Hi,
first of all, Maett and Paul, thank you very much for your replies! :-)
Paul Pluzhnikov wrote:
I guess what happens is that when the linker links the executable, it
removes all symbols from libcfsLib.a that are unused by the
executable.
Not quite: the linker doesn't remove anything from anywhere; it
simply doesn't pull in the objects that it doesn't need.
Ah, okay. ;) My thought was that it first just duplicates or
"concatenates" everything that I specify on the command line in scratch
memory, then does a "flood fill" to flag everything that is needed, and
finally creates the final executable by removing the non-flagged parts
from scratch memory again.
So as your text about linkers makes clear, my assumption that
executables are entirely pre-built in (scratch) memory was somewhat wrong.
You may wish to read this for an explanation:
http://webpages.charter.net/ppluzhnikov/linker.html
If you only care about GNU ld, the --whole-archive is a good
solution. If you care about portability to other linkers, use
multiple '-u needed_symbol_1' ...
If there are too many needed symbols, another alternative is to
create an object file which will "pull" them all in:
Great! Many thanks for your detailed answer!
Best,
Carsten
--
Ca3D - Engine http://www.Ca3D-Engine.de
Carsten Fuchs http://www.Ca3D-Engine.de/c_Carsten.php
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