Public bug reported:
In PCLConfig.cmake line 115&116 says:
if(PCL_ALL_IN_ONE_INSTALLER)
set(BOOST_ROOT "${PCL_ROOT}/3rdParty/Boost")
,in which PCL_ALL_IN_ONE_INSTALLER has already set to be ON in line 435
through a normal apt install procedure. That will lead to a link error
of libboost, if we firstly find boost and then find pcl. The following
is a simple example of CMakeList.txt:
cmake_minimum_required(VERSION 3.16)
project(main)
find_package(
Boost
COMPONENTS
system
thread
chrono
REQUIRED
)
find_package(
PCL
REQUIRED
)
include_directories(
${Boost_INCLUDE_DIRS}
)
link_directories(
${Boost_LIBRARY_DIRS}
)
add_executable(main main.cpp)
target_link_libraries(
main
${Boost_LIBRARIES}
)
Any used boost functions in main.cpp will lead to link error like this:
main.cpp:5: undefined reference to
`boost::thread::hardware_concurrency()', even though pcl remains unused
in the cpp file. Simply move find_package(Boost ...) to the back of
find_package(PCL ...) will solve the problem, because now we are using
the boost lib provided by pcl.However, such a solution is not
stragihtforward at all anc hart to be figured out. Hope you can help to
remove such a confusing change of BOOST_ROOT, given that libboost-dev
can also easily get installed by apt and already exists in many ubuntus.
** Affects: pcl (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1928819
Title:
File "PCLConfig.cmake" will unexpectedly change BOOST_ROOT and lead to
link error
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