message: open -O2 optimization
diff: @@ -43,11 +43,11 @@ CC = ccache g++
  #NOTICE: -O2 is recommended, while -O3 is dangerous
  #when developing, not use -O because it will disturb the normal
  #routine. use it for test and release.
  -CFLAGS = -c -Wall -g #-fprofile-arcs -ftest-coverage #-pg
  -EXEFLAG = -g #-fprofile-arcs -ftest-coverage #-pg
  +#CFLAGS = -c -Wall -g #-fprofile-arcs -ftest-coverage #-pg
  +#EXEFLAG = -g #-fprofile-arcs -ftest-coverage #-pg
  #-coverage
  -#CFLAGS = -c -Wall -O2
  -#EXEFLAG = -O2
  +CFLAGS = -c -Wall -O2
  +EXEFLAG = -O2
  #add -lreadline -ltermcap if using readline or objs contain readline
  library = -ltermcap -lreadline -L./lib -lantlr -lgcov
  