2024-05-01 22:14:04 +00:00
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{ lib }:
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let
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inherit (lib)
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any
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filterAttrs
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foldl
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hasInfix
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isFunction
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isList
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isString
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mapAttrs
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optional
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optionalAttrs
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optionalString
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removeSuffix
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replaceStrings
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toUpper
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;
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inherit (lib.strings) toJSON;
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doubles = import ./doubles.nix { inherit lib; };
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parse = import ./parse.nix { inherit lib; };
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inspect = import ./inspect.nix { inherit lib; };
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platforms = import ./platforms.nix { inherit lib; };
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examples = import ./examples.nix { inherit lib; };
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architectures = import ./architectures.nix { inherit lib; };
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/**
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Elaborated systems contain functions, which means that they don't satisfy
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`==` for a lack of reflexivity.
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They might *appear* to satisfy `==` reflexivity when the same exact value is
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compared to itself, because object identity is used as an "optimization";
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compare the value with a reconstruction of itself, e.g. with `f == a: f a`,
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or perhaps calling `elaborate` twice, and one will see reflexivity fail as described.
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Hence a custom equality test.
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Note that this does not canonicalize the systems, so you'll want to make sure
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both arguments have been `elaborate`-d.
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*/
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equals =
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2024-06-30 08:16:52 +00:00
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let
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removeFunctions = a: filterAttrs (_: v: !isFunction v) a;
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in
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a: b: removeFunctions a == removeFunctions b;
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2024-05-01 22:14:04 +00:00
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/**
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List of all Nix system doubles the nixpkgs flake will expose the package set
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for. All systems listed here must be supported by nixpkgs as `localSystem`.
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:::{.warning}
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This attribute is considered experimental and is subject to change.
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:::
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*/
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flakeExposed = import ./flake-systems.nix { };
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# Elaborate a `localSystem` or `crossSystem` so that it contains everything
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# necessary.
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#
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# `parsed` is inferred from args, both because there are two options with one
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# clearly preferred, and to prevent cycles. A simpler fixed point where the RHS
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# always just used `final.*` would fail on both counts.
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2024-06-30 08:16:52 +00:00
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elaborate =
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args':
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let
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args = if isString args' then { system = args'; } else args';
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# TODO: deprecate args.rustc in favour of args.rust after 23.05 is EOL.
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rust = args.rust or args.rustc or { };
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final =
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{
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# Prefer to parse `config` as it is strictly more informative.
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parsed = parse.mkSystemFromString (if args ? config then args.config else args.system);
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# Either of these can be losslessly-extracted from `parsed` iff parsing succeeds.
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system = parse.doubleFromSystem final.parsed;
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config = parse.tripleFromSystem final.parsed;
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# Determine whether we can execute binaries built for the provided platform.
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canExecute =
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platform:
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final.isAndroid == platform.isAndroid
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&& parse.isCompatible final.parsed.cpu platform.parsed.cpu
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&& final.parsed.kernel == platform.parsed.kernel;
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isCompatible =
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_:
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throw "2022-05-23: isCompatible has been removed in favor of canExecute, refer to the 22.11 changelog for details";
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# Derived meta-data
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libc =
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if final.isDarwin then
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"libSystem"
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else if final.isMinGW then
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"msvcrt"
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else if final.isWasi then
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"wasilibc"
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else if final.isRedox then
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"relibc"
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else if final.isMusl then
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"musl"
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else if final.isUClibc then
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"uclibc"
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else if final.isAndroid then
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"bionic"
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else if
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final.isLinux # default
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then
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"glibc"
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else if final.isFreeBSD then
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"fblibc"
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else if final.isNetBSD then
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"nblibc"
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else if final.isAvr then
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"avrlibc"
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else if final.isGhcjs then
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null
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else if final.isNone then
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"newlib"
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# TODO(@Ericson2314) think more about other operating systems
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else
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"native/impure";
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# Choose what linker we wish to use by default. Someday we might also
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# choose the C compiler, runtime library, C++ standard library, etc. in
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# this way, nice and orthogonally, and deprecate `useLLVM`. But due to
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# the monolithic GCC build we cannot actually make those choices
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# independently, so we are just doing `linker` and keeping `useLLVM` for
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# now.
