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I am working on macOS Catalina and I want to compile some c++ code using CMake.

This code needs the library boost that I installed via Brew (brew install boost). In my code I added #include <boost/functional/hash.hpp> to use it.

When I compile I got the following error: 

fatal error: boost/functional/hash.hpp: No such file or directory #include <boost/functional/hash.hpp>

Obviously, the compiler does not find the library, so my question is: how can I tell him where the library is? I prefer to set some environment variable, and if it is not possible, how can I do that using CMake?

The file that calls boost:

#include "../../include/util/SubsetInt.hpp" #include <boost/functional/hash.hpp> namespace cats { SubsetInt::SubsetInt(const SubsetInt& p) { field = std::vector<uint64_t>(); for (uint64_t e : p.field) { field.push_back(e); } } }

The CMakeLists.txt:

cmake_minimum_required(VERSION 3.1) project(catsFramework) find_package(Boost REQUIRED COMPONENTS system unit_test_framework) find_package(OpenMP REQUIRED) set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_FLAGS "${OpenMP_CXX_FLAGS} -O3 -DNDEBUG -Wall") # set(CMAKE_CXX_FLAGS "${OpenMP_CXX_FLAGS} -O1 -g -Wall") ################### COMBINATOR LIBS ########################## add_library(LDSCombinator STATIC include/combinators/LDSCombinator.hpp src/combinators/LDSCombinator.cpp ) add_library(PrefixEquivalenceCombinator STATIC include/combinators/PrefixEquivalenceCombinator.hpp src/combinators/PrefixEquivalenceCombinator.cpp ) add_library(IterativeBroadeningCombinator STATIC include/combinators/IterativeBroadeningCombinator.hpp src/combinators/IterativeBroadeningCombinator.cpp ) add_library(ProbingCombinator STATIC include/combinators/ProbingCombinator.hpp src/combinators/ProbingCombinator.cpp ) add_library(SolutionPartsCombinator STATIC include/combinators/SolutionPartsCombinator.hpp src/combinators/SolutionPartsCombinator.cpp ) add_library(WeightedCombinator STATIC include/combinators/WeightedCombinator.hpp src/combinators/WeightedCombinator.cpp ) # all combinators defintion set( COMBINATORS LDSCombinator IterativeBroadeningCombinator PrefixEquivalenceCombinator ProbingCombinator SolutionPartsCombinator WeightedCombinator ) ############## TREE SEARCH ALGORITHMS ################# add_library(DFS STATIC include/treesearch/DFS.hpp src/treesearch/DFS.cpp ) add_library(BFS STATIC include/treesearch/BFS.hpp src/treesearch/BFS.cpp ) add_library(AStar STATIC include/treesearch/AStar.hpp src/treesearch/AStar.cpp ) add_library(MBAStar STATIC include/treesearch/MBAStar.hpp src/treesearch/MBAStar.cpp ) add_library(BeamSearch STATIC include/treesearch/BeamSearch.hpp src/treesearch/BeamSearch.cpp ) add_library(GreedyRandom STATIC include/treesearch/GreedyRandom.hpp src/treesearch/GreedyRandom.cpp ) add_library(WeightedAStar STATIC include/treesearch/WeightedAStar.hpp src/treesearch/WeightedAStar.cpp ) add_library(Greedy STATIC include/treesearch/Greedy.hpp src/treesearch/Greedy.cpp ) add_library(IterativeMBAStar STATIC include/treesearch/IterativeMBAStar.hpp src/treesearch/IterativeMBAStar.cpp ) add_library(IterativeBeamSearch STATIC include/treesearch/IterativeBeamSearch.hpp src/treesearch/IterativeBeamSearch.cpp ) add_library(LDS STATIC include/treesearch/LDS.hpp src/treesearch/LDS.cpp ) add_library(BULB STATIC include/treesearch/BULB.hpp src/treesearch/BULB.cpp ) add_library(IterativeBroadening STATIC include/treesearch/IterativeBroadening.hpp src/treesearch/IterativeBroadening.cpp ) add_library(BranchAndGreed