2024-05-02 00:46:19 +00:00
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/*
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This file contains various functions that take a stdenv and return
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a new stdenv with different behaviour, e.g. using a different C
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compiler.
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*/
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2024-06-30 08:16:52 +00:00
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2024-05-02 00:46:19 +00:00
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{
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lib,
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pkgs,
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config,
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}:
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let
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# N.B. Keep in sync with default arg for stdenv/generic.
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defaultMkDerivationFromStdenv =
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stdenv: (import ./generic/make-derivation.nix { inherit lib config; } stdenv).mkDerivation;
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# Low level function to help with overriding `mkDerivationFromStdenv`. One
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# gives it the old stdenv arguments and a "continuation" function, and
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# underneath the final stdenv argument it yields to the continuation to do
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# whatever it wants with old `mkDerivation` (old `mkDerivationFromStdenv`
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# applied to the *new, final* stdenv) provided for convenience.
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withOldMkDerivation =
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stdenvSuperArgs: k: stdenvSelf:
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let
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mkDerivationFromStdenv-super =
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stdenvSuperArgs.mkDerivationFromStdenv or defaultMkDerivationFromStdenv;
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mkDerivationSuper = mkDerivationFromStdenv-super stdenvSelf;
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in
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k stdenvSelf mkDerivationSuper;
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# Wrap the original `mkDerivation` providing extra args to it.
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extendMkDerivationArgs =
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old: f:
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withOldMkDerivation old (
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_: mkDerivationSuper: args:
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(mkDerivationSuper args).overrideAttrs f
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);
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# Wrap the original `mkDerivation` transforming the result.
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overrideMkDerivationResult =
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old: f:
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withOldMkDerivation old (
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_: mkDerivationSuper: args:
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f (mkDerivationSuper args)
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);
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in
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rec {
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# Override the compiler in stdenv for specific packages.
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overrideCC =
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stdenv: cc:
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stdenv.override {
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allowedRequisites = null;
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cc = cc;
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};
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# Add some arbitrary packages to buildInputs for specific packages.
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# Used to override packages in stdenv like Make. Should not be used
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# for other dependencies.
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overrideInStdenv =
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stdenv: pkgs:
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stdenv.override (prev: {
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allowedRequisites = null;
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extraBuildInputs = (prev.extraBuildInputs or [ ]) ++ pkgs;
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});
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# Override the libc++ dynamic library used in the stdenv to use the one from the platform’s
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# default stdenv. This allows building packages and linking dependencies with different
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# compiler versions while still using the same libc++ implementation for compatibility.
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#
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# Note that this adapter still uses the headers from the new stdenv’s libc++. This is necessary
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# because older compilers may not be able to parse the headers from the default stdenv’s libc++.
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overrideLibcxx =
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stdenv:
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assert stdenv.cc.libcxx != null;
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assert pkgs.stdenv.cc.libcxx != null;
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# only unified libcxx / libcxxabi stdenv's are supported
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assert lib.versionAtLeast pkgs.stdenv.cc.libcxx.version "12";
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assert lib.versionAtLeast stdenv.cc.libcxx.version "12";
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let
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llvmLibcxxVersion = lib.getVersion llvmLibcxx;
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stdenvLibcxx = pkgs.stdenv.cc.libcxx;
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llvmLibcxx = stdenv.cc.libcxx;
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libcxx =
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pkgs.runCommand "${stdenvLibcxx.name}-${llvmLibcxxVersion}"
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{
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outputs = [
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"out"
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"dev"
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];
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isLLVM = true;
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}
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''
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mkdir -p "$dev/nix-support"
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ln -s '${stdenvLibcxx}' "$out"
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echo '${stdenvLibcxx}' > "$dev/nix-support/propagated-build-inputs"
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ln -s '${lib.getDev llvmLibcxx}/include' "$dev/include"
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'';
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in
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overrideCC stdenv (
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stdenv.cc.override {
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inherit libcxx;
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extraPackages = [
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pkgs.buildPackages.targetPackages."llvmPackages_${lib.versions.major llvmLibcxxVersion}".compiler-rt
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];
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}
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);
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# Override the setup script of stdenv. Useful for testing new
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# versions of the setup script without causing a rebuild of
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# everything.
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#
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# Example:
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# randomPkg = import ../bla { ...
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# stdenv = overrideSetup stdenv ../stdenv/generic/setup-latest.sh;
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# };
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overrideSetup = stdenv: setupScript: stdenv.override { inherit setupScript; };
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# Return a modified stdenv that tries to build statically linked
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# binaries.
