{ lib }: let inherit (lib.attrsets) mapAttrs; in rec { doubles = import ./doubles.nix { inherit lib; }; parse = import ./parse.nix { inherit lib; }; inspect = import ./inspect.nix { inherit lib; }; platforms = import ./platforms.nix { inherit lib; }; examples = import ./examples.nix { inherit lib; }; architectures = import ./architectures.nix { inherit lib; }; /* List of all Nix system doubles the nixpkgs flake will expose the package set for. All systems listed here must be supported by nixpkgs as `localSystem`. **Warning**: This attribute is considered experimental and is subject to change. */ flakeExposed = import ./flake-systems.nix { }; # Elaborate a `localSystem` or `crossSystem` so that it contains everything # necessary. # # `parsed` is inferred from args, both because there are two options with one # clearly prefered, and to prevent cycles. A simpler fixed point where the RHS # always just used `final.*` would fail on both counts. elaborate = args': let args = if lib.isString args' then { system = args'; } else args'; final = { # Prefer to parse `config` as it is strictly more informative. parsed = parse.mkSystemFromString (if args ? config then args.config else args.system); # Either of these can be losslessly-extracted from `parsed` iff parsing succeeds. system = parse.doubleFromSystem final.parsed; config = parse.tripleFromSystem final.parsed; # Determine whether we can execute binaries built for the provided platform. canExecute = platform: final.isAndroid == platform.isAndroid && parse.isCompatible final.parsed.cpu platform.parsed.cpu && final.parsed.kernel == platform.parsed.kernel; isCompatible = _: throw "2022-05-23: isCompatible has been removed in favor of canExecute, refer to the 22.11 changelog for details"; # Derived meta-data libc = /**/ if final.isDarwin then "libSystem" else if final.isMinGW then "msvcrt" else if final.isWasi then "wasilibc" else if final.isRedox then "relibc" else if final.isMusl then "musl" else if final.isUClibc then "uclibc" else if final.isAndroid then "bionic" else if final.isLinux /* default */ then "glibc" else if final.isAvr then "avrlibc" else if final.isNone then "newlib" else if final.isNetBSD then "nblibc" # TODO(@Ericson2314) think more about other operating systems else "native/impure"; # Choose what linker we wish to use by default. Someday we might also # choose the C compiler, runtime library, C++ standard library, etc. in # this way, nice and orthogonally, and deprecate `useLLVM`. But due to # the monolithic GCC build we cannot actually make those choices # independently, so we are just doing `linker` and keeping `useLLVM` for # now. linker = /**/ if final.useLLVM or false then "lld" else if final.isDarwin then "cctools" # "bfd" and "gold" both come from GNU binutils. The existance of Gold # is why we use the more obscure "bfd" and not "binutils" for this # choice. else "bfd"; extensions = rec { sharedLibrary = /**/ if final.isDarwin then ".dylib" else if final.isWindows then ".dll" else ".so"; staticLibrary = /**/ if final.isWindows then ".lib" else ".a"; library = /**/ if final.isStatic then staticLibrary else sharedLibrary; executable = /**/ if final.isWindows then ".exe" else ""; }; # Misc boolean options useAndroidPrebuilt = false; useiOSPrebuilt = false; # Output from uname uname = { # uname -s system = { linux = "Linux"; windows = "Windows"; darwin = "Darwin"; netbsd = "NetBSD"; freebsd = "FreeBSD"; openbsd = "OpenBSD"; wasi = "Wasi"; redox = "Redox"; genode = "Genode"; }.${final.parsed.kernel.name} or null; # uname -m processor = final.parsed.cpu.name; # uname -r release = null; }; isStatic = final.isWasm || final.isRedox; # Just a guess, based on `system` inherit ({ linux-kernel = args.linux-kernel or {}; gcc = args.gcc or {}; rustc = args.rust or {}; } // platforms.select final) linux-kernel gcc rustc; linuxArch = if final.isAarch32 then "arm" else if final.isAarch64 then "arm64" else if final.isx86_32 then "i386" else if final.isx86_64 then "x86_64" # linux kernel does not distinguish microblaze/microblazeel else if final.isMicroBlaze then "microblaze" else if final.isMips32 then "mips" else if final.isMips64 then "mips" # linux kernel does not distinguish mips32/mips64 else if final.isPower then "powerpc" else if final.isRiscV then "riscv" else if final.isS390 then "s390" else final.parsed.cpu.name; qemuArch = if final.isAarch32 then "arm" else if final.isx86_64 then "x86_64" else if final.isx86 then "i386" else { powerpc = "ppc"; powerpcle = "ppc"; powerpc64 = "ppc64"; powerpc64le = "ppc64le"; }.${final.parsed.cpu.name} or final.parsed.cpu.name; # Name used by UEFI for architectures. efiArch = if final.isx86_32 then "ia32" else if final.isx86_64 then "x64" else if final.isAarch32 then "arm" else if final.isAarch64 then "aa64" else final.parsed.cpu.name; darwinArch = { armv7a = "armv7"; aarch64 = "arm64"; }.${final.parsed.cpu.name} or final.parsed.cpu.name; darwinPlatform = if final.isMacOS then "macos" else if final.isiOS then "ios" else null; # The canonical name for this attribute is darwinSdkVersion, but some # platforms define the old name "sdkVer". darwinSdkVersion = final.sdkVer or (if final.isAarch64 then "11.0" else "10.12"); darwinMinVersion = final.darwinSdkVersion; darwinMinVersionVariable = if final.isMacOS then "MACOSX_DEPLOYMENT_TARGET" else if final.isiOS then "IPHONEOS_DEPLOYMENT_TARGET" else null; } // ( let selectEmulator = pkgs: let qemu-user = pkgs.qemu.override { smartcardSupport = false; spiceSupport = false; openGLSupport = false; virglSupport = false; vncSupport = false; gtkSupport = false; sdlSupport = false; pulseSupport = false; smbdSupport = false; seccompSupport = false; hostCpuTargets = [ "${final.qemuArch}-linux-user" ]; }; wine-name = "wine${toString final.parsed.cpu.bits}"; wine = (pkgs.winePackagesFor wine-name).minimal; in if final.parsed.kernel.name == pkgs.stdenv.hostPlatform.parsed.kernel.name && pkgs.stdenv.hostPlatform.canExecute final then "${pkgs.runtimeShell} -c '\"$@\"' --" else if final.isWindows then "${wine}/bin/${wine-name}" else if final.isLinux && pkgs.stdenv.hostPlatform.isLinux then "${qemu-user}/bin/qemu-${final.qemuArch}" else if final.isWasi then "${pkgs.wasmtime}/bin/wasmtime" else if final.isMmix then "${pkgs.mmixware}/bin/mmix" else null; in { emulatorAvailable = pkgs: (selectEmulator pkgs) != null; emulator = pkgs: if (final.emulatorAvailable pkgs) then selectEmulator pkgs else throw "Don't know how to run ${final.config} executables."; }) // mapAttrs (n: v: v final.parsed) inspect.predicates // mapAttrs (n: v: v final.gcc.arch or "default") architectures.predicates // args; in assert final.useAndroidPrebuilt -> final.isAndroid; assert lib.foldl (pass: { assertion, message }: if assertion final then pass else throw message) true (final.parsed.abi.assertions or []); final; }