Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>

[Joseph Myers <joseph@codesourcery.com>]

On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:

> Changes in v7:
> 
> 1. Move set_translated_address_mask to libc_nonshared.a.

Code in *_nonshared.a or crt*.o should include the LGPL exception wording:

   In addition to the permissions in the GNU Lesser General Public
   License, the Free Software Foundation gives you unlimited
   permission to link the compiled version of this file with other
   programs, and to distribute those programs without any restriction
   coming from the use of this file. (The GNU Lesser General Public
   License restrictions do apply in other respects; for example, they
   cover modification of the file, and distribution when not linked
   into another program.)

   Note that people who make modified versions of this file are not
   obligated to grant this special exception for their modified
   versions; it is their choice whether to do so. The GNU Lesser
   General Public License gives permission to release a modified
   version without this exception; this exception also makes it
   possible to release a modified version which carries forward this
   exception.

(The point being that people linking with glibc should be able to meet 
their LGPL obligations by linking dynamically, without also needing to 
provide a way to relink with modified versions of the *_nonshared.a code.)

Presumably when we get DCO contributions to such files we also need to 
adjust the exception wording accordingly regarding who gives the above 
permission.

-- 
Joseph S. Myers
joseph@codesourcery.com