Eclipse编译成功但仍然会产生语义错误 [英] Eclipse compiles successfully but still gives semantic errors

问题描述

注意：这显然是StackOverflow的一个常见问题，但是 - 对于我所看到的 - 人们永远都不会找到一种方式，或者他们的解决方案对我来说不起作用。

问题：

我正在使用Eclipse Juno ADT。一切都正常，直到我尝试更新NDK。我通过新版本替换了我的 ndk 文件夹（即 ndk-r8d ）（即 ndk-r8e ），在我的路径和符号配置中，我将包含从g ++ 4.6更改为4.7。

似乎打破了我的索引：我可以编译我的代码，但是Eclipse发出语义错误，就像在[ 1 ]和[错误主要来自OpenCV4Android使用的符号，例如距离， pt ， queryIdx 和 trainIdx 。

当我尝试备份到我的旧配置时，索引仍然损坏！我没有办法改变这个。

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我尝试过的

• 清理项目


• 在索引子菜单中重建，刷新和所有其他选项（当右键单击时）项目）


• 在首选项中禁用/启用索引器


• 验证符号，如 trainIdx 只出现在我的OpenCV4Android包含在路径和符号部分。


• 更改我的包含在路径和符号部分。我基本上试图将OpenCV包含在开头和结尾。

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一些意见

什么是不工作

我认为它是 CDT索引因为以下原因：

• 在命令行中，我可以使用 ndk-build clean 和 ndk-build 。


• 当我启动Eclipse时，我没有任何错误，直到我打开一个C ++文件从 jni 文件夹）。


• 我可以随时构建项目，但只要我打开了一个C ++文件，我可以由于很多 Field'< name>'无法解析，所以不再运行应用程序。


• 如果我不要打开C ++文件，Eclipse不会报告任何错误，可以成功构建和部署Android应用程序。

有趣的事实

以下代码报告错误行， queryIdx ， pt ：

  cv :: line（mRgb，keypointsA [matches [i] .queryIdx] .pt，keypointsB [matches [i] .trainIdx] .pt，cv :: Scalar（255，0，0，255），1，8，0 ）; 
  

如果我写如下，它的作品：

  cv :: DMatch tmpMatch = matches [i]; 
 cv :: KeyPoint queryKp = keypointsA [tmpMatch.queryIdx]; 
 cv :: KeyPoint trainKp =关键点B [tmpMatch.trainIdx]; 
 cv :: line（mRgb，queryKp.pt，trainKp.pt，cv :: Scalar（255，0，0，255），1，8，0）; 
  

这不是所有的OpenCV功能都未解决：只有 pt ， queryIdx 和 trainIdx 是。

解决方案

在Eclipse环境中选择的项目首选项中，转到C / C ++一般 - >代码分析 - >启动。确保两个复选框未选中。关闭并重新打开项目或重新启动eclipse并重建项目。

NOTE: it apparently is a recurrent question on StackOverflow, but - for what I have seen - either people never find a way or their solution does not work for me

The problem:

I am using Eclipse Juno ADT. Everything was working fine until I tried to update the NDK. I replaced my ndk folder (that was the ndk-r8d) by the new version (i.e. ndk-r8e) and, in my Paths and Symbols configuration, I changed the includes to go from g++ 4.6 to 4.7.

It seemed to break my index: I could compile my code, but Eclipse was giving semantic errors, exactly like in [1] and [2]. The errors mainly come from symbol used by OpenCV4Android, such as distance, pt, queryIdx and trainIdx.

When I tried to backup to my old configuration, the index was still broken! I cannot find a way to change this.

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What I have tried

• Clean up the project
• Rebuild, refresh, and all the other options in the "Index" submenu (when "right-clicking" on the project)
• Disable / enable the indexer in the preferences
• Verify that symbols such as trainIdx only appear in my OpenCV4Android include in the Paths and Symbols section.
• Change the order of my includes in the Paths and Symbols section. I basically tried to put the OpenCV include in the beginning and in the end.

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Some observations

What is not working

I assume that it is the CDT index because of the following:

• In command line, I can build my project using ndk-build clean and ndk-build.
• When I start Eclipse, I have no error until I open a C++ file (from the jni folder).
• I can always build the project, but as long as I have opened a C++ file, I can't run the application anymore because of a lot of Field '<name>' could not be resolved.
• If I don't open the C++ files, Eclipse doesn't report any error and can build and deploy the Android application successfully.

Interesting fact

The following code reports errors on line, queryIdx, pt:

cv::line(mRgb, keypointsA[matches[i].queryIdx].pt, keypointsB[matches[i].trainIdx].pt, cv::Scalar(255, 0, 0, 255), 1, 8, 0);

If I write it as follows, it works:

cv::DMatch tmpMatch = matches[i];
cv::KeyPoint queryKp = keypointsA[tmpMatch.queryIdx];
cv::KeyPoint trainKp = keypointsB[tmpMatch.trainIdx];
cv::line(mRgb, queryKp.pt, trainKp.pt, cv::Scalar(255, 0, 0, 255), 1, 8, 0);

It is not that all of the OpenCV functions are unresolved: only pt, queryIdx and trainIdx are.

Any comment will be really appreciated.

解决方案

In your selected project preferences within the Eclipse environment, go to C/C++ General -> Code Analysis -> Launching. Make sure that both check boxes are unchecked. Close and reopen the project or restart eclipse and rebuild the project.

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