mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-16 02:33:25 +00:00
4ffa52ebdf
Port of ca59a201ca ("llvmPackages_15.libcxx: use clang 15 instead of
the stdenv's compiler").
304 lines
9.9 KiB
Nix
304 lines
9.9 KiB
Nix
{ lowPrio, newScope, pkgs, lib, stdenv, cmake, ninja
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, gccForLibs, preLibcCrossHeaders
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, libxml2, python3, fetchFromGitHub, overrideCC, wrapCCWith, wrapBintoolsWith
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, buildLlvmTools # tools, but from the previous stage, for cross
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, targetLlvmLibraries # libraries, but from the next stage, for cross
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# This is the default binutils, but with *this* version of LLD rather
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# than the default LLVM verion's, if LLD is the choice. We use these for
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# the `useLLVM` bootstrapping below.
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, bootBintoolsNoLibc ?
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if stdenv.targetPlatform.linker == "lld"
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then null
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else pkgs.bintoolsNoLibc
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, bootBintools ?
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if stdenv.targetPlatform.linker == "lld"
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then null
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else pkgs.bintools
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, darwin
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}:
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let
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release_version = "15.0.0";
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candidate = ""; # empty or "rcN"
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dash-candidate = lib.optionalString (candidate != "") "-${candidate}";
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rev = "a5640968f2f7485b2aa4919f5fa68fd8f23e2d1f"; # When using a Git commit
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rev-version = "unstable-2022-26-07"; # When using a Git commit
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version = if rev != "" then rev-version else "${release_version}${dash-candidate}";
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targetConfig = stdenv.targetPlatform.config;
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monorepoSrc = fetchFromGitHub {
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owner = "llvm";
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repo = "llvm-project";
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rev = if rev != "" then rev else "llvmorg-${version}";
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sha256 = "1sh5xihdfdn2hp7ds3lkaq1bfrl4alj36gl1aidmhlw65p5rdvl7";
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};
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llvm_meta = {
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license = lib.licenses.ncsa;
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maintainers = lib.teams.llvm.members;
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# See llvm/cmake/config-ix.cmake.
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platforms =
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lib.platforms.aarch64 ++
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lib.platforms.arm ++
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lib.platforms.m68k ++
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lib.platforms.mips ++
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lib.platforms.power ++
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lib.platforms.riscv ++
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lib.platforms.s390x ++
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lib.platforms.wasi ++
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lib.platforms.x86;
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};
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tools = lib.makeExtensible (tools: let
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callPackage = newScope (tools // { inherit stdenv cmake ninja libxml2 python3 release_version version monorepoSrc buildLlvmTools; });
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mkExtraBuildCommands0 = cc: ''
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rsrc="$out/resource-root"
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mkdir "$rsrc"
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ln -s "${cc.lib}/lib/clang/${release_version}/include" "$rsrc"
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echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
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'';
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mkExtraBuildCommands = cc: mkExtraBuildCommands0 cc + ''
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ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
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ln -s "${targetLlvmLibraries.compiler-rt.out}/share" "$rsrc/share"
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'';
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bintoolsNoLibc' =
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if bootBintoolsNoLibc == null
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then tools.bintoolsNoLibc
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else bootBintoolsNoLibc;
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bintools' =
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if bootBintools == null
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then tools.bintools
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else bootBintools;
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in {
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libllvm = callPackage ./llvm {
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inherit llvm_meta;
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};
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# `llvm` historically had the binaries. When choosing an output explicitly,
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# we need to reintroduce `outputSpecified` to get the expected behavior e.g. of lib.get*
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llvm = tools.libllvm;
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libclang = callPackage ./clang {
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inherit llvm_meta;
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};
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clang-unwrapped = tools.libclang;
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llvm-manpages = lowPrio (tools.libllvm.override {
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enableManpages = true;
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python3 = pkgs.python3; # don't use python-boot
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});
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clang-manpages = lowPrio (tools.libclang.override {
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enableManpages = true;
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python3 = pkgs.python3; # don't use python-boot
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});
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# TODO: lldb/docs/index.rst:155:toctree contains reference to nonexisting document 'design/structureddataplugins'
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# lldb-manpages = lowPrio (tools.lldb.override {
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# enableManpages = true;
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# python3 = pkgs.python3; # don't use python-boot
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# });
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# pick clang appropriate for package set we are targeting
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clang =
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/**/ if stdenv.targetPlatform.useLLVM or false then tools.clangUseLLVM
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else if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU then tools.libstdcxxClang
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else tools.libcxxClang;
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libstdcxxClang = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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# libstdcxx is taken from gcc in an ad-hoc way in cc-wrapper.
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libcxx = null;
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extraPackages = [
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targetLlvmLibraries.compiler-rt
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];
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extraBuildCommands = mkExtraBuildCommands cc;
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};
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libcxxClang = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = targetLlvmLibraries.libcxx;
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extraPackages = [
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libcxx.cxxabi
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targetLlvmLibraries.compiler-rt
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];
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extraBuildCommands = mkExtraBuildCommands cc;
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};
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lld = callPackage ./lld {
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inherit llvm_meta;
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};
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lldb = callPackage ./lldb {
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inherit llvm_meta;
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inherit (darwin) libobjc bootstrap_cmds;
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inherit (darwin.apple_sdk.libs) xpc;
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inherit (darwin.apple_sdk.frameworks) Foundation Carbon Cocoa;
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};
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# Below, is the LLVM bootstrapping logic. It handles building a
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# fully LLVM toolchain from scratch. No GCC toolchain should be
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# pulled in. As a consequence, it is very quick to build different
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# targets provided by LLVM and we can also build for what GCC
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# doesn’t support like LLVM. Probably we should move to some other
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# file.
