[CMake] mixed java/c project.

[George Neill]

Hi All,

On Sat, Oct 18, 2008 at 2:01 AM, George Neill <georgen at neillnet.com> wrote:
> Hi all,
>
>  I am trying to convert a project to cmake which has mixed java and c
> compilations.  Here's the project layout,
>
>  project/
>     -> src/c
>     -> src/java
>
> I get the java project to build fine if I use the top level
> CMakeLists.txt file, but if I use add_subdirectory(src/java) in the
> top level CMakeLists.txt and create a CMakeLists.txt file in src/java
> it appears to break (below is the error)
>
> The -d option of the javac command line appears to be coming out wrong
> ... CMakeFiles/luajava.dir/org/keplerproject/luajava should actually
> be src/java/CMakeFiles/luajava.dir/org/keplerproject/luajava
>
> I took a look in Modules/CMakeJavaInformation.cmake and here's what I found,
>
> # compile a Java file into an object file
> IF(NOT CMAKE_Java_COMPILE_OBJECT)
>  SET(CMAKE_Java_COMPILE_OBJECT
>    "<CMAKE_Java_COMPILER>   <FLAGS> <SOURCE> -d <OBJECT_DIR>")
> ENDIF(NOT CMAKE_Java_COMPILE_OBJECT)
>
> OBJECT_DIR seems to be the wrong place,  any ideas on the best way to fix this?

Well, it looks like this isn't a new issue.  (
http://www.mail-archive.com/cmake@cmake.org/msg02564.html )

I was able to get by it by doing this,

SET(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
SET(CMAKE_USER_MAKE_RULES_OVERRIDE "override")

my override.cmake contains,

# compile a Java file into an object file
IF(NOT CMAKE_Java_COMPILE_OBJECT)
  SET(CMAKE_Java_COMPILE_OBJECT
    "<CMAKE_Java_COMPILER>   <FLAGS> <SOURCE> -d
<CMAKE_CURRENT_BINARY_DIR>/<OBJECT_DIR>")
ENDIF(NOT CMAKE_Java_COMPILE_OBJECT)

Is this acceptable, or should I be doing something else?

Thanks,
George.