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linker =
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if final.useLLVM or false then
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"lld"
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else if final.isDarwin then
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"cctools"
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# "bfd" and "gold" both come from GNU binutils. The existence of Gold
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# is why we use the more obscure "bfd" and not "binutils" for this
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# choice.
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else
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"bfd";
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# The standard lib directory name that non-nixpkgs binaries distributed
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# for this platform normally assume.
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libDir =
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if final.isLinux then
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if final.isx86_64 || final.isMips64 || final.isPower64 then "lib64" else "lib"
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else
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null;
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extensions =
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optionalAttrs final.hasSharedLibraries {
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sharedLibrary =
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if final.isDarwin then
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".dylib"
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else if final.isWindows then
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".dll"
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else
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".so";
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}
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// {
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staticLibrary = if final.isWindows then ".lib" else ".a";
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library = if final.isStatic then final.extensions.staticLibrary else final.extensions.sharedLibrary;
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executable = if final.isWindows then ".exe" else "";
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2024-05-01 22:14:04 +00:00
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};
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2024-06-30 08:16:52 +00:00
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# Misc boolean options
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useAndroidPrebuilt = false;
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useiOSPrebuilt = false;
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# Output from uname
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uname = {
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# uname -s
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system =
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{
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linux = "Linux";
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windows = "Windows";
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darwin = "Darwin";
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netbsd = "NetBSD";
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freebsd = "FreeBSD";
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openbsd = "OpenBSD";
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wasi = "Wasi";
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redox = "Redox";
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genode = "Genode";
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}
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.${final.parsed.kernel.name} or null;
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# uname -m
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processor =
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if final.isPower64 then
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"ppc64${optionalString final.isLittleEndian "le"}"
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else if final.isPower then
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"ppc${optionalString final.isLittleEndian "le"}"
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else if final.isMips64 then
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"mips64" # endianness is *not* included on mips64
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else
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final.parsed.cpu.name;
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# uname -r
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release = null;
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};
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# It is important that hasSharedLibraries==false when the platform has no
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# dynamic library loader. Various tools (including the gcc build system)
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# have knowledge of which platforms are incapable of dynamic linking, and
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# will still build on/for those platforms with --enable-shared, but simply
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# omit any `.so` build products such as libgcc_s.so. When that happens,
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# it causes hard-to-troubleshoot build failures.
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hasSharedLibraries =
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with final;
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(
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isAndroid
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|| isGnu
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|| isMusl # Linux (allows multiple libcs)
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|| isDarwin
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|| isSunOS
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|| isOpenBSD
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|| isFreeBSD
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|| isNetBSD # BSDs
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|| isCygwin
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|| isMinGW # Windows
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)
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&& !isStatic;
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# The difference between `isStatic` and `hasSharedLibraries` is mainly the
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# addition of the `staticMarker` (see make-derivation.nix). Some
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# platforms, like embedded machines without a libc (e.g. arm-none-eabi)
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# don't support dynamic linking, but don't get the `staticMarker`.
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# `pkgsStatic` sets `isStatic=true`, so `pkgsStatic.hostPlatform` always
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# has the `staticMarker`.
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isStatic = final.isWasm || final.isRedox;
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# Just a guess, based on `system`
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inherit
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(
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{
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linux-kernel = args.linux-kernel or { };
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gcc = args.gcc or { };
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}
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// platforms.select final
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)
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linux-kernel
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gcc
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;
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# TODO: remove after 23.05 is EOL, with an error pointing to the rust.* attrs.
