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# Create a cctools-compatible bintools that uses equivalent tools from LLVM in place of the ones
# from cctools when possible.
{ lib, stdenv, makeWrapper, cctools-port, llvmPackages, enableManpages ? true }:
let
cctoolsVersion = lib.getVersion cctools-port;
llvmVersion = llvmPackages.release_version;
# `bitcode_strip` is not available until LLVM 12.
useLLVMBitcodeStrip = lib.versionAtLeast llvmVersion "12";
# A compatible implementation of `otool` was not added until LLVM 13.
useLLVMOtool = lib.versionAtLeast llvmVersion "13";
# Older versions of `strip` cause problems for the version of `codesign_allocate` available in
# the version of cctools in nixpkgs. The version of `codesign_allocate` in cctools-1005.2 does
# not appear to have issues, but the source is not available yet (as of June 2023).
useLLVMStrip = lib.versionAtLeast llvmVersion "15" || lib.versionAtLeast cctoolsVersion "1005.2";
llvm_bins = [
"dwarfdump"
"nm"
"objdump"
"size"
"strings"
]
++ lib.optional useLLVMBitcodeStrip "bitcode-strip"
++ lib.optional useLLVMOtool "otool"
++ lib.optional useLLVMStrip "strip";
# Only include the tools that LLVM doesn’t provide and that are present normally on Darwin.
# The only exceptions are the following tools, which should be reevaluated when LLVM is bumped.
# - install_name_tool (llvm-objcopy): unrecognized linker commands when building open source CF;
# - libtool (llvm-libtool-darwin): not fully compatible when used with xcbuild; and
# - lipo (llvm-lipo): crashes when running the LLVM test suite.
cctools_bins = [
"cmpdylib"
"codesign_allocate"
"ctf_insert"
"install_name_tool"
"ld"
"libtool"
"lipo"
"nmedit"
"pagestuff"
"ranlib"
"segedit"
"vtool"
]
++ lib.optional (!useLLVMBitcodeStrip) "bitcode_strip"
++ lib.optional (!useLLVMOtool) "otool"
++ lib.optional (!useLLVMStrip) "strip";
inherit (stdenv.cc) targetPrefix;
linkManPages = pkg: source: target: lib.optionalString enableManpages ''
sourcePath=${pkg}/share/man/man1/${source}.1.gz
targetPath=$man/share/man/man1/${target}.1.gz
if [ -f "$sourcePath" ]; then
mkdir -p "$(dirname "$targetPath")"
ln -s "$sourcePath" "$targetPath"
fi
'';
in
stdenv.mkDerivation {
pname = "cctools-llvm";
version = "${llvmVersion}-${cctoolsVersion}";
nativeBuildInputs = [ makeWrapper ];
# The `man` output has to be included unconditionally because darwin.binutils expects it.
outputs = [ "out" "dev" "man" ];
buildCommand = ''
mkdir -p "$out/bin" "$man"
ln -s ${lib.getDev cctools-port} "$dev"
# Use the clang-integrated assembler instead of using `as` from cctools.
makeWrapper "${lib.getBin llvmPackages.clang-unwrapped}/bin/clang" "$out/bin/${targetPrefix}as" \
--add-flags "-x assembler -integrated-as -c"
ln -s "${lib.getBin llvmPackages.bintools-unwrapped}/bin/llvm-ar" "$out/bin/${targetPrefix}ar"
${linkManPages llvmPackages.llvm-manpages "llvm-ar" "ar"}
for tool in ${toString llvm_bins}; do
cctoolsTool=''${tool/-/_}
ln -s "${lib.getBin llvmPackages.llvm}/bin/llvm-$tool" "$out/bin/${targetPrefix}$cctoolsTool"
${linkManPages llvmPackages.llvm-manpages "llvm-$tool" "$cctoolsTool"}
done
for tool in ${toString cctools_bins}; do
ln -s "${lib.getBin cctools-port}/bin/${targetPrefix}$tool" "$out/bin/${targetPrefix}$tool"
${linkManPages (lib.getMan cctools-port) "$tool" "$tool"}
done
${linkManPages (lib.getMan cctools-port) "ld64" "ld64"}
${lib.optionalString (!useLLVMOtool) # The actual man page for otool in cctools is llvm-otool
linkManPages (lib.getMan cctools-port) "llvm-otool" "llvm-otool"}
'';
passthru = { inherit targetPrefix; };
}
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