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|
{
lib,
stdenv,
fetchFromGitHub,
fetchurl,
darwin,
libtapi,
libunwind,
llvm,
meson,
ninja,
openssl,
pkg-config,
python3,
swiftPackages,
xar,
gitUpdater,
}:
let
# The targetPrefix is prepended to binary names to allow multiple binutils on the PATH to be usable.
targetPrefix = lib.optionalString (
stdenv.targetPlatform != stdenv.hostPlatform
) "${stdenv.targetPlatform.config}-";
# ld64 needs CrashReporterClient.h, which is hard to find, but WebKit2 has it.
# Fetch it directly because the Darwin stdenv bootstrap can’t depend on fetchgit.
crashreporter_h = fetchurl {
url = "https://raw.githubusercontent.com/apple-oss-distributions/WebKit2/WebKit2-7605.1.33.0.2/Platform/spi/Cocoa/CrashReporterClientSPI.h";
hash = "sha256-0ybVcwHuGEdThv0PPjYQc3SW0YVOyrM3/L9zG/l1Vtk=";
};
# First version with all the required definitions. This is used in preference to darwin.xnu to make it easier
# to support Linux and because the version of darwin.xnu available on x86_64-darwin in the 10.12 SDK is too old.
xnu = fetchFromGitHub {
name = "xnu-src";
owner = "apple-oss-distributions";
repo = "xnu";
rev = "xnu-6153.11.26";
hash = "sha256-dcnGcp7bIjQxeAn5pXt+mHSYEXb2Ad9Smhd/WUG4kb4=";
};
# Avoid pulling in all of Swift just to build libdispatch
libdispatch = swiftPackages.Dispatch.override { useSwift = false; };
in
stdenv.mkDerivation (finalAttrs: {
pname = "ld64";
version = "951.9";
outputs = [
"out"
"dev"
"lib"
];
src = fetchFromGitHub {
owner = "apple-oss-distributions";
repo = "ld64";
rev = "ld64-${finalAttrs.version}";
hash = "sha256-hLkfqgBwVPlO4gfriYOawTO5E1zSD63ZcNetm1E5I70";
};
xcodeHash = "sha256-+j7Ed/6aD46SJnr3DWPfWuYWylb2FNJRPmWsUVxZJHM=";
postUnpack = ''
unpackFile '${xnu}'
# Verify that the Xcode project has not changed unexpectedly.
hashType=$(echo $xcodeHash | cut -d- -f1)
expectedHash=$(echo $xcodeHash | cut -d- -f2)
hash=$(openssl "$hashType" -binary "$sourceRoot/ld64.xcodeproj/project.pbxproj" | base64)
if [ "$hash" != "$expectedHash" ]; then
echo 'error: hash mismatch in ld64.xcodeproj/project.pbxproj'
echo " specified: $xcodeHash"
echo " got: $hashType-$hash"
echo
echo 'Upstream Xcode project has changed. Update `meson.build` with any changes, then update `xcodeHash`.'
echo 'Use `nix-hash --flat --sri --type sha256 ld64.xcodeproj/project.pbxproj` to regenerate it.'
exit 1
fi
'';
