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6e6c8b7338
The reason for this change is explained in the long comment I added.
Here's a simple example of the problem:
let
pkgs = import <nixpkgs> { crossSystem.system = "aarch64-linux"; };
in
pkgs.callPackage ({ stdenv, s6-rc }: stdenv.mkDerivation {
name = "s6-rc-compiled";
nativeBuildInputs = [ s6-rc ];
buildCommand = ''
mkdir in
s6-rc-compile $out in
'';
}) {}
We're cross compiling for aarch64 here, so we'd expect the scripts
generated by this derivation to be things we could run on aarch64.
But when I build this on my x86_64 machine, without this change
applied, $out/servicedirs/s6rc-oneshot-runner/run gets generated full
of references to x86_64 non-cross store paths for execline, s6, and
s6-rc.
With this change applied, the scripts generated by the above
expression now refer to the cross-compiled aarch64 store paths for
execline, s6, and s6-rc.
62 lines
2.3 KiB
Nix
62 lines
2.3 KiB
Nix
{ lib, stdenv, skawarePackages, targetPackages }:
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with skawarePackages;
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buildPackage {
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pname = "s6-rc";
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version = "0.5.2.2";
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sha256 = "12bzc483jpd16xmhfsfrib84daj1k3kwy5s5nc18ap60apa1r39a";
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description = "A service manager for s6-based systems";
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platforms = lib.platforms.unix;
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outputs = [ "bin" "lib" "dev" "doc" "out" ];
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configureFlags = [
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"--libdir=\${lib}/lib"
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"--libexecdir=\${lib}/libexec"
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"--dynlibdir=\${lib}/lib"
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"--bindir=\${bin}/bin"
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"--includedir=\${dev}/include"
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"--with-sysdeps=${skalibs.lib}/lib/skalibs/sysdeps"
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"--with-include=${skalibs.dev}/include"
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"--with-include=${execline.dev}/include"
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"--with-include=${s6.dev}/include"
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"--with-lib=${skalibs.lib}/lib"
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"--with-lib=${execline.lib}/lib"
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"--with-lib=${s6.out}/lib"
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"--with-dynlib=${skalibs.lib}/lib"
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"--with-dynlib=${execline.lib}/lib"
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"--with-dynlib=${s6.out}/lib"
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];
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# s6-rc-compile generates built-in service definitions containing
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# absolute paths to execline, s6, and s6-rc programs. If we're
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# running s6-rc-compile as part of a Nix derivation, and we want to
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# cross-compile that derivation, those paths will be wrong --
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# they'll be for execline, s6, and s6-rc on the platform we're
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# running s6-rc-compile on, not the platform we're targeting.
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#
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# We can detect this special case of s6-rc being used at build time
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# in a derivation that's being cross-compiled, because that's the
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# only time hostPlatform != targetPlatform. When that happens we
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# modify s6-rc-compile to use the configuration headers for the
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# system we're cross-compiling for.
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postConfigure = lib.optionalString (stdenv.hostPlatform != stdenv.targetPlatform) ''
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substituteInPlace src/s6-rc/s6-rc-compile.c \
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--replace '<execline/config.h>' '"${targetPackages.execline.dev}/include/execline/config.h"' \
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--replace '<s6/config.h>' '"${targetPackages.s6.dev}/include/s6/config.h"' \
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--replace '<s6-rc/config.h>' '"${targetPackages.s6-rc.dev}/include/s6-rc/config.h"'
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'';
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postInstall = ''
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# remove all s6 executables from build directory
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rm $(find -name "s6-rc-*" -type f -mindepth 1 -maxdepth 1 -executable)
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rm s6-rc libs6rc.*
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mv doc $doc/share/doc/s6-rc/html
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mv examples $doc/share/doc/s6-rc/examples
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'';
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}
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