[U-Boot] [PATCH v4] Switch from archive libraries to partial linking

[Detlev Zundel]

Hi,

> On Monday, November 15, 2010 07:13:03 Sebastien Carlier wrote:
>> On 2010-11-15 11:54:07, Wolfgang Denk wrote:
>> > I notice that the patch affects the size of the resulting U-Boot
>> > images.
>> > 
>> > For example:
>> > 
>> > Configuring for MiniFAP - Board: TQM5200, Options: MINIFAP
>> > 
>> >    text    data     bss     dec     hex filename
>> >  
>> >  358144   35208  303248  696600   aa118 ./u-boot	before
>> >  361340   35824  303332  700496   ab050 ./u-boot	after
>> > 
>> > -------------------------------
>> > 
>> > 		Delta:   +3896 Bytes
>> > 
>> > For other boards it's only a few hundred bytes, but why do we see
>> > such big increase here?
>> 
>> In this case, these libraries contribute 3260 bytes in unused
>> definitions:
>> 
>> In each case, a whole object file contains exactly the unused
>> definitions, and could be excluded in the respective Makefile.
>
> or just use -ffunction-sections/-fdata-sections/-Wl,--gc-sections and dont 
> worry about it.  which is what we do for the Blackfin port.

If you do worry, you can use the "--gc-sections" together with
"--print-gc-sections" to actually find out what is unused[1].

Cheers
  Detlev

[1] http://article.gmane.org/gmane.comp.boot-loaders.u-boot/84971/

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