de88969f12
Cross-compilation of anything downstream of gtk3 requires qemu (due to gobject-introspection) with --target-list=*-linux-user. Without this commit, those qemu builds will fail on a powerpc64le host due to qemu being configured with --cpu=powerpc64le instead of --cpu=ppc64le. Unfortunately the build failure message from qemu in this situation is extremely cryptic. The root cause turns out not to be the qemu expression, but rather the fact that on powerpc64le hostPlatform.uname.processor returns the gnu-name (powerpc64le) for the cpu instead of the linux-name (ppc64le) for the cpu. uname.processor on mips64el also needs adjustment -- the Linux-name is "mips64" for both big and little endian (unlike powerpc64, where the Linux-name includes a "le" suffix): ``` nix@oak:/tmp$ uname -m; lscpu | head -n2 mips64 Architecture: mips64 Byte Order: Little Endian ``` uname.processor on powerpc32 has also been adjusted.
224 lines
8.8 KiB
Nix
224 lines
8.8 KiB
Nix
{ lib }:
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let inherit (lib.attrsets) mapAttrs; in
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rec {
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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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/* 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**: This attribute is considered experimental and is subject to change.
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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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elaborate = args': let
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args = if lib.isString args' then { system = args'; }
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else args';
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final = {
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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 = 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 = _: 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 "libSystem"
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else if final.isMinGW then "msvcrt"
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else if final.isWasi then "wasilibc"
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else if final.isRedox then "relibc"
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else if final.isMusl then "musl"
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else if final.isUClibc then "uclibc"
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else if final.isAndroid then "bionic"
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else if final.isLinux /* default */ then "glibc"
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else if final.isFreeBSD then "fblibc"
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else if final.isNetBSD then "nblibc"
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else if final.isAvr then "avrlibc"
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else if final.isNone then "newlib"
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# TODO(@Ericson2314) think more about other operating systems
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else "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 "lld"
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else if final.isDarwin then "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 "bfd";
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extensions = rec {
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sharedLibrary =
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/**/ if final.isDarwin then ".dylib"
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else if final.isWindows then ".dll"
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else ".so";
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staticLibrary =
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/**/ if final.isWindows then ".lib"
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else ".a";
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library =
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/**/ if final.isStatic then staticLibrary
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else sharedLibrary;
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executable =
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/**/ if final.isWindows then ".exe"
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else "";
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};
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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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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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}.${final.parsed.kernel.name} or null;
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# uname -m
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processor =
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if final.isPower64
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then "ppc64${lib.optionalString final.isLittleEndian "le"}"
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else if final.isPower
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then "ppc${lib.optionalString final.isLittleEndian "le"}"
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else if final.isMips64
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then "mips64" # endianness is *not* included on mips64
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else final.parsed.cpu.name;
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# uname -r
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release = null;
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};
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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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linux-kernel = args.linux-kernel or {};
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gcc = args.gcc or {};
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rustc = args.rust or {};
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} // platforms.select final)
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linux-kernel gcc rustc;
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linuxArch =
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if final.isAarch32 then "arm"
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else if final.isAarch64 then "arm64"
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else if final.isx86_32 then "i386"
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else if final.isx86_64 then "x86_64"
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# linux kernel does not distinguish microblaze/microblazeel
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else if final.isMicroBlaze then "microblaze"
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else if final.isMips32 then "mips"
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else if final.isMips64 then "mips" # linux kernel does not distinguish mips32/mips64
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else if final.isPower then "powerpc"
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else if final.isRiscV then "riscv"
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else if final.isS390 then "s390"
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else final.parsed.cpu.name;
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qemuArch =
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if final.isAarch32 then "arm"
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else if final.isx86_64 then "x86_64"
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else if final.isx86 then "i386"
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else 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 "ia32"
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else if final.isx86_64 then "x64"
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else if final.isAarch32 then "arm"
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else if final.isAarch64 then "aa64"
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else final.parsed.cpu.name;
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darwinArch = {
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armv7a = "armv7";
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aarch64 = "arm64";
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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 "macos"
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else if final.isiOS then "ios"
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else 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 "MACOSX_DEPLOYMENT_TARGET"
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else if final.isiOS then "IPHONEOS_DEPLOYMENT_TARGET"
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else null;
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} // (
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let
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selectEmulator = pkgs:
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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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pulseSupport = false;
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smbdSupport = false;
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seccompSupport = 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 final.parsed.kernel.name == pkgs.stdenv.hostPlatform.parsed.kernel.name &&
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pkgs.stdenv.hostPlatform.canExecute final
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then "${pkgs.runtimeShell} -c '\"$@\"' --"
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else if final.isWindows
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then "${wine}/bin/wine${lib.optionalString (final.parsed.cpu.bits == 64) "64"}"
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else if final.isLinux && pkgs.stdenv.hostPlatform.isLinux
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then "${qemu-user}/bin/qemu-${final.qemuArch}"
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else if final.isWasi
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then "${pkgs.wasmtime}/bin/wasmtime"
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else if final.isMmix
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then "${pkgs.mmixware}/bin/mmix"
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else null;
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in {
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emulatorAvailable = pkgs: (selectEmulator pkgs) != null;
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emulator = pkgs:
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if (final.emulatorAvailable pkgs)
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then selectEmulator pkgs
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else throw "Don't know how to run ${final.config} executables.";
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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;
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in assert final.useAndroidPrebuilt -> final.isAndroid;
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assert lib.foldl
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(pass: { assertion, message }:
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if assertion final
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then pass
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else throw message)
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true
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(final.parsed.abi.assertions or []);
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final;
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}
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