shell读取文件操作遇到的诡异现象

清钟沁桐 2011-03-03 01:03:10



            -W) local WOption=${2%%,*};         # 增加-W选项,以便区分-Wl,@file 情形 20110303 

	    	echo "-----------------WOption = $WOption";

	    	case "$WOption" in   

	    	     "a" ) CFLAGS="$CFLAGS -W$2";;          # 汇编阶段有效

	    	     "p" ) CPPFLAGS="$CPPFLAGS -W$2";;      # 预处理阶段有效          

                     "l" ) local list=${2#*,};              # 链接阶段有效

                           # echo first: ${list:0:1}        # 取第一个字符 20110303

                           if [ ${list:0:1} == "@" ]; then  # 由于XCC对ho文件的链接不支持，需要做特别处理       

                               filename=${list#*@}          # 截除第一个字符@

                               #echo "filename=$filename";  

                               for i in `cat $filename`; do 

                                   echo i="$i";

                                   EXISTING_HO_FILES="$EXISTING_HO_FILES $i";

                                   echo eeeeeeeeeeeeeeeeeeeee33

                                   echo EXISTING_HO_FILES="$EXISTING_HO_FILES";

                                   echo dddddddddddddddddddddddd

                               done

                               #CFLAGS="$CFLAGS -W$2";      # 不要记录到变量CFLAGS中

                           else 

                               CFLAGS="$CFLAGS -W$2";

                           fi    

                           echo ++++++*************+EXISTING_HO_FILES="$EXISTING_HO_FILES";

                           ;;                                                                   

        	     *) echo "else"; CPPFLAGS="$CPPFLAGS -W$2"; CFLAGS="$CFLAGS -W$2";;

    		esac

            shift 2;;

这个代码为什么执行显示：

-----------------WOption = l
++++++*************+EXISTING_HO_FILES=
-----------------WOption = p
-----------------WOption = klasld
else
-----------------WOption = a
-----------------WOption = l
i=dsps1.o
eeeeeeeeeeeeeeeeeeeee33
EXISTING_HO_FILES= dsps1.o
dddddddddddddddddddddddd
i=dsps2.o
eeeeeeeeeeeeeeeeeeeee33
dsps2.o_HO_FILES= dsps1.o
dddddddddddddddddddddddd
i=dsps3.o
eeeeeeeeeeeeeeeeeeeee33
dsps3.o_HO_FILES= dsps1.o
dddddddddddddddddddddddd
i=dsps4.o
eeeeeeeeeeeeeeeeeeeee33
dsps4.o_HO_FILES= dsps1.o
dddddddddddddddddddddddd
dsps4.o***********+EXISTING_HO_FILES= dsps1.o

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