CGAL users discussion list

[魏华祎 <>]

Hi, Joachim,

      Thanks for your reply.  It still  not work, here is the compile information, it said that it can not find -lboost, but  I do have installed the boost in /usr/local/include  and /usr/local/lib/.  And I can compile my CGAL example very well, I mean use cmake and make command.  

%%%%%%%%%%%%
mex -v mexfile.cpp -lCGAL -lgmp -lboost  -I/usr/include/:/usr/local/include/:/opt/matlab/extern/include/ -L/usr/lib/:/usr/local/lib/:/opt/matlab/extern/lib/glnxa64
-> mexopts.sh sourced from directory (DIR = $HOME/.matlab/$REL_VERSION)
   FILE = /home/huayiwei/.matlab/R2010a/mexopts.sh
----------------------------------------------------------------
->    MATLAB                = /opt/matlab
->    CC                    = gcc
->    CC flags:
         CFLAGS             = -ansi -D_GNU_SOURCE  -fexceptions -fPIC -fno-omit-frame-pointer -pthread
         CDEBUGFLAGS        = -g
         COPTIMFLAGS        = -O -DNDEBUG
         CLIBS              = -Wl,-rpath-link,/opt/matlab/bin/glnxa64 -L/opt/matlab/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++
         arguments          =  -DMX_COMPAT_32
->    CXX                   = g++
->    CXX flags:
         CXXFLAGS           = -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread
         CXXDEBUGFLAGS      = -g
         CXXOPTIMFLAGS      = -O -DNDEBUG
         CXXLIBS            = -Wl,-rpath-link,/opt/matlab/bin/glnxa64 -L/opt/matlab/bin/glnxa64 -lmx -lmex -lmat -lm
         arguments          =  -DMX_COMPAT_32
->    FC                    = g95
->    FC flags:
         FFLAGS             = -fexceptions -fPIC -fno-omit-frame-pointer
         FDEBUGFLAGS        = -g
         FOPTIMFLAGS        = -O
         FLIBS              = -Wl,-rpath-link,/opt/matlab/bin/glnxa64 -L/opt/matlab/bin/glnxa64 -lmx -lmex -lmat -lm
         arguments          =  -DMX_COMPAT_32
->    LD                    = g++
->    Link flags:
         LDFLAGS            = -pthread -shared -Wl,--version-script,/opt/matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined
         LDDEBUGFLAGS       = -g
         LDOPTIMFLAGS       = -O
         LDEXTENSION        = .mexa64
         arguments          =  -lCGAL -lgmp -lboost -L/usr/lib/:/usr/local/lib/:/opt/matlab/extern/lib/glnxa64
->    LDCXX                 = 
->    Link flags:
         LDCXXFLAGS         = 
         LDCXXDEBUGFLAGS    = 
         LDCXXOPTIMFLAGS    = 
         LDCXXEXTENSION     = 
         arguments          =  -lCGAL -lgmp -lboost -L/usr/lib/:/usr/local/lib/:/opt/matlab/extern/lib/glnxa64
----------------------------------------------------------------


Warning: You are using gcc version "4.4.3-4ubuntu5)".  The version
         currently supported with MEX is "4.2.3".
         For a list of currently supported compilers see: 
         http://www.mathworks.com/support/compilers/current_release/

-> g++ -c  -I/usr/include/:/usr/local/include/:/opt/matlab/extern/include/ -I/opt/matlab/extern/include -I/opt/matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread  -DMX_COMPAT_32 -O -DNDEBUG  "mexfile.cpp"

-> g++ -O -pthread -shared -Wl,--version-script,/opt/matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o  "mexfile.mexa64"  mexfile.o  -lCGAL -lgmp -lboost -L/usr/lib/:/usr/local/lib/:/opt/matlab/extern/lib/glnxa64 -Wl,-rpath-link,/opt/matlab/bin/glnxa64 -L/opt/matlab/bin/glnxa64 -lmx -lmex -lmat -lm

/usr/bin/ld: cannot find -lboost
collect2: ld returned 1 exit status

    mex: link of ' "mexfile.mexa64"' failed.

??? Error using ==> mex at 222
Unable to complete successfully.

%%%%%%%%%%%%%%%%%%%%%%%%

On Sun, Mar 13, 2011 at 4:00 PM, Joachim Reichel <> wrote:

Hi,

>      I have a problem to use mex in matlab to compile the "mexfile.cpp" in
> attachment. In matlab command windows, I use the following command:
>
>>> mex mexfile.cpp
> -I/usr/include/:/usr/local/include/:/opt/matlab/extern/include/
> -L/usr/lib/:/usr/local/lib/:/opt/matlab/extern/lib/glnxa64
>
>
> My CGAL and gmp install location is /usr/include/  and /usr/lib,   my boost
> location is /usr/local/include/  and /usr/local/lib/
>
> But  I can't complie it, can you give me some suggestion about it?  Thanks
> very much!
> The compile result is following:*
>
>
> Warning: You are using gcc version "4.4.3-4ubuntu5)".  The version
>          currently supported with MEX is "4.2.3".
>          For a list of currently supported compilers see:
>          http://www.mathworks.com/support/compilers/current_release/
>
> mexfile.o: In function `CGAL::Handle_for<CGAL::Gmpq_rep,
> std::allocator<CGAL::Gmpq_rep> >::~Handle_for()':
> mexfile.cpp:(.text._ZN4CGAL10Handle_forINS_8Gmpq_repESaIS1_EED2Ev[CGAL::Handle_for<CGAL::Gmpq_rep,
> std::allocator<CGAL::Gmpq_rep> >::~Handle_for()]+0x18): undefined reference
> to `__gmpq_clear'
> mexfile.o: In function `boost::operator-(CGAL::Gmpq const&, CGAL::Gmpq
> const&)':
> mexfile.cpp:(.text._ZN5boostmiERKN4CGAL4GmpqES3_[boost::operator-(CGAL::Gmpq
> const&, CGAL::Gmpq const&)]+0x3e): undefined reference to `__gmpq_init'
> mexfile.cpp:(.text._ZN5boostmiERKN4CGAL4GmpqES3_[boost::operator-(CGAL::Gmpq
> const&, CGAL::Gmpq const&)]+0x60): undefined reference to `__gmpq_sub'
> mexfile.o: In function `boost::operator*(CGAL::Gmpq const&, CGAL::Gmpq
> const&)':
> mexfile.cpp:(.text._ZN5boostmlERKN4CGAL4GmpqES3_[boost::operator*(CGAL::Gmpq
> const&, CGAL::Gmpq const&)]+0x3e): undefined reference to `__gmpq_init'
> mexfile.cpp:(.text._ZN5boostmlERKN4CGAL4GmpqES3_[boost::operator*(CGAL::Gmpq
> const&, CGAL::Gmpq const&)]+0x60): undefined reference to `__gmpq_mul'
> mexfile.o: In function `CGAL::Same_uncertainty_nt<CGAL::Sign,
> CGAL::Gmpq>::type CGAL::orientationC2<CGAL::Gmpq>(CGAL::Gmpq const&,
> CGAL::Gmpq const&, CGAL::Gmpq const&, CGAL::Gmpq const&, CGAL::Gmpq const&,
> CGAL::Gmpq const&)':

> [...]

It seems that you do not link with the used libraries. You need at least -lCGAL,
maybe also -lboost or -lgmp.

If it still does not work please show the linker command that is executed. I
don't know the mex tool, but I guess it has a mode that echoes the executed
commands.

Joachim

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