Hi All, I am using GCJ 4.2.0 to compile my java app into a win32 exe. My app uses external jars like log4j. I use the makefile built by eclipse plugin GCJBuilder. So the external libraries have been compiled into .o object files as well as all my java classes. During the compiling/linking (??) process, I get these "undefined reference" errors from external jars classes like log4J but also from my own java classes. Any help would be greatly appreciated. The compile line is like this: gcj -O2 -g3 -fjni -ID:\Software\Programming\gcc-119844-win\share\awt\gui.jar -IC:/MesDocuments/_dev/CocoonWorkspace/Compilation/lib --main=cafe.main.UpdateLauncher debug/./commons-net-1.4.1.jar.o debug/./ethermac.jar.o debug/./jakarta-oro-2.0.8.jar.o debug/./jdic_misc.jar.o debug/./jdic-native.jar.o debug/./jRegistryKey.jar.o debug/./log4j-1.2.12.jar.o cafe/AdCafeException.o cafe/AdCafeProperties.o cafe/Updater.o cafe/MsWinSvc.o cafe/configuration/Configurator.o cafe/configuration/PCConfig.o cafe/configuration/BasePCConfig.o cafe/main/UpdateInstaller.o cafe/main/TestUpdateInstaller.o cafe/main/ConfiguratorLauncher.o cafe/main/TestReporterLauncher.o cafe/main/ReporterLauncher.o cafe/main/TestUpdaterLauncher.o cafe/main/TestConfiguratorLauncher.o cafe/main/UpdateLauncher.o cafe/main/Test.o cafe/reporter/LogFileReporter.o cafe/reporter/StatisticsReporter.o cafe/reporter/Reporter.o cafe/reporter/ActivityReporter.o cafe/updater/LocalUpdateWrapper.o cafe/updater/SoftwareUpdater.o cafe/updater/CafeConfigUpdater.o cafe/updater/AdsUpdater.o cafe/updater/RemoteAdsUpdater.o cafe/updater/RemoteCafeConfigUpdater.o cafe/updater/UpdateWrapper.o cafe/updater/FtpUpdateWrapper.o cafe/updater/RemoteSoftwareUpdater.o cafe/updater/LocalAdsUpdater.o cafe/updater/LocalSoftwareUpdater.o cafe/updater/LocalCafeConfigUpdater.o cafe/updater/Updater.o cafe/util/RegistryUtil.o cafe/util/FileZipper.o cafe/util/JakartaFtpWrapper.o cafe/util/HTTPUtil.o cafe/util/EncryptedFileHandler.o cafe/util/RegistryNotSetException.o cafe/util/CafeUtil.o cafe/util/NetUtil.o -odebug/Compilation -Ldebug -LC:/MesDocuments/_dev/CocoonWorkspace/Compilation/lib An error from the external jar: C:/MesDocuments/_dev/CocoonWorkspace/Compilation/org/apache/log4j/config/PropertyPrinter.java:113: undefined reference to `_ZN4java3awt9Component18firePropertyChangeEJvPNS_4lang6StringEff' An error from one of my own class: C:/MesDocuments/_dev/CocoonWorkspace/Compilation/cafe/AdCafeProperties.java:272: undefined reference to `cafe::AdCafeException::class$' Cheers, Jerome Jerome Benezech jbenezech@xxxxxxxxx