[CMake] Platform specific output file advice

[Tristan Carel]

On 9/16/07, Alan W. Irwin <irwin at beluga.phys.uvic.ca> wrote:
> On 2007-09-16 13:23+1000 Nicholas Yue wrote:
>
> > Hi,
> >
> >  I have been successfully using CMake with SWIG to compile language
> > extensions for Java/Python/Ruby on Linux.
> >
> > -- for RUBY
> > SWIG_ADD_MODULE ( ribclient ruby ribclient.i ParameterList.cpp )
> > SWIG_LINK_LIBRARIES ( ribclient utils 3delight ruby )
> >
> > -- for Java
> > SWIG_ADD_MODULE ( ribclient java RIBClient.i ParameterList.cpp )
> > SWIG_LINK_LIBRARIES ( ribclient utils 3delight )
> >
> >  The build produces *.so file on both Linux and OSX but on OSX, Ruby
> > extension must end with .bundle and Java extension must be prefix with
> > 'lib" and postfix with ".jnilib"
> >
> >  Manually renaming the file works as the content has been correctly
> > compile by the Makefiles generated by CMake.
> >
> >  My question is should this be abstracted out into CMake as it should
> > handle cross platform build or should I use/write a macro to do that?
> >
> >  If I have to manually intervene, could someone point me to an
> > example of how one should rename a given file from within a CMake
> > configuration file like CMakeLists.txt.
>
> If its a target (sounds like the case here) then you can use
> SET_TARGET_PROPERTIES.  From the documentation of that command....
>
> "The PREFIX and SUFFIX properties override the default target
> name prefix (such as "lib") and suffix (such as ".so")"

For Java, you can use the following piece of code:

## The library name expected by the JNI relative to the system:
##   MacOS  : libLIBRARY.jnilib
##   Windows: LIBRARY.dll
##   Linux  : libLIBRARY.so
##
## where LIBRARY is used in java to load the library:
##      System.loadLibrary("LIBRARY");
IF(APPLE)
  SET_TARGET_PROPERTIES(${SWIG_MODULE_<module_name>_REAL_NAME} PROPERTIES
    PREFIX "lib" SUFFIX ".jnilib")
ELSEIF(WIN32)
  SET_TARGET_PROPERTIES(${SWIG_MODULE_<module_name>_REAL_NAME} PROPERTIES
    PREFIX "" SUFFIX ".dll")
ELSEIF(UNIX)
  SET_TARGET_PROPERTIES(${SWIG_MODULE_<module_name>_REAL_NAME} PROPERTIES
    PREFIX "lib" SUFFIX ".so")
ENDIF(APPLE)

For Python wrappers, there is no need to rename the target under OSX,
Linux, and Windows.

For Ruby, I have never tried!

-- 
Tristan Carel
Music with dinner is an insult both to the cook and the violinist.
http://www.tristancarel.com