Add buildroot for building test kernel/initramfs

ALSchwalm · ALSchwalm · commit 22b7543ca3b4 · 2020-12-05T15:21:20.000-06:00
diff --git a/.dockerignore b/.dockerignore
@@ -0,0 +1,2 @@
+output/
+buildroot/
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+output/
diff --git a/.gitmodules b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "buildroot"]
+	path = buildroot
+	url = https://github.com/buildroot/buildroot.git
diff --git a/Makefile b/Makefile
@@ -0,0 +1,30 @@
+.DEFAULT_GOAL := test-images
+
+OUTPUT_ROOT=output/
+TEST_GUEST_KERNEL_TARGET=$(OUTPUT_ROOT)/test-bzImage
+TEST_GUEST_KERNEL_INITRAMFS=$(OUTPUT_ROOT)/test-initramfs.img
+
+.PHONY: test-images
+test-images: $(TEST_GUEST_KERNEL_TARGET) $(TEST_GUEST_KERNEL_INITRAMFS)
+
+$(OUTPUT_ROOT):
+	mkdir -p $(OUTPUT_ROOT)
+
+$(TEST_GUEST_KERNEL_TARGET): buildroot.config kernel.config $(OUTPUT_ROOT)
+	cp buildroot.config buildroot/.config
+	make -C buildroot linux
+	cp buildroot/output/images/bzImage $(TEST_GUEST_KERNEL_TARGET)
+
+$(TEST_GUEST_KERNEL_INITRAMFS): $(TEST_GUEST_KERNEL_TARGET)
+	cp buildroot.config buildroot/.config
+	make -C buildroot
+	cp buildroot/output/images/rootfs.cpio.gz $(TEST_GUEST_KERNEL_INITRAMFS)
+
+.PHONY: docker
+docker:
+	docker build .
+
+.PHONY: clean
+clean:
+	rm -rf $(OUTPUT_ROOT)
+	make -C buildroot clean
diff --git a/buildroot b/buildroot
@@ -0,0 +1 @@
+Subproject commit 6eff339082d2c9a7dca7f436ea898189f5510ef2
diff --git a/buildroot.config b/buildroot.config
diff --git a/kernel.config b/kernel.config

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+[submodule "buildroot"]`
	`2`	`+ path = buildroot`
	`3`	`+ url = https://github.com/buildroot/buildroot.git`