fix for CLASSPATH/classpath switch behaviour

[Mark Wielaard]

Hi,

On Fri, 2002-02-08 at 05:48, Tom Tromey wrote:
> 
> Does the Sun javac have a way to override the system class path?
> What is it?
That is called the Bootstrap classes in Sun speak and it is overriden
with the -bootclasspath (for javac) or -Xbootclasspath (for java).

In Sun speak you have four different "class inputs".
- Bootstrap, the core classes defined with -(X)bootstrap
- Extension, jars used to resolve Classpath entries in jar Manifest
  files with -extdirs.
- User, added with -classpath to the above two.
- Source, used with javac -sourcepath to override the above.

Recent versions of jikes also define these options.
>From the jikes manual page:

       Jikes has several options related to classpath  searching.
       The  -bootclasspath, -extdirs, and -sourcepath options are
       the same as in javac.  In addition to being  specified  on
       the command line, the environment variables BOOTCLASSPATH,
       EXTDIRS, and SOURCEPATH may also be used to specify values
       for  these  options,  respectively.   Jikes  also  has the
       -classpath option as  in  javac,  with  the  corresponding
       environment variable CLASSPATH.  The classpath may also be
       specified in the environment variable JIKESPATH,  although
       this use is discouraged.  If JIKESPATH and CLASSPATH coex­
       ist, preference will  be  given  to  JIKESPATH.   A  value
       specified  on  the  command  line  will be always be given
       preference over the value  of  any  environment  variable.
       All  the  directories and files specified in these options
       or environment variables  must  be  in  a  colon-separated
       list, e.g., ".:$HOME/java/jre/lib/rt.jar".

More info can be found at
<http://java.sun.com/j2se/1.4/docs/tooldocs/findingclasses.html>
or in the javac man page
<http://java.sun.com/j2se/1.4/docs/tooldocs/solaris/javac.html>

It would be great to have something similar for gcj/gij.

Cheers,

Mark