Error when trying to link Boost library using CMake

Question

I'm using:

My CMake file was based on the second example at https://cmake.org/cmake/help/v3.6/module/FindBoost.html , plus:

I'm debugging it:

 set (Boost_DEBUG ON) set (Boost_DETAILED_FAILURE_MSG ON) find_package(Boost 1.72 EXACT REQUIRED COMPONENTS filesystem)

I had to set:

 target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${Boost_INCLUDE_DIR})

And I'm using Boost_LIBRARIES variable:

 target_link_libraries(${CMAKE_PROJECT_NAME} Qt5::Widgets ${Boost_LIBRARIES})

All that should just work like a charm - but I'm getting:

2>LINK : fatal error LNK1104: cannot open file 'libboost_filesystem-vc142-mt-gd-x64-1_72.lib'

From FindBoost debug I can see that:

[ C:/Program Files/CMake/share/cmake-3.16/Modules/FindBoost.cmake:1541 ] BOOST_LIBRARYDIR = < unset>

THIS SOLVES THE ISSUE:

link_directories(${Boost_LIBRARY_DIR_RELEASE})

THIS ALSO SOLVES THE ISSUE:

set(Boost_USE_STATIC_LIBS        ON) # only find static libs
set(Boost_USE_MULTITHREADED      ON)
set(Boost_USE_STATIC_RUNTIME    OFF)

BUT I'M NOT SUPPOSED TO NEED THAT!

Can someone tell what is wrong?

Answer 1