CMake is not able to find boost components using wt-config.cmake

[StefanRommel]

The expression

find_package(Boost QUIET COMPONENTS "@Boost_COMPONENTS@")

results in

find_package(Boost QUIET COMPONENTS "program_options;filesystem;thread")

according to the CMake documentation [1] and [2] is a list with one entry "program_options;filesystem;thread" and CMake is unable to find the component "program_options;filesystem;thread"

The correct form is

find_package(Boost QUIET COMPONENTS program_options;filesystem;thread)

Then CMake interprets program_options;filesystem;thread as a list with three entries.

[1] https://cmake.org/cmake/help/latest/command/find_package.html?highlight=components
[2] https://cmake.org/cmake/help/latest/command/list.html

[emweb]

When I test this, both ways seem to work just fine. Do you have some way to reproduce the issue you're experiencing?

Regards,
Roel

[StefanRommel]

I've written a simple CMakeLists.txt:

cmake_minimum_required (VERSION 3.16)
project (HELLO)

find_package(Boost QUIET COMPONENTS "program_options;filesystem;thread")

message("Boost version is ${Boost_VERSION_STRING}")

and the output is:

-- The C compiler identification is GNU 9.2.0
-- The CXX compiler identification is GNU 9.2.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at /usr/lib64/cmake/Boost-1.71.0/BoostConfig.cmake:182 (boost_find_component):
  boost_find_component Macro invoked with incorrect arguments for macro
  named: boost_find_component
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindBoost.cmake:443 (find_package)
  CMakeLists.txt:4 (find_package)


CMake Error at /usr/lib64/cmake/Boost-1.71.0/BoostConfig.cmake:182 (boost_find_component):
  boost_find_component Macro invoked with incorrect arguments for macro
  named: boost_find_component
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindBoost.cmake:443 (find_package)
  CMakeLists.txt:4 (find_package)


CMake Error at /usr/lib64/cmake/Boost-1.71.0/BoostConfig.cmake:182 (boost_find_component):
  boost_find_component Macro invoked with incorrect arguments for macro
  named: boost_find_component
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindBoost.cmake:443 (find_package)
  CMakeLists.txt:4 (find_package)


Boost version is 1.71.0
-- Configuring incomplete, errors occurred!
See also "/home/stefan/Desktop/src/build/CMakeFiles/CMakeOutput.log".

The issue occurs on archlinux [1] with Boost-Libs Version 1.71.0 and CMake Version 3.16.2

[1] https://www.archlinux.org/

[emweb]

Thanks, I'll check it out. I was checking by changing wt-config.cmake with CMake 3.16.2 and Boost 1.72, and not noticing any issues.

[emweb]

For some reason I really had to try it on arch to see the same problem. It was just working on Ubuntu 18.04, when using a binary download of CMake 3.16.2 and building Boost 1.71.0 from source.

[Becheler]

Thank you for reporting this issue, I bumped into the same type of error for my own project and without your posts I would have had a hard time figuring out what was happening 👍 (Ubuntu 20.04, cmake 3.18 from snap, and boost 1.71)
You saved my night !