Problem with shrext on Mac OS X

[Ian Kerr]

Hello,

I'm trying to build a JNI library and, from what I understand, the library 
needs to have a '.jnilib' extension on Mac OS X.  As I understand it, I 
should be able to use the -shrext flag to get libtool to use the jnilib 
extension rather than the standard shared library extension.  However, I 
can't get this to work.  I issue the command:

/bin/sh ../../../libtool --mode=link g++ -shared -rpath /usr/local/lib 
-shrext .jnilib -o libjmath.la swig_math.lo

and the following g++ invocation is made:

g++ -dynamiclib  -single_module -flat_namespace -undefined suppress -o 
.libs/libjmath.0.dylib  .libs/swig_math.o   -install_name 
/usr/local/lib/libjmath.0.dylib -compatibility_version 1 -current_version 
1.0

As you can see, the extension isn't changed from dylib to jnilib. As I'm 
new to libtool I figure I'm doing something wrong.  Any ideas?

Thanks,
--Ian