-fnative-struct improves timings slightly.

Christopher Faylor cgf@redhat.com
Tue Nov 14 07:14:00 GMT 2000


On Tue, Nov 14, 2000 at 05:32:08AM -0800, Earnie Boyd wrote:
>--- Christopher Faylor <cgf@redhat.com> wrote:
>> On Mon, Nov 13, 2000 at 10:49:58AM -0800, Earnie Boyd wrote:
>> >There's been talk about -fnative-struct switch on the MinGW list and I
>> thought
>> >I'd give it a try when building Cygwin.  Here are the timings:
>> >
>> >Before -fnative-struct:
>> >        User time (seconds): 536.17
>> >        System time (seconds): 593.31
>> >        Percent of CPU this job got: 60%
>> >        Elapsed (wall clock) time (h:mm:ss or m:ss): 31:16.34
>> >
>> >After -fnative-struct:
>> >        User time (seconds): 529.86
>> >        System time (seconds): 469.90
>> >        Percent of CPU this job got: 61%
>> >        Elapsed (wall clock) time (h:mm:ss or m:ss): 26:52.60
>> >
>> >BTW, FYI, the discussion in MinGW suggests that -fnative-struct improves
>> >intercompatibility with MSVC.
>> 
>> This switch is not in the main gcc sources.  Apparently it is one of
>> the additions that Mumit made to "his" version of gcc.  That's what
>> we're using currently for cygwin but it's apt to disppear unless
>> someone champions getting this into the main repository.
>> 
>
>A patch was supplied to GCC by Donn Terry of Interix.Com.  See
> http://gcc.gnu.org/ml/gcc-patches/1999-06n/msg00702.html .

I'm aware of that.  The patch is not in the main gcc sources.  That is
my point.

cgf


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