Use dependencies for 'make headers_install'.
Re-export header files only if either they or their controlling Kbuild
file has actually changed. Also allow for similar dependencies with
'headers_check', once we properly create the dependencies for those.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 12e1daf..07004c4 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -23,30 +23,30 @@
_dst := $(if $(dst),$(dst),$(obj))
-.PHONY: __headersinst
-__headersinst:
-
-
ifeq (,$(patsubst include/asm/%,,$(obj)/))
# For producing the generated stuff in include/asm for biarch builds, include
# both sets of Kbuild files; we'll generate anything which is mentioned in
# _either_ arch, and recurse into subdirectories which are mentioned in either
# arch. Since some directories may exist in one but not the other, we must
-# use '-include'.
+# use $(wildcard...).
GENASM := 1
archasm := $(subst include/asm,asm-$(ARCH),$(obj))
altarchasm := $(subst include/asm,asm-$(ALTARCH),$(obj))
--include $(srctree)/include/$(archasm)/Kbuild
--include $(srctree)/include/$(altarchasm)/Kbuild
+KBUILDFILES := $(wildcard $(srctree)/include/$(archasm)/Kbuild $(srctree)/include/$(altarchasm)/Kbuild)
else
-include $(srctree)/$(obj)/Kbuild
+KBUILDFILES := $(srctree)/$(obj)/Kbuild
endif
-include scripts/Kbuild.include
+include $(KBUILDFILES)
+
+include scripts/Kbuild.include
# If this is include/asm-$(ARCH) and there's no $(ALTARCH), then
# override $(_dst) so that we install to include/asm directly.
-ifeq ($(obj)$(ALTARCH),include/asm-$(ARCH))
+# Unless $(BIASMDIR) is set, in which case we're probably doing
+# a 'headers_install_all' build and we should keep the -$(ARCH)
+# in the directory name.
+ifeq ($(obj)$(ALTARCH),include/asm-$(ARCH)$(BIASMDIR))
_dst := include/asm
endif
@@ -56,6 +56,23 @@
header-y := $(filter-out %/, $(header-y))
header-y := $(filter-out $(unifdef-y),$(header-y))
+# stamp files for header checks
+check-y := $(patsubst %,.check.%,$(header-y) $(unifdef-y) $(objhdr-y))
+
+# Work out what needs to be removed
+oldheaders := $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$(wildcard $(INSTALL_HDR_PATH)/$(_dst)/*.h))
+unwanted := $(filter-out $(header-y) $(unifdef-y) $(objhdr-y),$(oldheaders))
+
+oldcheckstamps := $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$(wildcard $(INSTALL_HDR_PATH)/$(_dst)/.check.*.h))
+unwanted += $(filter-out $(check-y),$(oldcheckstamps))
+
+# Prefix them all with full paths to $(INSTALL_HDR_PATH)
+header-y := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(header-y))
+unifdef-y := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(unifdef-y))
+objhdr-y := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(objhdr-y))
+check-y := $(patsubst %,$(INSTALL_HDR_PATH)/$(_dst)/%,$(check-y))
+
+
ifdef ALTARCH
ifeq ($(obj),include/asm-$(ARCH))
altarch-y := altarch-dir
@@ -67,43 +84,47 @@
export ARCHDEF
export ALTARCHDEF
-quiet_cmd_o_hdr_install = INSTALL $(_dst)/$@
- cmd_o_hdr_install = cp $(objtree)/$(obj)/$@ $(INSTALL_HDR_PATH)/$(_dst)
+quiet_cmd_o_hdr_install = INSTALL $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
+ cmd_o_hdr_install = cp $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,$(objtree)/$(obj)/%,$@) \
+ $(INSTALL_HDR_PATH)/$(_dst)
-quiet_cmd_headers_install = INSTALL $(_dst)/$@
- cmd_headers_install = $(HDRSED) $(srctree)/$(obj)/$@ \
- > $(INSTALL_HDR_PATH)/$(_dst)/$@
+quiet_cmd_headers_install = INSTALL $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
+ cmd_headers_install = $(HDRSED) $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,$(srctree)/$(obj)/%,$@) \
+ > $@
-quiet_cmd_unifdef = UNIFDEF $(_dst)/$@
- cmd_unifdef = $(UNIFDEF) $(srctree)/$(obj)/$@ | $(HDRSED) \
- > $(INSTALL_HDR_PATH)/$(_dst)/$@ || :
+quiet_cmd_unifdef = UNIFDEF $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
+ cmd_unifdef = $(UNIFDEF) $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,$(srctree)/$(obj)/%,$@) \
