Add x86_64 kernel bring-up with build-selected platform adapters

Dockerfile

@@ -6,7 +6,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN dpkg --add-architecture i386
 RUN apt-get update && apt-get install -y \
 	curl dos2unix wget git make nasm binutils xorriso grub-pc-bin gcc gcc-multilib \
-	python3 python3-pip python3-pil && \
+	python3 python3-pip python3-pil fp-compiler && \
 	apt-get clean my room
 
 RUN pip3 install --no-cache-dir --break-system-packages "mkdocs>=1.6,<2" mkdocs-material
@@ -20,6 +20,6 @@ RUN curl -sL https://sourceforge.net/projects/freepascal/files/Linux/$FPC_VERSIO
 ADD https://raw.githubusercontent.com/fsaintjacques/semver-tool/master/src/semver /usr/bin/semver
 RUN chmod +x /usr/bin/semver
 WORKDIR /code
-RUN find . -type f -print0 | xargs -0 dos2unix
+# Sources are mounted at runtime; the CMD below normalizes build scripts.
 ENTRYPOINT ["/bin/bash", "-c"]
-CMD ["find toolchain -name '*.sh' -exec dos2unix {} + 2>/dev/null; find toolchain -name '*.sh' -exec chmod +x {} +; bash toolchain/compile.sh"]
+CMD ["find toolchain -name '*.sh' -exec dos2unix {} + 2>/dev/null; find toolchain -name '*.sh' -exec chmod +x {} +; bash toolchain/compile.sh"]