feat(userspace/libc): support for linux target

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/docker/.gitignore

@@ -0,0 +1,2 @@
+cache/*
+docker-root/*

Userspace/docker/Dockerfile

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+FROM scratch
+ADD docker-root /
+CMD ["/bin/sh"]

Userspace/docker/Makefile

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+export DOCKER_ROOT = $(CURDIR)/docker-root
+DOCKER_IMAGE_NAME = fennix-userspace
+
+export CMAKE_INSTALL_PREFIX := $(DOCKER_ROOT)
+export CMAKE_SYSROOT := $(DOCKER_ROOT)
+
+export LDFLAGS := --sysroot=$(DOCKER_ROOT) \
+	-ggdb3 -O0
+export CFLAGS := \
+	--sysroot=$(DOCKER_ROOT) \
+	-I$(DOCKER_ROOT)/include \
+	-DDEBUG -ggdb3 -O0 -fdiagnostics-color=always
+
+create_docker_out:
+	rm -rf cache
+	rm -rf $(DOCKER_ROOT)
+	mkdir -p $(DOCKER_ROOT)
+	mkdir -p $(DOCKER_ROOT)/bin
+	mkdir -p $(DOCKER_ROOT)/etc
+	mkdir -p $(DOCKER_ROOT)/lib
+	mkdir -p $(DOCKER_ROOT)/lib64
+	mkdir -p $(DOCKER_ROOT)/include/linux
+	mkdir -p $(DOCKER_ROOT)/usr/bin
+	mkdir -p $(DOCKER_ROOT)/usr/share/doc
+	mkdir -p $(DOCKER_ROOT)/usr/share/info
+	mkdir -p $(DOCKER_ROOT)/usr/include
+	mkdir -p $(DOCKER_ROOT)/usr/lib
+
+build_docker_coreutils:
+	mkdir -p cache/coreutils
+	cd cache/coreutils && \
+	cmake $(CURDIR)/../coreutils \
+	-DCMAKE_INSTALL_PREFIX:PATH=$(DOCKER_ROOT) \
+	-DCMAKE_SYSROOT=$(DOCKER_ROOT) \
+	-DCMAKE_C_STANDARD_INCLUDE_DIRECTORIES=$(DOCKER_ROOT)/include \
+	-DCMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES=$(DOCKER_ROOT)/include \
+	&& \
+	make -j$(shell nproc) && \
+	make install
+
+build_docker_libc:
+	mkdir -p cache/libc
+	cd cache/libc && \
+	cmake $(CURDIR)/../libc \
+	-DCMAKE_INSTALL_PREFIX=$(DOCKER_ROOT) \
+	-DCMAKE_SYSROOT=$(DOCKER_ROOT) \
+	-DCMAKE_INSTALL_INCLUDEDIR=include \
+	-DCMAKE_INSTALL_LIBDIR=lib \
+	-DCMAKE_INSTALL_BINDIR=bin && \
+	make -j$(shell nproc) && \
+	make install
+
+docker_image:
+	docker build -t $(DOCKER_IMAGE_NAME) -f Dockerfile .
+
+docker_run:
+	@echo "Running container..."
+	@docker run -it --name fennix-userspace-instance fennix-userspace:latest /bin/sh || true
+	@echo "\nExit code: $$(docker inspect fennix-userspace-instance --format='{{.State.ExitCode}}')"
+	@docker rm fennix-userspace-instance >/dev/null 2>&1
+
+docker: create_docker_out
+	$(MAKE) build_docker_libc
+	$(MAKE) build_docker_coreutils
+
+clean:
+	rm -rf cache
+	rm -rf $(DOCKER_ROOT)