How can ld linker script keep some objs' section?

[Nick Clifton]

Hi xunxun,

> In the end, I want to know now, are there some methods to only keep
> dllcrt2.o's or some objs' .eh_frame section?

Using linker garbage collection to discard unneeded .eh_frame sections 
but keep the needed ones - no.  But if you know before hand which object 
files contain .eh_frame sections that you need to keep then - yes.  You 
just need to use a modified version of the KEEP directives, specifing 
which object files to preserve.  Eg:

   KEEP (dllcrt2.o(.eh_frame))
   KEEP (foo.o(.eh_frame))

This will ensure that the .eh_frame sections in dllcrt2.o and foo.o are 
always retained.


> Or some methods to only keep all .eh_frame sections when building DLL,
> but not static build?

Use different linker scripts when building DLLs and static executables. 
  In one use the KEEP directive(s) and in the other omit them.

Cheers
   Nick