Patch taken from the Sage packaging system.

diff -Naur lcalc-1.23-vanilla/include/Ldirichlet_series.h lcalc-1.23-fixed-gcc.4.9/include/Ldirichlet_series.h
--- lcalc-1.23-vanilla/include/Ldirichlet_series.h	2012-08-08 23:21:55.000000000 +0200
+++ lcalc-1.23-fixed-gcc.4.9/include/Ldirichlet_series.h	2014-04-21 14:37:59.027464849 +0200
@@ -43,7 +43,7 @@
  //XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 template <class ttype>
 Complex L_function <ttype>::
-dirichlet_series(Complex s, long long N=-1)
+dirichlet_series(Complex s, long long N)
 {
     Complex z=0.;
     long long m,n;
diff -Naur lcalc-1.23-vanilla/include/L.h lcalc-1.23-fixed-gcc.4.9/include/L.h
--- lcalc-1.23-vanilla/include/L.h	2012-08-08 23:21:55.000000000 +0200
+++ lcalc-1.23-fixed-gcc.4.9/include/L.h	2014-04-21 14:32:04.003467348 +0200
@@ -491,7 +491,7 @@
 
     //#include "Ldirichlet_series.h" //for computing Dirichlet series
     Complex partial_dirichlet_series(Complex s, long long N1, long long N2);
-    Complex dirichlet_series(Complex s, long long N);
+    Complex dirichlet_series(Complex s, long long N=-1LL);
 
     //#include "Ltaylor_series.h" //for computing taylor series for Dirichlet series
     //void compute_taylor_series(int N, int K, Complex s_0, Complex *series);
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<div class='path'>path: <a href='/guix/log/?id=5e23071aa9fc57b471d301fba7a981720743eb6b'>root</a>/<a href='/guix/log/gnu?id=5e23071aa9fc57b471d301fba7a981720743eb6b'>gnu</a>/<a href='/guix/log/gnu/build?id=5e23071aa9fc57b471d301fba7a981720743eb6b'>build</a>/<a href='/guix/log/gnu/build/accounts.scm?id=5e23071aa9fc57b471d301fba7a981720743eb6b'>accounts.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/build/accounts.scm?id=5e23071aa9fc57b471d301fba7a981720743eb6b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-01-01 15:10:12 +0100'>2022-01-01</span></td><td><a href='/guix/commit/gnu/build/accounts.scm?id=671e6a81804f264ddcdd6fe7579644404da079b8'>system: Allow 'chfn' to change the user's full name.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/52539&gt;.
Reported by Jacob First &lt;jacob.first@member.fsf.org&gt;.

* gnu/build/accounts.scm (allocate-passwd): Add comment as to why
'real-name' is taken from PREVIOUS.  Add (not system?) to the
condition.
* gnu/system.scm (operating-system-etc-service) &lt;login.defs&gt;: Add
"CHFN_RESTRICT".
* gnu/system.scm (%setuid-programs): Add "chfn".
* gnu/system/pam.scm (base-pam-services): Add "chfn".
* doc/guix.texi (User Accounts): Document it.
</span></span></td><td>Ludovic Courtès</td></tr>