在Ubuntu上安装Colcon

感谢您的帮助： 我只是想在运行ubuntu的虚拟机上安装Colcon，然后 我正在使用以下命令：

colcon build--symlink install

我得到了这个错误：

Starting >>> sick_scan2
--- stderr: sick_scan2
CMake Error at CMakeLists.txt:24 (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   <<< sick_scan2 [ Exited with code 1 ]

Summary: 0 packages finished [0.30s]
1 package failed: sick_scan2
1 package had stderr output: sick_scan2

开始>>>生病扫描2
---标准：病态扫描2
CMakeLists.txt:24处的CMake错误（查找包）：
通过在cmake_模块_路径中不提供“Findament_cmake.cmake”
项目
已要求CMake查找由提供的包配置文件
“ament_cmake”，但cmake没有找到。
找不到“ament_cmake”提供的包配置文件
具有
下列任何名称：
ament_cmakeConfig.cmake
ament_cmake-config.cmake
将“ament_cmake”的安装前缀添加到cmake_prefix_路径或集合中
“ament_cmake_DIR”指向包含上述文件之一的目录。如果
“ament_cmake”提供了一个单独的开发包或SDK，请确保
已安装。
---
失败您似乎没有安装一些环境变量

当我试图用Colcon建立ROS2项目时，我也遇到了类似的问题。
但是，当我最初将我的环境（类似于
~ros2\u ws/install/setup.bash）
来源化时，它就变得很好了

另外，如果您的问题也与ROS有关，请不要忘记在构建：
之后将已安装的库添加到类路径。install/setup.bash
下面详细解释了答案