CMakeLists.txt与package.xml依赖项比较

这个是package.xml的依赖项

?<license>Apache-2.0</license>

? <buildtool_depend>ament_cmake</buildtool_depend>

? <depend>curl</depend>

? <depend>python3-yaml</depend>

? <!-- these are needed to build fastrtps -->

? <buildtool_depend>asio</buildtool_depend>

? <buildtool_depend>tinyxml2</buildtool_depend>

? <!-- end fastrtps deps -->

? <depend>clang-tidy</depend>

? <build_depend>flex</build_depend>

? <build_depend>bison</build_depend>

? <build_depend>libncurses-dev</build_depend>

? <build_depend>usbutils</build_depend>

? <exec_depend>python3-vcstool</exec_depend>

? <test_depend>ament_lint_auto</test_depend>

? <test_depend>ament_lint_common</test_depend>

? <export>

这个是Cmakelists.txt的依赖项

# find dependencies
find_package(ament_cmake REQUIRED)
# uncomment the following section in order to fill in
# further dependencies manually.
# find_package(<dependency> REQUIRED)

if(BUILD_TESTING)
? find_package(ament_lint_auto REQUIRED)
? # the following line skips the linter which checks for copyrights
? # uncomment the line when a copyright and license is not present in all source files
? #set(ament_cmake_copyright_FOUND TRUE)
? # the following line skips cpplint (only works in a git repo)
? # uncomment the line when this package is not in a git repo
? #set(ament_cmake_cpplint_FOUND TRUE)
? ament_lint_auto_find_test_dependencies()
endif()
可以看出来package.xml的依赖项远远多于cmakelists.txt依赖项，并不是一样的。

解释：cmakelists.txt只负责编译有关的依赖，其他无关不用管，package.xml包含了所有的依赖项，所以cmakelist依赖包含于package.xml依赖