scripts/Makefile.asm-generic

   1 # SPDX-License-Identifier: GPL-2.0
   2 # include/asm-generic contains a lot of files that are used
   3 # verbatim by several architectures.
   4 #
   5 # This Makefile reads the file arch/$(SRCARCH)/include/$(src)/Kbuild
   6 # and for each file listed in this file with generic-y creates
   7 # a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/$(src))
   8
   9 PHONY := all
  10 all:
  11
  12 kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild
  13 -include $(kbuild-file)
  14
  15 include scripts/Kbuild.include
  16
  17 # Create output directory if not already present
  18 _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
  19
  20 # Stale wrappers when the corresponding files are removed from generic-y
  21 # need removing.
  22 generated-y   := $(generic-y) $(generated-y)
  23 all-files     := $(patsubst %, $(obj)/%, $(generated-y))
  24 old-headers   := $(wildcard $(obj)/*.h)
  25 unwanted      := $(filter-out $(all-files),$(old-headers))
  26
  27 quiet_cmd_wrap = WRAP    $@
  28 cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@
  29
  30 quiet_cmd_remove = REMOVE  $(unwanted)
  31 cmd_remove = rm -f $(unwanted)
  32
  33 all: $(patsubst %, $(obj)/%, $(generic-y)) FORCE
  34         $(if $(unwanted),$(call cmd,remove),)
  35         @:
  36
  37 $(obj)/%.h:
  38         $(call cmd,wrap)
  39
  40 PHONY += FORCE
  41 .PHONY: $(PHONY)
  42 FORCE: ;