patches = [
# Use std::atomic for atomics. Replaces private APIs (`os/lock_private.h`) with standard APIs.
./0004-Use-std-atomics-and-std-mutex.patch
# ld64 assumes the default libLTO.dylib can be found relative to its bindir, which is
# not the case in nixpkgs. Override it to default to `stdenv.cc`’s libLTO.dylib.
./0005-Support-LTO-in-nixpkgs.patch
# Add implementation of missing function required for code directory support.
./0006-Add-libcd_is_blob_a_linker_signature-implementation.patch
# Add OpenSSL implementation of CoreCrypto digest functions. Avoids use of private and non-free APIs.
./0007-Add-OpenSSL-based-CoreCrypto-digest-functions.patch
# ld64 will search `/usr/lib`, `/Library/Frameworks`, etc by default. Disable that.
./0008-Disable-searching-in-standard-library-locations.patch
];
postPatch = ''
substitute ${./meson.build} meson.build \
--subst-var version
cp ${./meson.options} meson.options
# Copy headers for certain private APIs
mkdir -p include
substitute ${crashreporter_h} include/CrashReporterClient.h \
--replace-fail 'USE(APPLE_INTERNAL_SDK)' '0'
# Copy from the source so the headers can be used on Linux and x86_64-darwin
mkdir -p include/System
for dir in arm i386 machine; do
cp -r ../xnu-src/osfmk/$dir include/System/$dir
done
mkdir -p include/sys
cp ../xnu-src/bsd/sys/commpage.h include/sys
# Match the version format used by upstream.
sed -i src/ld/Options.cpp \
-e '1iconst char ld_classicVersionString[] = "@(#)PROGRAM:ld PROJECT:ld64-${finalAttrs.version}\\n";'
# Instead of messing around with trying to extract and run the script from the Xcode project,
# just use our own Python script to generate `compile_stubs.h`
cp ${./gen_compile_stubs.py} gen_compile_stubs.py
# Enable LTO support using LLVM’s libLTO.dylib by default.
substituteInPlace src/ld/InputFiles.cpp \
--subst-var-by libllvm '${lib.getLib llvm}'
substituteInPlace src/ld/parsers/lto_file.cpp \
--subst-var-by libllvm '${lib.getLib llvm}'
# Use portable includes
substituteInPlace src/ld/code-sign-blobs/endian.h \
--replace-fail '#include <machine/endian.h>' '#include <sys/types.h>'
'';
strictDeps = true;
nativeBuildInputs = [
meson
ninja
openssl
pkg-config
python3
];
buildInputs = [
libtapi
llvm
libunwind
openssl
xar
] ++ lib.optionals stdenv.isDarwin [ darwin.dyld ] ++ lib.optionals stdenv.isLinux [ libdispatch ];
# Note for overrides: ld64 cannot be built as a debug build because of UB in its iteration implementations,
# which trigger libc++ debug assertions due to trying to take the address of the first element of an emtpy vector.
mesonBuildType = "release";
mesonFlags = [
(lib.mesonOption "b_ndebug" "if-release")
(lib.mesonOption "default_library" (if stdenv.hostPlatform.isStatic then "static" else "shared"))
] ++ lib.optionals (targetPrefix != "") [ (lib.mesonOption "target_prefix" targetPrefix) ];
doInstallCheck = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
# ld64 has a test suite, but many of the tests fail (even with ld from Xcode). Instead
# of running the test suite, rebuild ld64 using itself to link itself as a check.
# LTO is enabled only to confirm that it is set up and working properly in nixpkgs.
installCheckPhase = ''
runHook preInstallCheck
cd "$NIX_BUILD_TOP/$sourceRoot"
export NIX_CFLAGS_COMPILE+=" --ld-path=$out/bin/${targetPrefix}ld"
meson setup build-install-check -Db_lto=true --buildtype=$mesonBuildType
cd build-install-check
ninja ${targetPrefix}ld "-j$NIX_BUILD_CORES"
# Confirm that ld found the LTO library and reports it.
./${targetPrefix}ld -v 2>&1 | grep -q 'LTO support'
runHook postInstallCheck
'';
postInstall = ''
ln -s ld-classic.1 "$out/share/man/man1/ld.1"
ln -s ld.1 "$out/share/man/man1/ld64.1"
moveToOutput lib/libprunetrie.a "$dev"
'';
__structuredAttrs = true;
passthru.updateScript = gitUpdater { rev-prefix = "ld64-"; };
meta = {
description = "The classic linker for Darwin";
homepage = "https://opensource.apple.com/releases/";
license = lib.licenses.apple-psl20;
mainProgram = "ld";
maintainers = with lib.maintainers; [ reckenrode ];
platforms = lib.platforms.darwin; # Porting to other platforms is incomplete. Support only Darwin for now.
};
})
|
