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kbuild: remove headers_{install,check}_all

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headers_install_all does not make much sense any more because different
architectures export different set of uapi/linux/ headers. As you see
in include/uapi/linux/Kbuild, the installation of a.out.h, kvm.h, and
kvm_para.h is arch-dependent. So, headers_install_all repeats the
installation/removal of them.

If somebody really thinks it is useful to do headers_install for all
architectures, it would be possible by small shell-scripting, but
the top Makefile does not have to provide entry targets just for that
purpose.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Masahiro Yamada 2019-06-04 19:13:55 +09:00
parent 869ee58b82
commit f3c8d4c7a7
4 changed files with 3 additions and 54 deletions
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7
Documentation/kbuild/headers_install.txt
View File

@ -39,12 +39,5 @@ INSTALL_HDR_PATH indicates where to install the headers. It defaults to
An 'include' directory is automatically created inside INSTALL_HDR_PATH and
headers are installed in 'INSTALL_HDR_PATH/include'.
The command "make headers_install_all" exports headers for all architectures
simultaneously. (This is mostly of interest to distribution maintainers,
who create an architecture-independent tarball from the resulting include
directory.) You also can use HDR_ARCH_LIST to specify list of architectures.
Remember to provide the appropriate linux/asm directory via "mv" or "ln -s"
before building a C library with headers exported this way.
The kernel header export infrastructure is maintained by David Woodhouse
<dwmw2@infradead.org>.

6
Documentation/kbuild/makefiles.txt
View File

@ -897,11 +897,7 @@ When kbuild executes, the following steps are followed (roughly):
--- 6.2 Add prerequisites to archheaders:
The archheaders: rule is used to generate header files that
may be installed into user space by "make header_install" or
"make headers_install_all". In order to support
"make headers_install_all", this target has to be able to run
on an unconfigured tree, or a tree configured for another
architecture.
may be installed into user space by "make header_install".
It is run before "make archprepare" when run on the
architecture itself.

15
Makefile
View File

@ -1181,34 +1181,23 @@ headerdep:
#Default location for installed headers
export INSTALL_HDR_PATH = $(objtree)/usr
# If we do an all arch process set dst to include/arch-$(SRCARCH)
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
PHONY += archheaders archscripts
PHONY += __headers
__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
$(Q)$(MAKE) $(build)=scripts build_unifdef
PHONY += headers_install_all
headers_install_all:
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
PHONY += headers_install
headers_install: __headers
$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
$(error Headers not exportable for the $(SRCARCH) architecture))
$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
PHONY += headers_check_all
headers_check_all: headers_install_all
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi dst=include
PHONY += headers_check
headers_check: headers_install
$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi dst=include HDRCHECK=1
ifdef CONFIG_HEADERS_CHECK
all: headers_check

29
scripts/headers.sh
View File

@ -1,29 +0,0 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# Run headers_$1 command for all suitable architectures
# Stop on error
set -e
do_command()
{
if [ -f ${srctree}/arch/$2/include/asm/Kbuild ]; then
make ARCH=$2 KBUILD_HEADERS=$1 headers_$1
else
printf "Ignoring arch: %s\n" ${arch}
fi
}
archs=${HDR_ARCH_LIST:-$(ls ${srctree}/arch)}
for arch in ${archs}; do
case ${arch} in
um) # no userspace export
;;
*)
if [ -d ${srctree}/arch/${arch} ]; then
do_command $1 ${arch}
fi
;;
esac
done