Building Examples only

[abdelrahmanhussein]

Required Info
Camera Model	D435
Firmware Version	5.10.13
Operating System & Version	Ubuntu 16.04
Kernel Version (Linux Only)	4.15.0-42-generic
Platform	PC
SDK Version	2.17.0
Language	C
Segment	others

Issue Description

Hi,

I have successfully installed the realsense-viewer. I have also successfully build the libsense-2 and was able to run the examples. Everything works fine!

My question is regarding building examples independently without having to building the whole library again. Assume that I modified the source code of an example to do different functionality, do I have to go through the whole flow of CMaking and building the whole library again? Or there is a way in which I can just compile the example source code after modifying it?

After installing everything, I tried to run CMake for rs-depth example by carrying out the following steps:

1. go to the directory "/librealsense-master/examples/C/depth"
2. Create a new directory called "build" and then cd build
3. Run the command cmake ../ -DBUILD_EXAMPLES=true

doing this, I got the following output

-- The C compiler identification is GNU 5.5.0
-- The CXX compiler identification is GNU 5.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at CMakeLists.txt:15 (install):
install TARGETS given no RUNTIME DESTINATION for executable target
"rs-depth".

-- Configuring incomplete, errors occurred!

So, what was wrong about what I did? And how to build the example alone?

[dorodnic]

Hi @abdelrahmanhussein
After the initial cmake .. and make, you can modify the examples and just run make again in the build folder. This will only build what changed, and not rebuild the SDK.

[jacksonkr]

Do I edit the CMake files directly in order to chose the examples I want built? Also, what if the examples I need require something like the aforementioned rs-depth?

[milan-r-shah]

Hi @abdelrahmanhussein
After the initial cmake .. and make, you can modify the examples and just run make again in the build folder. This will only build what changed, and not rebuild the SDK.

So, to confirm, by "just run make again in the build folder", you meant run make in librealsense/build/ directory or in librealsense/build/examples/<example>/ ?