### Installing ROS1 Artifacts (CMake)

Source: https://github.com/koide3/ndt_omp/blob/master/CMakeLists.txt

This snippet defines the installation rules for the `ndt_omp` library and its headers when building for ROS1. It specifies destination paths for archives, runtimes, libraries, and include directories using Catkin's global installation variables.

```CMake
#############
## INSTALL ##
#############

install(
  TARGETS
    ndt_omp
  ARCHIVE DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
  RUNTIME DESTINATION ${CATKIN_PACKAGE_BIN_DESTINATION}
  LIBRARY DESTINATION ${CATKIN_PACKAGE_LIB_DESTINATION}
)

# install headers
install(DIRECTORY include/pclomp
        DESTINATION ${CATKIN_GLOBAL_INCLUDE_DESTINATION})
```

--------------------------------

### Configuring, Building, and Installing for ROS2 (CMake)

Source: https://github.com/koide3/ndt_omp/blob/master/CMakeLists.txt

This block handles ROS2-specific configurations. It uses `ament_cmake_auto` to find build dependencies, builds `ndt_omp` as a shared library, links it with PCL and OpenMP (if found), and defines installation rules for the library, including exporting its targets for other ROS2 packages.

```CMake
else()

# ROS2
find_package(ament_cmake_auto REQUIRED)
ament_auto_find_build_dependencies()

###########
## Build ##
###########
include_directories(include)
include_directories(
  ${catkin_INCLUDE_DIRS}
)

add_library(ndt_omp
  SHARED
  src/pclomp/voxel_grid_covariance_omp.cpp
  src/pclomp/ndt_omp.cpp
  src/pclomp/gicp_omp.cpp
)

ament_export_targets(ndt_omp HAS_LIBRARY_TARGET)

target_link_libraries(ndt_omp ${PCL_LIBRARIES})

if(OpenMP_CXX_FOUND)
  target_link_libraries(ndt_omp OpenMP::OpenMP_CXX)
else()
  message(WARNING "OpenMP not found")
endif()

install(
  TARGETS
    ndt_omp
  EXPORT ndt_omp
  LIBRARY DESTINATION lib
  ARCHIVE DESTINATION lib
  RUNTIME DESTINATION bin
  INCLUDES DESTINATION include
)

ament_auto_package()
endif()
```

--------------------------------

### Running NDT_OMP Benchmark in Bash

Source: https://github.com/koide3/ndt_omp/blob/master/README.md

This command sequence navigates to the ndt_omp/data directory and then executes the align utility from the ndt_omp package. It performs a point cloud alignment benchmark using two specified PCD files, demonstrating the performance of the NDT algorithm variants.

```Bash
$ roscd ndt_omp/data
$ rosrun ndt_omp align 251370668.pcd 251371071.pcd
```

--------------------------------

### Configuring and Building for ROS1 (CMake)

Source: https://github.com/koide3/ndt_omp/blob/master/CMakeLists.txt

This block handles ROS1-specific configurations. It finds `catkin` and required components, defines the `ndt_omp` package, adds include directories, builds the `ndt_omp` library from specified source files, and creates an `align` executable linking against `ndt_omp`, `catkin`, and PCL libraries.

```CMake
if($ENV{ROS_VERSION} EQUAL 1)
# ROS1
find_package(catkin REQUIRED COMPONENTS
  roscpp
  pcl_ros
)

###################################
## catkin specific configuration ##
###################################
catkin_package(
  INCLUDE_DIRS include
  LIBRARIES ndt_omp
)

###########
## Build ##
###########
include_directories(include)
include_directories(
  ${catkin_INCLUDE_DIRS}
)

add_library(ndt_omp
  src/pclomp/voxel_grid_covariance_omp.cpp
  src/pclomp/ndt_omp.cpp
  src/pclomp/gicp_omp.cpp
)

add_executable(align
  apps/align.cpp
)
add_dependencies(align
  ndt_omp
)
target_link_libraries(align
  ${catkin_LIBRARIES}
  ${PCL_LIBRARIES}
  ndt_omp
)
```

--------------------------------

### Setting Project and Compiler Flags (CMake)

Source: https://github.com/koide3/ndt_omp/blob/master/CMakeLists.txt

This snippet initializes the CMake project, sets the C++ standard to C++14, and conditionally adds architecture-specific compile options (e.g., -march=native or SSE flags) based on the `BUILD_WITH_MARCH_NATIVE` variable. It also forces the build type to RELEASE to avoid PCL debug segfaults.

```CMake
cmake_minimum_required(VERSION 3.10)
project(ndt_omp)

add_definitions(-std=c++14)
set(CMAKE_CXX_FLAGS "-std=c++14")

if (BUILD_WITH_MARCH_NATIVE)
  add_compile_options(-march=native)
else()
  add_definitions(-msse -msse2 -msse3 -msse4 -msse4.1 -msse4.2)
  set(CMAKE_CXX_FLAGS "-msse -msse2 -msse3 -msse4 -msse4.1 -msse4.2")
endif()

# pcl 1.7 causes a segfault when it is built with debug mode
set(CMAKE_BUILD_TYPE "RELEASE")
```

--------------------------------

### Finding PCL and OpenMP Dependencies (CMake)

Source: https://github.com/koide3/ndt_omp/blob/master/CMakeLists.txt

This section locates the PCL library (version 1.7 or higher) and OpenMP. It includes PCL directories and definitions, and if OpenMP is found, it appends its compiler flags to C and C++ flags, enabling parallel processing support.

```CMake
find_package(PCL 1.7 REQUIRED)
include_directories(${PCL_INCLUDE_DIRS})
link_directories(${PCL_LIBRARY_DIRS})
add_definitions(${PCL_DEFINITIONS})

message(STATUS "PCL_INCLUDE_DIRS:" ${PCL_INCLUDE_DIRS})
message(STATUS "PCL_LIBRARY_DIRS:" ${PCL_LIBRARY_DIRS})
message(STATUS "PCL_DEFINITIONS:" ${PCL_DEFINITIONS})

find_package(OpenMP)
if (OPENMP_FOUND)
    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif()
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.