On Aug 6, 2009, at 06:02 , Mathieu Malaterre wrote:
On Wed, Aug 5, 2009 at 6:55 PM, Stephen Roderick<kiwi....@mac.com>
wrote:
The existing UseSWIG.cmake file creates a MODULE and not a SHARED
library.
The module is unuseable by any program trying to load dynamic
libraries (eg
wrapped Java). The attached patch fixes this problem for our
situations.
Demonstrated on both Mac OS X Leopard and Ubuntu Jaunty.
Is this a known issue? I searched what I could of the list and the
'net, and
couldn't find anything on this.
No, you are confusing the C++ library and the Java binding. Instead:
ADD_LIBRARY(foo SHARED ${foo_SRCS}) # the actual shared lib
SWIG_ADD_MODULE(foojni java foo.i)
SWIG_LINK_LIBRARIES(foojni foo
${JNI_LIBRARIES}
)
The next time you will want to create -say- a python module you'll
simply link to your *shared C++* library:
SWIG_ADD_MODULE(foopython python foo.i)
SWIG_LINK_LIBRARIES(foopython foo
${PYTHON_LIBRARIES}
)
Unfortunately, that is what we currently have.
<code>
ADD_LIBRARY(MyInterfaceCpp ...)
Find_Package(SWIG REQUIRED)
Find_Package(JNI REQUIRED)
INCLUDE(UseSWIG)
INCLUDE_DIRECTORIES(${JAVA_INCLUDE_PATH} ${JAVA_INCLUDE_PATH2})
SET_SOURCE_FILES_PROPERTIES(MyInterface.i PROPERTIES CPLUSPLUS 1)
# compile swig with package flag
SET(CMAKE_SWIG_FLAGS -package x.y.z)
SWIG_ADD_MODULE(MyInterface java MyInterface.i)
SWIG_LINK_LIBRARIES(MyInterface
MyInterfaceCpp ...)
</code>
The failure comes when you try to load the SWIG-output, JNI library
from within java, using something like
<code>
static {
System.loadLibrary("MyInterface");
}
</code>
With a module in a "MyInterface.so" file (what SWIG currently
outputs), the above call fails on both Mac OS X and Linux. They both
need a correctly named dynamic library, hence the patch.
After searching some more I did find a previous post of this on the
CMake ML, and the solution there is basically the same as mine (except
the user copied the SWIG macro into their own CMakeLists.txt and then
made the same changes). If that poster and myself are not doing
anything wrong, then UseSWIG.cmake needs to be modified to support
both naming styles. Else others will just hit this again in the future.
http://www.cmake.org/pipermail/cmake/2008-October/024727.html
TIA
Stephen
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