[CMake] Issues with FindBoost / ${Boost_LIBRARIES}

[Arnaud Gelas]

Hi all,

I have been trying to compile a very simple example with cmake (2.8.5) and
boost, and I can't get what I am doing wrong...

CMakeLists.txt
----------------------

cmake_minimum_required(VERSION 2.6)

project(ReadGraph)

find_package(Boost 1.46 COMPONENTS graph regex )

link_directories(${Boost_LIBRARY_DIRS})
include_directories(BEFORE ${Boost_INCLUDE_DIRS})

add_executable(ReadGraph ReadGraph.cpp)
target_link_libraries(ReadGraph ${Boost_LIBRARIES} )
# target_link_libraries(ReadGraph boost_graph boost_regex )


ReadGraph.cpp
----------------------
// http://www.boost.org/doc/libs/1_37_0/libs/graph/doc/read_graphviz.html
#include <iostream>
#include <string>
#include <fstream>

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/graphviz.hpp>

int main(int , char* [])
{
  return 0;
}

Here is what the error I get when trying to compile:

$ make
/usr/bin/cmake -H/home/ajg23/GITROOT/BGLCMakeQuestion
-B/home/ajg23/GITROOT/BGLCMakeQuestion/build --check-build-system
CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start
/home/ajg23/GITROOT/BGLCMakeQuestion/build/CMakeFiles
/home/ajg23/GITROOT/BGLCMakeQuestion/build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
make -f CMakeFiles/ReadGraph.dir/build.make CMakeFiles/ReadGraph.dir/depend
make[2]: Entering directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
cd /home/ajg23/GITROOT/BGLCMakeQuestion/build && /usr/bin/cmake -E
cmake_depends "Unix Makefiles" /home/ajg23/GITROOT/BGLCMakeQuestion
/home/ajg23/GITROOT/BGLCMakeQuestion
/home/ajg23/GITROOT/BGLCMakeQuestion/build
/home/ajg23/GITROOT/BGLCMakeQuestion/build
/home/ajg23/GITROOT/BGLCMakeQuestion/build/CMakeFiles/ReadGraph.dir/DependInfo.cmake
--color=
make[2]: Leaving directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
make -f CMakeFiles/ReadGraph.dir/build.make CMakeFiles/ReadGraph.dir/build
make[2]: Entering directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
/usr/bin/cmake -E cmake_progress_report
/home/ajg23/GITROOT/BGLCMakeQuestion/build/CMakeFiles 1
[100%] Building CXX object CMakeFiles/ReadGraph.dir/ReadGraph.cpp.o
/usr/bin/c++     -o CMakeFiles/ReadGraph.dir/ReadGraph.cpp.o -c
/home/ajg23/GITROOT/BGLCMakeQuestion/ReadGraph.cpp
make[2]: *** No rule to make target `/usr/lib/libboost_graph-mt.so', needed
by `ReadGraph'.  Stop.
make[2]: Leaving directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
make[1]: *** [CMakeFiles/ReadGraph.dir/all] Error 2
make[1]: Leaving directory `/home/ajg23/GITROOT/BGLCMakeQuestion/build'
make: *** [all] Error 2


If I don't use ${Boost_LIBRARIES} but explicitly the corresponding
libraries (i.e. boost_graph and boost_regex) it compiles without any
problem...

Can anyone give me a hand on this one? Is this a bug?

Note that I have also been trying with the master and the next version of
cmake, same thing...

Thanks,
Arnaud
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