Fix Sympow on FreeBSD

[kcrisman]

For the current FreeBSD port, the following patch is necessary. See this sage-devel thread where it was first reported.

--- sympow-1.018.1.p11/src/disk.c-orig 2012-04-19 02:33:51.000000000 +0000
+++ sympow-1.018.1.p11/src/disk.c 2012-04-19 02:34:22.000000000 +0000
@@ -39,7 +39,7 @@
  else if (((sp&3)==0) && CM_CASE) {if (2*ep==sp) S[3]='l'; else S[3]='h';}
  else {if (2*ep==sp) S[3]='L'; else S[3]='H';}
  if (HECKE && dv) {TACKS[which]=malloc(dv*sizeof(QD)); TACKON[which]=dv;}
- else if (dv<=sp/2) TACKON[which]=0;
+ else if (dv<=sp/2) {TACKS[which]=NULL; TACKON[which]=0;}
  else {TACKS[which]=malloc((dv-sp/2)*sizeof(QD)); TACKON[which]=dv-sp/2;}
  S[4]=0; F=fopen("datafiles/param_data","r"); strcpy(U,S);
  if (ANAL_RANK) {if (dv>0) U[0]='A'; else U[0]='m';}

Presumably we would want to only apply this on FreeBSD for now. Needs an spkg.

CC: @peterjeremy

Component: porting: BSD

Reviewer: Stephen Montgomery-Smith

Issue created by migration from https://trac.sagemath.org/ticket/13144

[sagetrac-stephen]

comment:1

It is a duplicate of

#12858

I think this patch should be applied to all operating systems. I think it is just a matter of luck that other operating systems were not hit by this bug.

[kcrisman]

Changed author from Stephen Montgomery-Smith to none

[kcrisman]

Reviewer: Stephen Montgomery-Smith