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Re: linker behaviour for sections having flags SHF_MERGE/SHF_STRINGS
The testcase ran fine with -O2.
Is there any document, that specifies the optimizations done at each level ?
Ian Lance Taylor-3 wrote:
> On Fri, Nov 9, 2012 at 5:40 PM, Cary Coutant <firstname.lastname@example.org> wrote:
>>>> $gold merge_test.o
>>>> $ readelf -p 2 a.out
>>>> String dump of section '.rodata':
>>>> [ 0] abc
>>>> [ 4] c
>>>> Question :-
>>>> Why is the difference ?
>>> Possibly a gold bug.
>> Try running gold with the -O2 option. By default, gold won't do the
>> trailing substring optimization.
> And that is because we looked at some very large executables and found
> that it almost never fired, but took something like 5% of total link
> time. It's available if you want it but on average it doesn't seem
> like a good tradeoff by default.
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