diff -up qt-everywhere-opensource-src-4.8.6/configure.gcc5 qt-everywhere-opensource-src-4.8.6/configure
--- qt-everywhere-opensource-src-4.8.6/configure.gcc5	2015-02-13 06:57:07.229735742 -0600
+++ qt-everywhere-opensource-src-4.8.6/configure	2015-02-13 07:00:59.103801127 -0600
@@ -8038,6 +8038,10 @@ g++*)
         QT_GCC_MINOR_VERSION=`echo $COMPILER_VERSION | sed 's,^\([0-9]*\)\.\([0-9]*\).*,\2,'`
         QT_GCC_PATCH_VERSION=0
         ;;
+    *)
+        QT_GCC_MAJOR_VERSION=$COMPILER_VERSION
+        QT_GCC_MINOR_VERSION=0
+        QT_GCC_PATCH_VERSION=0
     esac
 
     case "$COMPILER_VERSION" in