Answering Geir's question #3: compiler, linker and define arguments are specified via <compilerarg>, <linkerarg>, <defineset> tags respectively in .xml subcomponents descriptors depending on OS, compiler, configuration. You can find DRL VM subcomponent descriptors at enhanced/drlvm/trunk/build/make/components/vm/*.xml
Here're some example extracts from jitrino.xml: <!-- linux specific --> <select os="lnx"> <defineset define="PLATFORM_POSIX" /> <select cxx="gcc" arch="ia32,em64t"> <compilerarg value="-msse2" /> </select> <select cxx="gcc"> <compilerarg value="-fmessage-length=0" /> <compilerarg value="-Wall" /> <compilerarg value="-Werror" /> </select> <compilerarg value="-x" /> <compilerarg value="c++" /> <compilerarg value="-fPIC" /> <select cxx="icc"> <compilerarg value="-wd68" /> <compilerarg value="-wd654" /> <compilerarg value="-wd854" /> <compilerarg value="-wd470" /> <compilerarg value="-wd1572" /> <compilerarg value="-wd1125" /> <!-- # 470 - 'qualified name is not allowed in member declaration' # warning #1125: function "xxx" is hidden by "yyy" - virtual function override intended # warning #1572: floating-point equality and inequality comparisons are unreliable --> </select> <select cfg="debug"> <compilerarg value="-g" /> <compilerarg value="-O0" /> </select> <select cfg="release"> <compilerarg value="-O" /> </select> </select> <linker name="${build.cxx}" id="linker"> <select os="win"> <select arch="ipf"> <linkerarg value="/MACHINE:IA64" /> </select> <select arch="em64t"> <linkerarg value="/MACHINE:AMD64" /> </select> <select arch="ia32"> <linkerarg value="/MACHINE:X86" /> </select> <linkerarg value="/DLL" /> <linkerarg value="/SUBSYSTEM:WINDOWS" /> <linkerarg value="/DEBUG" /> <linkerarg value="/NOLOGO" /> <linkerarg value="/FIXED:NO" /> <linkerarg value="/OPT:REF" /> <linkerarg value="/OUT:${libdir}/" /> <libset libs="${vm.vmcore.lib}" dir="${vm.vmcore.libdir}" /> <libset libs="${vm.encoder.lib}" dir="${vm.encoder.libdir}" /> </select> <select os="lnx"> <linkerarg value="-shared" /> <linkerarg value="-ldl" /> <linkerarg value="-lm" /> </select> </linker> -- Denis Sharypov, Intel Middleware Products Division