Re: [? SPAM ?] Re: [Mingw-users] DLLs with debug-info for MinGW/MSVC

[Christophe G. <gr...@cg...>]

On Tue, 13 Dec 2005, Keith MARSHALL wrote:

> David Lamy-Charrier wrote:
>> I just investigated in details the compiler options available for
>> MSVC6.0 (cl.exe) and it appears that /Oy (Frame-Pointer Omission)
>> is enabled by default in "Release" build:
>> It certainly does not help GDB to decode the stack frame ....
>
> Indeed, it wouldn't.  The GCC equivalent is `-fomit-frame-pointer';
> the documentation for that warns that it `makes debugging impossible
> on some machines':
> http://gcc.gnu.org/onlinedocs/gcc-3.4.4/gcc/Optimize-Options.html#index-fomit_002dframe_002dpointer-371
>
>> I will have a try without this option to see if it improves stack
>> decoding.
>
> BTW, `-fomit-frame-pointer' is automatically enabled at all levels
> of optimisation in GCC, except `-O0';  it has always struck me as

Not exactly. Extract of man page
"-O also turns on -fomit-frame-pointer on machines where doing
so does not interfere with debugging."

 	Christophe

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