Patch taken from the Sage packaging system.

--- lcalc-1.23/include/Lgamma.h	2012-08-08 23:21:55.000000000 +0200
+++ lcalc-1.23/include/Lgamma.h	2014-05-18 21:15:27.786889718 +0200
@@ -77,7 +77,7 @@
 //n=0 should just give log_GAMMA(z)... thus making log_GAMMA
 //code obsolete. But leave log_GAMMA intact anyways.
 template <class ttype>
-precise(ttype) log_GAMMA (ttype z,int n=0)
+precise(ttype) log_GAMMA (ttype z,int n)
 {
     int M;
     precise(ttype) log_G,r,r2,y;
@@ -230,7 +230,7 @@
 //value exp_w which holds exp(-w)
 //computes G(z,w), so there's an extra w^(-z) factor.
 template <class ttype>
-Complex inc_GAMMA (ttype z,ttype w, const char *method="temme", ttype exp_w = 0, bool recycle=false)
+Complex inc_GAMMA (ttype z,ttype w, const char *method, ttype exp_w, bool recycle)
 {
 
     Complex G;
@@ -334,7 +334,7 @@
 
 
 template <class ttype>
-ttype cfrac_GAMMA (ttype z,ttype w, ttype exp_w=0, bool recycle=false)  //computes G(z,w) via continued fraction
+ttype cfrac_GAMMA (ttype z,ttype w, ttype exp_w, bool recycle)  //computes G(z,w) via continued fraction
 {
 
         ttype G;
@@ -424,7 +424,7 @@
 }
 
 template <class ttype>
-ttype asympt_GAMMA (ttype z,ttype w, ttype exp_w = 0, bool recycle=false)  //computes G(z,w) via asymptotic series
+ttype asympt_GAMMA (ttype z,ttype w, ttype exp_w, bool recycle)  //computes G(z,w) via asymptotic series
 {
 
         if(my_verbose>3) cout << "called asympt_GAMMA("<<z<<","<<w<<")"<< endl;
@@ -446,7 +446,7 @@
 
 
 template <class ttype>
-ttype comp_inc_GAMMA (ttype z,ttype w,ttype exp_w = 0, bool recycle=false)  //computes g(z,w)
+ttype comp_inc_GAMMA (ttype z,ttype w,ttype exp_w, bool recycle)  //computes g(z,w)
 {
 
     ttype g;
@@ -604,7 +604,7 @@
 }
 
 template <class ttype>
-Complex gamma_sum(Complex s, int what_type, ttype *coeff, int N, Double g, Complex l, Double Q, Long Period, Complex delta=1, const char *method="temme")
+Complex gamma_sum(Complex s, int what_type, ttype *coeff, int N, Double g, Complex l, Double Q, Long Period, Complex delta, const char *method)
 {
     Complex SUM=0;
 
e4344d2e20b7e306cd39'>root</a>/<a href='/guix/log/etc?id=b3679394ec5a703de957e4344d2e20b7e306cd39'>etc</a>/<a href='/guix/log/etc/snippets?id=b3679394ec5a703de957e4344d2e20b7e306cd39'>snippets</a>/<a href='/guix/log/etc/snippets/scheme-mode?id=b3679394ec5a703de957e4344d2e20b7e306cd39'>scheme-mode</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/etc/snippets/scheme-mode?id=b3679394ec5a703de957e4344d2e20b7e306cd39&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-05-09 00:22:37 -0400'>2019-05-09</span></td><td><a href='/guix/commit/etc/snippets/scheme-mode?id=4ac69ea10f54384ac893313ef738e5ad554ac328'>Add (guix bzr-download).</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/bzr-download.scm, guix/build/bzr.scm,
etc/snippets/scheme-mode/guix-bzr-reference: New files.
* Makefile.am (MODULES): Add them.
* etc/snippets/scheme-mode/guix-origin: Add "bzr-fetch" to the origin choices.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2018-10-10 17:33:42 +0200'>2018-10-10</span></td><td><a href='/guix/commit/etc/snippets/scheme-mode?id=d634db9401ac320383d45e24431442259cf6a2a4'>etc: Use git-file-name if origin is git-fetch.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/scheme-mode/guix-origin: Use git-file-name.
</span></span></td><td>Pierre Neidhardt</td></tr>
<tr><td><span title='2018-07-13 09:27:31 +0530'>2018-07-13</span></td><td><a href='/guix/commit/etc/snippets/scheme-mode?id=202befb4ae775cfdab1566f4a69ec184406a56be'>etc: snippets: Add new build systems to package snippet.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/scheme-mode/guix-package: Add android-ndk-build-system and
scons-build-system as possibilities for the build-system field.
</span></span></td><td>Arun Isaac</td></tr>
<tr><td><span title='2017-12-15 23:15:32 +0100'>2017-12-15</span></td><td><a href='/guix/commit/etc/snippets/scheme-mode?id=42cdcdff1945b112452029c6a79445aac15ffd16'>etc: Add snippets.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/scheme-mode/guix-cvs-reference,
etc/snippets/scheme-mode/guix-git-reference,
etc/snippets/scheme-mode/guix-hg-reference,
etc/snippets/scheme-mode/guix-origin,
etc/snippets/scheme-mode/guix-package,
etc/snippets/scheme-mode/guix-svn-reference,
etc/snippets/text-mode/guix-commit-message-add-package,
etc/snippets/text-mode/guix-commit-message-update-package: New files.
* doc/contributing.texi (The Perfect Setup): Document snippets.
</span></span></td><td>Ricardo Wurmus</td></tr>