Sample application creation C++ support configuration

[hiteshk014]

Hi,

We copied sample application from one machine to other and added the project in explorer in vscode

this project was having C++ functionalities 

these C++ configurations (attached in screenshots ) were enabled in the machine where this project was created

Settings which were enabled:

1. C++ support for the application (Image 1)

2. Link with STD C++ library (Image 1)

3. Enabling Newlib C library (Image 2)

after copying to another machine these configuration setting were not enabled,

can you please provide an input do we need to follow this experiment every time we copy this project ?

Thank you

[Einar Thorsrud]

Hi,

after copying to another machine these configuration setting were not enabled,

can you please provide an input do we need to follow this experiment every time we copy this project ?

When you use menuconfig/guiconfig the changes are done within the build folder. To make persistent changes you need to do this in prj.conf instead. That is, simply set the configurations in prj.conf instead, or alternatively copy there after first experimenting with setting them in menuconfig/guiconfig.

[hiteshk014]

Hi,

Can you please elaborate more in this workaround ?

prj.conf is empty

7711.Sample.7z

[Einar Thorsrud]

Hi,

hiteshk014 said:

Can you please elaborate more in this workaround ?

Yes. What I describe is not a workaround, but how this is intended to be used. When you modify the configuration using guiconfig you change configurations within the build folder. So when you delete the build folder (for instance when using a pristine build), the changes there is lost. The correct location to make persistent configurations is in the prj.conf. Any change you experiment with or find using guiconfig and want to use, you should add in prj.conf. For instance, to enable C++ support add this line to your prj.conf:

CONFIG_CPLUSPLUS=y

See Changing the configuration permanently for details.

[hiteshk014]

Hi,

We modified all the 3 below configuration in Guiconfig

1. C++ support for the application (Image 1)

2. Link with STD C++ library (Image 1)

3. Enabling Newlib C library (Image 2)

want to know by just adding CONFIG_CPLUSPLUS=y in prj.conf does it serves permanent setting for all the above 3 changes in project ?

Thank you.

[Einar Thorsrud]

hiteshk014 said:

want to know by just adding CONFIG_CPLUSPLUS=y in prj.conf does it serves permanent setting for all the above 3 changes in project ?

No, you must add all your changes in prj.conf. So for 3. you need to set CONFIG_NEWLIB_LIBC=y, etc. By the way, a good way to see all the configurations it to search in All Configuration Options.