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makeStaticBinaries =
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stdenv0:
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stdenv0.override (
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old:
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{
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mkDerivationFromStdenv = withOldMkDerivation old (
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stdenv: mkDerivationSuper: args:
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if stdenv.hostPlatform.isDarwin then
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throw "Cannot build fully static binaries on Darwin/macOS"
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else
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(mkDerivationSuper args).overrideAttrs (
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args:
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{
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NIX_CFLAGS_LINK = toString (args.NIX_CFLAGS_LINK or "") + " -static";
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}
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// lib.optionalAttrs (!(args.dontAddStaticConfigureFlags or false)) {
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configureFlags = (args.configureFlags or [ ]) ++ [
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"--disable-shared" # brrr...
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];
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cmakeFlags = (args.cmakeFlags or [ ]) ++ [ "-DCMAKE_SKIP_INSTALL_RPATH=On" ];
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}
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2024-06-30 08:16:52 +00:00
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)
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2024-05-02 00:46:19 +00:00
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);
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}
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// lib.optionalAttrs (stdenv0.hostPlatform.libc == "glibc") {
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extraBuildInputs = (old.extraBuildInputs or [ ]) ++ [ pkgs.glibc.static ];
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}
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);
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# Return a modified stdenv that builds static libraries instead of
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# shared libraries.
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makeStaticLibraries =
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stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = extendMkDerivationArgs old (
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args:
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{
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dontDisableStatic = true;
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}
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// lib.optionalAttrs (!(args.dontAddStaticConfigureFlags or false)) {
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configureFlags = (args.configureFlags or [ ]) ++ [
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"--enable-static"
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"--disable-shared"
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];
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cmakeFlags = (args.cmakeFlags or [ ]) ++ [ "-DBUILD_SHARED_LIBS:BOOL=OFF" ];
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mesonFlags = (args.mesonFlags or [ ]) ++ [ "-Ddefault_library=static" ];
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}
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);
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});
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# Best effort static binaries. Will still be linked to libSystem,
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# but more portable than Nix store binaries.
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makeStaticDarwin =
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stdenv:
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stdenv.override (old: {
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# extraBuildInputs are dropped in cross.nix, but darwin still needs them
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extraBuildInputs = [ pkgs.buildPackages.darwin.CF ];
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mkDerivationFromStdenv = withOldMkDerivation old (
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stdenv: mkDerivationSuper: args:
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(mkDerivationSuper args).overrideAttrs (prevAttrs: {
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NIX_CFLAGS_LINK =
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toString (prevAttrs.NIX_CFLAGS_LINK or "")
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+ lib.optionalString (stdenv.cc.isGNU or false) " -static-libgcc";
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nativeBuildInputs =
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(prevAttrs.nativeBuildInputs or [ ])
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++ lib.optionals stdenv.hasCC [
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(pkgs.buildPackages.makeSetupHook {
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name = "darwin-portable-libSystem-hook";
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substitutions = {
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libsystem = "${stdenv.cc.libc}/lib/libSystem.B.dylib";
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targetPrefix = stdenv.cc.bintools.targetPrefix;
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};
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} ./darwin/portable-libsystem.sh)
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];
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})
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);
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});
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# Puts all the other ones together
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makeStatic =
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stdenv:
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lib.foldl (lib.flip lib.id) stdenv (
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lib.optional stdenv.hostPlatform.isDarwin makeStaticDarwin
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2024-06-30 08:16:52 +00:00
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2024-05-02 00:46:19 +00:00
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++ [
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makeStaticLibraries
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propagateBuildInputs
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]
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2024-06-30 08:16:52 +00:00
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2024-05-02 00:46:19 +00:00
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# Apple does not provide a static version of libSystem or crt0.o
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# So we can’t build static binaries without extensive hacks.
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++ lib.optional (!stdenv.hostPlatform.isDarwin) makeStaticBinaries
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);
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2024-06-30 08:16:52 +00:00
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2024-05-02 00:46:19 +00:00
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/*
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Modify a stdenv so that all buildInputs are implicitly propagated to
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consuming derivations
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*/
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propagateBuildInputs =
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stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
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propagatedBuildInputs = (args.propagatedBuildInputs or [ ]) ++ (args.buildInputs or [ ]);
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buildInputs = [ ];
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});
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});
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2024-06-30 08:16:52 +00:00
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/*
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2024-05-02 00:46:19 +00:00
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Modify a stdenv so that the specified attributes are added to
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every derivation returned by its mkDerivation function.
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Example:
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stdenvNoOptimise =
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addAttrsToDerivation
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{ env.NIX_CFLAGS_COMPILE = "-O0"; }
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stdenv;
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*/
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addAttrsToDerivation =
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extraAttrs: stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = extendMkDerivationArgs old (_: extraAttrs);
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});
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/*
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Use the trace output to report all processed derivations with their
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license name.
