target/linux/uml/image/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2010 OpenWrt.org
   4
   5 include $(TOPDIR)/rules.mk
   6 include $(INCLUDE_DIR)/image.mk
   7
   8 define Image/Prepare
   9         cp $(LINUX_DIR)/linux $(KDIR)/vmlinux.elf
  10 endef
  11
  12 define Image/Build/squashfs
  13         dd if=/dev/zero of=$(KDIR)/root.squashfs bs=1024k count=0 seek=$(CONFIG_TARGET_ROOTFS_PARTSIZE)
  14 endef
  15
  16 define Image/Build
  17         $(call Image/Build/$(1))
  18         cp $(KDIR)/root.$(1) $(BIN_DIR)/$(IMG_PREFIX)-$(1).img
  19         cp $(KDIR)/vmlinux.elf $(BIN_DIR)/$(IMG_PREFIX)-vmlinux
  20 endef
  21
  22 $(eval $(call BuildImage))
  23
  24 # UML requires linking against several glibc static libraries: libutil, librt
  25 # and libpthread, check that here. We do not check against libpthread
  26 # specifically because getting something to build that references a libpthread
  27 # symbol is pretty involved and Linux distributions package these 3 libraries
  28 # in the same package.
  29
  30 $(eval $(call TestHostCommand,glibc-static, \
  31         Please install a static glibc package. (Missing libutil.a, librt.a or libpthread.a), \
  32         echo 'int main(int argc, char **argv) { login(0); timer_gettime(0, 0); return 0; }' | \
  33                 gcc -include utmp.h -x c -o $(TMP_DIR)/a.out - -static -lutil -lrt))