public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "eblake at redhat dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/65446] Improve -Wformat-signedness Date: Thu, 21 May 2015 16:11:00 -0000 [thread overview] Message-ID: <bug-65446-4-ciulyJN9lK@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-65446-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65446 Eric Blake <eblake at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |eblake at redhat dot com --- Comment #2 from Eric Blake <eblake at redhat dot com> --- 'unsigned short' promotes to 'int', not 'unsigned int', when passed through var-args. The warning is technically correct, but annoying, since all values of 'unsigned short' are representable in both 'int' and in 'unsigned int', therefore %d vs. %u won't ever have to deal with a negative value. "%u" with signed 'short' should indeed warn, because that is a case where promotion to 'int' differs from printing unsigned values. "%x" with 1 should indeed warn, because that is passing 'int'. Use "%x" with 1U if you want to avoid the warning.
next prev parent reply other threads:[~2015-05-21 16:11 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-65446-4@http.gcc.gnu.org/bugzilla/> 2015-03-17 8:53 ` burnus at gcc dot gnu.org 2015-05-21 16:11 ` eblake at redhat dot com [this message] 2015-05-21 17:26 ` eblake at redhat dot com
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-65446-4-ciulyJN9lK@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).