The `BOOST_LITTLE_ENDIAN` and `BOOST_BIG_ENDIAN` macros, along with the
"boost/detail/endian.hpp" header, were deprecated in boost 1.69.0 and finally
removed in boost 1.73.0.  They are superseded by the BOOST_ENDIAN_LITTLE_BYTE
and BOOST_ENDIAN_BIG_BYTE macros and "boost/predef/other/endian.h" header.

Deprecated: https://github.com/boostorg/predef/commit/32d4581c1689370444f2e565cfbb8421d5071807
Removed:    https://github.com/boostorg/predef/commit/aa6e232bf170ad8b856aff9e7c70334f77441c7f

Adaptation of patch from https://bitbucket.org/fenics-project/dolfin/issues/1116

--- a/dolfin/io/VTKFile.cpp
+++ b/dolfin/io/VTKFile.cpp
@@ -20,7 +20,7 @@
 #include <vector>
 #include <iomanip>
 #include <boost/cstdint.hpp>
-#include <boost/detail/endian.hpp>
+#include <boost/predef/other/endian.h>
 
 #include "pugixml.hpp"
 
@@ -614,9 +614,9 @@
   std::string endianness = "";
   if (encode_string == "binary")
   {
-    #if defined BOOST_LITTLE_ENDIAN
+    #if defined BOOST_ENDIAN_LITTLE_BYTE
     endianness = "byte_order=\"LittleEndian\"";
-    #elif defined BOOST_BIG_ENDIAN
+    #elif defined BOOST_ENDIAN_BIG_BYTE
     endianness = "byte_order=\"BigEndian\"";;
     #else
     dolfin_error("VTKFile.cpp",

--- a/dolfin/io/VTKWriter.cpp
+++ b/dolfin/io/VTKWriter.cpp
@@ -24,7 +24,6 @@
 #include <sstream>
 #include <vector>
 #include <iomanip>
-#include <boost/detail/endian.hpp>

 #include <dolfin/fem/GenericDofMap.h>
 #include <dolfin/fem/FiniteElement.h>
  ' method='get' action='/guix/log/README'>
<input type='hidden' name='id' value='37fc2c99e0067dfd669526c61dc10d014b89c08b'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=37fc2c99e0067dfd669526c61dc10d014b89c08b'>root</a>/<a href='/guix/log/README?id=37fc2c99e0067dfd669526c61dc10d014b89c08b'>README</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/README?id=37fc2c99e0067dfd669526c61dc10d014b89c08b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-20 01:58:04 +0200'>2021-05-20</span></td><td><a href='/guix/commit/README?id=c0087d33705f53cc3619a1a43a33602aaecc3a8b'>The #guix channel is hosted by Libera Chat.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Contact): Update network name.
* ROADMAP: Likewise.
* doc/contributing.texi (Contributing): Likewise.
* doc/guix.texi (After System Installation): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-23 12:57:20 -0400'>2020-10-23</span></td><td><a href='/guix/commit/README?id=b5aaa3a4fb985d21e21e2a67f48b52f13ebd4728'>doc: Update README.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installation): Do not mention installing Guix from Git anymore.
(Building from Git): Add section.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-10-22 22:47:54 -0400'>2020-10-22</span></td><td><a href='/guix/commit/README?id=503d2bfde08f9bf97bbf430516d2f19faedd4319'>README: Refer to the manual for building from Git.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installing Guix from Guix): Remove section.
(Installation): For installing from Git, refer to the "Building from Git"
section of the manual and suggest using './pre-inst-env guix pull' rather than
'make install' for installing Guix.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-06-02 18:55:53 +0200'>2020-06-02</span></td><td><a href='/guix/commit/README?id=c75a80189fc19f6ff8b4c82d1d1801be6763b6d2'>doc: Update README to refer to the manual.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Requirements): Refer to the manual.
(Installation): Update URL of the manual.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-09 23:04:14 +0100'>2019-11-09</span></td><td><a href='/guix/commit/README?id=0758a70cc008171f31c848128deca9803536fe60'>doc: Mention value /var to localstatedir option.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Installing Guix from Guix): Mention value /var to localstatedir option.
* doc/contributing.texi (Building from Git): Likewise.
* doc/guix.texi (Requirements): Likewise.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>zimoun</td></tr>
<tr><td><span title='2019-09-04 23:41:07 +0200'>2019-09-04</span></td><td><a href='/guix/commit/README?id=f475c6e53e5b6912cc45663d50f1d03dadfb60b8'>doc: Update 'README'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README: Update intro a bit.
(Installing Guix as non-root): Remove as it's largely outdated.
(Contact): Update.
</span></span></td><td>Ludovic Courtès</td></tr>