clang: skip the -nostdlibinc patch on Darwin; ld64: search standard library locations (#349555)
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@ -85,13 +85,3 @@ mangleVarSingle DEVELOPER_DIR ${role_suffixes[@]+"${role_suffixes[@]}"}
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# Allow wrapped bintools to do something useful when no `DEVELOPER_DIR` is set, which can happen when
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# the compiler is run outside of a stdenv or intentionally in an environment with no environment variables set.
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DEVELOPER_DIR=${DEVELOPER_DIR_@suffixSalt@:-@fallback_sdk@}
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# Darwin looks for frameworks in the SDK located at `DEVELOPER_DIR`.
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extraBefore+=("-F$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks")
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extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib")
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# While the Swift wrapper should take care of this, anything that needs to link Swift auto-linked frameworks
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# also needs these paths. Note: Test and conditionally add it because the path may not exist in older SDKs.
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if [ -d "$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/swift" ]; then
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extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/swift")
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fi
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@ -95,11 +95,6 @@ if [ "@darwinMinVersion@" ]; then
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# xcbuild needs `SDKROOT` to be the name of the SDK, which it sets in its own wrapper,
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# but compilers expect it to point to the absolute path.
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SDKROOT="$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"
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# Set up various library paths since compilers may not support (or may have disabled) finding them in the sysroot.
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NIX_CFLAGS_COMPILE_BEFORE_@suffixSalt@+=" -isysroot $SDKROOT"
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NIX_CFLAGS_COMPILE_@suffixSalt@+=" -idirafter $SDKROOT/usr/include"
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NIX_CFLAGS_COMPILE_@suffixSalt@+=" -iframework $SDKROOT/System/Library/Frameworks"
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fi
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# That way forked processes will not extend these environment variables again.
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@ -1,25 +0,0 @@
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From 3e80d438e2a3ec50d666f2b6e32007c275d4a08a Mon Sep 17 00:00:00 2001
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From: Randy Eckenrode <randy@largeandhighquality.com>
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Date: Thu, 11 Apr 2024 23:13:29 -0400
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Subject: [PATCH 8/8] Disable searching in standard library locations
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---
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src/ld/Options.cpp | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/ld/Options.cpp b/src/ld/Options.cpp
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index 67a9f53..611b583 100644
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--- a/src/ld/Options.cpp
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+++ b/src/ld/Options.cpp
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@@ -4320,7 +4320,7 @@ bool Options::shouldUseBuildVersion(ld::Platform plat, uint32_t minOSvers) const
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void Options::buildSearchPaths(int argc, const char* argv[])
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{
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- bool addStandardLibraryDirectories = true;
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+ bool addStandardLibraryDirectories = false;
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ld::Platform platform = ld::Platform::unknown;
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std::vector<const char*> libraryPaths;
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std::vector<const char*> frameworkPaths;
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--
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2.45.1
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@ -128,8 +128,6 @@ stdenv.mkDerivation (finalAttrs: {
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./0006-Add-libcd_is_blob_a_linker_signature-implementation.patch
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# Add OpenSSL implementation of CoreCrypto digest functions. Avoids use of private and non-free APIs.
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./0007-Add-OpenSSL-based-CoreCrypto-digest-functions.patch
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# ld64 will search `/usr/lib`, `/Library/Frameworks`, etc by default. Disable that.
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./0008-Disable-searching-in-standard-library-locations.patch
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];
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postPatch = ''
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@ -81,13 +81,17 @@ let
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# Make sure clang passes the correct location of libLTO to ld64
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substituteInPlace lib/Driver/ToolChains/Darwin.cpp \
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--replace-fail 'StringRef P = llvm::sys::path::parent_path(D.Dir);' 'StringRef P = "${lib.getLib libllvm}";'
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'' + (if lib.versionOlder release_version "13" then ''
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'' + (
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# See the comment on the `add-nostdlibinc-flag.patch` patch in
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# `../default.nix` for why we skip Darwin here.
