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The GNU Compiler for Java (GCJ) is a discontinued free compiler for the Java programming language. It was part of the GNU Compiler Collection. [3][4] GCJ compiles Java source code to Java virtual machine (JVM) bytecode or to machine code for a number of CPU architectures. It could also compile class files and whole JARs that contain bytecode ...
- Introduction
- History
- Status
- Binary Compatibility Abi
- Tips and Hints
- Unrealized Gcj Improvement Opportunities
- Hackers
- External Links
GCJ stands for the GNU Compiler for the Java Programming Language. Within GCC, it comprises the Java programming language front-end (gcc/java), a runtime library (libjava) and other helper libraries (boehm-gc, libffi and zlib). Most of the runtime library implementation is shared with the GNU Classpathproject. GCJ can compile Java source files to n...
In the late 1990s, Cygnus Solutions started a project to create an ahead-of-time (AoT) native compiler for Java based on GCC and primarily targeted at embedded systems. The first version was released in 1998. It was mergedinto the GCC CVS repository by late 2000. An early name for GCJ used to be gjavac.
GCJ supports most of the Java Language Specification and a fairly large number of runtime APIs when compared to Sun's JDK 1.4. It does not have any support for the newer language and runtime features introduced in JDK 1.5. GCJ has been ported to many architectures, though not as many as those supported by the C front-end in GCC. GCJ_Bug_Digest(not ...
GCC 4.0 includes a preview implementation of a new Binary Compatibility ABI for GCJ for pre-compiled Java applications. It is enabled by compiling Java bytecode using the -findirect-dispatch flag (and right now, some other flags, although we hope to simplify that). See How_to_BC_compile_with_GCJfor full details.
This section is for useful information for users and/or developers of gcj which hasn't yet made it into the documentation (which, incidentally, can be accessed with "info gcj" on a gnu system). 1. Debugging_tips_for_libgcj- Explains how to debug both Java code that has been compiled to native code and interpreted bytecode 2. Debugging_the_Java_fron...
Ideas about how GCJ could be improved. 1. GCJ_Optimization_Ideas- Ideas about how to optimize code generated by the gcj compiler.
Here is an alphabetically ordered list of some current and past GCJ hackers: 1. Adam Megacz (blog) 2. Alexandre Petit-Bianco (blog) 3. Andrew Haley (blog) 4. Anthony Green (blog) 5. Bryce McKinlay 6. David Daney 7. Graydon Hoare (blog) 8. Hans Boehm 9. Jeff Sturm 10. Mark Wielaard (blog) 11. Michael Koch (blog) 12. Mohan Embar 13. Per Bothner 14. R...
Oct 3, 2017 · To summarize the answers below: If you want to compile Java, use the Oracle compiler javac or the built in compilers in one of the common IDEs like Eclipse or Netbeans. These compilers tend to be maintained better than gcj. @Jochen is right. gcj has been removed from GCC since GCC 7 (not yet released).
GCJ will compile both source (.java) and bytecode (.class) files. However, in many cases the native code produced by compiling from source is better optimized than that compiled from .class files. The reason is that when you compile to bytecode you lose a lot of information about program structure etc.
Sep 11, 2006 · GCJ is a portable, optimizing, ahead-of-time compiler for the Java Programming Language. It can compile Java source code to Java bytecode (class files) or directly to native machine code, and Java bytecode to native machine code. Compiled applications are linked with the GCJ runtime, libgcj, which provides the core class libraries, a garbage ...
GCJ has two parts: the compiler and the runtime support library. The compiler includes these commands: gcj the GCJ compiler gcjh generates header files from Java class files jcf-dump prints information about Java class files jv-scan prints information about Java source files The runtime support includes: libgcj.so.3 GCJ runtime suppport library ...
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This manual describes how to use gcj, the GNU compiler for the Java programming language. gcj can generate both .class files and object files, and it can read both Java source code and .class files. Invoking rmic: Generate stubs for Remote Method Invocation. Invoking rmiregistry: The remote object registry.
