Add missing linker flags to allow use of custom frameworks on iOS.

build/config/ios/rules.gni

 # Copyright 2015 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/ios/ios_sdk.gni")
 import("//build/config/mac/base_rules.gni")
 import("//build/config/mac/symbols.gni")
 
 # Invokes lipo on multiple arch-specific binaries to create a fat binary.
 #
@@ skipping 421 matching lines @@
     if (!defined(deps)) {
       deps = []
     }
     deps += [ ":$_arch_executable_source" ]
 
     if (!defined(libs)) {
       libs = []
     }
     libs += [ "UIKit.framework" ]
 
+    if (!defined(ldflags)) {
+      ldflags = []
+    }
+    ldflags += [
+      "-Xlinker",
+      "-rpath",
+      "-Xlinker",
+      "@executable_path/Frameworks",
+      "-Xlinker",
+      "-objc_abi_version",
+      "-Xlinker",
+      "2",
+    ]
+
     if (use_ios_simulator) {
       deps += [ ":$_generate_entitlements_target($default_toolchain)" ]
 
       if (!defined(inputs)) {
         inputs = []
       }
       inputs += [ _generate_entitlements_output ]
 
       if (!defined(ldflags)) {
         ldflags = []
@@ skipping 406 matching lines @@
     _output_name = invoker.output_name
   }
 
   _has_public_headers =
       defined(invoker.public_headers) && invoker.public_headers != []
 
   if (_has_public_headers) {
     _framework_headers_target = _target_name + "_framework_headers"
     _framework_headers_config = _target_name + "_framework_headers_config"
     _headers_map_config = _target_name + "_headers_map"
-    _install_name_config = _target_name + "_install_name"
   }
 
   _arch_shared_library_source = _target_name + "_arch_shared_library_sources"
   _arch_shared_library_target = _target_name + "_arch_shared_library"
   _lipo_shared_library_target = _target_name + "_shared_library"
 
   source_set(_arch_shared_library_source) {
     forward_variables_from(invoker,
                            "*",
                            [
@@ skipping 39 matching lines @@
 
     visibility = [ ":$_lipo_shared_library_target($default_toolchain)" ]
     if (current_toolchain != default_toolchain) {
       visibility += [ ":$_target_name" ]
     }
 
     if (!defined(deps)) {
       deps = []
     }
     deps += [ ":$_arch_shared_library_source" ]
-    configs += [ ":$_install_name_config($default_toolchain)" ]
+
+    if (!defined(ldflags)) {
+      ldflags = []
+    }
+    ldflags += [
+      "-Xlinker",
+      "-install_name",
+      "-Xlinker",
+      "@rpath/$_output_name.framework/$_output_name",
+      "-Xlinker",
+      "-objc_abi_version",
+      "-Xlinker",
+      "2",
+    ]
 
     output_extension = ""
     output_name = _output_name
     output_prefix_override = true
     output_dir = "$target_out_dir/$current_cpu"
   }
 
   if (current_toolchain != default_toolchain) {
     # For fat builds, only the default toolchain will generate a framework
     # bundle. For the other toolchains, the template is only used for building
@@ skipping 76 matching lines @@
         outputs = [
           "$_framework_root/Headers/{{source_file_part}}",
         ]
       }
 
       config(_headers_map_config) {
         visibility = [ ":$_target_name" ]
         include_dirs = [ _header_map_filename ]
       }
 
-      config(_install_name_config) {
-        visibility = [ ":$_target_name" ]
-        ldflags = [
-          "-install_name",
-          "@rpath/$_output_name.framework/$_output_name",
-        ]
-      }
-
       group(_framework_headers_target) {
         deps = [
           ":$_compile_headers_map_target",
           ":$_copy_public_headers_target",
           ":$_create_module_map_target",
         ]
       }
 
       config(_framework_headers_config) {
         # The link settings are inherited from the framework_bundle config.
@@ skipping 280 matching lines @@
       "-rpath",
       "-Xlinker",
       "@loader_path/Frameworks",
     ]
   }
 }
 
 set_defaults("ios_xctest_test") {
   configs = default_executable_configs
 }