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if lib.versionOlder release_version "13" && (!stdenv.hostPlatform.isDarwin || !stdenv.targetPlatform.isDarwin) then ''
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sed -i -e 's/DriverArgs.hasArg(options::OPT_nostdlibinc)/true/' \
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-e 's/Args.hasArg(options::OPT_nostdlibinc)/true/' \
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lib/Driver/ToolChains/*.cpp
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'' else ''
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(cd tools && ln -s ../../clang-tools-extra extra)
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'') + lib.optionalString stdenv.hostPlatform.isMusl ''
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''
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) + lib.optionalString stdenv.hostPlatform.isMusl ''
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sed -i -e 's/lgcc_s/lgcc_eh/' lib/Driver/ToolChains/*.cpp
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'';
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@ -529,8 +529,24 @@ let
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# mis-compilation in firefox.
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# See: https://bugzilla.mozilla.org/show_bug.cgi?id=1741454
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(metadata.getVersionFile "clang/revert-malloc-alignment-assumption.patch")
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# This patch prevents global system header directories from
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# leaking through on non‐NixOS Linux. However, on macOS, the
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# SDK path is used as the sysroot, and forcing `-nostdlibinc`
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# breaks `-isysroot` with an unwrapped compiler. As macOS has
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# no `/usr/include`, there’s essentially no risk to skipping
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# the patch there. It’s possible that Homebrew headers in
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# `/usr/local/include` might leak through to unwrapped
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# compilers being used without an SDK set or something, but
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# it hopefully shouldn’t matter.
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#
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# TODO: Figure out a better solution to this whole problem so
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# that we won’t have to choose between breaking unwrapped
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# compilers breaking libclang when we can do Linux‐to‐Darwin
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# cross‐compilation again.
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++ lib.optional (
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!args.stdenv.hostPlatform.isDarwin || !args.stdenv.targetPlatform.isDarwin
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) ./clang/add-nostdlibinc-flag.patch
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++ [
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./clang/add-nostdlibinc-flag.patch
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(substituteAll {
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src =
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if (lib.versionOlder metadata.release_version "16") then
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@ -133,6 +133,17 @@ let
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ln -s "${compiler-rt.out}/lib" "$rsrc/lib"
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ln -s "${compiler-rt.out}/share" "$rsrc/share"
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echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
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''
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+ lib.optionalString (isFromBootstrapFiles prevStage.llvmPackages.clang-unwrapped) ''
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# Work around the `-nostdlibinc` patch in the bootstrap tools.
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# TODO: Remove after the bootstrap tools have been updated.
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substituteAll ${builtins.toFile "add-flags-extra.sh" ''
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if [ "@darwinMinVersion@" ]; then
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NIX_CFLAGS_COMPILE_@suffixSalt@+=" -idirafter $SDKROOT/usr/include"
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NIX_CFLAGS_COMPILE_@suffixSalt@+=" -iframework $SDKROOT/System/Library/Frameworks"
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fi
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''} add-flags-extra.sh
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cat add-flags-extra.sh >> $out/nix-support/add-flags.sh
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'';
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cc = prevStage.llvmPackages.clang-unwrapped;
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@ -438,9 +449,15 @@ assert bootstrapTools.passthru.isFromBootstrapFiles or false; # sanity check
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bintools = selfDarwin.binutils-unwrapped;
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# Bootstrap tools cctools needs the hook and wrappers to make sure things are signed properly.
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# Bootstrap tools cctools needs the hook and wrappers to make sure things are signed properly,
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# and additional linker flags to work around a since‐removed patch.
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# This can be dropped once the bootstrap tools cctools has been updated to 1010.6.
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extraBuildCommands = ''
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printf %s ${lib.escapeShellArg ''
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extraBefore+=("-F$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks")
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extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib")
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''} >> $out/nix-support/add-local-ldflags-before.sh
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echo 'source ${selfDarwin.postLinkSignHook}' >> $out/nix-support/post-link-hook
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export signingUtils=${selfDarwin.signingUtils}
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@ -683,6 +700,11 @@ assert bootstrapTools.passthru.isFromBootstrapFiles or false; # sanity check
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# Bootstrap tools cctools needs the hook and wrappers to make sure things are signed properly.
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# This can be dropped once the bootstrap tools cctools has been updated to 1010.6.
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extraBuildCommands = ''
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printf %s ${lib.escapeShellArg ''
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extraBefore+=("-F$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks")
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extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib")
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''} >> $out/nix-support/add-local-ldflags-before.sh
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echo 'source ${selfDarwin.postLinkSignHook}' >> $out/nix-support/post-link-hook
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export signingUtils=${selfDarwin.signingUtils}
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