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|
{ 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 preferred, 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.isFreeBSD then "fblibc"
else if final.isNetBSD then "nblibc"
else if final.isAvr then "avrlibc"
else if final.isGhcjs then null
else if final.isNone then "newlib"
# 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 existence 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";
}.${final.parsed.kernel.name} or null;
# uname -m
processor =
if final.isPower64
then "ppc64${lib.optionalString final.isLittleEndian "le"}"
else if final.isPower
then "ppc${lib.optionalString final.isLittleEndian "le"}"
else if final.isMips64
then "mips64" # endianness is *not* included on mips64
else final.parsed.cpu.name;
# uname -r
release = null;
};
isStatic = final.isWasm || final.isRedox;
# Just a guess, based on `system`
inherit
({
linux-kernel = args.linux-kernel or {};
gcc = args.gcc or {};
rustc = args.rustc or {};
} // platforms.select final)
linux-kernel gcc rustc;
linuxArch =
if final.isAarch32 then "arm"
else if final.isAarch64 then "arm64"
else if final.isx86_32 then "i386"
else if final.isx86_64 then "x86_64"
# linux kernel does not distinguish microblaze/microblazeel
else if final.isMicroBlaze then "microblaze"
else if final.isMips32 then "mips"
else if final.isMips64 then "mips" # linux kernel does not distinguish mips32/mips64
else if final.isPower then "powerpc"
else if final.isRiscV then "riscv"
else if final.isS390 then "s390"
else if final.isLoongArch64 then "loongarch"
else final.parsed.cpu.name;
qemuArch =
if final.isAarch32 then "arm"
else if final.isS390 && !final.isS390x then null
else if final.isx86_64 then "x86_64"
else if final.isx86 then "i386"
else if final.isMips64 then "mips64${lib.optionalString final.isLittleEndian "el"}"
else final.uname.processor;
# 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";
}.${final.parsed.cpu.name} or final.parsed.cpu.name;
darwinPlatform =
if final.isMacOS then "macos"
else if final.isiOS then "ios"
else null;
# The canonical name for this attribute is darwinSdkVersion, but some
# platforms define the old name "sdkVer".
darwinSdkVersion = final.sdkVer or (if final.isAarch64 then "11.0" else "10.12");
darwinMinVersion = final.darwinSdkVersion;
darwinMinVersionVariable =
if final.isMacOS then "MACOSX_DEPLOYMENT_TARGET"
else if final.isiOS then "IPHONEOS_DEPLOYMENT_TARGET"
else null;
} // (
let
selectEmulator = pkgs:
let
qemu-user = pkgs.qemu.override {
smartcardSupport = false;
spiceSupport = false;
openGLSupport = false;
virglSupport = false;
vncSupport = false;
gtkSupport = false;
sdlSupport = false;
pulseSupport = false;
smbdSupport = false;
seccompSupport = false;
enableDocs = false;
hostCpuTargets = [ "${final.qemuArch}-linux-user" ];
};
wine = (pkgs.winePackagesFor "wine${toString final.parsed.cpu.bits}").minimal;
in
if final.parsed.kernel.name == pkgs.stdenv.hostPlatform.parsed.kernel.name &&
pkgs.stdenv.hostPlatform.canExecute final
then "${pkgs.runtimeShell} -c '\"$@\"' --"
else if final.isWindows
then "${wine}/bin/wine${lib.optionalString (final.parsed.cpu.bits == 64) "64"}"
else if final.isLinux && pkgs.stdenv.hostPlatform.isLinux && final.qemuArch != null
then "${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;
}
|
