Initial commit Ji Gong

3 files changed, 41 insertions, 0 deletions

diff --git a/README.JEP161.txt b/README.JEP161.txt
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+JEP 161 got included in OpenJDK 8 M7 2013/06/13 (b94) 
+Feature Complete milestone http://openjdk.java.net/projects/jdk8/milestones
+thus... it should be possible to compile a compact1 profile using the openjdk 8 sourcecode without the modular system added using jigsaw
diff --git a/README.JVM.txt b/README.JVM.txt
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+(03:06:24 PM) xranby: its a bit undocumented the key is that there exist a jvm.cfg file inside the jre directory
+(03:06:53 PM) xranby: this file lists all folders inside java/jre/lib/<arch>/* that contains a libjvm.so
+(03:07:12 PM) xranby: the top most -myawesomejvm KNOWN line becomes the default
+(03:07:29 PM) xranby: the libjvm.so itself implement the JNI spec
+(03:08:26 PM) xranby: basically according to this book: http://web.archive.org/web/20120905183616/http://java.sun.com/docs/books/jni/download/jni.pdf
+(03:08:43 PM) xranby: + all added JEP's & JSR's over time + some openjdk undocumented apis
+(03:08:56 PM) xranby: jamvm and cacao for example implements this
+(03:09:17 PM) xranby: and allows you to place the jamvm, cacao, avian libjvm.so inside one subfolder
+(03:09:25 PM) xranby: and add a line -jamvm KNOWN to the jvm.cfg
+(03:09:54 PM) xranby: during builds... there was previously a mecanism inside the openjdk source
+(03:10:19 PM) xranby: if you defined ALT_HOTSPOT_IMPORT_PATH or similar pointing to a prebuilt libjvm.so
+(03:10:27 PM) xranby: it would import that one instead of building it from scratch
+(03:10:39 PM) xranby: this mechanism changes from time to time
+(03:10:59 PM) xranby: at present it require a directory that looks like a real JDK installation
+(03:11:11 PM) xranby: (although it only copys the libjvm.so)
+(03:11:29 PM) xranby: we use this trick to build openjdk using jamvm using the icedtea build system
+(03:11:48 PM) xranby: all details are found inside the icedtea project
+(03:12:08 PM) xranby: hence makes it possible to build openjdk on platforms without hotspot
+(03:12:20 PM) xranby: ... i will not go into details on how to bootstrap openjdk
+(03:12:27 PM) xranby: from scratch on a new architecture
+(03:12:33 PM) xranby: .. its black magic
+(03:13:21 PM) xranby: basically you do   GCC -> GCJ -> ECJ -> ANT -> bootstrap openjdk subset compiled using ecj -> openjdk
+(03:13:31 PM) xranby: and deal with all cyclic complexity
+
diff --git a/README.Jigsaw.txt b/README.Jigsaw.txt
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+apt-get build-dep openjdk-7-jdk
+
+hg clone http://hg.openjdk.java.net/jigsaw/jigsaw
+cd jigsaw/
+sh ./get_source.sh 
+
+#./configure
+#    --enable-unlimited-crypto
+#    --disable-headful
+
+sh configure && make all
+make test TEST=jdk_jigsaw
+
+-> ./jdk/make/modules/modules.config