Hi If you move(d) on x86_64 and want to continue work with your old eCos projects you would try to use Docker for that. Perhaps someone finds this way useful. A short story by the subject. Yesterday I needed to build 6-years old RedBoot image on 64-bit Linux host and I successfully built it using <32-bit> docker container. There is an example of `Dockerfile' for building one old eCos project for ARM target below. As you can see for image you need to install only GNU Make and Tcl interpreter (it uses to run heapgen.tcl script) CURL is an option as you can use Docker [COPY] command to build own image(s). Sergei ----------------------------------------------------------------->8 FROM i386/ubuntu RUN apt-get update && apt-get install -y --no-install-recommends \ curl \ make \ tcl \ && rm -rf /var/lib/apt/lists/* ### If you want to build "tip", change the next line accordingly! ENV ECOS_INSTALL_VERSION ae816c83f082 # To reduce download times, please choose the site nearest to you # http://ecos.sourceware.org/mirror.html RUN install -d /opt/ecos/tools/bin && curl -sL http://mirrors.kernel.org/sources.redhat.com/ecos/anoncvs/ecos-tools-bin-110209.i386linux.tar.bz2 | tar -xjf - -C /opt/ecos/tools/bin ecosconfig RUN curl -sL http://mirrors.kernel.org/sources.redhat.com/ecos/gnutools/i386linux/ecos-gnutools-arm-eabi-20120623.i386linux.tar.bz2 | tar -xjf - -C /opt/ecos RUN curl -sL http://hg-pub.ecoscentric.com/ecos/archive/${ECOS_INSTALL_VERSION}.tar.bz2 | tar -xjf - -C /opt/ecos ENV ECOS_REPOSITORY /opt/ecos/ecos-${ECOS_INSTALL_VERSION}/packages ENV PATH /opt/ecos/gnutools/arm-eabi/bin:/opt/ecos/tools/bin:${PATH} ----------------------------------------------------------------->8