Question

我正在尝试在Linux上编译http://sourceforge.net/projects/desr/files/Release/desr-0.9.tgz/download的文件。

当我运行./configure时，一切顺利，直到我输入make。然后我收到以下错误：

In file included from ./string.h:33,
                 from HtmlTokenizer.cpp:24:
/usr/include/c++/4.4/cstring:76: error: ‘::memchr’ has not been declared
/usr/include/c++/4.4/cstring:77: error: ‘::memcmp’ has not been declared
/usr/include/c++/4.4/cstring:78: error: ‘::memcpy’ has not been declared
/usr/include/c++/4.4/cstring:79: error: ‘::memmove’ has not been declared
/usr/include/c++/4.4/cstring:80: error: ‘::memset’ has not been declared
/usr/include/c++/4.4/cstring:81: error: ‘::strcat’ has not been declared
/usr/include/c++/4.4/cstring:82: error: ‘::strcmp’ has not been declared
/usr/include/c++/4.4/cstring:83: error: ‘::strcoll’ has not been declared
/usr/include/c++/4.4/cstring:84: error: ‘::strcpy’ has not been declared
/usr/include/c++/4.4/cstring:85: error: ‘::strcspn’ has not been declared
/usr/include/c++/4.4/cstring:86: error: ‘::strerror’ has not been declared
/usr/include/c++/4.4/cstring:87: error: ‘::strlen’ has not been declared
/usr/include/c++/4.4/cstring:88: error: ‘::strncat’ has not been declared
/usr/include/c++/4.4/cstring:89: error: ‘::strncmp’ has not been declared
/usr/include/c++/4.4/cstring:90: error: ‘::strncpy’ has not been declared
/usr/include/c++/4.4/cstring:91: error: ‘::strspn’ has not been declared
/usr/include/c++/4.4/cstring:92: error: ‘::strtok’ has not been declared
/usr/include/c++/4.4/cstring:93: error: ‘::strxfrm’ has not been declared
/usr/include/c++/4.4/cstring:94: error: ‘::strchr’ has not been declared
/usr/include/c++/4.4/cstring:95: error: ‘::strpbrk’ has not been declared
/usr/include/c++/4.4/cstring:96: error: ‘::strrchr’ has not been declared
/usr/include/c++/4.4/cstring:97: error: ‘::strstr’ has not been declared

任何想法可能是什么问题？

这是g ++ --version：

g++ (Ubuntu 4.4.3-4ubuntu5.1) 4.4.3
Copyright (C) 2009 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Answer 1

当有

时

 #include <cstring>

g ++编译器应该将它自己包含的声明放入std :: AND全局命名空间。它寻找某种原因，好像它没有这样做。尝试用std :: strcpy替换一个strcpy实例。

Answer 2

我遇到了类似的问题。在我的例子中，头文件包含的顺序如下

#include <string> // for string class
#include <cstring> // for memcpy()

有了这个，我遇到了你用gcc 4.6.3提到的上述错误。

切换包含工作的顺序..

Answer 3

此问题的一个可能原因是您已设法在命名空间块内的某处获得 #include <cstring>。

这会导致为包含保护设置 #define，阻止您在其他任何地方重新导入它，但同时将所有符号加载到您的命名空间中，而不是加载到它们所属的全局范围中。

当我试图将内联模板定义与它们的声明放在一个单独的文件中时，我有时会犯这个错误。

如何在编译C ++代码时修复一些版本控制问题？

3 个答案: