Problems compiling abcl-1.6.1

Mark Evenson evenson at
Tue Apr 28 17:58:56 UTC 2020

[For some reason Greg’s message wasn’t delivered via email, so I am replying “out of band” without the proper SMTP headers.]

> I am an ABCL user, but by no means an expert.  I just unpacked the source
> zip file and tried to compile it without success. I am using Java 14.0.1
> and Ant 1.9.6. The resulting output is attached.	

buildfile: C:\Users\baryza\__Library\Armed_Bear_Lisp\abcl-src-1.6.1\build.xml

    [javac] Compiling 271 source files to C:\Users\baryza\__Library\Armed_Bear_Lisp\abcl-src-1.6.1\build\classes
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 6
    [javac] error: Source option 6 is no longer supported. Use 7 or later.
    [javac] error: Target option 6 is no longer supported. Use 7 or later.

For Java 14, we need to tell the compiler to target the right source compatibility. 

There is a script in `ci/create-abcl-properties.bash` that works with Bash to do configuration, but I see from your logs that you are running under Windows.

So do the steps manually:

1.  copy `` to ``

2.  Change the line with `abcl.javac.source` to read


Then you should be able to compile (or at least get past this error).

Not sure what is going on with the mailing list…

"A screaming comes across the sky.  It has happened before but there is nothing 
to compare to it now."

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