nixpkgs/pkgs/development/libraries/qt-5/5.7/qtwebengine/qtwebengine-paxmark-mksnapshot.patch

--- qtwebengine-opensource-src-5.6.0-orig/src/3rdparty/chromium/v8/tools/gyp/v8.gyp	2016-03-04 01:48:36.000000000 +1100
+++ qtwebengine-opensource-src-5.6.0/src/3rdparty/chromium/v8/tools/gyp/v8.gyp	2016-05-01 19:15:44.052770543 +1000
@@ -33,6 +33,7 @@
     'embed_script%': "",
     'v8_extra_library_files%': [],
     'mksnapshot_exec': '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)mksnapshot<(EXECUTABLE_SUFFIX)',
+    'mksnapshot_u_exec': '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)mksnapshot_u<(EXECUTABLE_SUFFIX)',
     'remove_v8base_debug_symbols%': 0,
   },
   'includes': ['../../build/toolchain.gypi', '../../build/features.gypi'],
@@ -1913,7 +1914,7 @@
         ]
     },
     {
-      'target_name': 'mksnapshot',
+      'target_name': 'mksnapshot_u',
       'type': 'executable',
       'dependencies': ['v8_base', 'v8_nosnapshot', 'v8_libplatform'],
       'include_dirs+': [
@@ -1936,5 +1937,26 @@
         }],
       ],
     },
+    {
+      'target_name': 'mksnapshot',
+      'type': 'executable',
+      'dependencies': ['mksnapshot_u'],
+      'actions': [
+        {
+          'action_name': 'paxmark_m_mksnapshot',
+          'inputs': [
+            '<(mksnapshot_u_exec)',
+          ],
+          'outputs': [
+            '<(mksnapshot_exec)',
+          ],
+          'action': [
+            'sh',
+            '-c',
+            'cp <(mksnapshot_u_exec) <(mksnapshot_exec) && paxctl -czexm <(mksnapshot_exec)',
+          ],
+        },
+      ],
+    },
   ],
 }