I compiled statically an application with dependencies to javax.xml.parser using GCJ, replacing DocumentBuilderFactory.newInstance() with new DomDocumentBuilderFactory() (with -static-gcj switch).
By bad fortune, there is no DomDocumentBuilderFactory entry in the output of command: nm --demangle=java myapp.executable I extracted a portion of libgcj-4.2.0.jar (the whole content of gnu.xml.* package), say gcj-dom.jar, and compiled and linked it with my application. The result executable has DomDocumentBuilderFactory but this time I'm facing with NoClassDefFoundError for gnu.xml.dom.DomImpl. Again I put the trivial code new DomImpl() and linked the app. This time again I'm facing with: java.lang.NoClassDefFoundError: gnu.xml.dom.DomImpl java.lang.Class.initializeClass(zekr_static_olpc.exe) gnu.xml.dom.ImplementationSource.<clinit>(zekr_static_olpc.exe) java.lang.Class.initializeClass(zekr_static_olpc.exe) java.lang.Class.newInstance(zekr_static_olpc.exe) org.w3c.dom.bootstrap.DOMImplementationRegistry.newInstance(zekr_static_olpc.exe) gnu.xml.dom.DomDocumentBuilderFactory.<init>(zekr_static_olpc.exe) net.sf.zekr.engine.xml.XmlReader.<init>(zekr_static_olpc.exe) net.sf.zekr.common.config.ApplicationConfig.extractLangProps(zekr_static_olpc.exe) ... It's strange that although there exists some entry for gnu.xml.dom.DomImpl with: nm --demangle=java myapp.exe it gives me that error. I should also say that I tried to embed xercesImpl.jar with my app, setting: -Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl so that it uses xerces instead of gnu.xml.*. It gives me again a NoClassDefFoundError. It seems that even when a class is embedded in a static binary, class loader (java.lang.Class.initializeClass()) cannot load that. I used this on Ubuntu 6.10 (Edgy); GCC version is 4.1.2 (2006-9-28 prerelease, Ubuntu 4.1.1.14ubuntu7) Here is some posts on GCJ mailing list regarding this problem: - http://www.nabble.com/libgcj_bc.so-not-embedded-t3538410.html - http://www.nabble.com/libgcj_bc.so-not-embedded-t3538410i20.html - http://www.nabble.com/Trying-to-embed-gnu.xml.dom.DomDocumentBuilderFactory-t3608745.html -- Summary: Embedded class dependencies cannot be loaded dynamically from a staic binary Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: java AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mohsens at gmail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31647
