set debug options when using the icc compiler

       if test "$ICC" = "yes"; then

         dnl this is icc, not gcc.

         WARN = ""

         dnl Warning 279 warns on static conditions in while expressions,

         dnl ignore that.

         WARN="-wd279"

         if test "$gccnum" -gt "600"; then

            dnl icc 6.0 and older doesn't have the -Wall flag, although it does

            dnl have -wd<n>

            WARN="-Wall $WARN"

         fi

       else dnl $ICC = yes

         dnl 

         WARN="-W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wundef -Wpointer-arith -Wnested-externs -Winline -Wmissing-declarations -Wmissing-prototypes -Wsign-compare"

           fi

         fi

         NEWFLAGS=""

         for flag in $CPPFLAGS; do

           case "$flag" in

            -I*)

              dnl include path

              add=`echo $flag | sed 's/^-I/-isystem /g'`

              NEWFLAGS="$NEWFLAGS $add"

              WARN="$WARN $add"

              ;;

           esac

         done

         CFLAGS="$CFLAGS $WARN $NEWFLAGS"

       fi dnl $ICC = no

       CFLAGS="$CFLAGS $WARN"

    fi dnl $GCC = yes

    dnl strip off optimizer flags