[英]wxWidgets Hello World example not compiling
我正在嘗試學習wxWidgets
框架,因為我被分配到一個已經使用該庫的項目上工作。
我在 Raspberry Pi 上使用它,使用sudo apt-get install libwxgtk2.8-dev libwxgtk2.8-dbg
安裝它。
我在 wxWidgets 網站上找到了這個教程,並將其粘貼到我的 Pi 上一個名為 hello.cpp 的文件中。
然后我運行g++ hello.cpp -o hello
wx-config --cxxflags --libs` 並且我收到以下巨大的錯誤消息:
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*, ...)’
似乎是從char*
類型轉換為wxString
類型的問題。 有沒有辦法解決這個問題? 官方示例會出現所有這些錯誤似乎很奇怪,我是否正確編譯了它?
你鏈接到wxwidgets的trunk版本的文檔。 在 wxstring 中,從 2.8 到 3.0 有一些變化。
見http://docs.wxwidgets.org/trunk/overview_changes_since28.html
因此,我建議您將此頁面用於“Hello World”程序。 http://docs.wxwidgets.org/2.8.12/wx_helloworld.html#helloworld
我也建議您使用“g++”而不是“gcc”。 g++ 自動鏈接到 libstdc++。 g++ 和 gcc 有什么區別?
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