[ccache] Could ccache handle the input as .o file as well as source file.

xiaoxiao xiaoxiao at baidu.com
Mon Mar 14 21:56:20 MDT 2011

于 2011/3/15 11:33, Mike Frysinger 写道:
Sorry, but what do you mean?


> On Mon, Mar 14, 2011 at 23:17, xiaoxiao wrote:
>> I've been using ccache recently, in order to decline the compilation
>> time for a certain module. In this module, with the help of the greatest
>> ccache, the time could be shorten to 5 mins from 40 mins without any
>> modification. However, even if the output of all the source files are
>> cached, we have to take about the 5 mins mainly in the linking action,
>> eg: a.o ->  test_a(exetuable). Since I have noticed that ccache do not
>> take the .o file as a input to be cached. The actions as linking would
>> certainly not be ccached, and thus the time for linking would not
>> significant reduced.
>> Given this background, I have a few questions to talk about. Have anyone
>> ever considered to build up a mapping between .o file and its output? If
>> so, why ccache did not provide such feature. If not, do you think it is
>> a reasonable feature for ccache to reduce the time for linking in a
>> compilation?
> try switching to gold
> -mike

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