apple-sdk: remove code for old SDKs

pkgs/by-name/ap/apple-sdk/common/fetch-sdk.nix

@@ -27,11 +27,7 @@ fetchurl {
     mv "$downloadedFile" "$renamed"
     pbzx "$renamed" | cpio -idm
 
-    # SDKs are inconsistent about whether MacOSX.sdk or MacOSX<version>.sdk is a symlink.
     src=Library/Developer/CommandLineTools/SDKs/MacOSX${lib.versions.majorMinor version}.sdk
-    if [ ! -d $src ]; then
-      src=Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
-    fi
 
     # Remove unwanted binaries, man pages, and folders from the SDK.
     rm -rf $src/usr/bin $src/usr/share $src/System/Library/Perl

pkgs/by-name/ap/apple-sdk/common/process-stubs.nix

@@ -24,7 +24,6 @@ self: super: {
     + ''
       echo "Removing the following dylibs from the libSystem reexported libraries list: ${lib.escapeShellArg (lib.concatStringsSep ", " removedDylibs)}"
       for libSystem in libSystem.B.tbd libSystem.B_asan.tbd; do
-        test ! -e usr/lib/$libSystem && continue # TODO: remove once the minimum SDK is 10.14 or newer.
         tapi stubify --filetype=tbd-v5 usr/lib/$libSystem -o usr/lib/$libSystem # tbd-v5 is a JSON-based format.
         jq --argjson libs ${lib.escapeShellArg (builtins.toJSON removedDylibs)} '
           if .libraries then

pkgs/by-name/ap/apple-sdk/common/rewrite-sdk-paths.nix

@@ -1,18 +0,0 @@
-{ lib, sdkVersion }:
-
-let
-  name = "MacOSX${lib.versions.majorMinor sdkVersion}.sdk";
-in
-self: super: {
-  # Rewrite the stubs to point to dylibs in the SDK instead of at system locations. This is needed for umbrella
-  # frameworks in older SDKs, which don’t also embed their stubs.
-  buildPhase =
-    super.buildPhase or ""
-    + ''
-      echo "Rewriting stubs to reference the SDK location in the store"
-      find . -name '*.tbd' -type f -exec sed -E \
-        -e "/^install-name/n; s|( \\|'\\|\"\\|\\[)/usr/|\1$sdkpath/${name}/usr/|g" \
-        -e "/^install-name/n; s|( \\|'\\|\"\\|\\[)/System/|\1$sdkpath/${name}/System/|g" \
-        -i {} \;
-    '';
-}

pkgs/by-name/ap/apple-sdk/package.nix

@@ -9,12 +9,8 @@ in
   substitute,
 
   # Specifies the major version used for the SDK. Uses `hostPlatform.darwinSdkVersion` by default.
-  darwinSdkMajorVersion ? (
-    if lib.versionOlder stdenv.hostPlatform.darwinSdkVersion "11" then
-      lib.versions.majorMinor stdenv.hostPlatform.darwinSdkVersion
-    else
-      lib.versions.major stdenv.hostPlatform.darwinSdkVersion
-  ),
+  darwinSdkMajorVersion ? lib.versions.major stdenv.hostPlatform.darwinSdkVersion,
+
   # Enabling bootstrap disables propagation. Defaults to `false` (meaning to propagate certain packages and `xcrun`)
   # except in stage0 of the Darwin stdenv bootstrap.
   enableBootstrap ? stdenv.name == "bootstrap-stage0-stdenv-darwin",
@@ -48,11 +44,6 @@ let
       (callPackage ./common/propagate-inputs.nix { })
       (callPackage ./common/propagate-xcrun.nix { })
     ]
-    # Older SDKs do not include the libraries re-exported from umbrella frameworks in the umbrellas’ stubs, which causes
-    # link failures for those libraries unless their paths have been rewritten to point to the store.
-    ++ lib.optionals (lib.versionOlder sdkVersion "11.0") [
-      (callPackage ./common/rewrite-sdk-paths.nix { inherit sdkVersion; })
-    ]
     # This has to happen last.
     ++ [
       (callPackage ./common/run-build-phase-hooks.nix { })
@@ -97,9 +88,7 @@ stdenvNoCC.mkDerivation (
         mkdir -p "$sdkpath"
 
         cp -rd . "$sdkpath/${sdkName}"
-        ${lib.optionalString (lib.versionAtLeast finalAttrs.version "11.0") ''
-          ln -s "${sdkName}" "$sdkpath/MacOSX${sdkMajor}.sdk"
-        ''}
+        ln -s "${sdkName}" "$sdkpath/MacOSX${sdkMajor}.sdk"
         ln -s "${sdkName}" "$sdkpath/MacOSX.sdk"
 
         runHook postInstall
@@ -116,9 +105,7 @@ stdenvNoCC.mkDerivation (
       homepage = "https://developer.apple.com";
       maintainers = lib.teams.darwin.members;
       platforms = lib.platforms.darwin;
-      badPlatforms =
-        lib.optionals (lib.versionAtLeast sdkVersion "10.15") [ lib.systems.inspect.patterns.is32bit ]
-        ++ lib.optionals (lib.versionOlder sdkVersion "11.0") [ lib.systems.inspect.patterns.isAarch ];
+      badPlatforms = [ lib.systems.inspect.patterns.is32bit ];
     };
   })
 )