mirror of
https://github.com/NixOS/nixpkgs
synced 2024-10-19 01:00:20 -04:00
e0464e4788
In preparation for the deprecation of `stdenv.isX`. These shorthands are not conducive to cross-compilation because they hide the platforms. Darwin might get cross-compilation for which the continued usage of `stdenv.isDarwin` will get in the way One example of why this is bad and especially affects compiler packages https://www.github.com/NixOS/nixpkgs/pull/343059 There are too many files to go through manually but a treewide should get users thinking when they see a `hostPlatform.isX` in a place where it doesn't make sense. ``` fd --type f "\.nix" | xargs sd --fixed-strings "stdenv.is" "stdenv.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "stdenv'.is" "stdenv'.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "clangStdenv.is" "clangStdenv.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "gccStdenv.is" "gccStdenv.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "stdenvNoCC.is" "stdenvNoCC.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "inherit (stdenv) is" "inherit (stdenv.hostPlatform) is" fd --type f "\.nix" | xargs sd --fixed-strings "buildStdenv.is" "buildStdenv.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "effectiveStdenv.is" "effectiveStdenv.hostPlatform.is" fd --type f "\.nix" | xargs sd --fixed-strings "originalStdenv.is" "originalStdenv.hostPlatform.is" ```
57 lines
1.6 KiB
Nix
57 lines
1.6 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) optionalString mkOption types mkIf mkDefault;
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cfg = config.environment.stub-ld;
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message = ''
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NixOS cannot run dynamically linked executables intended for generic
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linux environments out of the box. For more information, see:
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https://nix.dev/permalink/stub-ld
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'';
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stub-ld-for = pkgsArg: messageArg: pkgsArg.pkgsStatic.runCommandCC "stub-ld" {
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nativeBuildInputs = [ pkgsArg.unixtools.xxd ];
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inherit messageArg;
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} ''
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printf "%s" "$messageArg" | xxd -i -n message >main.c
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cat <<EOF >>main.c
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#include <stdio.h>
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int main(int argc, char * argv[]) {
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fprintf(stderr, "Could not start dynamically linked executable: %s\n", argv[0]);
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fwrite(message, sizeof(unsigned char), message_len, stderr);
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return 127; // matches behavior of bash and zsh without a loader. fish uses 139
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}
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EOF
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$CC -Os main.c -o $out
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'';
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pkgs32 = pkgs.pkgsi686Linux;
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stub-ld = stub-ld-for pkgs message;
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stub-ld32 = stub-ld-for pkgs32 message;
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in {
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options = {
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environment.stub-ld = {
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enable = mkOption {
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type = types.bool;
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default = true;
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example = false;
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description = ''
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Install a stub ELF loader to print an informative error message
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in the event that a user attempts to run an ELF binary not
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compiled for NixOS.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment.ldso = mkDefault stub-ld;
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environment.ldso32 = mkIf pkgs.stdenv.hostPlatform.isx86_64 (mkDefault stub-ld32);
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};
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meta.maintainers = with lib.maintainers; [ tejing ];
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}
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