117 lines
2.9 KiB
Nix
117 lines
2.9 KiB
Nix
{
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cmake,
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devExtraCmakeFlags ? [ ],
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lib,
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llvm_meta,
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monorepoSrc ? null,
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ninja,
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patches ? [ ],
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python3,
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updateAutotoolsGnuConfigScriptsHook,
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release_version,
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runCommand,
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src ? null,
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stdenv,
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version,
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clangPatches,
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}:
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let
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# This is a synthetic package which is not an official part of the llvm-project.
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# See https://github.com/NixOS/nixpkgs/pull/362384 for discussion.
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#
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# LLVM has tools that run at build time. In native builds, these are
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# built as a part of the usual build, but in cross builds they need to
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# come from buildPackages.
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#
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# In many scenarios this is a small problem because LLVM from
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# buildPackages is already available as a build; but if cross building a
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# version of LLVM which is not available (e.g. a new git commit of LLVM)
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# this results in two builds of LLVM and clang, one native and one for the
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# cross.
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#
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# Full builds of LLVM are expensive; and unnecessary in this scenario. We
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# don't need a native LLVM, only a native copy of the tools which run at
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# build time. This is only tablegen and related tooling, which are cheap
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# to build.
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pname = "llvm-tblgen";
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src' =
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if monorepoSrc != null then
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runCommand "${pname}-src-${version}" { } ''
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mkdir -p "$out"
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cp -r ${monorepoSrc}/cmake "$out"
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cp -r ${monorepoSrc}/third-party "$out"
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cp -r ${monorepoSrc}/llvm "$out"
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cp -r ${monorepoSrc}/clang "$out"
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cp -r ${monorepoSrc}/clang-tools-extra "$out"
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cp -r ${monorepoSrc}/mlir "$out"
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''
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else
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src;
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# List of tablegen targets.
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targets = [
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"clang-tblgen"
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"llvm-tblgen"
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"clang-tidy-confusable-chars-gen"
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"mlir-tblgen"
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]
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++ lib.optionals (lib.versionOlder release_version "20") [
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"clang-pseudo-gen" # Removed in LLVM 20 @ ed8f78827895050442f544edef2933a60d4a7935.
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];
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self = stdenv.mkDerivation (finalAttrs: {
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inherit pname version patches;
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src = src';
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sourceRoot = "${finalAttrs.src.name}/llvm";
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__structuredAttrs = true;
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postPatch = ''
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(
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cd ../clang
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chmod u+rwX -R .
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for p in ${toString clangPatches}
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do
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patch -p1 < $p
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done
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)
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'';
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nativeBuildInputs = [
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cmake
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ninja
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python3
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# while this is not an autotools build, it still includes a config.guess
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# this is needed until scripts are updated to not use /usr/bin/uname on FreeBSD native
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updateAutotoolsGnuConfigScriptsHook
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];
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cmakeFlags = [
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# Projects with tablegen-like tools.
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"-DLLVM_ENABLE_PROJECTS=${
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lib.concatStringsSep ";" [
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"llvm"
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"clang"
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"clang-tools-extra"
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"mlir"
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]
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}"
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]
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++ devExtraCmakeFlags;
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ninjaFlags = targets;
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inherit targets;
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installPhase = ''
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mkdir -p $out/bin
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cp "''${targets[@]/#/bin/}" $out/bin
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'';
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});
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in
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self
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