請教 getopt_long不能正確識別選項少了參數(shù)？

ljpdxj

使用該函數(shù)，為何它不能正確識別選項少了參數(shù)

比如
./Test --module --compress-method

其中--module是一定需要參數(shù)的

這里故意不給--module指定參數(shù)，為何它會把--compress-method認為是它的參數(shù)。。。。
而不是返回程式想要的冒號:    ? (optstring第一個字符指定為了冒號)

感謝感謝�。。。。。。。。�！

man 3 getopt_long:

RETURN VALUE
       If  an option was successfully found, then getopt() returns the option character.  If all command-line options have been parsed, then getopt() returns -1.  If getopt() encounters an option character that was
       not in optstring, then ’?’ is returned. If getopt() encounters an option with a missing argument, then the return value depends on the first character in optstring: if it is ’:’, then ’:’ is returned;  oth-
       erwise ’?’ is returned.

       getopt_long()  and  getopt_long_only()  also return the option character when a short option is recognized.  For a long option, they return val if flag is NULL, and 0 otherwise.  Error and -1 returns are the
       same as for getopt(), plus ’?’ for an ambiguous match or an extraneous parameter.

ljpdxj

gcc -o -g /Test.c
居然生成了-g可執(zhí)行文件...

應(yīng)該算正常的行為，謝謝~