Backported fix for ccache

Fixed compiler warnings
Added --big-test to tokudb change_column_char & change_column_bin

BUILD/SETUP.sh

@@ -31,6 +31,7 @@ Usage: $0 [-h|-n] [configure-options]
   -h, --help              Show this help message.
   -n, --just-print        Don't actually run any commands; just print them.
   -c, --just-configure    Stop after running configure.
+                          Combined with --just-print shows configure options.
   --extra-configs=xxx     Add this to configure options
   --extra-flags=xxx       Add this C and CXX flags
   --extra-cflags=xxx      Add this to C flags
@@ -257,6 +258,10 @@ fi
 # (http://samba.org/ccache) is installed, use it.
 # We use 'grep' and hope 'grep' will work as expected
 # (returns 0 if finds lines)
+
+# As cmake doesn't like CC and CXX with a space, use symlinks from
+# /usr/lib64/ccache if they exits.
+
 if test "$USING_GCOV" != "1"
 then
   # Not using gcov; Safe to use ccache
@@ -265,8 +270,14 @@ fi
 
 if ccache -V > /dev/null 2>&1 && test "$CCACHE_GCOV_VERSION_ENABLED" = "1"
 then
-  echo "$CC" | grep "ccache" > /dev/null || CC="ccache $CC"
-  echo "$CXX" | grep "ccache" > /dev/null || CXX="ccache $CXX"
+    if test -x /usr/lib64/ccache/gcc
+    then
+        CC=/usr/lib64/ccache/gcc
+    fi
+    if test -x /usr/lib64/ccache/g++
+    then
+        CXX=/usr/lib64/ccache/g++
+    fi
 fi
 
 # gcov