Configuration script unable to detect boot JDK's modules support

[Alan Bateman]

Are you sure your boot JDK is jdk-9+111? If it doesn't support -Xpatch 
then it's probably older build.

In any case, the boot JDK should be JDK 8. Yes, the JDK can build itself 
but it's can be very fragile to attempt to build it with a JDK 9 that 
isn't quite in sync (esp. as command-line options are changing).

-Alan

On 31/03/2016 08:56, Filipp Zhinkin wrote:
> Hi all,
>
> I'm trying to build OpenJDK from latest sources using JDK9-b111 as a boot JDK
> and configuration script is not able to detect modules support:
>
> $ bash configure --enable-option-checking=fatal
> --with-jvm-variants=server --with-debug-level=release
> --disable-headful --with-boot-jdk=/home/filipp/Downloads/bootdir/jdk-9
> --with-jtreg=/home/filipp/Development/openjdk/jtreg
> ...
> $ grep modules build/linux-x86_64-normal-server-release/configure.log
> checking if Boot JDK supports modules... no
>
> I've looked into common/autoconf/boot-jdk.m4 to find out how modules
> support is detected and we simply pass '-Xpatch:' to JVM [1]:
>
> jdk-9/bin/java -Xpatch: -version
> Bad value for -Xpatch.
> Error: Could not create the Java Virtual Machine.
> Error: A fatal exception has occurred. Program will exit.
>
> Am I missing something or that check should actually pass -Xpatch:blablabla?
>
> Regards,
> Filipp.
>
> [1] http://hg.openjdk.java.net/jdk9/jdk9/file/03543a758cd5/common/autoconf/boot-jdk.m4#l308