Eclipse C++ for Mac unresolved errors

eclipsemacos

I've recently downloaded Eclipse C++ for Mac.

I've just opened up a basic project however the library <iostream> gives an error "unresolved inclusion: <iostream>" and also I get the same errors with 'cout', 'endl' as well.

I have searched it up before coming here and people were talking about tool chain and etc but none of them worked out for me. I would like if someone could give me the basic steps to workout this problem.

Best Answer

You need to locate the iostream.h file. Try this:

In your Eclipse's project, go to Properties > C/C++ General > Paths and Symbols, and select the "Includes" tab. Select "GNU C++" in the Language list and click "Add" to include a directory. Now, browse for C++ sources: on Mac, these should be locate in /usr/include/c++.

Hope this helps.

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The three most influential factors for Eclipse speed are:

Using the latest version of Eclipse (2020-06 as on 26 June 2020)
Note that David Balažic's comment (July 2014) contradicts that criteria which was working six years ago:

The "same" workspace in Indigo (3.7.2) SR2 loads in 4 seconds, in Kepler SR2 (4.3.2) in 7 seconds and in Luna (4.4.0) in 10 seconds. All are Java EE bundles. Newer versions have more bundled plugins, but still the trend is obvious. (by "same" workspace I mean: same (additionally installed) plugins used, same projects checked out from version control).

Launching it with the latest JDK (Java 14 at the time of writing, which does not prevent you to compile in your Eclipse project with any other JDK you want: 1.4.2, 1.5, 1.6 older...)
```
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```
Configuring the eclipse.ini (see this question for a complete eclipse.ini)
```
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```

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Note:

Referring to the jvm.dll has advantages:

Splash screen coming up sooner.
Eclipse.exe in the process list instead of java.exe.
Firewalls: Eclipse wants access to the Internet instead of Java.
Window management branding issues, especially on Windows and Mac.

Dec. 2020, Udo conforms in the comments

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In my experience it started a lot faster with each new version.
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Since the change to Java 11 as the minimum runtime version starting from Eclipse version 2020-09 at least the core system uses the newer features of the JVM. It is up to the providers of the other plug-ins to upgrade to newer APIs and to use the full power of modern CPUs (e.g. concurrent programming model).

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Eclipse is defaulting to Java 1.5 and you have classes implementing interface methods (which in Java 1.6 can be annotated with @Override, but in Java 1.5 can only be applied to methods overriding a superclass method).

Go to your project/IDE preferences and set the Java compiler level to 1.6 and also make sure you select JRE 1.6 to execute your program from Eclipse.

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