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javah: C Header and Stub File

Generator

The javah tool generates C header files and stub C source files from a Java class.

These files provide the connections that allow your Java

and C code to interact.

For a complete description of the tool and its use, see the Sun Microsystems

documentation for javah.

Synopsis

javah [ options ] classname ...

Compaq Extensions to Standard Java

NonStop

Server for Java adds the following options to javah:

-l stubfile

This option creates stubs specific to Compaq. This option is required only if

your JNI library will contain object files with duplicate names (for example,

two files named trace.o); however, you can also use this option to reduce

the size of the compiled Java Virtual Machine (JVM) code.

If you use this option, you must ensure that the resulting stub file name ends

in _dlsym.c. The stub file name ends in _dlsym.c by default if you use

the -jni option, but if you use the -stubs option, you must also use the

-o option to give the stub file a name that ends in _dlsym.c; for example:

-l mylib -stubs -o mylib_dlsym.c

To reduce the size of the compiled JVM code, follow these steps:

Use the -l option to produce a stubfile_dlsym.c file (as in the

preceding example).

Put the stubfile_dlsym.o in your library.2.

Use the /usr/tandem/java/install/Makefile to relink the

JVM.

The Makefile links the stubfile_dlsym.o file with the JVM, and

the linker links only those files in the library that are needed to resolve

unresolved external references.