On Thu, 3 Mar 2022 13:32:33 GMT, Julian Waters <jwat...@openjdk.org> wrote:

>> make/autoconf/configure line 298:
>> 
>>> 296:     exit 1
>>> 297:   else
>>> 298:     echo "Warning: You are using unsafe autoconf cross-compilation 
>>> flags."
>> 
>> The autoconf flags are not really unsafe, they are just misleadingly named. 
>> I'd rather see that you restore "legacy" in this output, and the 
>> conf_legacy_crosscompile variable name.
>
> Would it be better if I changed that to say the flags are misleading, or if I 
> reverted it back to legacy in that case? (Since that seems to be the primary 
> concern with using them)

As the build documentation says, the standard autoconf tripled was created for 
building Canadian cross compilers (i.e. cross-compiling a cross-compiler). This 
means that they use "host" for what we call "target", and they use "target" for 
something that is not relevant for us. This caused a lot of confusion early on 
when OpenJDK started using autoconf.

If you know what you are doing, there's nothing inherently *wrong* with using 
the autoconf triplet. It's just confusing, due to the name clash of "target".

If you think this is not clear enough from the documenation and need to add 
something to the warnings printed by the configure wrapper, sure, go ahead and 
add a line about how this can be confusing. 

But it is not unsafe.

-------------

PR: https://git.openjdk.java.net/jdk/pull/7656

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