The first command line uses hyphens with at least one blank separating options. The second uses slashes and no separation is needed.
The first command line uses hyphens with at least one blank separating options. The second uses slashes and no separation is needed.
第一个编译命令用“-”引出参数，且参数之间有多个空格分隔。第二个编译命令用“/”引出参数，参数之间不必要分隔。