Such interfaces need only be provided for those libraries which contain functions that are directly called by the Java application. gvSIG and SEXTANTE) to C /C++ libraries like PROJ.4, a Java Native Interface (JNI) wrapper is needed. In addition, to provide direct access from Java (i.e. separately for every supported operating system (Linux, Mac OS X and Windows). They have to be compiled as "native binaries", i.e. These include PROJ.4 for reprojection of spatial data, and the GRASS and SAGA GIS modules (for use from within SEXTANTE). GvSIG CE uses some external programs and function libraries that are written in C/C++ instead of Java. Note: Make sure to read through and complete all the steps on the page about Setting up the GNU Compiler Collection, before you continue.
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