Change to DSO-linking semantics of the compiler
chwang at redhat.com
Wed Jan 13 15:09:48 UTC 2010
----- "Jussi Lehtola" <jussilehtola at fedoraproject.org> wrote:
> So is --as-needed within the current default flags?
As far as I know, no. The default will still be --no-as-needed.
If anyone reading this is interested/confused, I think the
The --as-needed flag will link libraries if
A) they define symbols required by object files
B) those symbols are still undefined when the library is checked
With the --as-needed option it is possible that libraries
explicitly specified on the command line will not get
linked. e.g. if I specify '--as-needed -l1 -l2' where the object
files only require -l1 and -l1 depends on -l2, -l2 will not get
The default behaviour is (and afaik will remain) --no-as-needed.
The new feature will link libraries explicitly passed on the
command line, but will not automatically link dependencies. So
if -l1 depends on -l2, I have to pass '-l1 -l2' to the command line.
Having done so, however, I will then know that -l1 and -l2 will be
This is afaik, please feel free to correct me if I am mistaken :)
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