diff -up qt-everywhere-opensource-src-4.8.7/configure.gcc6 qt-everywhere-opensource-src-4.8.7/configure

--- qt-everywhere-opensource-src-4.8.7/configure.gcc6	2016-04-15 07:04:19.430268222 -0500

+++ qt-everywhere-opensource-src-4.8.7/configure	2016-04-15 07:05:22.157568689 -0500

@@ -7744,7 +7744,7 @@ case "$XPLATFORM" in

     *-g++*)

 	# Check gcc's version

 	case "$(${QMAKE_CONF_COMPILER} -dumpversion)" in

-	    5*|4*|3.4*)

+	    8*|7*|6*|5*|4*|3.4*)

 		;;

             3.3*)

                 canBuildWebKit="no"

@@ -8060,7 +8060,7 @@ g++*)

     3.*)

         COMPILER_VERSION="3.*"

         ;;

-    5*|4.*)

+    8*|7*|6*|5*|4.*)

         COMPILER_VERSION="4"

         ;;

     *)

diff -up qt-everywhere-opensource-src-4.8.7/src/xmlpatterns/api/qcoloroutput_p.h.gcc6 qt-everywhere-opensource-src-4.8.7/src/xmlpatterns/api/qcoloroutput_p.h

--- qt-everywhere-opensource-src-4.8.7/src/xmlpatterns/api/qcoloroutput_p.h.gcc6	2015-05-07 09:14:48.000000000 -0500

+++ qt-everywhere-opensource-src-4.8.7/src/xmlpatterns/api/qcoloroutput_p.h	2016-04-15 07:04:19.431268227 -0500

@@ -70,8 +70,8 @@ namespace QPatternist

             ForegroundShift = 10,

             BackgroundShift = 20,

             SpecialShift    = 20,

-            ForegroundMask  = ((1 << ForegroundShift) - 1) << ForegroundShift,

-            BackgroundMask  = ((1 << BackgroundShift) - 1) << BackgroundShift

+            ForegroundMask  = 0x1f << ForegroundShift,

+            BackgroundMask  = 0x7 << BackgroundShift

         };

     public: