Bug 165753

Summary:	gcj generates different anonymous class names to sun
Product:	[Fedora] Fedora	Reporter:	Andrew Cagney <cagney>
Component:	gcc	Assignee:	Andrew Haley <aph>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	medium
Version:	6	CC:	jakub, tromey
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-03-30 19:22:07 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Andrew Cagney 2005-08-11 19:36:16 UTC

[there should be a gcc-java category :-)]

Given the java code:

import java.util.Observer;
import java.util.Observable;
class x
{
    Observer y = new Observer () {
	    public void update (Observable v, Object o) { }
	};
    void function () {
	class O implements Observer {
	    public void update (Observable v, Object o) { }
	};
    }
}

GCJ creates the .class files:

$ gcj -C x.java
$ ls *.class
x$1.class x$2$O.class x.class

where as sun's compiler creates:

x$1.class x$1O.class x.class

Comment 2 Andrew Cagney 2005-08-11 20:47:34 UTC

FYI, ECJ exibits behavior consistent with sun (so presumably implemented the
same algorithm).

I'd assume this is a pedantic language-lawyer edge case (which is why I set the
severity to "low" :-).

Comment 3 Tom Tromey 2006-01-04 20:43:22 UTC

AFAIK there's no spec or requirement for inner class names.
In fact I don't recall ever seeing that Sun's approach is documented.

Comment 4 Christian Iseli 2007-01-22 11:59:38 UTC

This report targets the FC3 or FC4 products, which have now been EOL'd.

Could you please check that it still applies to a current Fedora release, and
either update the target product or close it ?

Thanks.

Comment 5 Tom Tromey 2007-03-08 19:14:12 UTC

This still affects FC5 and FC6.  I set the version field here to fc6.

In F7 the inner class names are dependent on what the Eclipse compiler does.
If they are identical to sun, per comment #2, then this bug will be
fixed there.

In any case the names here are not part of the spec.
Fixing this in an older gcj is pretty hard.  I don't think anyone
will bother.

Comment 6 Jakub Jelinek 2007-03-12 12:52:11 UTC

I don't think it is even desirable to change this in FC5/FC6, there we primarily
need to avoid ABI breakages and need to be compatible with FC5 resp. FC6 gcj.

Comment 7 Tom Tromey 2007-03-30 19:22:07 UTC

I agree.  I am closing this.
I chose "wontfix", but I don't really know which resolution
is most appropriate.