[CMake] Issues with FindBoost / ${Boost_LIBRARIES}

[Michael Wild]

On 02/01/2012 09:33 AM, Arnaud Gelas wrote:
> 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
> 

Looks to me like the symlink /usr/lib/libboost_graph-mt.so doesn't
exist. Did you check that?

Michael