classpath/tools/tools.zip:0:0: fatal error: not a valid Java .class file

[Jonathan Wakely]

On 12 May 2016 at 05:50, YuGiOhJCJ Mailing-List wrote:
> OK, I finally found why I got this error message.
> When fastjar 0.94 is installed on my system, if I try to build gcc 5.3.0, I got this error.
> However, if I remove fastjar from my system, building gcc works fine.
>
> So, I guess that when fastjar is installed on my system, the building system of gcc automatically use this external program in order to manage jar files.
>
> Is there a way to configure the building system of gcc in order to avoid using this external fastjar version please?

Does adding JAR=no to the configure command work?