STATIC include/treesearch/BranchAndGreed.hpp src/treesearch/BranchAndGreed.cpp ) add_library(ACO STATIC include/treesearch/ACO.hpp src/treesearch/ACO.cpp ) add_library(RouletteWheelGreedy STATIC include/treesearch/RouletteWheelGreedy.hpp src/treesearch/RouletteWheelGreedy.cpp ) add_library(IterativeRouletteWheelGreedy STATIC include/treesearch/IterativeRouletteWheelGreedy.hpp src/treesearch/IterativeRouletteWheelGreedy.cpp ) add_library(MCTS STATIC include/treesearch/RouletteWheelGreedy.hpp src/treesearch/RouletteWheelGreedy.cpp include/treesearch/MCTS.hpp src/treesearch/MCTS.cpp ) add_library(AnytimeColumnSearch STATIC include/treesearch/AnytimeColumnSearch.hpp src/treesearch/AnytimeColumnSearch.cpp ) # all tree search algorithms set( ALGORITHMS DFS BFS AStar MBAStar BeamSearch GreedyRandom WeightedAStar Greedy BranchAndGreed IterativeBroadening BULB LDS IterativeBeamSearch IterativeMBAStar ACO RouletteWheelGreedy IterativeRouletteWheelGreedy MCTS AnytimeColumnSearch ) # base code add_library(catsBase STATIC include/Node.hpp include/SearchManager.hpp include/Store.hpp include/io.hpp include/numeric.hpp include/SolutionParts.hpp include/Combinator.hpp include/PrefixEquivalence.hpp src/Node.cpp src/SearchManager.cpp src/io.cpp ) # util code add_library(catsUtil STATIC # set ( UTIL include/util/includeAlgorithms.hpp include/util/SubsetInt.hpp src/util/SubsetInt.cpp ) set ( ALL ${COMBINATORS} ${ALGORITHMS} catsUtil catsBase ) # UNIT TESTING enable_testing() add_executable( testInverseBS.exe unittest/testInverseBS.cpp unittest/InverseGuideBS.hpp) target_link_libraries(testInverseBS.exe ${ALL}) add_executable( testSubsetInt.exe unittest/testSubsetInt.cpp) target_link_libraries(testSubsetInt.exe ${ALL}) add_test( InverseBS testInverseBS.exe ) add_test( SubsetInt testSubsetInt.exe )
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  • Please provide the code you have so far, and show us what you tried. There are already lots of answered questions on this site about using Boost with CMake. Commented Jan 28, 2020 at 17:01
  • You need to add options to your compilers command line to tell it where to search for includes (-I with GCC/clang) and where to find the runtime libraries to link with (-L with GCC/clang). Commented Jan 28, 2020 at 17:03

2 Answers 2

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Usually you would use find_package to find and configure libraries with CMake. Boost provides a CMake configuration file FindBoost.

Here is an example for one library using targets (currently the recommended way)

find_package(Boost REQUIRED COMPONENTS system unit_test_framework) add_library(LDSCombinator STATIC include/combinators/LDSCombinator.hpp src/combinators/LDSCombinator.cpp ) target_link_libraries(LDSCombinator Boost::system)

You have to link all executables and libraries that use Boost.

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It looks like you are already using find_package() to tell CMake to look for Boost installed on your system, specifically the system and unit_test_framework components. You now simply need to link the imported Boost targets to your library or executable that is using Boost. For example, link unit_test_framework to your testSubsetInt.exe target like this:

target_link_libraries(testSubsetInt.exe PUBLIC ${ALL} Boost::unit_test_framework )

This example encompasses the "modern" CMake approach. However, the Boost documentation provides more extended examples for including Boost libraries via CMake here.

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