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12371a51e6
MIPS has a large space of {architecture,abi,endianness}; this commit
adds all of them to lib/systems/platforms.nix so we can be done with
it.
Currently lib/systems/inspect.nix has a single "isMips" predicate,
which is a bit ambiguous now that we will have both mips32 and mips64
support, with the latter having two ABIs. Let's add four new
predicates (isMips32, isMips64, isMips64n32, and isMips64n64) and
treat the now-ambiguous isMips as deprecated in favor of the
more-specific predicates. These predicates are used mainly for
enabling/disabling target-specific workarounds, and it is extremely
rare that a platform-specific workaround is needed, and both mips32
and mips64 need exactly the same workaround.
The separate predicates (isMips64n32 and isMips64n64) for ABI
distinctions are, unfortunately, useful. Boost's user-scheduled
threading (used by nix) does does not currently supports mips64n32,
which is a very desirable ABI on routers since they rarely have
more than 2**32 bytes of DRAM.
68 lines
2.3 KiB
Nix
68 lines
2.3 KiB
Nix
# This file chooses a sane default stdenv given the system, platform, etc.
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#
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# Rather than returning a stdenv, this returns a list of functions---one per
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# each bootstrapping stage. See `./booter.nix` for exactly what this list should
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# contain.
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{ # Args just for stdenvs' usage
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lib
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# Args to pass on to the pkgset builder, too
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, localSystem, crossSystem, config, overlays, crossOverlays ? []
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} @ args:
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let
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# The native (i.e., impure) build environment. This one uses the
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# tools installed on the system outside of the Nix environment,
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# i.e., the stuff in /bin, /usr/bin, etc. This environment should
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# be used with care, since many Nix packages will not build properly
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# with it (e.g., because they require GNU Make).
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stagesNative = import ./native args;
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# The Nix build environment.
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stagesNix = import ./nix (args // { bootStages = stagesNative; });
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stagesFreeBSD = import ./freebsd args;
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# On Linux systems, the standard build environment consists of Nix-built
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# instances glibc and the `standard' Unix tools, i.e., the Posix utilities,
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# the GNU C compiler, and so on.
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stagesLinux = import ./linux args;
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inherit (import ./darwin args) stagesDarwin;
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stagesCross = import ./cross args;
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stagesCustom = import ./custom args;
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# Select the appropriate stages for the platform `system'.
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in
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if crossSystem != localSystem || crossOverlays != [] then stagesCross
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else if config ? replaceStdenv then stagesCustom
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else { # switch
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i686-linux = stagesLinux;
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x86_64-linux = stagesLinux;
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armv5tel-linux = stagesLinux;
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armv6l-linux = stagesLinux;
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armv6m-linux = stagesLinux;
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armv7a-linux = stagesLinux;
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armv7l-linux = stagesLinux;
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armv7r-linux = stagesLinux;
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armv7m-linux = stagesLinux;
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armv8a-linux = stagesLinux;
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armv8r-linux = stagesLinux;
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armv8m-linux = stagesLinux;
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aarch64-linux = stagesLinux;
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mipsel-linux = stagesLinux;
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mips64el-linux = stagesLinux;
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powerpc-linux = /* stagesLinux */ stagesNative;
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powerpc64-linux = stagesLinux;
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powerpc64le-linux = stagesLinux;
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riscv64-linux = stagesLinux;
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x86_64-darwin = stagesDarwin;
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aarch64-darwin = stagesDarwin;
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x86_64-solaris = stagesNix;
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i686-cygwin = stagesNative;
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x86_64-cygwin = stagesNative;
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x86_64-freebsd = stagesFreeBSD;
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}.${localSystem.system} or stagesNative
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