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rustc = args.rustc or { };
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linuxArch =
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if final.isAarch32 then
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"arm"
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else if final.isAarch64 then
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"arm64"
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else if final.isx86_32 then
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"i386"
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else if final.isx86_64 then
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"x86_64"
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# linux kernel does not distinguish microblaze/microblazeel
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else if final.isMicroBlaze then
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"microblaze"
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else if final.isMips32 then
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"mips"
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else if final.isMips64 then
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"mips" # linux kernel does not distinguish mips32/mips64
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else if final.isPower then
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"powerpc"
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else if final.isRiscV then
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"riscv"
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else if final.isS390 then
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"s390"
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else if final.isLoongArch64 then
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"loongarch"
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else
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final.parsed.cpu.name;
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# https://source.denx.de/u-boot/u-boot/-/blob/9bfb567e5f1bfe7de8eb41f8c6d00f49d2b9a426/common/image.c#L81-106
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ubootArch =
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if final.isx86_32 then
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"x86" # not i386
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else if final.isMips64 then
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"mips64" # uboot *does* distinguish between mips32/mips64
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else
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final.linuxArch; # other cases appear to agree with linuxArch
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qemuArch =
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if final.isAarch32 then
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"arm"
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else if final.isS390 && !final.isS390x then
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null
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else if final.isx86_64 then
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"x86_64"
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else if final.isx86 then
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"i386"
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else if final.isMips64n32 then
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"mipsn32${optionalString final.isLittleEndian "el"}"
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else if final.isMips64 then
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"mips64${optionalString final.isLittleEndian "el"}"
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else
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final.uname.processor;
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# Name used by UEFI for architectures.
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efiArch =
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if final.isx86_32 then
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"ia32"
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else if final.isx86_64 then
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"x64"
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else if final.isAarch32 then
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"arm"
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else if final.isAarch64 then
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"aa64"
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else
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final.parsed.cpu.name;
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darwinArch =
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{
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armv7a = "armv7";
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aarch64 = "arm64";
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}
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.${final.parsed.cpu.name} or final.parsed.cpu.name;
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darwinPlatform =
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if final.isMacOS then
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"macos"
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else if final.isiOS then
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"ios"
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else
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null;
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# The canonical name for this attribute is darwinSdkVersion, but some
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# platforms define the old name "sdkVer".
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darwinSdkVersion = final.sdkVer or (if final.isAarch64 then "11.0" else "10.12");
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darwinMinVersion = final.darwinSdkVersion;
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darwinMinVersionVariable =
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if final.isMacOS then
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"MACOSX_DEPLOYMENT_TARGET"
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else if final.isiOS then
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"IPHONEOS_DEPLOYMENT_TARGET"
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else
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null;
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}
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// (
|
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|
let
|
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|
selectEmulator =
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pkgs:
|
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|
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|
let
|
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|
|
|
qemu-user = pkgs.qemu.override {
|
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|
smartcardSupport = false;
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|
|
spiceSupport = false;
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|
openGLSupport = false;
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|
virglSupport = false;
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vncSupport = false;
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|
gtkSupport = false;
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|
sdlSupport = false;
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|
alsaSupport = false;
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pulseSupport = false;
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pipewireSupport = false;
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|
jackSupport = false;
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smbdSupport = false;
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seccompSupport = false;
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tpmSupport = false;
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capstoneSupport = false;
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enableDocs = false;
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hostCpuTargets = [ "${final.qemuArch}-linux-user" ];
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|
};
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wine = (pkgs.winePackagesFor "wine${toString final.parsed.cpu.bits}").minimal;
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in
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if pkgs.stdenv.hostPlatform.canExecute final then
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"${pkgs.runtimeShell} -c '\"$@\"' --"
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else if final.isWindows then
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"${wine}/bin/wine${optionalString (final.parsed.cpu.bits == 64) "64"}"
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|
|
else if final.isLinux && pkgs.stdenv.hostPlatform.isLinux && final.qemuArch != null then
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|
"${qemu-user}/bin/qemu-${final.qemuArch}"
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|
else if final.isWasi then
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|
"${pkgs.wasmtime}/bin/wasmtime"
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|
else if final.isMmix then
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"${pkgs.mmixware}/bin/mmix"
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else
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null;
|
2024-05-01 22:14:04 +00:00
|
|
|
in
|
2024-06-30 08:16:52 +00:00
|
|
|
{
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|
|
emulatorAvailable = pkgs: (selectEmulator pkgs) != null;
|
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|
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|
emulator =
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|
|
pkgs:
|
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|
|
|
if (final.emulatorAvailable pkgs) then
|
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|
|
|
selectEmulator pkgs
|
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|
|
|
else
|
|
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|
|
throw "Don't know how to run ${final.config} executables.";
|
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|
|
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|
|
|
|
}
|
|
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|
|
)
