[Bug ld/23304] ARM linker fails to combine identical typeinfo sections

[nickc at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23304

Nick Clifton <nickc at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #4 from Nick Clifton <nickc at redhat dot com> ---
Right - this is an ARM API issue.

If you compile with the default API for ARM (the AAPCS) then you get
global typeinfo symbols because:

  /* \S 3.2.5.4 of the ARM C++ ABI says that class data only have
     vague linkage if the class has no key function.  */

This is from gcc/config/arm/arm.c:arm_cxx_class_data_always_comdat().

If you compile with a different API, eg apcs-gnu, then you get weak
linkage for typeinfo symbols.

Either way this is not a binutils bug, so I am closing this BZ.

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