ROS2 foxy, colcon build error

[adijams01]

using
ubuntu 20.04
ROS2 foxy
installed all dependicies with foxy

sudo apt install ros-<ros2-version>-perception-pcl \
  	   ros-<ros2-version>-pcl-msgs \
  	   ros-<ros2-version>-vision-opencv \
  	   ros-<ros2-version>-xacro

sudo add-apt-repository ppa:borglab/gtsam-release-4.1
sudo apt install libgtsam-dev libgtsam-unstable-dev

while doing colcon build

Starting >>> lio_sam 
--- stderr: lio_sam                         
CMake Error at CMakeLists.txt:10 (find_package):
  By not providing "Findament_cmake.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "ament_cmake", but CMake did not find one.

  Could not find a package configuration file provided by "ament_cmake" with
  any of the following names:

    ament_cmakeConfig.cmake
    ament_cmake-config.cmake

  Add the installation prefix of "ament_cmake" to CMAKE_PREFIX_PATH or set
  "ament_cmake_DIR" to a directory containing one of the above files.  If
  "ament_cmake" provides a separate development package or SDK, be sure it
  has been installed.


---
Failed   <<< lio_sam [0.61s, exited with code 1]

Summary: 0 packages finished [2.62s]
  1 package failed: lio_sam
  1 package had stderr output: lio_sam

[rehanTUNI]

using ubuntu 20.04 ROS2 foxy installed all dependicies with foxy

sudo apt install ros-<ros2-version>-perception-pcl \
  	   ros-<ros2-version>-pcl-msgs \
  	   ros-<ros2-version>-vision-opencv \
  	   ros-<ros2-version>-xacro

sudo add-apt-repository ppa:borglab/gtsam-release-4.1
sudo apt install libgtsam-dev libgtsam-unstable-dev

while doing colcon build

Starting >>> lio_sam 
--- stderr: lio_sam                         
CMake Error at CMakeLists.txt:10 (find_package):
  By not providing "Findament_cmake.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "ament_cmake", but CMake did not find one.

  Could not find a package configuration file provided by "ament_cmake" with
  any of the following names:

    ament_cmakeConfig.cmake
    ament_cmake-config.cmake

  Add the installation prefix of "ament_cmake" to CMAKE_PREFIX_PATH or set
  "ament_cmake_DIR" to a directory containing one of the above files.  If
  "ament_cmake" provides a separate development package or SDK, be sure it
  has been installed.


---
Failed   <<< lio_sam [0.61s, exited with code 1]

Summary: 0 packages finished [2.62s]
  1 package failed: lio_sam
  1 package had stderr output: lio_sam

I believe you forgot to source your ros2 environment. Moreover, replace with your ros2 distribution

[adijams01]

Thanks for your input,
Ig I did forgot to replace with foxy.
Anyways I shifted with the ROS1 branch and it worked.
Will try with the ROS2 branch soon.