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*/
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traceDrvLicenses =
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stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = overrideMkDerivationResult (
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pkg:
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let
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printDrvPath =
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val:
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let
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drvPath = builtins.unsafeDiscardStringContext pkg.drvPath;
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license = pkg.meta.license or null;
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in
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builtins.trace "@:drv:${toString drvPath}:${builtins.toString license}:@" val;
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in
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pkg
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// {
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outPath = printDrvPath pkg.outPath;
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drvPath = printDrvPath pkg.drvPath;
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}
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);
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});
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/*
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Modify a stdenv so that it produces debug builds; that is,
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binaries have debug info, and compiler optimisations are
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disabled.
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*/
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keepDebugInfo =
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stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
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dontStrip = true;
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env = (args.env or { }) // {
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NIX_CFLAGS_COMPILE = toString (args.env.NIX_CFLAGS_COMPILE or "") + " -ggdb -Og";
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};
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});
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});
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# Modify a stdenv so that it uses the Gold linker.
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useGoldLinker =
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stdenv:
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stdenv.override (old: {
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mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
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NIX_CFLAGS_LINK = toString (args.NIX_CFLAGS_LINK or "") + " -fuse-ld=gold";
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});
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});
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/*
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Copy the libstdc++ from the model stdenv to the target stdenv.
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2024-06-30 08:16:52 +00:00
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2024-05-02 00:46:19 +00:00
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TODO(@connorbaker):
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This interface provides behavior which should be revisited prior to the
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release of 24.05. For a more detailed explanation and discussion, see
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https://github.com/NixOS/nixpkgs/issues/283517.
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*/
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useLibsFrom =
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modelStdenv: targetStdenv:
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let
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ccForLibs = modelStdenv.cc.cc;
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/*
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NOTE(@connorbaker):
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This assumes targetStdenv.cc is a cc-wrapper.
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*/
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cc = targetStdenv.cc.override {
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/*
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NOTE(originally by rrbutani):
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Normally the `useCcForLibs`/`gccForLibs` mechanism is used to get a
|
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|
|
|
clang based `cc` to use `libstdc++` (from gcc).
|
2024-06-30 08:16:52 +00:00
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|
2024-05-02 00:46:19 +00:00
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|
Here we (ab)use it to use a `libstdc++` from a different `gcc` than our
|
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|
|
`cc`.
|
2024-06-30 08:16:52 +00:00
|
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|
2024-05-02 00:46:19 +00:00
|
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|
|
Note that this does not inhibit our `cc`'s lib dir from being added to
|
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|
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|
cflags/ldflags (see `cc_solib` in `cc-wrapper`) but this is okay: our
|
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|
|
`gccForLibs`'s paths should take precedence.
|
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|
|
|
*/
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|
|
useCcForLibs = true;
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|
|
|
gccForLibs = ccForLibs;
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|
|
|
|
};
|
|
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|
|
in
|
|
|
|
|
overrideCC targetStdenv cc;
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|
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|
useMoldLinker =
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|
|
stdenv:
|
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|
|
|
let
|
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|
|
|
bintools = stdenv.cc.bintools.override {
|
|
|
|
|
extraBuildCommands = ''
|
|
|
|
|
wrap ${stdenv.cc.bintools.targetPrefix}ld.mold ${../build-support/bintools-wrapper/ld-wrapper.sh} ${pkgs.mold}/bin/ld.mold
|
|
|
|
|
wrap ${stdenv.cc.bintools.targetPrefix}ld ${../build-support/bintools-wrapper/ld-wrapper.sh} ${pkgs.mold}/bin/ld.mold
|
|
|
|
|
'';
|
|
|
|
|
};
|
|
|
|
|
in
|
|
|
|
|
stdenv.override (
|
|
|
|
|
old:
|
|
|
|
|
{
|
|
|
|
|
allowedRequisites = null;
|
|
|
|
|
cc = stdenv.cc.override { inherit bintools; };
|
|
|
|
|
# gcc >12.1.0 supports '-fuse-ld=mold'
|
|
|
|
|
# the wrap ld above in bintools supports gcc <12.1.0 and shouldn't harm >12.1.0
|
|
|
|
|
# https://github.com/rui314/mold#how-to-use
|
|
|
|
|
}
|
|
|
|
|
//
|
|
|
|
|
lib.optionalAttrs
|
|
|
|
|
(stdenv.cc.isClang || (stdenv.cc.isGNU && lib.versionAtLeast stdenv.cc.version "12"))
|
|
|
|
|
{
|
|
|
|
|
mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
|
|
|
|
|
NIX_CFLAGS_LINK = toString (args.NIX_CFLAGS_LINK or "") + " -fuse-ld=mold";
|
|
|
|
|
});
|
2024-06-30 08:16:52 +00:00
|
|
|
|
}
|
|
|
|
|
);
|
|
|
|
|
|
2024-05-02 00:46:19 +00:00
|
|
|
|
/*
|
|
|
|
|
Modify a stdenv so that it builds binaries optimized specifically
|
|
|
|
|
for the machine they are built on.
