Fix multiarch FHS exception for i386 in light of recent discussions

The current value of DEB_HOST_GNU_TYPE on i386 is unsuitable for
cross-distro standardization, because it varies according to the default CPU
target of the toolchain.  Discussion with the toolchain and dpkg maintainers
yielded an alternative solution, a new dpkg-architecture variable
DEB_HOST_MULTIARCH which is committed to dpkg upstream in commit
af3153d09aa3ed5597d6d415e5ab7cc3ba972e7c and will be included in the upload
of dpkg 1.16.0.  Update Policy to document this new requirement for
multiarch.

diff --git a/policy.sgml b/policy.sgml
index 6e04c813f9861ef90e421f15cce2c6ec6b46d986..c708a18620a18bc14e9cdf19b4a7bd8fc8bce263 100644 (file)
--- a/policy.sgml
+++ b/policy.sgml
@@ -6027,13 +6027,13 @@ install -m644 debian/shlibs.<var>package</var> debian/<var>package</var>/DEBIAN/
                   <file>/lib/<var>triplet</var></file> and
                   <file>/usr/lib/<var>triplet</var></file>, where
                   <tt><var>triplet</var></tt> is the value returned by
-                  <tt>dpkg-architecture -qDEB_HOST_GNU_TYPE</tt> for the
+                  <tt>dpkg-architecture -qDEB_HOST_MULTIARCH</tt> for the
                   architecture of the package.  Packages may <em>not</em>
                   install files to any <var>triplet</var> path other
                   than the one matching the architecture of that package;
                   for instance, an <tt>Architecture: amd64</tt> package
                   containing 32-bit x86 libraries may not install these
-                  libraries to <file>/usr/lib/i486-linux-gnu</file>.
+                  libraries to <file>/usr/lib/i386-linux-gnu</file>.
                   <footnote>
                     This is necessary in order to reserve the directories for
                     use in cross-installation of library packages from other

diff --git a/upgrading-checklist.sgml b/upgrading-checklist.sgml
index e69607733ac978fd805ada3cb0deae562ed28234..2138b5ccec240182956e357fbe1ca9407fa47abb 100644 (file)
--- a/upgrading-checklist.sgml
+++ b/upgrading-checklist.sgml
@@ -58,6 +58,13 @@ Unreleased.
   that install <prgn>/usr/bin/mailx</prgn> and implement at least the
   POSIX-required interface.
   </item>
+<tag>9.1.1</tag>
+  <item>Packages installing to architecture-specific subdirectories of
+  <file>/url/lib</file> must use the value returned by
+  <prgn>dpkg-architecture -qDEB_HOST_MULTIARCH</prgn>, not by
+  <prgn>dpkg-architecture -qDEB_HOST_GNU_TYPE</prgn>; this is a path change
+  on i386 architectures and a no-op for other architectures.
+  </item>
 </taglist></p>
 
 <sect> Version 3.9.1.0