How do I enable C 11 support in the Eclipse CDT indexer?

Enabling C 11 Support in Eclipse CDT Indexer

The Eclipse CDT indexer, responsible for identifying errors prior to compilation, requires specific settings to support the C 11 standard. This article explores the steps to enable C 11 support in Eclipse CDT for Juno, Kepler, and Luna versions.

Indexer Configuration

To modify the Eclipse indexer settings:

1. Navigate to "Project properties -> C/C General -> Preprocessor Include Paths, Macros etc."
2. Under the "Providers" tab, select "CDT GCC Built-in Compiler Settings."
3. In the "Command to get compiler specs" field, append "-std=c 0x" or "-std=c 11."

After these modifications, the field should resemble the following:

${COMMAND} -E -P -v -dD ${INPUTS} -std=c++0x

Sources and Related Information

• [Eclipse CDT FAQ](http://wiki.eclipse.org/CDT/User/FAQ#CDT_does_not_recognize_C.2B.2B11_features)
• [Eclipse Forum Discussion](http://www.eclipse.org/forums/index.php/mv/msg/373462/909018/#msg_909018)

Additional Considerations

Note that this process only affects the Eclipse indexer and not the C compiler settings. If compilation fails due to missing C 11 settings, refer to the following resources:

• [Eclipse CDT C 11/C 0x Support](https://www.eclipse.org/forums/index.php/mv/msg/403123/923927/#msg_923927)
• [C 11 Compiler Enablement (Kepler and Before)](https://stackoverflow.com/a/17499266/760746)
• [C 11 Compiler Enablement (Kepler and Newer)](https://stackoverflow.com/a/22480299/760746)

Compatibility

These configurations have been successfully tested with Eclipse versions:

• Kepler (CDT 8.2)
• Luna (CDT 8.4)

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