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 kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild
  10 -include $(kbuild-file)
  11
  12 include scripts/Kbuild.include
  13
  14 # Create output directory if not already present
  15 _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
  16
  17 # Stale wrappers when the corresponding files are removed from generic-y
  18 # need removing.
  19 generated-y   := $(generic-y) $(generated-y)
  20 all-files     := $(patsubst %, $(obj)/%, $(generated-y))
  21 old-headers   := $(wildcard $(obj)/*.h)
  22 unwanted      := $(filter-out $(all-files),$(old-headers))
  23
  24 quiet_cmd_wrap = WRAP    $@
  25 cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@
  26
  27 quiet_cmd_remove = REMOVE  $(unwanted)
  28 cmd_remove = rm -f $(unwanted)
  29
  30 all: $(patsubst %, $(obj)/%, $(generic-y)) FORCE
  31         $(if $(unwanted),$(call cmd,remove),)
  32         @:
  33
  34 $(obj)/%.h:
  35         $(call cmd,wrap)
  36
  37 PHONY += FORCE
  38 .PHONY: $(PHONY)
  39 FORCE: ;