/usr/share/roscpp/rosbuild/roscpp.cmake is in libroscpp-dev 1.13.5+ds1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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rosbuild_find_ros_package(roscpp)
# Message-generation support.
macro(genmsg_cpp)
rosbuild_get_msgs(_msglist)
set(_autogen "")
foreach(_msg ${_msglist})
# Construct the path to the .msg file
set(_input ${PROJECT_SOURCE_DIR}/msg/${_msg})
rosbuild_gendeps(${PROJECT_NAME} ${_msg})
set(genmsg_cpp_exe ${roscpp_PACKAGE_PATH}/rosbuild/scripts/genmsg_cpp.py)
set(_output_cpp ${PROJECT_SOURCE_DIR}/msg_gen/cpp/include/${PROJECT_NAME}/${_msg})
string(REPLACE ".msg" ".h" _output_cpp ${_output_cpp})
# Add the rule to build the .h the .msg
add_custom_command(OUTPUT ${_output_cpp}
COMMAND ${genmsg_cpp_exe} ${_input}
DEPENDS ${_input} ${genmsg_cpp_exe} ${gendeps_exe} ${${PROJECT_NAME}_${_msg}_GENDEPS} ${ROS_MANIFEST_LIST})
list(APPEND _autogen ${_output_cpp})
endforeach(_msg)
# Create a target that depends on the union of all the autogenerated
# files
add_custom_target(ROSBUILD_genmsg_cpp DEPENDS ${_autogen})
# Make our target depend on rosbuild_premsgsrvgen, to allow any
# pre-msg/srv generation steps to be done first.
add_dependencies(ROSBUILD_genmsg_cpp rosbuild_premsgsrvgen)
# Add our target to the top-level rospack_genmsg target, which will be
# fired if the user calls genmsg()
add_dependencies(rospack_genmsg ROSBUILD_genmsg_cpp)
if(_autogen)
# Also set up to clean the msg_gen directory
get_directory_property(_old_clean_files ADDITIONAL_MAKE_CLEAN_FILES)
list(APPEND _old_clean_files ${PROJECT_SOURCE_DIR}/msg_gen)
set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${_old_clean_files}")
endif(_autogen)
endmacro(genmsg_cpp)
# Call the macro we just defined.
genmsg_cpp()
# Service-generation support.
macro(gensrv_cpp)
rosbuild_get_srvs(_srvlist)
set(_autogen "")
foreach(_srv ${_srvlist})
# Construct the path to the .srv file
set(_input ${PROJECT_SOURCE_DIR}/srv/${_srv})
rosbuild_gendeps(${PROJECT_NAME} ${_srv})
set(gensrv_cpp_exe ${roscpp_PACKAGE_PATH}/rosbuild/scripts/gensrv_cpp.py)
set(genmsg_cpp_exe ${roscpp_PACKAGE_PATH}/rosbuild/scripts/genmsg_cpp.py)
set(_output_cpp ${PROJECT_SOURCE_DIR}/srv_gen/cpp/include/${PROJECT_NAME}/${_srv})
string(REPLACE ".srv" ".h" _output_cpp ${_output_cpp})
# Add the rule to build the .h from the .srv
add_custom_command(OUTPUT ${_output_cpp}
COMMAND ${gensrv_cpp_exe} ${_input}
DEPENDS ${_input} ${gensrv_cpp_exe} ${genmsg_cpp_exe} ${gendeps_exe} ${${PROJECT_NAME}_${_srv}_GENDEPS} ${ROS_MANIFEST_LIST})
list(APPEND _autogen ${_output_cpp})
endforeach(_srv)
# Create a target that depends on the union of all the autogenerated
# files
add_custom_target(ROSBUILD_gensrv_cpp DEPENDS ${_autogen})
# Make our target depend on rosbuild_premsgsrvgen, to allow any
# pre-msg/srv generation steps to be done first.
add_dependencies(ROSBUILD_gensrv_cpp rosbuild_premsgsrvgen)
# Add our target to the top-level gensrv target, which will be fired if
# the user calls gensrv()
add_dependencies(rospack_gensrv ROSBUILD_gensrv_cpp)
if(_autogen)
# Also set up to clean the srv_gen directory
get_directory_property(_old_clean_files ADDITIONAL_MAKE_CLEAN_FILES)
list(APPEND _old_clean_files ${PROJECT_SOURCE_DIR}/srv_gen)
set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${_old_clean_files}")
endif(_autogen)
endmacro(gensrv_cpp)
# Call the macro we just defined.
gensrv_cpp()
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