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Ubuntu12.04下jamvm1.5.4+classpath-0.98成功运行 helloworld.class

时间:2014-06-17 22:13:53      阅读:394      评论:0      收藏:0      [点我收藏+]

标签:ubuntu   jamvm   classpath   libffi   

经过两天的努力,总于在ubuntu下面编译好classpath-0.98与jamvm1.5.4,并能成功的执行类文件:jamvm hellowold,当屏幕上打印出“hello world!”的时候,按捺不住一阵兴奋!在这两天中,执行jamvm hellowold始终被有三类异常:

1) Exceptionoccurred while VM initialising
java/lang/NoClassDefFoundError: java/lang/Thread 

2) Exception occured while printing exception(java/lang/NoClassDefFoundError)... 

Original exception wasjava/lang/UnsatisfiedLinkError 

3)segment fault

对于其中异常1), 2) 我推测可能是classpath等路径设错,我通过baidu,google,bing等搜索工具查询国内外相关问题,得出一个解决方法是:

通过jamvm –version 命令查询路径信息:

$ jamvm-version

javaversion "1.5.0"

JamVMversion 1.5.4

Copyright(C) 2003-2010 Robert Lougher <rob@jamvm.org.uk>

Thisprogram is free software; you can redistribute it and/or

modify itunder the terms of the GNU General Public License

aspublished by the Free Software Foundation; either version 2,

or (atyour option) any later version.

 

Thisprogram is distributed in the hope that it will be useful,

butWITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITYor FITNESS FOR A PARTICULAR PURPOSE.  Seethe

GNUGeneral Public License for more details.

Buildinformation:

ExecutionEngine: inline-threaded interpreter with stack-caching

Compiledwith: gcc 4.6.3

BootLibrary Path: /usr/local/classpath/lib/classpath

BootClass Path:

 /usr/local/jamvm/share/jamvm/classes.zip:/usr/local/classpath/share/classpath/glibj.zip

在执行jamvm helloword之前需要设置两个变量:

export LD_LIBRARY_PATH=/usr/local/classpath/lib/classpath:$LD_LIBRARY_PATH

export  BOOTCLASSPATH=/usr/local/jamvm/share/jamvm/classes.zip:/usr/local/classpath/share/classpath/glibj.zip

 

但是我按照这种方法来设置两个环境变量,还是解决不了问题;

关于异常3) 这个一定是jamvm本身的bug,除非单步条件,否则可能无法定位其问题,况且即使定位,也觉得无法解决。

在一筹莫展之时,突然搜索到一篇国际友人帖子,该贴对我的成功起了决定性的作用,真是山重水复疑无路,柳暗花明又一村!!!感谢该贴的作者!url如下:

http://www.webos-internals.org/wiki/Building_JamVM_and_GNU_Classpath_and_Jikes_(for_Java_support_in_webOS)_with_scratchbox2

具体来说,该文提到一个很关键的地方,就是在编jamvm的时候,需要enable libffi模块,否则会引起段错误! 

我按照该文的步骤,一步一步走下来,最终得到了自己想要的结果!该文的应该用场景是arm,并且可以带gui,gtk等应用,而我的应用场景比较简单,即在x86下面不带gui的应该,故而我的编译和他有一些差别,具体步骤如下:

1.       classpath相关操作

$ cd~/work/free

$ wgetftp://ftp.gnu.org/gnu/classpath/classpath-0.98.tar.gz

$ tarxzvf classpath-0.98.tar.gz

$ cdclasspath-0.98

$ ./configure--disable-examples --without-x --disable-qt-peer --disable-gtk-peer--disable-gconf-peer --disable-plugin --disable-alsa --disable-dssi

$ make -i

$ sudomake install -i

注: classpath的默认安装路径为/usr/local/classpath

 

2.       jamvm相关操作

$ cd~/work/free

$ wget ftp://sourceware.org/pub/libffi/libffi-3.0.10.tar.gz

$ tarxzvf libffi-3.0.10.tar.gz

$ cdlibffi-3.0.10

$ ./configure--prefix=/usr/local

$ make

$ sudomake install

$ sudo cpinclude/ffi_common.h /usr/local/include/

$cdi686-pc-linux-gnu/

$ cdinclude/

$ sudo cpffi.h /usr/local/include

$ cd../src/86

$ sudo cpffitarget.h /usr/local/include

$ cd~/work/free

$ wget http://freefr.dl.sourceforge.net/project/jamvm/jamvm/JamVM%201.5.4/jamvm-1.5.4.tar.gz

$ tarxzvf jamvm-1.5.4.tar.gz

$ cdjamvm-1.5.4

$ CPPFLAGS="-I/usr/local/include"

$ ./configure --with-classpath-install-dir=/usr/local/classpath -enable-ffi

$ make

$ sudomake install


3.       验证jamvm

1> 已知源代码~/work/free/jamvm-1.5.4/java/helloworld.java:

public class helloworld {

    public static void main(String[] args) {

        System.out.println(“hello world!”);

    }

}

 

2> 编译 javac helloworld.java

生产helloworld.class

 

3> 执行jamvm helloworld 打印结果:

helloworld!

 

此时我们在查看CLASSPATH, LD_LIBRARY_PATH,发现:

lihan@master:~$echo $CLASSPATH

 

lihan@master:~$echo $LD_LIBRARY_PATH

:/usr/local/lib

 

cd ~/work/free/jamvm-1.5.4/java/

lihan@master:~/work/free/jamvm-1.5.4/java$jamvm test

helloworld!

可以看到,CLASSPATH与LD_LIBRARY_PATH并不需要设置成之前说的, jamvm –version显示的那些路径!!!

 

最后,希望该文能对遇到同样问题的兄弟们起到一定帮助!

Ubuntu12.04下jamvm1.5.4+classpath-0.98成功运行 helloworld.class,布布扣,bubuko.com

Ubuntu12.04下jamvm1.5.4+classpath-0.98成功运行 helloworld.class

标签:ubuntu   jamvm   classpath   libffi   

原文地址:http://blog.csdn.net/lihancheng/article/details/31408611

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