ld64: search standard library locations

This is basically harmless for the same reason as it is for Clang, and
lets us avoid doing wrapper hacks to fix things like the .NET build.

This reverts commit d5f2a38456bfc6696636eff9d726058f218aba70.

pkgs/build-support/bintools-wrapper/add-darwin-ldflags-before.sh

@@ -85,13 +85,3 @@ mangleVarSingle DEVELOPER_DIR ${role_suffixes[@]+"${role_suffixes[@]}"}
 # Allow wrapped bintools to do something useful when no `DEVELOPER_DIR` is set, which can happen when
 # the compiler is run outside of a stdenv or intentionally in an environment with no environment variables set.
 DEVELOPER_DIR=${DEVELOPER_DIR_@suffixSalt@:-@fallback_sdk@}
-
-# Darwin looks for frameworks in the SDK located at `DEVELOPER_DIR`.
-extraBefore+=("-F$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks")
-extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib")
-
-# While the Swift wrapper should take care of this, anything that needs to link Swift auto-linked frameworks
-# also needs these paths. Note: Test and conditionally add it because the path may not exist in older SDKs.
-if [ -d "$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/swift" ]; then
-    extraBefore+=("-L$DEVELOPER_DIR/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/swift")
-fi

pkgs/by-name/ld/ld64/package.nix

@@ -128,8 +128,6 @@ stdenv.mkDerivation (finalAttrs: {
     ./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 = ''