[iOS] Do not strip symbols from host that a framework requires.

Fixes http://hipbyte.myjetbrains.com/youtrack/issue/RM-701.

lib/motion/project/target/framework_target.rb

@@ -96,9 +96,20 @@ PLIST
       File.basename(framework_path)
     end
 
-    # Indicates wether to load the framework at runtime or not
+    # Indicates whether to load the framework at runtime or not
     def load?
       @opts[:load]
     end
+
+    # @return [Array<String>] A list of symbols that the framework requires the
+    #         host application or extension to provide and should not strip.
+    #
+    def required_symbols
+      executable_filename = File.basename(framework_path, '.framework')
+      executable = File.join(framework_path, executable_filename)
+      cmd = "/usr/bin/nm -ju '#{executable}' | /usr/bin/grep -E '^_(rb|vm)_'"
+      puts cmd if App::VERBOSE
+      `#{cmd}`.strip.split("\n")
+    end
   end
 end;end

lib/motion/project/xcode_config.rb

@@ -583,7 +583,6 @@ EOS
 
     attr_accessor :targets
 
-
     # App Extensions are required to include a 64-bit slice for App Store
     # submission, so do not exclude `arm64` by default.
     #
@@ -631,5 +630,28 @@ EOS
         App.fail("Unsupported target type '#{type}'")
       end
     end
+
+    # Creates a temporary file that lists all the symbols that the application
+    # (or extension) should not strip.
+    #
+    # At the moment these are only symbols that an iOS framework depends on.
+    #
+    # @return [String] Extra arguments for the `strip` command.
+    #
+    def strip_args
+      args = super
+
+      frameworks = targets.select { |t| t.type == :framework }
+      required_symbols = frameworks.map(&:required_symbols).flatten.uniq.sort
+      unless required_symbols.empty?
+        require 'tempfile'
+        required_symbols_file = Tempfile.new('required-framework-symbols')
+        required_symbols.each { |symbol| required_symbols_file.puts(symbol) }
+        required_symbols_file.close
+        args << " -s '#{required_symbols_file.path}'"
+      end
+
+      args
+    end
   end
 end; end