+# find the superclasses of a platform class
+#superclass_%:
+# @if [ "$*" = "org.ibex.plat.Darwin" ]; then echo org.ibex.plat.OpenGL; fi
+# @echo $*
+# @grep -s extends src/$(subst .,/,$*).java | sed s_.\*extends\ __ | head -n 1 | sed s_\ .\*__ |\
+# xargs --replace make -s superclass_org.ibex.plat.{}
+
+plat_classes_Platform := org.ibex.plat.Platform
+plat_classes_AWT := org.ibex.plat.AWT $(plat_classes_Platform)
+plat_classes_Java2 := org.ibex.plat.Java2 org.ibex.plat.JVM $(plat_classes_AWT)
+plat_classes_GCJ := org.ibex.plat.GCJ $(plat_classes_Platform)
+plat_classes_Win32 := org.ibex.plat.Win32 $(plat_classes_GCJ)
+plat_classes_POSIX := org.ibex.plat.POSIX $(plat_classes_GCJ)
+plat_classes_X11 := org.ibex.plat.X11 $(plat_classes_POSIX)
+plat_classes_Linux := org.ibex.plat.Linux $(plat_classes_X11)
+plat_classes_Solaris := org.ibex.plat.Solaris $(plat_classes_X11)
+plat_classes_Darwin := org.ibex.plat.Darwin org.ibex.plat.OpenGL $(plat_classes_POSIX)
+
+plat_java_src_sources := $(patsubst %,build/java/%.java,$(subst .,/,$(plat_classes_$(platform))))
+java_src_sources := $(shell find src -name '*.java' | grep -v Preprocessor | grep -v /plat/)
+java_src_sources += $(plat_java_src_sources)
+java_sources := $(patsubst src/%.java, build/java/%.java, $(java_src_sources))
+
+# FIXME ugly
+java_sources += build/java/org/xwt/mips/util/SeekableByteArray.java
+java_sources += build/java/org/xwt/mips/util/SeekableData.java
+java_sources += build/java/org/xwt/mips/util/SeekableFile.java
+java_sources += build/java/org/xwt/mips/util/SeekableInputStream.java
+java_sources += build/java/org/xwt/mips/Registers.java
+java_sources += build/java/org/xwt/mips/Runtime.java
+java_sources += build/java/org/xwt/mips/UsermodeConstants.java
+
+java_sources += build/java/org/ibex/crypto/DER.java
+java_sources += build/java/org/ibex/crypto/Digest.java
+java_sources += build/java/org/ibex/crypto/HMAC.java
+java_sources += build/java/org/ibex/crypto/MD2.java
+java_sources += build/java/org/ibex/crypto/MD5.java
+java_sources += build/java/org/ibex/crypto/PKCS1.java
+java_sources += build/java/org/ibex/crypto/RC4.java
+java_sources += build/java/org/ibex/crypto/RSA.java
+java_sources += build/java/org/ibex/crypto/SHA1.java
+java_sources += build/java/org/ibex/crypto/X509.java
+java_sources += build/java/org/ibex/crypto/Base64.java
+java_sources += build/java/org/ibex/net/ssl/RootCerts.java
+java_sources += build/java/org/ibex/net/SSL.java
+
+java_sources += build/java/gnu/regexp/CharIndexed.java
+java_sources += build/java/gnu/regexp/CharIndexedCharArray.java
+java_sources += build/java/gnu/regexp/CharIndexedInputStream.java
+java_sources += build/java/gnu/regexp/CharIndexedString.java
+java_sources += build/java/gnu/regexp/CharIndexedStringBuffer.java
+java_sources += build/java/gnu/regexp/RE.java
+java_sources += build/java/gnu/regexp/REException.java
+java_sources += build/java/gnu/regexp/REFilterInputStream.java
+java_sources += build/java/gnu/regexp/REMatch.java
+java_sources += build/java/gnu/regexp/REMatchEnumeration.java
+java_sources += build/java/gnu/regexp/RESyntax.java
+java_sources += build/java/gnu/regexp/REToken.java
+java_sources += build/java/gnu/regexp/RETokenAny.java
+java_sources += build/java/gnu/regexp/RETokenBackRef.java
+java_sources += build/java/gnu/regexp/RETokenChar.java
+java_sources += build/java/gnu/regexp/RETokenEnd.java
+java_sources += build/java/gnu/regexp/RETokenEndSub.java
+java_sources += build/java/gnu/regexp/RETokenLookAhead.java
+java_sources += build/java/gnu/regexp/RETokenWordBoundary.java
+java_sources += build/java/gnu/regexp/RETokenOneOf.java
+java_sources += build/java/gnu/regexp/RETokenPOSIX.java
+java_sources += build/java/gnu/regexp/RETokenRange.java
+java_sources += build/java/gnu/regexp/RETokenRepeated.java
+java_sources += build/java/gnu/regexp/RETokenStart.java
+java_sources += build/java/gnu/regexp/UncheckedRE.java
+java_sources += build/java/gnu/regexp/CharIndexedReader.java
+java_sources += build/java/gnu/regexp/REFilterReader.java
+
+java_classes := $(java_sources:build/java/%.java=build/class/%.class)
+java_classes += build/class/gnu/regexp/CharUnit.class build/class/gnu/regexp/IntPair.class
+
+.PRECIOUS: $(java_classes) $(java_sources) *.java
+
+### Java Source Files ##############################################################################
+
+build/cc/%.cc: src/%.c ; @echo linking $@; mkdir -p $(@D); ln -fs `echo $(@D)/ | sed 's_[^/]*//*_../_g'`/$< $@
+build/res/%: src/% ; @echo linking $@; mkdir -p $(@D); ln -fs `echo $(@D)/ | sed 's_[^/]*//*_../_g'`/$< $@