|
|
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|
|
// mapAttrs (n: v: v final.parsed) inspect.predicates
|
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|
|
// mapAttrs (n: v: v final.gcc.arch or "default") architectures.predicates
|
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|
|
// args
|
|
|
|
|
// {
|
|
|
|
|
rust = rust // {
|
|
|
|
|
# Once args.rustc.platform.target-family is deprecated and
|
|
|
|
|
# removed, there will no longer be any need to modify any
|
|
|
|
|
# values from args.rust.platform, so we can drop all the
|
|
|
|
|
# "args ? rust" etc. checks, and merge args.rust.platform in
|
|
|
|
|
# /after/.
|
|
|
|
|
platform = rust.platform or { } // {
|
|
|
|
|
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_arch
|
|
|
|
|
arch =
|
|
|
|
|
if rust ? platform then
|
|
|
|
|
rust.platform.arch
|
|
|
|
|
else if final.isAarch32 then
|
|
|
|
|
"arm"
|
|
|
|
|
else if final.isMips64 then
|
|
|
|
|
"mips64" # never add "el" suffix
|
|
|
|
|
else if final.isPower64 then
|
|
|
|
|
"powerpc64" # never add "le" suffix
|
|
|
|
|
else
|
|
|
|
|
final.parsed.cpu.name;
|
|
|
|
|
|
|
|
|
|
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_os
|
|
|
|
|
os =
|
|
|
|
|
if rust ? platform then
|
|
|
|
|
rust.platform.os or "none"
|
|
|
|
|
else if final.isDarwin then
|
|
|
|
|
"macos"
|
|
|
|
|
else
|
|
|
|
|
final.parsed.kernel.name;
|
|
|
|
|
|
|
|
|
|
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_family
|
|
|
|
|
target-family =
|
|
|
|
|
if args ? rust.platform.target-family then
|
|
|
|
|
args.rust.platform.target-family
|
|
|
|
|
else if args ? rustc.platform.target-family then
|
|
|
|
|
(
|
|
|
|
|
# Since https://github.com/rust-lang/rust/pull/84072
|
|
|
|
|
# `target-family` is a list instead of single value.
|
|
|
|
|
let
|
|
|
|
|
f = args.rustc.platform.target-family;
|
|
|
|
|
in
|
2024-05-01 22:14:04 +00:00
|
|
|
if isList f then f else [ f ]
|
2024-06-30 08:16:52 +00:00
|
|
|
)
|
|
|
|
|
else
|
|
|
|
|
optional final.isUnix "unix" ++ optional final.isWindows "windows";
|
|
|
|
|
|
|
|
|
|
# https://doc.rust-lang.org/reference/conditional-compilation.html#target_vendor
|
|
|
|
|
vendor =
|
|
|
|
|
let
|
|
|
|
|
inherit (final.parsed) vendor;
|
|
|
|
|
in
|
|
|
|
|
rust.platform.vendor or {
|
|
|
|
|
"w64" = "pc";
|
|
|
|
|
}
|
|
|
|
|
.${vendor.name} or vendor.name;
|
|
|
|
|
};
