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Re: GCC/G++ compiler: Error goes away when run through debugger

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On Mar 29, 2:42 pm, i...@localhost.claranet.nl (Ike Naar) wrote:
> George Neuner  <gneun...@comcast.net> wrote:
>
> >GCC's -O3 optimization level is widely known to cause strange problems
> >... almost always because the program is violating assumptions made by
> >the more advanced optimizations.
>
> >The -O2 level typically is safe.  If you think you need the -O3
> >optimizations, you should individually enable them to see if any
> >breaks the program.  Specify -O3 only if you find they all work.
>
> Sometimes using -O3 makes the program run slower than when using -O2.

I think you should use some tool like valgrind which might immediately
catch the problem that would be going on.

Also when you use -ggdb I think some of the strings are loaded in
the .data section but gets loaded into the .const data section
otherwise.

-

Shankar

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Re: GCC/G++ compiler: Error goes away when run through debugger George Neuner <gneuner2@comcast.net> - 2011-03-29 12:18 -0400
  Re: GCC/G++ compiler: Error goes away when run through debugger ike@localhost.claranet.nl (Ike Naar) - 2011-03-29 21:42 +0000
    Re: GCC/G++ compiler: Error goes away when run through debugger George Neuner <gneuner2@comcast.net> - 2011-03-31 01:34 -0400
    Re: GCC/G++ compiler: Error goes away when run through debugger Shankar <shankarke@gmail.com> - 2011-04-01 15:31 -0700

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