Fixing gcc detection

script/detect_gcc

@@ -148,7 +148,7 @@ function detect_compiler()
       fi
 
       g++ --version | grep "clang" > /dev/null 2>&1
-      if [ $? == 0 $gpp_found -ne 1 ]; then
+      if [ $? == 0 -a $gpp_found -ne 1 ]; then
         dgc_major=$(g++ --version | grep g++ | sed 's/.*\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\1/g')
         dgc_middle=$(g++ --version | grep g++ | sed 's/.*\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\2/g')
         dgc_minor=$(g++ --version | grep g++ | sed 's/.*\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\3/g')