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bintools-unwrapped = callPackage ./bintools {};
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bintoolsNoLibc = wrapBintoolsWith {
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bintools = tools.bintools-unwrapped;
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libc = preLibcCrossHeaders;
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};
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bintools = wrapBintoolsWith {
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bintools = tools.bintools-unwrapped;
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};
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clangUseLLVM = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = targetLlvmLibraries.libcxx;
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bintools = bintools';
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extraPackages = [
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libcxx.cxxabi
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targetLlvmLibraries.compiler-rt
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] ++ lib.optionals (!stdenv.targetPlatform.isWasm) [
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targetLlvmLibraries.libunwind
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];
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extraBuildCommands = mkExtraBuildCommands cc;
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nixSupport.cc-cflags =
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[ "-rtlib=compiler-rt"
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"-Wno-unused-command-line-argument"
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"-B${targetLlvmLibraries.compiler-rt}/lib"
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]
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++ lib.optional (!stdenv.targetPlatform.isWasm) "--unwindlib=libunwind"
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++ lib.optional
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(!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false)
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"-lunwind"
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++ lib.optional stdenv.targetPlatform.isWasm "-fno-exceptions";
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};
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clangNoLibcxx = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = null;
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bintools = bintools';
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extraPackages = [
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targetLlvmLibraries.compiler-rt
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];
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extraBuildCommands = mkExtraBuildCommands cc;
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nixSupport.cc-cflags = [
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"-rtlib=compiler-rt"
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"-B${targetLlvmLibraries.compiler-rt}/lib"
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"-nostdlib++"
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];
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};
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clangNoLibc = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = null;
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bintools = bintoolsNoLibc';
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extraPackages = [
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targetLlvmLibraries.compiler-rt
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];
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extraBuildCommands = mkExtraBuildCommands cc;
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nixSupport.cc-cflags = [
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"-rtlib=compiler-rt"
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"-B${targetLlvmLibraries.compiler-rt}/lib"
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];
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};
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clangNoCompilerRt = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = null;
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bintools = bintoolsNoLibc';
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extraPackages = [ ];
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extraBuildCommands = mkExtraBuildCommands0 cc;
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nixSupport.cc-cflags = [ "-nostartfiles" ];
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};
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clangNoCompilerRtWithLibc = wrapCCWith rec {
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cc = tools.clang-unwrapped;
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libcxx = null;
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bintools = bintools';
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extraPackages = [ ];
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extraBuildCommands = mkExtraBuildCommands0 cc;
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};
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});
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libraries = lib.makeExtensible (libraries: let
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callPackage = newScope (libraries // buildLlvmTools // { inherit stdenv cmake ninja libxml2 python3 release_version version monorepoSrc; });
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in {
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compiler-rt-libc = callPackage ./compiler-rt {
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inherit llvm_meta;
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stdenv = if stdenv.hostPlatform.useLLVM or false
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then overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc
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else stdenv;
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};
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compiler-rt-no-libc = callPackage ./compiler-rt {
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inherit llvm_meta;
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stdenv = if stdenv.hostPlatform.useLLVM or false
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then overrideCC stdenv buildLlvmTools.clangNoCompilerRt
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else stdenv;
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};
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# N.B. condition is safe because without useLLVM both are the same.
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compiler-rt = if stdenv.hostPlatform.isAndroid
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then libraries.compiler-rt-libc
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else libraries.compiler-rt-no-libc;
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stdenv = overrideCC stdenv buildLlvmTools.clang;
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libcxxStdenv = overrideCC stdenv buildLlvmTools.libcxxClang;
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libcxxabi = let
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# CMake will "require" a compiler capable of compiling C++ programs
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# cxx-header's build does not actually use one so it doesn't really matter
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# what stdenv we use here, as long as CMake is happy.
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cxx-headers = callPackage ./libcxx {
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inherit llvm_meta;
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headersOnly = true;
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};
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# `libcxxabi` *doesn't* need a compiler with a working C++ stdlib but it
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# *does* need a relatively modern C++ compiler (see:
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# https://releases.llvm.org/15.0.0/projects/libcxx/docs/index.html#platform-and-compiler-support).
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#
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# So, we use the clang from this LLVM package set, like libc++
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# "boostrapping builds" do:
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# https://releases.llvm.org/15.0.0/projects/libcxx/docs/BuildingLibcxx.html#bootstrapping-build
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#
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# We cannot use `clangNoLibcxx` because that contains `compiler-rt` which,
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# on macOS, depends on `libcxxabi`, thus forming a cycle.
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stdenv_ = overrideCC stdenv buildLlvmTools.clangNoCompilerRtWithLibc;
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in callPackage ./libcxxabi {
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stdenv = stdenv_;
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inherit llvm_meta cxx-headers;
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};
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# Like `libcxxabi` above, `libcxx` requires a fairly modern C++ compiler,
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# so: we use the clang from this LLVM package set instead of the regular
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# stdenv's compiler.
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libcxx = callPackage ./libcxx {
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inherit llvm_meta;
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stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
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};
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libunwind = callPackage ./libunwind {
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inherit llvm_meta;
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stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
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};
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openmp = callPackage ./openmp {
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inherit llvm_meta;
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};
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});
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in { inherit tools libraries release_version; } // libraries // tools
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