tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
1{
2 lib,
3 stdenv,
4 pkgs,
5 overrideCC,
6 buildPackages,
7 targetPackages,
8 callPackage,
9 isl_0_20,
10 noSysDirs,
11 wrapCC,
12}@args:
13
14let
15 versions = import ./versions.nix;
16 gccForMajorMinorVersion =
17 majorMinorVersion:
18 let
19 majorVersion = lib.versions.major majorMinorVersion;
20 atLeast = lib.versionAtLeast majorMinorVersion;
21 attrName = "gcc${lib.replaceStrings [ "." ] [ "" ] majorMinorVersion}";
22 pkg = lib.lowPrio (
23 wrapCC (
24 callPackage ./default.nix {
25 inherit noSysDirs;
26 inherit majorMinorVersion;
27 reproducibleBuild = true;
28 profiledCompiler = false;
29 libcCross =
30 if !lib.systems.equals stdenv.targetPlatform stdenv.buildPlatform then
31 targetPackages.libc or pkgs.libc
32 else
33 null;
34 threadsCross =
35 if !lib.systems.equals stdenv.targetPlatform stdenv.buildPlatform then
36 targetPackages.threads or pkgs.threads
37 else
38 { };
39 isl = if stdenv.hostPlatform.isDarwin then null else isl_0_20;
40 # do not allow version skew when cross-building gcc
41 #
42 # When `gcc` is cross-built (`build` != `target` && `host` == `target`)
43 # `gcc` assumes that it has a compatible cross-compiler in the environment
44 # that can build target libraries. Version of a cross-compiler has to
45 # match the compiler being cross-built as libraries frequently use fresh
46 # compiler features, like `-std=c++26` or target-specific types like
47 # `_Bfloat16`.
48 # Version mismatch causes build failures like:
49 # https://github.com/NixOS/nixpkgs/issues/351905
50 #
51 # Similar problems (but on a smaller scale) happen when a `gcc`
52 # cross-compiler is built (`build` == `host` && `host` != `target`) built
53 # by a mismatching version of a native compiler (`build` == `host` &&
54 # `host` == `target`).
55 #
56 # Let's fix both problems by requiring the same compiler version for
57 # cross-case.
58 stdenv =
59 if
60 (
61 (!lib.systems.equals stdenv.targetPlatform stdenv.buildPlatform)
62 || (!lib.systems.equals stdenv.hostPlatform stdenv.targetPlatform)
63 )
64 && stdenv.cc.isGNU
65 then
66 overrideCC stdenv buildPackages."gcc${majorVersion}"
67 else
68 stdenv;
69 }
70 )
71 );
72 in
73 lib.nameValuePair attrName pkg;
74in
75lib.listToAttrs (map gccForMajorMinorVersion versions.allMajorVersions)