Eclipse c++11 support. how to.

http://stackoverflow.com/questions/32642375/eclipse-cdt-indexer-does-not-fully-recognize-c11

1.
Go to Project->properties->C/C++ General->Preprocessor Include Paths.    Click the Providers tab.
    Click CDT GCC Built-in Compiler settings
    Click Move Up button on the right.
    Under Language Settings Provider Options
        Click off Use Global provider shared between projects
        Add -std=c++1y to the end of the command line in Command to get compiler specs.

Step 2 gets the compiler working

    Go to Project->properties->C/C++ Build->Settings.
    Go to Tool Settings tab.
    Expand GCC C++ Compiler
    Click Dialect Pick the C++ Standard you wish to target from the Language Standard drop-down.

2. (if needed)
    add under Project > Properties > C/C++ Build > Settings then on the Tool Settings tab GCC C++ Compiler > Miscellaneous the -std=c++11 flag,

    then under Window > Preferences > C/C++ > Build > Settings on the Discovery tab chose CDT GCC Built-in Compiler Settings and add the -std=c++11 flag to Command to get compiler specs. On my machine it looks like this after the change:

    ${COMMAND} -E -P -v -dD -std=c++11 "${INPUTS}"

    clean and rebuild both your project and your index (Project > C/C++ Index > Rebuild) as Eclipse tends to cache error messages and show them even though they are gone after changing the settings.