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: