267 lines
11 KiB
Nix
267 lines
11 KiB
Nix
{ 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; };
|
|
|
|
/*
|
|
Elaborated systems contain functions, which means that they don't satisfy
|
|
`==` for a lack of reflexivity.
|
|
|
|
They might *appear* to satisfy `==` reflexivity when the same exact value is
|
|
compared to itself, because object identity is used as an "optimization";
|
|
compare the value with a reconstruction of itself, e.g. with `f == a: f a`,
|
|
or perhaps calling `elaborate` twice, and one will see reflexivity fail as described.
|
|
|
|
Hence a custom equality test.
|
|
|
|
Note that this does not canonicalize the systems, so you'll want to make sure
|
|
both arguments have been `elaborate`-d.
|
|
*/
|
|
equals =
|
|
let removeFunctions = a: lib.filterAttrs (_: v: !builtins.isFunction v) a;
|
|
in a: b: removeFunctions a == removeFunctions b;
|
|
|
|
/* 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 = lib.optionalAttrs final.hasSharedLibraries {
|
|
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 final.extensions.staticLibrary
|
|
else final.extensions.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;
|
|
};
|
|
|
|
# It is important that hasSharedLibraries==false when the platform has no
|
|
# dynamic library loader. Various tools (including the gcc build system)
|
|
# have knowledge of which platforms are incapable of dynamic linking, and
|
|
# will still build on/for those platforms with --enable-shared, but simply
|
|
# omit any `.so` build products such as libgcc_s.so. When that happens,
|
|
# it causes hard-to-troubleshoot build failures.
|
|
hasSharedLibraries = with final;
|
|
(isAndroid || isGnu || isMusl # Linux (allows multiple libcs)
|
|
|| isDarwin || isSunOS || isOpenBSD || isFreeBSD || isNetBSD # BSDs
|
|
|| isCygwin || isMinGW # Windows
|
|
) && !isStatic;
|
|
|
|
# The difference between `isStatic` and `hasSharedLibraries` is mainly the
|
|
# addition of the `staticMarker` (see make-derivation.nix). Some
|
|
# platforms, like embedded machines without a libc (e.g. arm-none-eabi)
|
|
# don't support dynamic linking, but don't get the `staticMarker`.
|
|
# `pkgsStatic` sets `isStatic=true`, so `pkgsStatic.hostPlatform` always
|
|
# has the `staticMarker`.
|
|
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.isMips64n32 then "mipsn32${lib.optionalString final.isLittleEndian "el"}"
|
|
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;
|
|
pipewireSupport = false;
|
|
smbdSupport = false;
|
|
seccompSupport = false;
|
|
enableDocs = false;
|
|
hostCpuTargets = [ "${final.qemuArch}-linux-user" ];
|
|
};
|
|
wine = (pkgs.winePackagesFor "wine${toString final.parsed.cpu.bits}").minimal;
|
|
in
|
|
if 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;
|
|
}
|