Library linking problem under gcc on Mac OS Tiger

[Linwei Wang]

Dear all,

   I have been got stuck in a linking problem for my c++ program  
with gcc on Mac OS Tiger, it happens when I need to use shared  
libraries. For example, when I use matlab engine in the program, the  
compiling is ok, but the liking will give error as:

  -ld: undefined symbol: ..........
 _engClose
.....
  /usr/bin/libtool: internal link edit command failed

  I have included the necessary path during linking: eg

  g++ -L/Applications/MATLAB_SV74/bin/maci -L/Applications/ 
MATLAB_SV74/bin/maci -dynamiclib -o engdemo.o ...

  and I use nm which shows, eg, _engClose is in the library  
libeng.dylib, which is under the matlabroot/bin/maci path

 Besides, I also set the DYLD_LIBRARY_PATH to include these library  
paths.......

  and I dun think it is related to matlab issue, because in another  
program using vtk, it also give "undefined symbol" error during  
linking..

  I've checked a lot, seems there are similar situations reported,  
but I still can not find a solution to it.. Can anyone help?

  Thanks very much

  Linwei