[Dcmlib] Compilation on MACOSX

[Mathieu Malaterre]

Bon pour l'instant ca compile pas:

Building shared library /Users/foo/Temp/gdcmbin/bin/libgdcmljpeg.dylib...
ld: common symbols not allowed with MH_DYLIB output format with the 
-multi_module option
decomp.o definition of common _JpegInFile (size 4)
decomp.o definition of common _dcInfo (size 140)
huffd.o definition of common _inputBuffer (size 4)
jpegutil.o definition of common _buf1Memory (size 8192)
jpegutil.o definition of common _buf2Memory (size 8192)
jpegutil.o definition of common _mcuROW1Memory (size 4096)
jpegutil.o definition of common _mcuROW2Memory (size 4096)
mcu.o definition of common _mcuTable (size 4)
mcu.o definition of common _numMCU (size 4)
read.o definition of common _HuffmanTableMemory (size 12960)
/usr/bin/libtool: internal link edit command failed
make[4]: *** [/Users/foo/Temp/gdcmbin/bin/libgdcmljpeg.dylib] Error 1
make[3]: *** [/Users/foo/Temp/gdcmbin/bin/libgdcmljpeg.dylib] Error 2
make[2]: *** [default_target] Error 2
make[1]: *** [default_target_src] Error 2
make: *** [default_target] Error 2