gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-48)升级gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)

VanceKing

于 2015-08-22 10:53:33 发布

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分类专栏： c++

本文链接：https://blog.youkuaiyun.com/wangchong_fly/article/details/47857561

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在将GCC从4.1.2升级到4.4.7后，遇到了多个编译错误。首先，修复了模板参数阴影问题，将'const int step'更改为'const int _step'。其次，由于<stdio.h>未被包含，导致'FILE'，'fp'，'fopen'，'fread'和'fclose'未声明。添加#include <stdio.h>解决了这个问题。最后，在QuestEvent.cpp中，修正了精度丢失的类型转换错误，用新的表达式替换原来的strncpy参数。这些修改解决了升级GCC后出现的编译冲突。

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1.
../base/zAStar.h:167: error: declaration of 'const int step'

../base/zAStar.h:16: error: shadows template parm 'int step'

原代码：

virtual bool move(const int direct,const int step = step) = 0;

修改后

virtual bool move(const int direct,const int _step = step) = 0;

LoadMap.cpp:16: error: 'FILE' was not declared in this scope
LoadMap.cpp:16: error: 'fp' was not declared in this scope
LoadMap.cpp:16: error: 'fopen' was not declared in this scope
LoadMap.cpp:18: error: 'fread' was not declared in this scope
LoadMap.cpp:32: error: 'fclose' was not declared in this scope

添加头文件 #include <stdio.h>

QuestEvent.cpp: In member function 'void EventManager<E>::get_valid_quest_str(SceneUser&) [with E = EventTrigger2<Trigger::Visit>]':
QuestEvent.cpp:634: error: cast from 'char (*)[0]' to 'DWORD' loses precision
QuestEvent.cpp:634: error: cast from 'Cmd::stRetValidQuestUserCmd*' to 'DWORD' loses precision
QuestEvent.cpp:636: error: cast from 'char (*)[0]' to 'DWORD' loses precision
QuestEvent.cpp:636: error: cast from 'Cmd::stRetValidQuestUserCmd*' to 'DWORD' loses precision

修改前

strncpy(cmd->content, menu.str().c_str(), sizeof(buf)-(DWORD)((DWORD)(&(cmd->content))-(DWORD)cmd));

修改后

strncpy(cmd->content, menu.str().c_str(), sizeof(buf)-sizeof(Cmd::stRetValidQuestUserCmd)-1);