",
"-lpthread",
"-lc",
},
else => switch (target.abi) {
.android => &[_][]const u8{
"-lm",
"-lc",
"-ldl",
},
else => &[_][]const u8{
"-lm",
"-lpthread",
"-lc",
"-ldl",
"-lrt",
"-lutil",
},
},
};
}
pub fn clangMightShellOutForAssembly(target: std.Target) bool {
// Clang defaults to using the system assembler over the internal one
// when targeting a non-BSD OS.
return target.cpu.arch.isSPARC();
}
/// Each backend architecture in Clang has a different codepath which may or may not
/// support an -mcpu flag.
pub fn clangAssemblerSupportsMcpuArg(target: std.Target) bool {
return switch (target.cpu.arch) {
.arm, .armeb, .thumb, .thumbeb => true,
else => false,
};
}
pub fn needUnwindTables(target: std.Target) bool {
return target.os.tag == .windows;
}
/// TODO this was ported from stage1 but it does not take into account CPU features,
/// which can affect this value. Audit this!
pub fn largestAtomicBits(target: std.Target) u32 {
return switch (target.cpu.arch) {
.avr,
.msp430,
.spu_2,
=> 16,
.arc,
.arm,
.armeb,
.hexagon,
.m68k,
.le32,
.mips,
.mipsel,
.nvptx,
.powerpc,
.powerpcle,
.r600,
.riscv32,
.sparc,
.sparcel,
.tce,
.tcele,
.thumb,
.thumbeb,
.i386,
.xcore,
.amdil,
.hsail,
.spir,
.kalimba,
.lanai,
.shave,
.wasm32,
.renderscript32,
.csky,
.spirv32,
=> 32,
.aarch64,
.aarch64_be,
.aarch64_32,
.amdgcn,
.bpfel,
.bpfeb,
.le64,
.mips64,
.mips64el,
.nvptx64,
.powerpc64,
.powerpc64le,
.riscv64,
.sparcv9,
.s390x,
.amdil64,
.hsail64,
.spir64,
.wasm64,
.renderscript64,
.ve,
.spirv64,
=> 64,
.x86_64 => 128,
};
}
pub fn defaultAddressSpace(
target: std.Target,
context: enum {
/// Query the default address space for global constant values.
global_constant,
/// Query the default address space for global mutable values.
global_mutable,
/// Query the default address space for function-local values.
local,
/// Query the default address space for functions themselves.
function,
},
) std.builtin.AddressSpace {
_ = target;
_ = context;
return .generic;
}
pub fn llvmMachineAbi(target: std.Target) ?[:0]const u8 {
const have_float = switch (target.abi) {
.gnuilp32 => return "ilp32",
.gnueabihf, .musleabihf, .eabihf => true,
else => false,
};
switch (target.cpu.arch) {
.riscv64 => {
const featureSetHas = std.Target.riscv.featureSetHas;
if (featureSetHas(target.cpu.features, .d)) {
return "lp64d";
} else if (have_float) {
return "lp64f";
} else {
return "lp64";
}
},
.riscv32 => {
const featureSetHas = std.Target.riscv.featureSetHas;
if (featureSetHas(target.cpu.features, .d)) {
return "ilp32d";
} else if (have_float) {
return "ilp32f";
} else if (featureSetHas(target.cpu.features, .e)) {
return "ilp32e";
} else {
return "ilp32";
}
},
//TODO add ARM, Mips, and PowerPC
else => return null,
}
}
pub fn defaultFunctionAlignment(target: std.Target) u32 {
return switch (target.cpu.arch) {
.arm, .armeb => 4,
.aarch64, .aarch64_32, .aarch64_be => 4,
.sparc, .sparcel, .sparcv9 => 4,
.riscv64 => 2,
else => 1,
};
}