wxWidgets的Hello World示例不编译

Question

我努力学习wxWidgets框架，我被分配到其上已经使用库中的项目。我使用它在树莓派，

已经使用sudo apt-get install libwxgtk2.8-dev libwxgtk2.8-dbg安装它。

我发现wxWidgets的网站上this教程贴入我的皮称为HELLO.CPP文件。

然后我跑g++ hello.cpp -o hello WX-配置--cxxflags --libs`，我得到了下面的巨大错误消息：

 
gcc hello.cpp -o hello `wx-config --cxxflags --libs` 
hello.cpp:20:27: error: ISO C++ forbids declaration of ‘wxDECLARE_EVENT_TABLE’ with no type [-fpermissive] 
hello.cpp:27:5: error: expected constructor, destructor, or type conversion before ‘wxEventTableEntry’ 
hello.cpp: In member function ‘virtual bool MyApp::OnInit()’: 
hello.cpp:34:84: error: conversion from ‘const char [12]’ to ‘const wxString’ is ambiguous 
hello.cpp:34:84: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [12]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [12]’ to ‘int’ 
hello.cpp:15:5: error: initializing argument 1 of ‘MyFrame::MyFrame(const wxString&, const wxPoint&, const wxSize&)’ 
hello.cpp: In constructor ‘MyFrame::MyFrame(const wxString&, const wxPoint&, const wxSize&)’: 
hello.cpp:43:74: error: conversion from ‘const char [17]’ to ‘const wxString’ is ambiguous 
hello.cpp:43:74: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘int’ 
/usr/include/wx-2.8/wx/menu.h:62:17: error: initializing argument 2 of ‘wxMenuItem* wxMenuBase::Append(int, const wxString&, const wxString&, wxItemKind)’ 
hello.cpp:49:40: error: conversion from ‘const char [6]’ to ‘const wxString’ is ambiguous 
hello.cpp:49:40: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘int’ 
/usr/include/wx-2.8/wx/menu.h:62:17: error: initializing argument 2 of ‘wxMenuItem* wxMenuBase::Append(int, const wxString&, const wxString&, wxItemKind)’ 
hello.cpp:49:40: error: conversion from ‘const char [6]’ to ‘const wxString’ is ambiguous 
hello.cpp:49:40: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
hello.cpp:20:27: error: ISO C++ forbids declaration of ‘wxDECLARE_EVENT_TABLE’ with no type [-fpermissive] 
hello.cpp:27:5: error: expected constructor, destructor, or type conversion before ‘wxEventTableEntry’ 
hello.cpp: In member function ‘virtual bool MyApp::OnInit()’: 
hello.cpp:34:84: error: conversion from ‘const char [12]’ to ‘const wxString’ is ambiguous 
hello.cpp:34:84: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [12]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [12]’ to ‘int’ 
hello.cpp:15:5: error: initializing argument 1 of ‘MyFrame::MyFrame(const wxString&, const wxPoint&, const wxSize&)’ 
hello.cpp: In constructor ‘MyFrame::MyFrame(const wxString&, const wxPoint&, const wxSize&)’: 
hello.cpp:43:74: error: conversion from ‘const char [17]’ to ‘const wxString’ is ambiguous 
hello.cpp:43:74: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [17]’ to ‘int’ 
/usr/include/wx-2.8/wx/menu.h:62:17: error: initializing argument 2 of ‘wxMenuItem* wxMenuBase::Append(int, const wxString&, const wxString&, wxItemKind)’ 
hello.cpp:49:40: error: conversion from ‘const char [6]’ to ‘const wxString’ is ambiguous 
hello.cpp:49:40: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [6]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [6]’ to ‘int’ 
/usr/include/wx-2.8/wx/gtk/menu.h:27:18: error: initializing argument 2 of ‘virtual bool wxMenuBar::Append(wxMenu*, const wxString&)’ 
hello.cpp:50:40: error: conversion from ‘const char [6]’ to ‘const wxString’ is ambiguous 
hello.cpp:50:40: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [6]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [6]’ to ‘int’ 
/usr/include/wx-2.8/wx/gtk/menu.h:27:18: error: initializing argument 2 of ‘virtual bool wxMenuBar::Append(wxMenu*, const wxString&)’ 
hello.cpp:53:44: error: conversion from ‘const char [22]’ to ‘const wxString’ is ambiguous 
hello.cpp:53:44: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [22]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [22]’ to ‘int’ 
/usr/include/wx-2.8/wx/frame.h:110:18: error: initializing argument 1 of ‘virtual void wxFrameBase::SetStatusText(const wxString&, int)’ 
hello.cpp: In member function ‘void MyFrame::OnAbout(wxCommandEvent&)’: 
hello.cpp:62:66: error: conversion from ‘const char [40]’ to ‘const wxString’ is ambiguous 
hello.cpp:62:66: note: candidates are: 
/usr/include/wx-2.8/wx/string.h:692:3: note: wxString::wxString(wxChar, size_t) 
/usr/include/wx-2.8/wx/string.h:692:3: note: no known conversion for argument 1 from ‘const char [40]’ to ‘wxChar {aka wchar_t}’ 
/usr/include/wx-2.8/wx/string.h:682:3: note: wxString::wxString(int) 
/usr/include/wx-2.8/wx/string.h:682:3: note: no known conversion for argument 1 from ‘const char [40]’ to ‘int’ 
/usr/include/wx-2.8/wx/msgdlg.h:70:17: error: initializing argument 1 of ‘int wxMessageBox(const wxString&, const wxString&, long int, wxWindow*, int, int)’ 
hello.cpp: In member function ‘void MyFrame::OnHello(wxCommandEvent&)’: 
hello.cpp:66:47: error: cannot convert ‘const char*’ to ‘const wxChar* {aka const wchar_t*}’ for argument ‘1’ to ‘void wxLogMessage(const wxChar*, ...)’ 

似乎从周围种char*转换为wxString类型的问题。有什么办法可以解决这个问题吗？看起来很奇怪，一个正式的例子会出现所有这些错误，我能正确编译它吗？

Answer 1

您链接到wxwidgets的trunk版本的文档。在wxstring中，从2.8到3.0有一些变化。

见http://docs.wxwidgets.org/trunk/overview_changes_since28.html

所以我建议你使用此页面为 “Hello World” 的PROGRAMM。 http://docs.wxwidgets.org/2.8.12/wx_helloworld.html#helloworld

我建议你也使用“g ++”而不是“gcc”。 g ++自动链接到libstdC++。 What is the difference between g++ and gcc?