Upstream commit e02f3580311d50b617427652ff77988f6bd62d9d adding Boost 1.76
compatibility.

diff --git a/librecad/src/lib/engine/rs_ellipse.cpp b/librecad/src/lib/engine/rs_ellipse.cpp
index 291f734ea..d47bf6ca4 100644
--- a/librecad/src/lib/engine/rs_ellipse.cpp
+++ b/librecad/src/lib/engine/rs_ellipse.cpp
@@ -48,6 +48,9 @@
 #include <boost/version.hpp>
 #include <boost/math/tools/roots.hpp>
 #include <boost/math/special_functions/ellint_2.hpp>
+#if BOOST_VERSION > 104500
+#include <boost/math/tools/tuple.hpp>
+#endif
 #endif
 
 namespace{
td><td class='form'><form method='get'>
<input type='hidden' name='id' value='03592a6f882f5b4309f77c3dc3e65559d7b7cb75'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>refs</a><a class='active' href='/guix/log/gnu/packages/language.scm'>log</a><a href='/guix/tree/gnu/packages/language.scm?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>tree</a><a href='/guix/commit/gnu/packages/language.scm?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>commit</a><a href='/guix/diff/gnu/packages/language.scm?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/language.scm'>
<input type='hidden' name='id' value='03592a6f882f5b4309f77c3dc3e65559d7b7cb75'/><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=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>root</a>/<a href='/guix/log/gnu?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>gnu</a>/<a href='/guix/log/gnu/packages?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>packages</a>/<a href='/guix/log/gnu/packages/language.scm?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75'>language.scm</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/gnu/packages/language.scm?id=03592a6f882f5b4309f77c3dc3e65559d7b7cb75&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-08-11 18:55:45 +0200'>2018-08-11</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=d2b8900f58b269a8e1bc66510aca264ab653fb8c'>gnu: perl-lingua-en-tagger: Update to 0.29.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-08-11 17:22:31 +0200'>2018-08-11</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=9aba9b127840a116c806a2cbac901cf8077abcd0'>Migrate search.cpan.org home pages to metacpan.org.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-03-20 17:17:58 +0100'>2018-03-20</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=4a78fd4617908546be15d2c101f5cab512c71f8e'>Correct name and Email for ng0.</a><span class='msg-avail'>...</span></td><td>ng0</td></tr>
<tr><td><span title='2018-03-15 19:11:14 +0100'>2018-03-15</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=97c794942af813965e1f0113023d1fae234d7c1a'>gnu: perl-string-toidentifier-en: Update to 0.12.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-03-15 19:11:14 +0100'>2018-03-15</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=cd75b642d983000717e8b73b6402b1f67d1343a6'>gnu: perl-lingua-en-inflect-phrase: Update to 0.20.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2018-01-19 16:53:46 -0800'>2018-01-19</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=e8409dd2754259e6478ebcba390738f832452191'>gnu: perl-lingua-pt-stemmer: Update URL.</a><span class='msg-avail'>...</span></td><td>ng0</td></tr>
<tr><td><span title='2017-12-24 16:12:18 +0100'>2017-12-24</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=8895a968e470696d955cc712ed92aa34926a3af1'>gnu: dotherside: Update to 0.6.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-12-16 02:57:47 +0100'>2017-12-16</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=a4b7142e02a8a37d34ca884e140afc34867e7292'>gnu: perl-lingua-stem-ru: Update to 0.04.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-12-16 02:57:46 +0100'>2017-12-16</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=ce0be1bcf4a45ef278ee4240fa793b05e09d7b4f'>gnu: perl-lingua-en-inflect: Update to 1.903.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-11-13 23:03:01 +0100'>2017-11-13</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=5ccde2079e0b5f6e04b11765905dbd49d191fd8f'>gnu: Move test packages from perl to perl-check.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2017-05-02 23:41:14 +0200'>2017-05-02</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=2f3108ad036d5d59d0c8247703ba22adb57638e5'>gnu: Avoid circular dependencies by Perl license.</a><span class='msg-avail'>...</span></td><td>Petter</td></tr>
<tr><td><span title='2017-04-04 00:17:29 +0200'>2017-04-04</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=153ea992e8489384e723db10617107016835cc03'>gnu: perl-lingua-en-tagger: Update to 0.28.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-04 00:17:29 +0200'>2017-04-04</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=5b5b4edfcc4441db6b97d11dbec3533fee2b825e'>gnu: perl-lingua-en-number-isordinal: Update to 0.05.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-04 00:17:29 +0200'>2017-04-04</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=e2fb341f8fd29a051523c5362967c925f869ce85'>gnu: perl-lingua-en-inflect-number: Update to 1.12.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-04 00:17:28 +0200'>2017-04-04</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=3581c3571ac70734bbd6fe9596cbac9eb57e68ae'>gnu: perl-lingua-en-inflect: Update to 1.901.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-04 00:17:28 +0200'>2017-04-04</span></td><td><a href='/guix/commit/gnu/packages/language.scm?id=84f06e540c4fbaf048e2212396ac780d9f78e314'>gnu: perl-lingua-en-findnumber: Update to 1.32.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>