1 files changed, 103 insertions, 0 deletions
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
new file mode 100644
index 00000000..f89cb87f
--- /dev/null
+++ b/scripts/Makefile.headersinst
@@ -0,0 +1,103 @@
+# ==========================================================================
+# Installing headers
+#
+# header-y  - list files to be installed. They are preprocessed
+#             to remove __KERNEL__ section of the file
+# objhdr-y  - Same as header-y but for generated files
+#
+# ==========================================================================
+
+# called may set destination dir (when installing to asm/)
+_dst := $(if $(dst),$(dst),$(obj))
+
+kbuild-file := $(srctree)/$(obj)/Kbuild
+include $(kbuild-file)
+
+_dst := $(if $(destination-y),$(destination-y),$(_dst))
+
+include scripts/Kbuild.include
+
+install       := $(INSTALL_HDR_PATH)/$(_dst)
+
+header-y      := $(sort $(header-y))
+subdirs       := $(patsubst %/,%,$(filter %/, $(header-y)))
+header-y      := $(filter-out %/, $(header-y))
+
+# files used to track state of install/check
+install-file  := $(install)/.install
+check-file    := $(install)/.check
+
+# all headers files for this dir
+all-files     := $(header-y) $(objhdr-y)
+input-files   := $(addprefix $(srctree)/$(obj)/,$(header-y)) \
+                 $(addprefix $(objtree)/$(obj)/,$(objhdr-y))
+output-files  := $(addprefix $(install)/, $(all-files))
+
+# Work out what needs to be removed
+oldheaders    := $(patsubst $(install)/%,%,$(wildcard $(install)/*.h))
+unwanted      := $(filter-out $(all-files),$(oldheaders))
+
+# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
+unwanted-file := $(addprefix $(install)/, $(unwanted))
+
+printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
+
+quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
+                            file$(if $(word 2, $(all-files)),s))
+      cmd_install = \
+        $(PERL) $< $(srctree)/$(obj) $(install) $(SRCARCH) $(header-y); \
+        $(PERL) $< $(objtree)/$(obj) $(install) $(SRCARCH) $(objhdr-y); \
+        touch $@
+
+quiet_cmd_remove = REMOVE  $(unwanted)
+      cmd_remove = rm -f $(unwanted-file)
+
+quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
+# Headers list can be pretty long, xargs helps to avoid
+# the "Argument list too long" error.
+      cmd_check = for f in $(all-files); do                          \
+                  echo "$(install)/$${f}"; done                      \
+                  | xargs                                            \
+                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
+	          touch $@
+
+PHONY += __headersinst __headerscheck
+
+ifndef HDRCHECK
+# Rules for installing headers
+__headersinst: $(subdirs) $(install-file)
+	@:
+
+targets += $(install-file)
+$(install-file): scripts/headers_install.pl $(input-files) FORCE
+	$(if $(unwanted),$(call cmd,remove),)
+	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
+	$(call if_changed,install)
+
+else
+__headerscheck: $(subdirs) $(check-file)
+	@:
+
+targets += $(check-file)
+$(check-file): scripts/headers_check.pl $(output-files) FORCE
+	$(call if_changed,check)
+
+endif
+
+# Recursion
+hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
+.PHONY: $(subdirs)
+$(subdirs):
+	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
+
+targets := $(wildcard $(sort $(targets)))
+cmd_files := $(wildcard \
+             $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
+
+ifneq ($(cmd_files),)
+	include $(cmd_files)
+endif
+
+.PHONY: $(PHONY)
+PHONY += FORCE
+FORCE: ;