diff options
Diffstat (limited to 'lib/systems/default.nix')
| -rw-r--r-- | lib/systems/default.nix | 106 |
1 files changed, 104 insertions, 2 deletions
diff --git a/lib/systems/default.nix b/lib/systems/default.nix index 94dd52534aa..ada8c66e361 100644 --- a/lib/systems/default.nix +++ b/lib/systems/default.nix @@ -43,6 +43,10 @@ rec { elaborate = args': let args = if lib.isString args' then { system = args'; } else args'; + + # TODO: deprecate args.rustc in favour of args.rust after 23.05 is EOL. + rust = assert !(args ? rust && args ? rustc); args.rust or args.rustc or {}; + final = { # Prefer to parse `config` as it is strictly more informative. parsed = parse.mkSystemFromString (if args ? config then args.config else args.system); @@ -159,9 +163,101 @@ rec { ({ linux-kernel = args.linux-kernel or {}; gcc = args.gcc or {}; - rustc = args.rustc or {}; } // platforms.select final) - linux-kernel gcc rustc; + linux-kernel gcc; + + # TODO: remove after 23.05 is EOL, with an error pointing to the rust.* attrs. + rustc = args.rustc or {}; + + 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 + if builtins.isList f then f else [ f ] + ) + else lib.optional final.isUnix "unix" + ++ lib.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"; + }.${vendor.name} or vendor.name; + }; + + # The name of the rust target, even if it is custom. Adjustments are + # because rust has slightly different naming conventions than we do. + rustcTarget = let + inherit (final.parsed) cpu kernel abi; + cpu_ = rust.platform.arch or { + "armv7a" = "armv7"; + "armv7l" = "armv7"; + "armv6l" = "arm"; + "armv5tel" = "armv5te"; + "riscv64" = "riscv64gc"; + }.${cpu.name} or cpu.name; + vendor_ = final.rust.platform.vendor; + in rust.config + or "${cpu_}-${vendor_}-${kernel.name}${lib.optionalString (abi.name != "unknown") "-${abi.name}"}"; + + # The name of the rust target if it is standard, or the json file + # containing the custom target spec. + rustcTargetSpec = + /**/ if rust ? platform + then builtins.toFile (final.rust.rustcTarget + ".json") (builtins.toJSON rust.platform) + else final.rust.rustcTarget; + + # The name of the rust target if it is standard, or the + # basename of the file containing the custom target spec, + # without the .json extension. + # + # This is the name used by Cargo for target subdirectories. + cargoShortTarget = + lib.removeSuffix ".json" (baseNameOf "${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 = + lib.strings.replaceStrings ["-"] ["_"] + (lib.strings.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 = + builtins.any (t: lib.hasInfix t final.rust.rustcTarget) ["-none" "nvptx" "switch" "-uefi"]; + }; linuxArch = if final.isAarch32 then "arm" @@ -178,6 +274,12 @@ rec { else if final.isLoongArch64 then "loongarch" else final.parsed.cpu.name; + # https://source.denx.de/u-boot/u-boot/-/blob/9bfb567e5f1bfe7de8eb41f8c6d00f49d2b9a426/common/image.c#L81-106 + ubootArch = + if final.isx86_32 then "x86" # not i386 + else if final.isMips64 then "mips64" # uboot *does* distinguish between mips32/mips64 + else final.linuxArch; # other cases appear to agree with linuxArch + qemuArch = if final.isAarch32 then "arm" else if final.isS390 && !final.isS390x then null |