share/mk/kmod.mk

   1 #
   2 # Build and install a kernel module helper.
   3 #
   4 # See kernel/mk/kmod-build.mk for description of inputs used during the
   5 # build.  This makefile is responsible for making and cleaning up object
   6 # subdirectories.  All other tasks are handled by secondary makefile -
   7 # kmod-build.mk.
   8 #
   9 # The config system tells us:
  10 #
  11 #   (1) whether to build this module at all
  12 #   (2) if we're supposed to build it, should we build 32-bit or 64-bit?
  13 #
  14 # The following config variable addresses #2 above:
  15 #
  16 #   CONFIG_KERNEL_BITS = 64
  17 #
  18 # and the following config var tells us whether to bother with this
  19 # particular module:
  20 #
  21 #   CONFIG_FOOBAR = y
  22 #
  23 # If we are not supposed to care about this module, we do not even recurse
  24 # into the module's build directory.
  25 #
  26 # This way, we separate the concerns of defining a module and how it is
  27 # (generically) built, from which platforms/ISA/whatever we're supposed to
  28 # build the module for.
  29 #
  30 # To avoid recursively including kmod-build.mk, this makefile turns into a
  31 # giant no-op if _KMOD_BUILD is set.
  32 #
  33
  34 .if empty(_KMOD_BUILD)
  35
  36 .include <unleashed.mk>
  37 .include <${SRCTOP}/cfgparam.mk>
  38
  39 all:
  40         @mkdir -p obj${CONFIG_KERNEL_BITS}
  41         @${MAKE} -f ${SRCTOP}/kernel/mk/kmod-build.mk all \
  42                 BITS=${CONFIG_KERNEL_BITS} SRCTOP=${SRCTOP}
  43
  44 clean cleandir:
  45         @${MAKE} -f ${SRCTOP}/kernel/mk/kmod-build.mk clean \
  46                 SRCTOP=${SRCTOP}
  47         @rm -rf obj${CONFIG_KERNEL_BITS}
  48
  49 install:
  50         @${MAKE} -f ${SRCTOP}/kernel/mk/kmod-build.mk install-misc \
  51                 SRCTOP=${SRCTOP}
  52         @${MAKE} -f ${SRCTOP}/kernel/mk/kmod-build.mk install \
  53                 BITS=${CONFIG_KERNEL_BITS} SRCTOP=${SRCTOP}
  54
  55 .PHONY: all clean cleandir install
  56
  57 .endif