[Adding build-dev to let them know others are seeing this. I'm not on jigsaw-dev
though so this might not make it there.]
Hi Peter,
I ran into this myself the other day and had a wrestling match with it. There's
a bug in the build system on this:
https://bugs.openjdk.java.net/browse/JDK-8066761
My understanding is that this has to do with timestamps on the checked-out
source files vs. the class files in the boot JDK. With 8u20 as boot, all the
class files are out of date w.r.t. the source files so everything is rebuilt.
With 8u25, some class files might be newer than the source files, if you've been
using the same source tree for a long time (as many of us have).
The workaround is to touch all the source files in the jdk repo before doing a
clean build:
$ cd jdk; hg manifest | xargs touch
or do
$ cd jdk; hg update null; hg update tip
to re-checkout all the files.
The root cause seems to be inadvertent dependency checks against classes in the
boot JDK, which cause the build to mix in old class files from the boot JDK.
Obviously if you do a fresh build, everything ought to be out of date,
regardless of which boot JDK is in use.
s'marks
On 12/6/14 11:20 AM, Peter Levart wrote:
Hi,
I thought I might inform you that recent checkout of JDK9 (with modular RT
images) fails to build with JDK8u25 as bootstrap JDK. With JDK8u20 it works
correctly. Tried on Linux and Windows. The configuration on Linux is:
Configuration summary:
* Debug level: release
* HS debug level: product
* JDK variant: normal
* JVM variants: server
* OpenJDK target: OS: linux, CPU architecture: x86, address length: 64
Tools summary:
* Boot JDK: java version "1.8.0_25" Java(TM) SE Runtime Environment
(build 1.8.0_25-b17) Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed
mode) (at /home/peter/Apps64/jdk1.8.0)
* Toolchain: gcc (GNU Compiler Collection)
* C Compiler: Version 4.8.3 (at /usr/bin/gcc)
* C++ Compiler: Version 4.8.3 (at /usr/bin/g++)
Build performance summary:
* Cores to use: 7
* Memory limit: 15757 MB
Here's the build session:
[peter@cube jdk9-dev]$ make CONF=linux-x86_64-normal-server-release images
Building 'linux-x86_64-normal-server-release' (matching
CONF=linux-x86_64-normal-server-release)
Building OpenJDK for target 'images' in configuration
'linux-x86_64-normal-server-release'
Compiling 1 files for BUILD_TOOLS_LANGTOOLS
Compiling 20 properties into resource bundles for jdk.compiler
Compiling 10 properties into resource bundles for jdk.javadoc
Compiling 5 properties into resource bundles for jdk.dev
Compiling 818 files for BUILD_INTERIM_LANGTOOLS
warning: [options] bootstrap class path not set in conjunction with -source 1.6
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
1 warning
warning: [options] bootstrap class path not set in conjunction with -source 1.6
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
Warning: generation and use of skeletons and static stubs for JRMP
is deprecated. Skeletons are unnecessary, and static stubs have
been superseded by dynamically generated stubs. Users are
encouraged to migrate away from using rmic to generate skeletons and static
stubs. See the documentation for java.rmi.server.UnicastRemoteObject.
Creating buildtools/interim_langtools.jar
Compiling 198 files for BUILD_INTERIM_RMIC
Compiling 23 files for BUILD_INTERIM_JIMAGE
Compiling 6 files for BUILD_TOOLS_CORBA
Compiling 141 files for BUILD_IDLJ
/home/peter/work/hg/jdk9-dev/jdk/src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java:230:
error: cannot find symbol
LambdaForm form2 = mh.editor().filterArgumentForm(1+i,
BasicType.basicType(newType));
^
symbol: method editor()
location: variable mh of type BoundMethodHandle
/home/peter/work/hg/jdk9-dev/jdk/src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java:231:
error: cannot find symbol
mh = mh.copyWithExtendL(midType, form2, fn);
^
symbol: method copyWithExtendL(MethodType,LambdaForm,MethodHandle)
location: variable mh of type BoundMethodHandle
/home/peter/work/hg/jdk9-dev/jdk/src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java:250:
error: cannot find symbol
LambdaForm form2 =
mh.editor().filterReturnForm(BasicType.basicType(newType), false);
^
symbol: method editor()
location: variable mh of type BoundMethodHandle
...etc...
It seems that something changed between JDK8u20 and JDK8u25 regarding
bootclasspath handling of javac as the above errors suggest that JDK9 sources
are being compiled against JDK8 classes.
Regards, Peter
