[ios] Partially decouple iOS and macOS GN configuration.

build/config/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/allocator.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/features.gni")
@@ skipping 270 matching lines @@
     configs += _windows_linker_configs
 
     # Currently only turn on linker CFI for executables.
     configs += [ "//build/config/win:cfi_linker" ]
   } else if (is_mac) {
     configs += [
       "//build/config/mac:mac_dynamic_flags",
       "//build/config/mac:mac_executable_flags",
     ]
   } else if (is_ios) {
-    configs += [ "//build/config/ios:ios_dynamic_flags" ]
+    configs += [
+      "//build/config/ios:ios_dynamic_flags",
+      "//build/config/ios:ios_executable_flags",
+    ]
   } else if (is_linux || is_android) {
     configs += [ "//build/config/gcc:executable_ldconfig" ]
     if (is_android) {
       configs += [ "//build/config/android:executable_config" ]
     } else if (is_chromecast) {
       configs += [ "//build/config/chromecast:executable_config" ]
     }
   }
 
   # If we're using the prebuilt instrumented libraries with the sanitizers, we
@@ skipping 55 matching lines @@
       # variant for each language used in the target).
       precompiled_source = "//build/precompile.cc"
 
       # Force include the header.
       cflags = [ "/FI$precompiled_header" ]
     } else if (is_mac) {
       precompiled_source = "//build/precompile.h"
     }
   }
 }