Bug#630174: debian-policy: forbid installation into /lib64

[Bill Allombert <ballombe@debian.org>]

On Tue, May 12, 2015 at 09:21:13AM +0900, Charles Plessy wrote:
> Le Mon, May 11, 2015 at 11:30:54AM +0200, Bill Allombert a écrit :
> > 
> > We should document that to prevent /lib64 to be used for wrong purpose.
> > 
> > > In any case I'm not quite sure whether shipping files in lib64 in amd64
> > > packages (juffed/juffed-dev and zynaddsubfx-dssi do this now) is OK.
> > 
> > I only found 
> > zynaddsubfx-dssi: /usr/lib64/dssi/libzynaddsubfx_dssi.so
> > which I think is a RC bug.
> > 
> > But note that this bug is about /lib64, not /usr/lib64
> 
> Hi Bill,
> 
> while the title is only about /lib64, the main text of the original message
> in for this bug is about /lib64 and /usr/lib64.

OK, here a new patch.

Seconds welcome!

Cheers,
-- 
Bill. <ballombe@debian.org>

Imagine a large red swirl here. 

diff --git a/policy.sgml b/policy.sgml
index 404dc73..f9fdbf7 100644
--- a/policy.sgml
+++ b/policy.sgml
@@ -6955,12 +6955,13 @@ Built-Using: grub2 (= 1.99-9), loadlin (= 1.6e-1)
                   character.
                 </p>
               </item>
               <item>
                 <p>
-                  The requirement for amd64 to use <file>/lib64</file>
-                  for 64 bit binaries is removed.
+                  The requirement for amd64 to use <file>/lib64</file> for
+                  64 bit binaries is removed. Only the dynamic linker is
+                  allowed to use this directory.
                 </p>
               </item>
               <item>
                 <p>
                   The requirement for object files, internal binaries, and
@@ -6983,10 +6984,14 @@ Built-Using: grub2 (= 1.99-9), loadlin (= 1.6e-1)
                     use in cross-installation of library packages from other
                     architectures, as part of <tt>multiarch</tt>.
                   </footnote>
                 </p>
                 <p>
+                  No package for a 64 bit architecture may install files
+                  in <file>/usr/lib64/</file> or in a subdirectory of it.
+                </p>
+                <p>
                   The requirement for C and C++ headers files to be
                   accessible through the search path
                   <file>/usr/include/</file> is amended, permitting files to
                   be accessible through the search path
                   <file>/usr/include/<var>triplet</var></file> where