See https://github.com/fplll/fplll/issues/444

--- fplll-5.3.3-checkout.old/fplll/enum/enumerate_base.h	2020-09-23 13:55:27.833769823 +0200
+++ fplll-5.3.3-checkout/fplll/enum/enumerate_base.h	2020-09-23 13:56:14.313771769 +0200
@@ -127,10 +127,10 @@
   int rounding_backup;
   void save_rounding()
   {
-    rounding_backup = std::fegetround();
-    std::fesetround(FE_TONEAREST);
+    rounding_backup = fegetround();
+    fesetround(FE_TONEAREST);
   }
-  void restore_rounding() { std::fesetround(rounding_backup); }
+  void restore_rounding() { fesetround(rounding_backup); }
 
   inline bool next_pos_up()
   {
get'>
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<tr><td><span title='2017-12-17 17:22:31 +0100'>2017-12-17</span></td><td><a href='/guix/commit/gnu/packages/nutrition.scm?id=217f704c6aa6a95caea0ebb7a252b8b2f1d78860'>gnu: gourmet: Fix runtime failure and enhance plugin.</a><span class='msg-avail'>...</span></td><td>Mark Meyer</td></tr>
<tr><td><span title='2017-11-17 22:36:27 +0100'>2017-11-17</span></td><td><a href='/guix/commit/gnu/packages/nutrition.scm?id=a8714bf6801cf5058fd02bcb1d352a99d12bc870'>gnu: Move database packages from python.scm to databases.scm.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2016-11-15 22:27:31 +0100'>2016-11-15</span></td><td><a href='/guix/commit/gnu/packages/nutrition.scm?id=f3b98f4fec43c951a9e28c67561395992bf190a7'>gnu: Remove python-setuptools and python2-setuptools from inputs (part 2)</a><span class='msg-avail'>...</span></td><td>Hartmut Goebel</td></tr>