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Working With Eclipse CDT
Eclipse CDT is provided by fedora packages, so simply: yum install eclipse-cdt
You can always install eclipse CDT following instructions from https://www.eclipse.org/cdt/.
Eclipse uses a Java virtual machine started with a fixed upper limit on its heap size, defined in /etc/eclipse.ini. This limit is often not large enough for indexing the OSv project. It's recommended to edit /etc/eclipse.ini and make sure the "-Xmx" setting is at least 1 GB.
After installing eclipse-cdt, you'll need to create OSv project to work with. Eclipse support some built-in project templates, but since we already have OSv downloaded from git, we do not want to have things messed up by eclipse.
So under File -> New -> Project, select C/C++ folder and than select "Makefile Project with Existing Code".
Click Next.
Give a project name and select the place where OSv code was downloaded.
You can now click Finish.
OSv has some particularities that eclipse do not understand as default, such as:
- It does have it's own libc/stdc++/libboost implementation
- Its' a Kernel
- It's c++11
- It has a lot of includes paths that preprocessor should be awere of.
Unfortunately there is no magic configuration file that address all of this, so some manual configuration is needed.
Inside OSv source code there is a script that do the work. So first you'll need to enter conf directory (you must be inside this directory because it assumes ../ is OSV_HOME) and run:
`./eclipse-cdt-config.sh > /tmp/eclipse-config.xml'
Then, under eclipse go to:
Project -> Properties -> C/C++ General -> Paths and Symbols
You'll find a button called "Import Settings..." Import the generated XML.
To use OSv provided libs and includes, and to work correctly with c++11, we need some more tweaks. So go to:
Project -> Properties -> C/C++ General -> Preprocessor Includes
Under Provides tab, select CDT GCC Built-in Compiler Settings and uncheck "Use global provider shared between projects". Use the following command:
${COMMAND} -E -P -v -dD "${INPUTS}" -std=c++11 -include /YOUR_PATH_TO_OSV_SOURCE/include/api/stdalign.h -nostdlib -nostdinc -nostdinc++
do not forget to replace YOUR_PATH_TO_OSV_SOURCE
This will prevent indexer to guess things in a wrong way:
Project -> Properties -> C/C++ General -> Indexer
Uncheck: "Index source files not included in the build" and "Allow heuristic resolution of includes'.
To make OSv's code formatter conform to OSv's coding style, go to Project -> Properties -> C/C++ General -> Formatter, Set "Enable project specific settings", choose the K&R formatter and then click on the "Edit..." button to edit the formatter, choose a new name (e.g., "OSV") and in the "Indentation" setting choose "spaces only" as a tab policy.