Fix library soname.

Index: configure
--- configure.orig
+++ configure
@@ -10,6 +10,7 @@
 prefix = '/usr/local'
 clean = True
 linktype = 'so'
+soversion = '0.0'
 
 host = platform.machine()
 host = ''.join(c for c in host if c in '_0123456789abcdefghijklmnopqrstuvwxyz')
@@ -43,6 +44,9 @@
     host = arg[7:]
     host = host.split('-')[0]
     continue
+  if arg.startswith('--soversion='):
+    soversion = arg[12:]
+    continue
   if arg == '--clean':
     clean = True
     continue
@@ -54,6 +58,7 @@
 echoargs = './configure'
 echoargs += ' --prefix=%s' % prefix
 echoargs += ' --host=%s' % host
+echoargs += ' --soversion=%s' % soversion
 if clean: echoargs += ' --clean'
 if not clean: echoargs += ' --noclean'
 print(echoargs)
@@ -222,23 +227,17 @@
   f.write('%s -shared \\\n' % firstcompiler)
   if rpath:
     f.write('  -Wl,-rpath=%s \\\n' % rpath)
-  f.write('  -Wl,-soname,libcpucycles.so.1 \\\n')
-  f.write('  -o package/lib/libcpucycles.so.1 \\\n')
+  f.write('  -Wl,-soname,libcpucycles.so.%s \\\n' % soversion)
+  f.write('  -o package/lib/libcpucycles.so.%s \\\n' % soversion)
   f.write('  "$@"\n')
-  f.write('chmod 644 package/lib/libcpucycles.so.1\n')
+  f.write('chmod 644 package/lib/libcpucycles.so.%s\n' % soversion)
 os.chmod('build/%s/scripts/sharedlib' % host,0o755)
 
-M = 'package/lib/libcpucycles.so.1: scripts/sharedlib %s\n' % ' '.join(cpucyclesofiles)
+M = 'package/lib/libcpucycles.so.$(LIBcpucycles_VERSION): scripts/sharedlib %s\n' % ' '.join(cpucyclesofiles)
 M += '\tscripts/sharedlib %s\n' % ' '.join(cpucyclesofiles)
 M += '\n'
 makefile = M + makefile
 
-M = 'package/lib/libcpucycles.so: package/lib/libcpucycles.so.1\n'
-M += '\trm -f package/lib/libcpucycles.so\n'
-M += '\tln -s libcpucycles.so.1 package/lib/libcpucycles.so\n'
-M += '\n'
-makefile = M + makefile
-
 # ----- command
 
 os.makedirs('build/%s/command'%host)
@@ -267,8 +266,8 @@
   M += '\tscripts/compiledefault command %s c -I include\n' % base
   M += '\n'
   makefile = M + makefile
-  M = 'package/bin/%s: command/%s.o%s\n' % (base,base,''.join(' package/lib/%s.%s' % (x,linktype) for x in libs))
-  M += '\tcd command && ./link bin/%s %s.o%s -lm -lrt\n' % (base,base,''.join(' lib/%s.%s' % (x,linktype) for x in libs))
+  M = 'package/bin/%s: command/%s.o%s.$(LIBcpucycles_VERSION)\n' % (base,base,''.join(' package/lib/%s.%s' % (x,linktype) for x in libs))
+  M += '\tcd command && ./link bin/%s %s.o%s.$(LIBcpucycles_VERSION) -lm -lrt\n' % (base,base,''.join(' lib/%s.%s' % (x,linktype) for x in libs))
   M += '\n'
   makefile = M + makefile
   commands += ['package/bin/%s' % base]
@@ -286,7 +285,7 @@
 
 # ----- make default
 
-M = 'default: package/lib/libcpucycles.a package/lib/libcpucycles.so package/lib/libcpucycles.so.1 \\\n'
+M = 'default: package/lib/libcpucycles.a package/lib/libcpucycles.so.$(LIBcpucycles_VERSION) \\\n'
 M += 'commands\n'
 M += '\n'
 makefile = M + makefile