FPC JVM
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Overview
The FPC backend for the Java Virtual Machine (JVM) generates Java byte code that conforms to the specifications of the JDK 1.5 (and later). While not all FPC language features work when targeting the JVM, most do (or will in the future) and we have done our best to introduce as few differences as possible.
This FPC JVM backend is not related to Project Cooper by RemObjects, nor does FPC now support the Oxygene language.
Snapshots
You can find compiled snapshots below (svn r19598, 2011/11/07). These are cross-compilers from the mentioned platform to the JVM. The generated code is not specific to the JVM running on that particular platform.
Installation instructions:
- unpack the archive file
- adjust the path in the unpacked bin\fpc.cfg (Windows) or etc/fpc.cfg (other platforms) so it points to the directory where you unpacked the file
- use the included ppcjvm compiler to compile sources
A number of test files used during development of the JVM backend can be found at http://svn.freepascal.org/svn/fpc/branches/jvmbackend/tests/test/jvm
Snapshot download links:
- Windows (i386) (slower mirror)
- Mac OS X (universal binary, Mac OS X 10.5 or later) (slower mirror)
- Linux (i386) (slower mirror)
If your platform is not listed above, or if you are only interested in building the compiler/rtl from source, a separate archive that only contains the compiled Java components (Jasmin, javapp, BCEL) is also available. Building instructions are listed below.
- FPC JVM utilities (you do not need this if you already downloaded one of the files above)
Quick start
Compile a test program
The used example is http://svn.freepascal.org/svn/fpc/branches/jvmbackend/tests/test/jvm/trange1.pp
ppcjvm -O2 -g trange1
Run it on Windows
java -cp C:\full\path\to\fpcjvm\units\rtl\jvm-java;. trange1
Replace C:\full\path\to\fpcjvm\units\rtl\jvm-java with the full path to the units\rtl\jvm-java directory from the snapshot archive.
Run it on Unix-like platforms
java -cp /full/path/to/fpcjvm/units/rtl/jvm-java:. trange1
Replace /full/path/to/fpcjvm/units/rtl/jvm-java with the full path to the units/rtl/jvm-java directory from the snapshot archive.
Details
See the usage information page for more details.
