[MACTCL] BLT once again

[Philipp R. <Der...@gm...>]

Trying to install the BLT extension for Mac OS X / X11 everything goes 
fine until 'make install'.
Here's the output:

"
...
cc -dynamiclib  -prebind  -o libBLT24.so bltInit.o <~ 50 .o files>
/usr/bin/libtool: internal link edit command failed
ld: common symbols not allowed with MH_DYLIB output format with the 
-multi_module option
bltInit.o definition of common _bltEmptyStringObjPtr (size 4)
<~ 20 similar lines>
"

What goes wrong and how do I fix it?

Phil