Since commit 61562f981e92 ("uapi: export all arch specifics
directories"), "make INSTALL_HDR_PATH=${root}/usr headers_install"
deletes standard glibc headers and others in ${root}/usr/include.
The cause of the issue is that headers_install now starts descending
from arch/$(hdr-arch)/include/uapi with ${root}/usr/include for its
destination when installing asm headers. So, headers already there
are assumed to be unwanted.
When headers_install starts descending from include/uapi with
${root}/usr/include for its destination, it works around the problem
by creating an dummy destination ${root}/usr/include/uapi, but this
is tricky.
To fix the problem in a clean way is to skip header install/check in
include/uapi or arch/$(hdr-arch)/include/uapi. A good side-effect
is the empty destination ${root}/usr/include/uapi will go away.
Fixes: 61562f981e92 ("uapi: export all arch specifics directories")
Reported-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---
scripts/Makefile.headersinst | 43 +++++++++++++++++++++++++++----------------
1 file changed, 27 insertions(+), 16 deletions(-)
diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst
index 6ba97a1..ce753a4 100644
--- a/scripts/Makefile.headersinst
+++ b/scripts/Makefile.headersinst
@@ -8,6 +8,29 @@
#
# ==========================================================================
+PHONY := __headers
+__headers:
+
+include scripts/Kbuild.include
+
+srcdir := $(srctree)/$(obj)
+subdirs := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.))
+# caller may set destination dir (when installing to asm/)
+_dst := $(if $(dst),$(dst),$(obj))
+
+# Recursion
+__headers: $(subdirs)
+
+.PHONY: $(subdirs)
+$(subdirs):
+ $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
+
+# Skip header install/check for include/uapi and arch/$(hdr-arch)/include/uapi.
+# We have only sub-directories there.
+skip-inst := $(if $(filter %/uapi,$(obj)),1)
+
+ifeq ($(skip-inst),)
+
# generated header directory
gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
@@ -15,21 +38,14 @@ gen := $(if $(gen),$(gen),$(subst include/,include/generated/,$(obj)))
kbuild-file := $(srctree)/$(obj)/Kbuild
-include $(kbuild-file)
-# called may set destination dir (when installing to asm/)
-_dst := $(if $(dst),$(dst),$(obj))
-
old-kbuild-file := $(srctree)/$(subst uapi/,,$(obj))/Kbuild
ifneq ($(wildcard $(old-kbuild-file)),)
include $(old-kbuild-file)
endif
-include scripts/Kbuild.include
-
installdir := $(INSTALL_HDR_PATH)/$(subst uapi/,,$(_dst))
-srcdir := $(srctree)/$(obj)
gendir := $(objtree)/$(gen)
-subdirs := $(patsubst $(srcdir)/%/.,%,$(wildcard $(srcdir)/*/.))
header-files := $(notdir $(wildcard $(srcdir)/*.h))
header-files += $(notdir $(wildcard $(srcdir)/*.agh))
header-files := $(filter-out $(no-export-headers), $(header-files))
@@ -88,11 +104,9 @@ quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files)
$(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
touch $@
-PHONY += __headersinst __headerscheck
-
ifndef HDRCHECK
# Rules for installing headers
-__headersinst: $(subdirs) $(install-file)
+__headers: $(install-file)
@:
targets += $(install-file)
@@ -104,7 +118,7 @@ $(install-file): scripts/headers_install.sh \
$(call if_changed,install)
else
-__headerscheck: $(subdirs) $(check-file)
+__headers: $(check-file)
@:
targets += $(check-file)
@@ -113,11 +127,6 @@ $(check-file): scripts/headers_check.pl $(output-files) FORCE
endif
-# Recursion
-.PHONY: $(subdirs)
-$(subdirs):
- $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(_dst)/$@
-
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard \
$(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
@@ -126,6 +135,8 @@ ifneq ($(cmd_files),)
include $(cmd_files)
endif
+endif # skip-inst
+
.PHONY: $(PHONY)
PHONY += FORCE
FORCE: ;
--
2.7.4
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