为什么安装kannel make 时显示Error 1？

Question

我正在尝试在 Ubuntu 服务器 18.04 上安装 kannel，当我执行此命令时：

make

它开始做事（我是初学者）但最后它显示：

y.tab.c:350:5: error: conflicting types for ‘ws_yy_parse’
In file included from wmlscript/wsgram.y:15:0:
./wmlscript/wsint.h:296:5: note: previous declaration of ‘ws_yy_parse’ was here
 int ws_yy_parse(void *context);
     ^~~~~~~~~~~
wmlscript/wsgram.c:63:25: error: conflicting types for ‘ws_yy_parse’
 #define yyparse         ws_yy_parse
                         ^
y.tab.c:1510:1: note: in expansion of macro ‘yyparse’
In file included from wmlscript/wsgram.y:15:0:
./wmlscript/wsint.h:296:5: note: previous declaration of ‘ws_yy_parse’ was here
 int ws_yy_parse(void *context);
     ^~~~~~~~~~~
wmlscript/wsgram.y: In function ‘ws_yy_parse’:
wmlscript/wsgram.y:122:23: error: ‘pctx’ undeclared (first use in this function); did you mean ‘puts’?
   { ws_error_syntax(pctx, @1.first_line); }
                       ^~~~
                       puts
wmlscript/wsgram.y:122:23: note: each undeclared identifier is reported only once for each function it appears in
Makefile:225: recipe for target 'wmlscript/wsgram.o' failed
make: *** [wmlscript/wsgram.o] Error 1

我需要帮助

我正在关注本教程：text