Initial commit

target/linux/uml/image/Makefile

@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2006-2010 OpenWrt.org
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+
+define Image/Prepare
+	cp $(LINUX_DIR)/linux $(KDIR)/vmlinux.elf
+endef
+
+define Image/Build/squashfs
+	dd if=/dev/zero of=$(KDIR)/root.squashfs bs=1024k count=0 seek=$(CONFIG_TARGET_ROOTFS_PARTSIZE)
+endef
+
+define Image/Build
+	$(call Image/Build/$(1))
+	cp $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-$(1).img
+	cp $(KDIR)/vmlinux.elf $(BIN_DIR)/$(IMG_PREFIX)-vmlinux
+endef
+
+$(eval $(call BuildImage))
+
+# UML requires linking against several glibc static libraries: libutil, librt
+# and libpthread, check that here. We do not check against libpthread
+# specifically because getting something to build that references a libpthread
+# symbol is pretty involved and Linux distributions package these 3 libraries
+# in the same package.
+
+$(eval $(call TestHostCommand,glibc-static, \
+	Please install a static glibc package. (Missing libutil.a, librt.a or libpthread.a), \
+	echo 'int main(int argc, char **argv) { login(0); timer_gettime(0, 0); return 0; }' | \
+		gcc -include utmp.h -include time.h -x c -o $(TMP_DIR)/a.out - -static -lutil -lrt))