linker script, /DISCARD/ section and SHT_GROUP

[Alan Modra]

On Wed, Nov 13, 2019 at 10:52:15AM +0100, Serge Guelton wrote:
> I find this behavior relatively strange with respect to group semantic: we end
> up with a group with one of its member stripped, and the others happily living
> around.

I don't see anything particularly strange.  A section group typically
is used to package up code, data and debug info for a function.  You
normally want to include or exclude the whole group, but in some cases
you might want to exclude all sections of a particular type.  An
obvious example is when stripping debug info.  Other abnormal cases
surely exist, allowed for by /DISCARD/.

-- 
Alan Modra
Australia Development Lab, IBM