Error during make default

[Deanatius]

Hello, I have issues when trying to install DroneCore on my Jetson TX1. After doing the previous steps, I proceeded to make default and it start normally.

However, when it reaches 'Linking CXX shared library libdronecore.so' this error occurs.

/usr/bin/ld: cannot find -ltinyxml2
collect2: error: ld returned 1 exit status
CMakeFiles/dronecore.dir/build.make:1056: recipe for target 'libdronecore.so' failed
make[3]: *** [libdronecore.so] Error 1
CMakeFiles/Makefile2:179: recipe for target 'CMakeFiles/dronecore.dir/all' failed
make[2]: *** [CMakeFiles/dronecore.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make[1]: *** [all] Error 2
Makefile:71: recipe for target 'default' failed
make: *** [default] Error 2

I am not sure what causes the error as I have followed the steps carefully. I have checked the DroneCore/libs directory and the tinyxml2 folder does exist.

[shakthi-prashanth-m]

Hi @Deanatius , did you build on latest develop ?

/usr/bin/ld: cannot find -ltinyxml2

This is mostly due to improper submodule update. Can you please double-check if you missed steps from building library section as summarized below:

• Clone and update the submodules of DroneCore repository:

git clone https://github.com/dronecore/DroneCore.git
cd DroneCore
git submodule update --init --recursive

• Build the (debug) C++ library:

make default

I recommend to follow these steps and let us know.
Thanks.

[Deanatius]

Hi @Deanatius , did you build on latest develop ?

Yes I am building on the latest develop.

I am following the steps and there are no error messages popping up during the submodule update.

However, when it reaches 'Linking CXX shared library libdronecore.so' this error occurs.

/usr/bin/ld: cannot find -ltinyxml2
collect2: error: ld returned 1 exit status
CMakeFiles/dronecore.dir/build.make:1056: recipe for target 'libdronecore.so' failed
make[3]: *** [libdronecore.so] Error 1
CMakeFiles/Makefile2:179: recipe for target 'CMakeFiles/dronecore.dir/all' failed
make[2]: *** [CMakeFiles/dronecore.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make[1]: *** [all] Error 2
Makefile:71: recipe for target 'default' failed
make: *** [default] Error 2

I tried to build on my PC and everything works out well but the same error persists on my TX1.

[julianoes]

@Deanatius for "native" installation (I guess the Jetson counts as native), you need to have libtinyxml2 installed.

sudo apt-get install libtinyxml2-dev

To see all dependencies, you can also check the Dockerfile, or check the docs (it's only mentioned in the developer branch).

[Deanatius]

@Deanatius for "native" installation (I guess the Jetson counts as native), you need to have libtinyxml2 installed.

sudo apt-get install libtinyxml2-dev

This did the trick! Sorry for my incompetence as I am a complete beginner in developing with Ubuntu and also with UAVs.

[julianoes]

@Deanatius no worries! Thanks for the feedback.