|
2024-05-01 22:14:04 +00:00
|
|
|
|
2024-06-30 08:16:52 +00:00
|
|
|
# The name of the rust target, even if it is custom. Adjustments are
|
|
|
|
|
# because rust has slightly different naming conventions than we do.
|
|
|
|
|
rustcTarget =
|
|
|
|
|
let
|
|
|
|
|
inherit (final.parsed) cpu kernel abi;
|
|
|
|
|
cpu_ =
|
|
|
|
|
rust.platform.arch or {
|
|
|
|
|
"armv7a" = "armv7";
|
|
|
|
|
"armv7l" = "armv7";
|
|
|
|
|
"armv6l" = "arm";
|
|
|
|
|
"armv5tel" = "armv5te";
|
|
|
|
|
"riscv64" = "riscv64gc";
|
|
|
|
|
}
|
|
|
|
|
.${cpu.name} or cpu.name;
|
|
|
|
|
vendor_ = final.rust.platform.vendor;
|
|
|
|
|
in
|
|
|
|
|
# TODO: deprecate args.rustc in favour of args.rust after 23.05 is EOL.
|
|
|
|
|
args.rust.rustcTarget or args.rustc.config
|
|
|
|
|
or "${cpu_}-${vendor_}-${kernel.name}${optionalString (abi.name != "unknown") "-${abi.name}"}";
|
|
|
|
|
|
|
|
|
|
# The name of the rust target if it is standard, or the json file
|
|
|
|
|
# containing the custom target spec.
|
|
|
|
|
rustcTargetSpec =
|
|
|
|
|
rust.rustcTargetSpec or (
|
|
|
|
|
if rust ? platform then
|
|
|
|
|
builtins.toFile (final.rust.rustcTarget + ".json") (toJSON rust.platform)
|
|
|
|
|
else
|
|
|
|
|
final.rust.rustcTarget
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
# The name of the rust target if it is standard, or the
|
|
|
|
|
# basename of the file containing the custom target spec,
|
|
|
|
|
# without the .json extension.
|
|
|
|
|
#
|
|
|
|
|
# This is the name used by Cargo for target subdirectories.
|
|
|
|
|
cargoShortTarget = removeSuffix ".json" (baseNameOf "${final.rust.rustcTargetSpec}");
|
|
|
|
|
|
|
|
|
|
# When used as part of an environment variable name, triples are
|
|
|
|
|
# uppercased and have all hyphens replaced by underscores:
|
|
|
|
|
#
|
|
|
|
|
# https://github.com/rust-lang/cargo/pull/9169
|
|
|
|
|
# https://github.com/rust-lang/cargo/issues/8285#issuecomment-634202431
|
|
|
|
|
cargoEnvVarTarget = replaceStrings [ "-" ] [ "_" ] (toUpper final.rust.cargoShortTarget);
|
|
|
|
|
|
|
|
|
|
# True if the target is no_std
|
|
|
|
|
# https://github.com/rust-lang/rust/blob/2e44c17c12cec45b6a682b1e53a04ac5b5fcc9d2/src/bootstrap/config.rs#L415-L421
|
|
|
|
|
isNoStdTarget = any (t: hasInfix t final.rust.rustcTarget) [
|
|
|
|
|
"-none"
|
|
|
|
|
"nvptx"
|
|
|
|
|
"switch"
|
|
|
|
|
"-uefi"
|
|
|
|
|
];
|
|
|
|
|
};
|
2024-05-01 22:14:04 +00:00
|
|
|
};
|
2024-06-30 08:16:52 +00:00
|
|
|
in
|
|
|
|
|
assert final.useAndroidPrebuilt -> final.isAndroid;
|
|
|
|
|
assert foldl (pass: { assertion, message }: if assertion final then pass else throw message) true (
|
|
|
|
|
final.parsed.abi.assertions or [ ]
|
|
|
|
|
);
|
2024-05-01 22:14:04 +00:00
|
|
|
final;
|
|
|
|
|
|
|
|
|
|
in
|
|
|
|
|
|
|
|
|
|
# Everything in this attrset is the public interface of the file.
|
|
|
|
|
{
|
|
|
|
|
inherit
|
|
|
|
|
architectures
|
|
|
|
|
doubles
|
|
|
|
|
elaborate
|
|
|
|
|
equals
|
|
|
|
|
examples
|
|
|
|
|
flakeExposed
|
|
|
|
|
inspect
|
|
|
|
|
parse
|
|
|
|
|
platforms
|
|
|
|
|
;
|
|
|
|
|
}
|
