Re: How to cache output of the compiler aka ccache

[Vinzent 'Gadget' Hoefler <nntp-2005-03@t-domaingrabbing.de>]

Robert A Duff wrote:

> But I think Java compilers can be trusted to rebuild
> properly, just like Ada compilers.

What makes you think that?

|hovi@jellix:~/src/java/test> rm screencard/exceptions/CaffeineUnderflow.class
|hovi@jellix:~/src/java/test> javac screencard/Test.java
|hovi@jellix:~/src/java/test> java screencard/Test
|Exception in thread "main" java.lang.NoClassDefFoundError: screencard/exceptions/CaffeineUnderflow
|        at screencard.Test.main(Test.java:42)
|hovi@jellix:~/src/java/test> javac screencard/exceptions/CaffeineUnderflow.java
|hovi@jellix:~/src/java/test> java screencard/Test
|Target: 3015/192/1000
|[...]

It obviously fails to recompile missing dependencies. From my tests
it also seems to ignore file dates. So I'd say, the "Java Build System"
is non-existent.
Well, considering that Java is designed to be able can load classes at
runtime (meaning: they are not required to have been compiled before they
need to be loaded) this isn't a very big surprise. What's more surprising
in this example: It fails to load an exception class which isn't even
raised.


Vinzent.

-- 
worst case: The wrong assumption there actually is one.