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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<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=fb32e226ce3d3cd9bf12989850b2dd719266d583'>tests: Use the client 'start-service' procedure.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-03 17:55:35 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=2799ad44234be675f018115f99be98d2c9fd565d'>services: dbus: Deprecate 'dbus-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2023-01-08 15:15:09 -0500'>2023-01-08</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=064c5b7e450f9f6d55cfcd0ec2bc9e96ee0b2958'>gnu: Remove linux-libre 4.9.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2022-12-12 20:23:32 +0100'>2022-12-12</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=2c1b488d19831702288b8bdee4cecf661da91b60'>tests: Add system tests for each supported kernel version.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-11-18 15:44:39 +0100'>2022-11-18</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=8d9647d8a77a67013c48166561134d92b5224264'>services: Add Shepherd 'configuration' action to various services.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-11-17 11:10:09 +0100'>2022-11-17</span></td><td><a href='/guix/commit/gnu/tests/base.scm?id=00b9ab0a8332528bdfb4aee58ddb975596cb2042'>tests: root-unmount: Wait for the first QEMU process to finish.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>