Date: Tue, 05 Jan 2016 20:18:27 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205930] clang(1) doesn't document all flags and options Message-ID: <bug-205930-8-xVP0F0XodT@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-205930-8@https.bugs.freebsd.org/bugzilla/> References: <bug-205930-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205930 --- Comment #2 from Steve Kargl <kargl@FreeBSD.org> --- Oh yuck. Long lines and new sentences starting in the middle of a line. diff -u cc.1.orig cc.1 --- cc.1.orig 2016-01-05 11:57:16.699107000 -0800 +++ cc.1 2016-01-05 12:12:47.718444000 -0800 @@ -251,8 +251,15 @@ through Clang compiled stack frames. This is on by default in x86-64. .It Sy -ftrapv Generate code to catch integer overflow errors. Signed integer overflow is -undefined in C, with this flag, extra code is generated to detect this and abort -when it happens. +undefined in C, with this flag, extra code is generated to detect this and +abort when it happens. +.It Sy -funroll-loops +This option is accepted by the compiler, but testing with simply +loops suggests that apparently does nothing. +Surprisingly, +.Nm +does not issue a warning about the omission of what can only be characterized +as a basic optimization. .It Sy -fvisibility This flag sets the default visibility level. .It Sy -fcommon -- You are receiving this mail because: You are the assignee for the bug.
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