@孙世龙 sunshilong ask on http://www.cplusplus.com/forum/unices/271520/ more suitable / better place to the problem On 7/5/20, gcc-help-request@xxxxxxxxxxx <gcc-help-request@xxxxxxxxxxx> wrote: > Send Gcc-help mailing list submissions to > gcc-help@xxxxxxxxxxx > > To subscribe or unsubscribe via the World Wide Web, visit > http://gcc.gnu.org/mailman/listinfo/gcc-help > or, via email, send a message with subject or body 'help' to > gcc-help-request@xxxxxxxxxxx > > You can reach the person managing the list at > gcc-help-owner@xxxxxxxxxxx > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Gcc-help digest..." >