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Bug 332522

Summary: c++0x mode autodetection.
Product: [Tools] CDT Reporter: German <germandiago>
Component: cdt-buildAssignee: cdt-build-inbox <cdt-build-inbox>
Status: CLOSED DUPLICATE QA Contact: Andrew Gvozdev <angvoz.dev>
Severity: minor    
Priority: P3 CC: cdtdoug, hering.cheng, notifications+eclipse.org
Version: 8.0   
Target Milestone: ---   
Hardware: PC   
OS: Linux   
Whiteboard:

Description German CLA 2010-12-14 09:08:32 EST 
Build Identifier: I20101208-1300

When I create a project, I always have to configure my project so that it detects c++0x completion and so on.
It would be nice to have some kind of detection or project option with c++0x enabled by default, since __GXX_EXPERIMENTAL_CXX0X__ has to be defined for gcc in paths and symbols in order to get completion working, besides defining the -std=c++0x flag.

Reproducible: Always

Steps to Reproduce:
1. Create new project
2. Add to Miscellaneous C++ compiler flags "-std=c++0x"
3. Even with that flag, c++0x headers such as std::array and forward_list don't work.
Comment 1 Hering Cheng CLA 2012-06-06 11:44:29 EDT 
Is there any plan on making this happen soon?  I am using CDT 8.1.0.201205261005 in Eclipse Version: 4.2.0 Build id: I20120503-1800 and still have to manually add the macro in "Project -> Properties -> C/C++ General -> Preprocessor Include Paths, Macros etc. -> CDT User Setting Entries", despite having specified "-std=c++11" in "Project -> Properties -> C/C++ Settings -> GCC C++ Compiler -> Miscellaneous".  I am using g++ 4.7.0.  Am I missing something?
Comment 2 Andrew Gvozdev CLA 2012-06-06 12:10:02 EDT 
If you use language settings providers (as evidenced by reference to "Preprocessor Include Paths, Macros etc.") you can add the flag to built-in specs detector.  On that property page select [Providers] tab and "GCC Builtin Compiler Settings" (should be enabled in your project), then use link "Workspace Settings"->Discovery tab, and add "-std=c++11" to the list of options. Or you can go directly to Preferences->C/C++->Build->Settings->Discovery. That will supply c++11 mode for all projects in workspace using the provider.
Comment 3 Hering Cheng CLA 2012-06-07 09:38:38 EDT 
Thank you, Andrew.  This is an awesome hidden jewel.  Now I understand the new CDT better.
Comment 4 Andrew Gvozdev CLA 2013-07-22 01:18:44 EDT 

*** This bug has been marked as a duplicate of bug 404913 ***