如何摆脱属性网格警告？答案

【问题标题】：How to get rid of the property grid warnings?如何摆脱属性网格警告？
【发布时间】：2016-12-21 14:09:15
【问题描述】：

我总是收到以下警告： https://gist.githubusercontent.com/jS5t3r/ccb8a6e3db18d5133d37986b8979baef/raw/f4750f5ac3211b0560d27b035d31542877669e07/warnings

我正在使用

ArchLinux
gcc (GCC) 6.2.1 20160830
wxwidget 3.0

我使用这些标志进行编译

WXWIDGETSFLAGS=`wx-config --gl-libs --cxxflags --libs std stc propgrid richtext`

警告：

g++ `wx-config --gl-libs --cxxflags --libs std stc propgrid richtext`  -std=c++11 -Wall -Iinclude  source/wxwidget/GUIMemLayMgr.h source/wxwidget/gui.h source/wxwidget/GUIMemLayMgr.cpp source/wxwidget/gui.cpp  source/wxwidget/main.cpp -o output/wxwidget
In file included from /usr/include/wx-3.0/wx/propgrid/propgrid.h:26:0,
             from source/wxwidget/gui.h:31,
             from source/wxwidget/GUIMemLayMgr.h:9:
/usr/include/wx-3.0/wx/propgrid/property.h: In member function 'void  wxPGChoices::Set(const wxArrayString&, const wxArrayInt&)':
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
     if ( &values )
                  ^
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
In file included from /usr/include/wx-3.0/wx/propgrid/propgrid.h:26:0,
             from source/wxwidget/gui.h:31:
/usr/include/wx-3.0/wx/propgrid/property.h: In member function 'void wxPGChoices::Set(const wxArrayString&, const wxArrayInt&)':
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
     if ( &values )
                  ^
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
In file included from /usr/include/wx-3.0/wx/propgrid/propgrid.h:26:0,
             from source/wxwidget/gui.h:31,
             from source/wxwidget/GUIMemLayMgr.h:9,
             from source/wxwidget/GUIMemLayMgr.cpp:1:
/usr/include/wx-3.0/wx/propgrid/property.h: In member function 'void wxPGChoices::Set(const wxArrayString&, const wxArrayInt&)':
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler  can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
     if ( &values )
                  ^
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
In file included from /usr/include/wx-3.0/wx/propgrid/propgrid.h:26:0,
             from source/wxwidget/gui.h:31,
             from source/wxwidget/gui.cpp:8:
/usr/include/wx-3.0/wx/propgrid/property.h: In member function 'void   wxPGChoices::Set(const wxArrayString&, const wxArrayInt&)':
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the  compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
     if ( &values )
                  ^
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
In file included from /usr/include/wx-3.0/wx/propgrid/propgrid.h:26:0,
             from source/wxwidget/gui.h:31,
             from source/wxwidget/main.cpp:22:
/usr/include/wx-3.0/wx/propgrid/property.h: In member function 'void wxPGChoices::Set(const wxArrayString&, const wxArrayInt&)':
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]
     if ( &values )
                  ^
/usr/include/wx-3.0/wx/propgrid/property.h:1049:22: warning: the compiler can assume that the address of 'values' will always evaluate to 'true' [-Waddress]

【问题讨论】：

不看代码很难说什么。但是它只是一个警告，如果程序运行正常，您可以忽略。
您确实应该在问题中包含错误消息，而不是依赖外部链接。
@Igor 我不会忽略警告。

标签： compiler-errors g++ wxwidgets compiler-warnings

【解决方案1】：

这是在Optimize wxPGChoices::Set method 提交中修复的，它在3.0.2 之后。要使用它，您需要从 git 或 3.1.0 版本获取最新的 3.0 分支 - 基本上是提交之后的任何内容。

【讨论】：

wx-config --version 3.0.2 这个版本我用的。
简短的回答是“使用3.1.0”。

【解决方案2】：

我将包含从

#include <wx/propgrid/propgrid.h>

到

#include <wx-3.0/wx/propgrid/propgrid.h>

现在一切正常。

【讨论】：

这听起来不像是一个正确的方法。改头文件，但不使用新头文件对应的源文件是不行的。
除了前面的评论说的，这并不能真正改变什么……
@catalin 我想，如果我使用，我会使用 3.0.2 之前的 wxwidget 版本。有了这个 hack hack，我正在使用 3.0.2。我该如何解决？