Properly configuring boost in CMake - c++

Question

I have a very simple boost application:
#include <iostream>
#include "boost/filesystem.hpp"
int main(int /*argc*/, char** /*argv*/) {
if( boost::filesystem::exists(".") )
std::cout << "exists" << std::endl;
return 0;
}
Which I configure with CMake:
cmake_minimum_required (VERSION 2.8 FATAL_ERROR)
set(USE_BOOST_LIB_HACK TRUE)
#--- Boost (TODO: wrong libraries linked)
find_package (BOOST COMPONENTS filesystem system REQUIRED)
include_directories(${Boost_INCLUDE_DIRS})
link_directories(${Boost_LIBRARY_DIRS})
if(USE_BOOST_LIB_HACK)
#--- Now I need to manually append them to avoid missing symbols
list(APPEND libs /usr/local/lib/libboost_system.dylib)
list(APPEND libs /usr/local/lib/libboost_filesystem.dylib)
else()
list(APPEND libs ${Boost_LIBRARIES})
message(STATUS BOOST: ${Boost_LIBRARIES}) #<<< EMPTY :( :(
endif()
#--- Add all sources in this folder
file(GLOB_RECURSE hdrs "*.h")
file(GLOB_RECURSE srcs "*.cpp")
#--- Create executable and link
set(CMAKE_BUILD_TYPE "Debug")
add_executable(boost ${hdrs} ${srcs})
target_link_libraries(boost ${libs})
Note tha hack USE_BOOST_LIB_HACK in the file above. But shouldn't Boost_LIBRARIES have what I need? In the configure above it's a trivial empty string. I am using {cmake,boost1.5} from OSX/Homebrew
Is my configuration somehow incorrect?
Thanks!

Answer 1

CMake is case-sensitive. Use find_package(Boost ...) but not find_package(BOOST ...).
BTW COMPONENTS suboption is optional if REQUIRED used:
find_package(Boost REQUIRED filesystem system)
Possible explanation: http://pastebin.com/qQyGnQDL

Answer 2

Here's how the documentation from FindBoost.cmake describes proper usage of the macro:
#
# set(Boost_USE_STATIC_LIBS ON)
# set(Boost_USE_MULTITHREADED ON)
# set(Boost_USE_STATIC_RUNTIME OFF)
# find_package( Boost 1.36.0 COMPONENTS date_time filesystem system ... )
#
# if(Boost_FOUND)
# include_directories(${Boost_INCLUDE_DIRS})
# add_executable(foo foo.cc)
# target_link_libraries(foo ${Boost_LIBRARIES})
# endif()
And this method works well on Linux indeed. But I'm not sure about MacOSX/HomeBrew, although it's not mentioned specifically in the macro.