Rename POD_SRCROOT to PODS_ROOT.

lib/cocoapods/installer.rb

@@ -29,8 +29,8 @@ module Pod
       def xcconfig
         @xcconfig ||= Xcodeproj::Config.new({
           # In a workspace this is where the static library headers should be found.
-          'POD_SRCROOT' => '$(SRCROOT)/Pods',
-          'HEADER_SEARCH_PATHS' => '"$(POD_SRCROOT)/Headers"',
+          'PODS_ROOT' => '$(SRCROOT)/Pods',
+          'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Headers"',
           'ALWAYS_SEARCH_USER_PATHS' => 'YES',
           # This makes categories from static libraries work, which many libraries
           # require, so we add these by default.
@@ -132,7 +132,7 @@ module Pod
           config.baseConfiguration = xcconfig_file
           config.buildSettings['OTHER_LDFLAGS'] = ''
           config.buildSettings['GCC_PREFIX_HEADER'] = prefix_header_filename
-          config.buildSettings['POD_SRCROOT'] = '$(SRCROOT)'
+          config.buildSettings['PODS_ROOT'] = '$(SRCROOT)'
         end
       end
 

lib/cocoapods/specification.rb

@@ -296,7 +296,7 @@ module Pod
     # methods.
     def header_search_paths
       dirs = [header_dir] + copy_header_mappings.keys
-      dirs.map { |dir| %{"$(POD_SRCROOT)/Headers/#{dir}"} }
+      dirs.map { |dir| %{"$(PODS_ROOT)/Headers/#{dir}"} }
     end
 
     def to_s