To begin with, building Javac results in a .class file with a > 1.5
version ID. That's easy to fix if you alter the makefile to change
the version ID:
--- /tmp/compiler/Makefile 2006-11-12 02:14:13.000000000 +0000
+++ ./Makefile 2006-11-20 17:08:06.000000000 +0000
@@ -147,7 +147,7 @@
$(JAVAC) -d $(BUILD_BOOTCLASSES) -source $(COMPILER_SOURCE_LEVEL) -g:source,lines @$(BUILD_JAVAC_SRCFILES)
$(MKDIR) -p $(BUILD_CLASSES)
$(JAVA) -cp $(BUILD_BOOTCLASSES):$(SRC_CLASSES) com.sun.tools.javac.Main \
- -d $(BUILD_CLASSES) -g:source,lines @$(BUILD_JAVAC_SRCFILES)
+ -d $(BUILD_CLASSES) -source $(COMPILER_SOURCE_LEVEL) -target $(COMPILER_SOURCE_LEVEL) -g:source,lines @$(BUILD_JAVAC_SRCFILES)
( $(ECHO) "Main-Class: com.sun.tools.javac.Main" ; \
$(ECHO) "Built-By: $$USER" ; \
$(ECHO) "Built-At: `date`" ) > $(BUILD)/javac.MF
Then you have something that will run on a 1.5 runtime.
Unfortunately, with Classpath you soon come across another problem:
--------------------------------------------------------------------------------
java.lang.ExceptionInInitializerError
at java.lang.Class.initializeClass(natClass.cc:754)
at com.sun.tools.javac.main.JavaCompiler.initProcessAnnotations(JavaCompiler.java:891)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:741)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:296)
at com.sun.tools.javac.main.Main.compile(Main.java:287)
at com.sun.tools.javac.Main.compile(Main.java:86)
at com.sun.tools.javac.Main.main(Main.java:71)
Caused by: java.util.regex.PatternSyntaxException: At position 7 in regular expression pattern:
At position 0 in regular expression pattern:
unsupported name all
(\P{all})+
^
at java.util.regex.Pattern.<init>(Pattern.java:113)
at java.util.regex.Pattern.compile(Pattern.java:152)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.<clinit>(JavacProcessingEnvironment.java:1218)
at java.lang.Class.initializeClass(natClass.cc:746)
...7 more
Caused by: gnu.java.util.regex.REException: At position 7 in regular expression pattern:
At position 0 in regular expression pattern:
unsupported name all
at gnu.java.util.regex.RE.getRETokenNamedProperty(RE.java:1490)
at gnu.java.util.regex.RE.initialize(RE.java:1060)
at gnu.java.util.regex.RE.<init>(RE.java:323)
at gnu.java.util.regex.RE.initialize(RE.java:716)
at gnu.java.util.regex.RE.<init>(RE.java:323)
at java.util.regex.Pattern.<init>(Pattern.java:108)
...10 more
Caused by: gnu.java.util.regex.REException: At position 0 in regular expression pattern:
unsupported name all
at gnu.java.util.regex.RETokenNamedProperty.getHandler(RETokenNamedProperty.java:263)
at gnu.java.util.regex.RETokenNamedProperty.<init>(RETokenNamedProperty.java:97)
at gnu.java.util.regex.RE.getRETokenNamedProperty(RE.java:1486)
...15 more
--------------------------------------------------------------------------------
which is caused by this line:
private static final Pattern noMatches = Pattern.compile("(\\P{all})+");
"all" doesn't seem to be a well-defined regular-expression construct.
http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html
doesn't mention it, but I guess it's something like:
Index: regex/RETokenNamedProperty.java
===================================================================
*** regex/RETokenNamedProperty.java (revision 118943)
--- regex/RETokenNamedProperty.java (working copy)
*************** final class RETokenNamedProperty extends
*** 170,175 ****
--- 170,179 ----
name.equals("Space") ) {
return new POSIXHandler(name);
}
+
+ if (name.equals("all"))
+ return new AllHandler();
+
if (name.startsWith("In")) {
try {
name = name.substring(2);
*************** final class RETokenNamedProperty extends
*** 312,315 ****
--- 316,325 ----
}
}
+ private static class AllHandler extends Handler {
+ public boolean includes(char c)
+ {
+ return true;
+ }
+ }
}
Once we're past that, all goes well until
java.lang.NoClassDefFoundError: sun.misc.Service
at com.sun.tools.javac.processing.JavacProcessingEnvironment.initProcessorIterator(JavacProcessingEnvironment.java:209)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.<init>(JavacProcessingEnvironment.java:159)
at com.sun.tools.javac.main.JavaCompiler.initProcessAnnotations(JavaCompiler.java:891)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:741)
at com.sun.tools.javac.main.Main.compile(Main.java:370)
at com.sun.tools.javac.main.Main.compile(Main.java:296)
at com.sun.tools.javac.main.Main.compile(Main.java:287)
at com.sun.tools.javac.Main.compile(Main.java:86)
at com.sun.tools.javac.Main.main(Main.java:71)
which is caused by
Iterator<Processor> it =
Service.providers(Processor.class, processorCL);
As I understand it, sun.misc.Service has now been promoted to
java.util.Service, but I can't anywhere find a specification for this
class.
The only private APIs used in the compiler are:
sun/tools/javac/model/AnnotationProxyMaker.java:import sun.reflect.annotation.*;
sun/tools/javac/processing/JavacProcessingEnvironment.java:import sun.misc.Service;
sun/tools/javac/processing/JavacProcessingEnvironment.java:import sun.misc.ServiceConfigurationError;
So, I imagine it shouldn't be terribly hard to remove these dependencies.
Andrew.
