file: INSTALL I. Henry and G. Moody August 2005
Last revised: 12 March 2006
Installation notes for WFDB Java wrappers
If you have not already done so, install the WFDB library, SWIG, and a Java
development kit that supports the Java Native Interface (JNI). The Sun
Java SDK is recommended.
WFDB (http://physionet.org/physiotools/wfdb.shtml)
SWIG (http://www.swig.org/)
Java development kit (http://java.sun.com/)
See 'INSTALL' in the parent of this directory for further information.
To make the wfdb-java module, type:
make
This creates a 'build' directory, copies the contents of the 'conf' directory
there, generates source files for the Java wrappers using SWIG, generates
build/Makefile to manage the build process, and uses it to compile the wrapper
source code into a Java class archive (wfdb.jar) and a shared wrapper library
(libwfdbjava.*).
To install the wfdb-java module, type:
make install
On most platforms you will need root (administrator) privileges to complete
this step. This installs wfdb.jar and libwfdbjava in their expected locations
(/usr/share/java/ and /usr/lib/ respectively).
To test the installation, type:
make check
This command compiles all of the programs in the 'examples' directory, and
runs a Java version of the trivial example program from chapter 1 of the WFDB
Programmer's Guide:
examples/jw examples/psamples
and compares its output with the expected output (in ../examples/psamples.out).
The output of 'make check' is either 'Passed' or 'Failed'. If you run
'examples/jw examples/psamples' directly, its output should be:
995 1011
995 1011
995 1011
995 1011
995 1011
995 1011
995 1011
995 1011
1000 1008
997 1008
The ../examples directory also contains translations into Java of the other
examples from the WFDB Programmer's Guide.
To build a wfdb-java RPM (GNU/Linux only), type:
make rpm
Building wrappers with gcc4
gcc4 seems to have a problem with over-optimizing the wrappers if the "-O2"
flag is used. Unfortunately, autoconf uses "-O2" by default, resulting in
wrappers that will crash in most cases. In order to build a less optimized and
functional wrapper library, the 'CFLAGS' variable must be overridden when
running 'configure' (see Makefile to see how this is done).
Compiling Java code with the wrappers
The wrappers can be used to build standalone programs or .class files. The
difference is that standalone programs contain opcodes that your CPU can
execute directly, and .class files contain Java bytecodes that must be
interpreted at run time by a Java virtual machine (JVM). See examples/Makefile
to see how each type of compilation can be done.
Notes on MS Windows
Windows developers should understand that there are two development paths for
WFDB on Windows (Cygwin and "pure win32" builds), but that only "pure win32"
can be used with the Java wrappers. Cygwin builds of WFDB link against
cygwin1.dll, an alternative to Microsoft's MSVCRT*.dll C runtime library. These
two libraries are mutually exclusive; binaries must be linked to one or the
other only. Since Sun's JRE links against MSVCRT*.dll, the WFDB JNI "glue" dll
and the WFDB dll must also link against MSVCRT*.dll.