Date: Sat, 10 Jun 2017 23:09:28 +0200 From: Serpent7776 <serpent7776@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: -O2 flag Message-ID: <20170610230928.581e3cf9@DaemONX> In-Reply-To: <593C4679.5010104@gmail.com> References: <593C4679.5010104@gmail.com>
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On Sat, 10 Jun 2017 16:20:25 -0300 Friedrich Locke <friedrich.locke@gmail.com> wrote: > Hi folks, > > i am trying compile a program with cc on freebsd 11. > When i use -O2 compilation flag, the compiled code is giving error on > execution, but with i omit -O2 everything works ok. > > Have anybody already faced such problem ? Yes, a few times in the past. Your code may have hidden bug which is triggered only with optimizations enabled. It might be relying on some kind of undefined behaviour. Unfortunately, I don't have any helpful advices on how to find this error - try enabling all compiler warnings flags. I'd suspect a bug in your code rather than a bug in compiler, but the latter is not impossible. > Thanks in advance. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" -- /* * Serpent7776 */
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