On 12/04/2015 09:41 AM, Alan Bateman wrote:
On 04/12/2015 08:22, Cédric Champeau wrote:
Obviously compiling a single JDK 9 module-info file seems
pretty cheap, but if you think about the fact that you will want to
have a
JDK 8 installed to compile your classes, plus a JDK 9 Jigsaw
installed to
compile the descriptor, and then add that you have to fork the
compilers,
the cost of this operation is visible both in terms of infrastructure
and
build time.
One thing to keep in mind is JEP 247 and the new javac -release
option. Yes, a big change from today's world where the older JDK is
used to build but it opens up the possibility for these more
complicated builds to have only one JDK on the build system. There's a
connection to the multi-release JAR proposal in JEP 238 too.
-Alan
Just a related question:
Do you expect the class file format to change in JDK9 and for what
features? If it is only for supporting the module-info.class then would
something like the following be possible:
javac -source 9 -target 8 -mp modlib ...
...and produce JDK8 compatible class files + JDK9 compatible
module-info.class file(s) ?
Regards, Peter