+ | $(HDRSED) > $@ || :
-quiet_cmd_check = CHECK $(_dst)/$@
+quiet_cmd_check = CHECK $(patsubst $(INSTALL_HDR_PATH)/$(_dst)/.check.%,$(_dst)/%,$@)
cmd_check = $(srctree)/scripts/hdrcheck.sh \
- $(INSTALL_HDR_PATH)/include \
- $(INSTALL_HDR_PATH)/$(_dst)/$@
+ $(INSTALL_HDR_PATH)/include $(subst /.check.,/,$@) $@
-quiet_cmd_mkdir = MKDIR $@
- cmd_mkdir = mkdir -p $(INSTALL_HDR_PATH)/$@
+quiet_cmd_remove = REMOVE $(_dst)/$@
+ cmd_remove = rm -f $(INSTALL_HDR_PATH)/$(_dst)/$@
-quiet_cmd_gen = GEN $(_dst)/$@
+quiet_cmd_mkdir = MKDIR $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
+ cmd_mkdir = mkdir -p $@
+
+quiet_cmd_gen = GEN $(patsubst $(INSTALL_HDR_PATH)/%,%,$@)
cmd_gen = \
-STUBDEF=__ASM_STUB_`echo $@ | tr a-z. A-Z_`; \
+FNAME=$(patsubst $(INSTALL_HDR_PATH)/$(_dst)/%,%,$@) \
+STUBDEF=__ASM_STUB_`echo $$FNAME | tr a-z. A-Z_`; \
(echo "/* File autogenerated by 'make headers_install' */" ; \
echo "\#ifndef $$STUBDEF" ; \
echo "\#define $$STUBDEF" ; \
echo "\# if $(ARCHDEF)" ; \
-if [ -r $(INSTALL_HDR_PATH)/include/$(archasm)/$@ ]; then \
- echo "\# include <$(archasm)/$@>" ; \
+if [ -r $(subst /$(_dst)/,/include/$(archasm)/,$@) ]; then \
+ echo "\# include <$(archasm)/$$FNAME>" ; \
else \
- echo "\# error $(archasm)/$@ does not exist in" \
+ echo "\# error $(archasm)/$$FNAME does not exist in" \
"the $(ARCH) architecture" ; \
fi ; \
echo "\# elif $(ALTARCHDEF)" ; \
-if [ -r $(INSTALL_HDR_PATH)/include/$(altarchasm)/$@ ]; then \
- echo "\# include <$(altarchasm)/$@>" ; \
+if [ -r $(subst /$(_dst)/,/include/$(altarchasm)/,$@) ]; then \
+ echo "\# include <$(altarchasm)/$$FNAME>" ; \
else \
- echo "\# error $(altarchasm)/$@ does not exist in" \
+ echo "\# error $(altarchasm)/$$FNAME does not exist in" \
"the $(ALTARCH) architecture" ; \
fi ; \
echo "\# else" ; \
@@ -111,37 +132,49 @@
"neither $(ARCH) nor $(ALTARCH)." ; \
echo "\# endif" ; \
echo "\#endif /* $$STUBDEF */" ; \
-) > $(INSTALL_HDR_PATH)/$(_dst)/$@
+) > $@
-__headersinst: $(subdir-y) $(header-y) $(unifdef-y) $(altarch-y) $(objhdr-y)
-
-.PHONY: $(header-y) $(unifdef-y) $(subdir-y)
+.PHONY: __headersinst __headerscheck
ifdef HDRCHECK
-# Rules for checking headers
-$(objhdr-y) $(header-y) $(unifdef-y):
+__headerscheck: $(subdir-y) $(check-y)
+ @true
+
+$(check-y) : $(INSTALL_HDR_PATH)/$(_dst)/.check.%.h : $(INSTALL_HDR_PATH)/$(_dst)/%.h
$(call cmd,check)
+
+# Other dependencies for $(check-y)
+-include /dev/null $(check-y)
+
+# ... but leave $(check-y) as .PHONY for now until those deps are actually correct.
+.PHONY: $(check-y)
+
else
# Rules for installing headers
+__headersinst: $(subdir-y) $(header-y) $(unifdef-y) $(altarch-y) $(objhdr-y)
+ @true
-$(objhdr-y) $(subdir-y) $(header-y) $(unifdef-y): $(_dst)
+$(objhdr-y) $(subdir-y) $(header-y) $(unifdef-y): | $(INSTALL_HDR_PATH)/$(_dst) $(unwanted)
-.PHONY: $(_dst)
-$(_dst):
+$(INSTALL_HDR_PATH)/$(_dst):
$(call cmd,mkdir)
+.PHONY: $(unwanted)
+$(unwanted):
+ $(call cmd,remove)
+
ifdef GENASM
-$(objhdr-y) $(header-y) $(unifdef-y):
+$(objhdr-y) $(header-y) $(unifdef-y): $(KBUILDFILES)
$(call cmd,gen)
else
-$(objhdr-y):
+$(objhdr-y) : $(INSTALL_HDR_PATH)/$(_dst)/%.h: $(srctree)/$(obj)/%.h $(KBUILDFILES)
$(call cmd,o_hdr_install)
-$(header-y):
+$(header-y) : $(INSTALL_HDR_PATH)/$(_dst)/%.h: $(srctree)/$(obj)/%.h $(KBUILDFILES)
$(call cmd,headers_install)
-$(unifdef-y):
+$(unifdef-y) : $(INSTALL_HDR_PATH)/$(_dst)/%.h: $(srctree)/$(obj)/%.h $(KBUILDFILES)
$(call cmd,unifdef)
endif
endif
@@ -153,8 +186,9 @@
# for their existence.
altarch-dir: $(subdir-y) $(header-y) $(unifdef-y) $(objhdr-y)
$(Q)$(MAKE) $(hdrinst)=include/asm-$(ALTARCH) dst=include/asm-$(ALTARCH)
- $(Q)$(MAKE) $(hdrinst)=include/asm dst=include/asm
+ $(Q)$(MAKE) $(hdrinst)=include/asm dst=include/asm$(BIASMDIR)
# Recursion
+.PHONY: $(subdir-y)
$(subdir-y):
$(Q)$(MAKE) $(hdrinst)=$(obj)/$@ dst=$(_dst)/$@ rel=../$(rel)