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wip-emulat
Author | SHA1 | Date | |
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282ef0f8d3 | |||
45578b2f00 |
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@ -66,6 +66,44 @@ let
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inherit (emulated) stdenv;
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inherit (emulated) stdenv;
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};
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};
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emulated = mkEmulated final prev;
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emulated = mkEmulated final prev;
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emulateBuilder = pkg: let
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# create a derivation would could be realized by the host system -- only.
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binfmtDeriv = pkg.override {
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inherit (emulated) stdenv;
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};
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# fix up the nixpkgs command that runs a Linux OS inside QEMU:
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# qemu_kvm doesn't support x86_64 -> aarch64; but full qemu package does.
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qemuCommandLinux = lib.replaceStrings
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[ "${final.buildPackages.qemu_kvm}" ]
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[ "${final.buildPackages.qemu}"]
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final.vmTools.qemuCommandLinux;
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in
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# to use binfmt emulation, just return the derivation with emulated stdenv as usual:
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# binfmtDeriv
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#
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# without binfmt emulation, leverage the `vmTools.runInLinuxVM` infrastructure:
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# final.vmTools.runInLinuxVM pkg
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#
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# except `runInLinuxVM` doesn't seem to support cross compilation (what's its purpose, then?)
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# so hack its components into something which *does* handle cross compilation
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lib.overrideDerivation binfmtDeriv ({ builder, args, ... }: {
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builder = "${final.buildPackages.bash}/bin/sh";
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args = ["-e" (final.vmTools.vmRunCommand qemuCommandLinux)];
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# orig{Builder,Args} gets used by the vmRunCommand script:
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origBuilder = builder;
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origArgs = args;
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QEMU_OPTS = "-m 4096"; # MiB of RAM
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enableParallelBuilding = true;
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# finally, let nix know that this package should be built by the build system
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system = final.stdenv.buildPlatform.system;
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})
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# alternatively, `proot` could let us get per-package binfmt:
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# - <https://proot-me.github.io/>
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# - i.e., execute host programs *and* build programs, mixed
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;
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in {
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in {
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inherit emulated;
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inherit emulated;
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@ -164,18 +202,14 @@ in {
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# # configure: error: ifconfig or ip not found, install net-tools or iproute2
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# # configure: error: ifconfig or ip not found, install net-tools or iproute2
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# nativeBuildInputs = orig.nativeBuildInputs ++ [ final.iproute2 ];
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# nativeBuildInputs = orig.nativeBuildInputs ++ [ final.iproute2 ];
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# });
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# });
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bonsai = prev.bonsai.override {
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bonsai = emulateBuilder (prev.bonsai.override {
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inherit (emulated) stdenv;
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hare = emulateBuilder (final.hare.override {
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hare = final.hare.override {
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qbe = emulateBuilder final.qbe;
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inherit (emulated) stdenv;
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harePackages.harec = emulateBuilder (final.harePackages.harec.override {
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# inherit (emulated) stdenv harePackages qbe;
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qbe = emulateBuilder final.qbe;
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qbe = useEmulatedStdenv final.qbe;
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});
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harePackages.harec = final.harePackages.harec.override {
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});
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inherit (emulated) stdenv;
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});
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qbe = useEmulatedStdenv final.qbe;
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};
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};
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};
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# bonsai = prev.bonsai.override {
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# bonsai = prev.bonsai.override {
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# inherit (emulated) stdenv hare;
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# inherit (emulated) stdenv hare;
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# };
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# };
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