|
2024-06-30 08:16:52 +00:00
|
|
|
|
|
2024-05-02 00:46:19 +00:00
|
|
|
|
WARNING: this breaks purity!
|
|
|
|
|
*/
|
|
|
|
|
impureUseNativeOptimizations =
|
|
|
|
|
stdenv:
|
|
|
|
|
stdenv.override (old: {
|
|
|
|
|
mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
|
|
|
|
|
env = (args.env or { }) // {
|
|
|
|
|
NIX_CFLAGS_COMPILE = toString (args.env.NIX_CFLAGS_COMPILE or "") + " -march=native";
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
NIX_ENFORCE_NO_NATIVE = false;
|
|
|
|
|
|
|
|
|
|
preferLocalBuild = true;
|
|
|
|
|
allowSubstitutes = false;
|
|
|
|
|
});
|
|
|
|
|
});
|
|
|
|
|
|
2024-06-30 08:16:52 +00:00
|
|
|
|
/*
|
2024-05-02 00:46:19 +00:00
|
|
|
|
Modify a stdenv so that it builds binaries with the specified list of
|
|
|
|
|
compilerFlags appended and passed to the compiler.
|
|
|
|
|
|
|
|
|
|
This example would recompile every derivation on the system with
|
|
|
|
|
-funroll-loops and -O3 passed to each gcc invocation.
|
|
|
|
|
|
|
|
|
|
Example:
|
|
|
|
|
nixpkgs.overlays = [
|
|
|
|
|
(self: super: {
|
|
|
|
|
stdenv = super.withCFlags [ "-funroll-loops" "-O3" ] super.stdenv;
|
|
|
|
|
})
|
|
|
|
|
];
|
|
|
|
|
*/
|
|
|
|
|
withCFlags =
|
|
|
|
|
compilerFlags: stdenv:
|
|
|
|
|
stdenv.override (old: {
|
|
|
|
|
mkDerivationFromStdenv = extendMkDerivationArgs old (args: {
|
|
|
|
|
env = (args.env or { }) // {
|
|
|
|
|
NIX_CFLAGS_COMPILE = toString (args.env.NIX_CFLAGS_COMPILE or "") + " ${toString compilerFlags}";
|
|
|
|
|
};
|
|
|
|
|
});
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
# Overriding the SDK changes the Darwin SDK used to build the package, which:
|
|
|
|
|
# * Ensures that the compiler and bintools have the correct Libsystem version; and
|
|
|
|
|
# * Replaces any SDK references with those in the SDK corresponding to the requested SDK version.
|
|
|
|
|
#
|
|
|
|
|
# `sdkVersion` can be any of the following:
|
|
|
|
|
# * A version string indicating the requested SDK version; or
|
|
|
|
|
# * An attrset consisting of either or both of the following fields: darwinSdkVersion and darwinMinVersion.
|
|
|
|
|
overrideSDK = import ./darwin/override-sdk.nix {
|
|
|
|
|
inherit lib extendMkDerivationArgs;
|
|
|
|
|
inherit (pkgs)
|
|
|
|
|
stdenvNoCC
|
|
|
|
|
pkgsBuildBuild
|
|
|
|
|
pkgsBuildHost
|
|
|
|
|
pkgsBuildTarget
|
|
|
|
|
pkgsHostHost
|
|
|
|
|
pkgsHostTarget
|
|
|
|
|
pkgsTargetTarget
|
|
|
|
|
;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
withDefaultHardeningFlags =
|
|
|
|
|
defaultHardeningFlags: stdenv:
|
|
|
|
|
let
|
|
|
|
|
bintools =
|
2024-06-30 08:16:52 +00:00
|
|
|
|
let
|
2024-05-02 00:46:19 +00:00
|
|
|
|
bintools' = stdenv.cc.bintools;
|
|
|
|
|
in
|
|
|
|
|
if bintools' ? override then (bintools'.override { inherit defaultHardeningFlags; }) else bintools';
|
|
|
|
|
in
|
|
|
|
|
stdenv.override (old: {
|
|
|
|
|
cc = if stdenv.cc == null then null else stdenv.cc.override { inherit bintools; };
|
|
|
|
|
allowedRequisites = lib.mapNullable (rs: rs ++ [ bintools ]) (stdenv.allowedRequisites or null);
|
|
|
|
|
});
|
|
|
|
|
}
|