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# ==========================================================================
# Installing headers
#
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# All headers under include/uapi, include/generated/uapi,
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# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
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# exported.
# They are preprocessed to remove __KERNEL__ section of the file.
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#
# ==========================================================================
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PHONY := __headers
__headers :
i n c l u d e s c r i p t s / K b u i l d . i n c l u d e
srcdir := $( srctree) /$( obj)
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# When make is run under a fakechroot environment, the function
# $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular
# files. So, we are using a combination of sort/dir/wildcard which works
# with fakechroot.
subdirs := $( patsubst $( srcdir) /%/,%,\
$( filter-out $( srcdir) /,\
$( sort $( dir $( wildcard $( srcdir) /*/) ) ) ) )
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# Recursion
__headers : $( subdirs )
.PHONY : $( subdirs )
$(subdirs) :
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$( Q) $( MAKE) $( hdr-inst) = $( obj) /$@ dst = $( dst) /$@
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# 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)
i f e q ( $( skip -inst ) , )
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# Kbuild file is optional
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kbuild-file := $( srctree) /$( obj) /Kbuild
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- i n c l u d e $( kbuild -file )
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installdir := $( INSTALL_HDR_PATH) /$( dst)
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gendir := $( objtree) /$( subst include/,include/generated/,$( obj) )
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header-files := $( notdir $( wildcard $( srcdir) /*.h) )
header-files += $( notdir $( wildcard $( srcdir) /*.agh) )
header-files := $( filter-out $( no-export-headers) , $( header-files) )
genhdr-files := $( notdir $( wildcard $( gendir) /*.h) )
genhdr-files := $( filter-out $( header-files) , $( genhdr-files) )
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# files used to track state of install/check
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install-file := $( installdir) /.install
check-file := $( installdir) /.check
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# all headers files for this dir
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all-files := $( header-files) $( genhdr-files)
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output-files := $( addprefix $( installdir) /, $( all-files) )
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i f n e q ( $( mandatory -y ) , )
missing := $( filter-out $( all-files) ,$( mandatory-y) )
i f n e q ( $( missing ) , )
$( error Some mandatory headers ( $ ( missing ) ) are missing in $ ( obj ) )
e n d i f
e n d i f
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# Work out what needs to be removed
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oldheaders := $( patsubst $( installdir) /%,%,$( wildcard $( installdir) /*.h) )
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unwanted := $( filter-out $( all-files) ,$( oldheaders) )
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# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
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unwanted-file := $( addprefix $( installdir) /, $( unwanted) )
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printdir = $( patsubst $( INSTALL_HDR_PATH) /%/,%,$( dir $@ ) )
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quiet_cmd_install = INSTALL $( printdir) ( $( words $( all-files) ) \
file$( if $( word 2, $( all-files) ) ,s) )
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cmd_install = \
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$( CONFIG_SHELL) $< $( installdir) $( srcdir) $( header-files) ; \
$( CONFIG_SHELL) $< $( installdir) $( gendir) $( genhdr-files) ; \
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touch $@
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quiet_cmd_remove = REMOVE $( unwanted)
cmd_remove = rm -f $( unwanted-file)
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quiet_cmd_check = CHECK $( printdir) ( $( words $( all-files) ) files)
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# Headers list can be pretty long, xargs helps to avoid
# the "Argument list too long" error.
cmd_check = for f in $( all-files) ; do \
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echo " $( installdir) / $$ {f} " ; done \
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| xargs \
$( PERL) $< $( INSTALL_HDR_PATH) /include $( SRCARCH) ; \
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touch $@
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i f n d e f H D R C H E C K
# Rules for installing headers
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__headers : $( install -file )
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@:
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targets += $( install-file)
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$(install-file) : scripts /headers_install .sh \
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$( addprefix $( srcdir) /,$( header-files) ) \
$( addprefix $( gendir) /,$( genhdr-files) ) FORCE
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$( if $( unwanted) ,$( call cmd,remove) ,)
$( if $( wildcard $( dir $@ ) ) ,,$( shell mkdir -p $( dir $@ ) ) )
$( call if_changed,install)
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e l s e
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__headers : $( check -file )
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@:
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targets += $( check-file)
$(check-file) : scripts /headers_check .pl $( output -files ) FORCE
$( call if_changed,check)
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e n d i f
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targets := $( wildcard $( sort $( targets) ) )
cmd_files := $( wildcard \
$( foreach f,$( targets) ,$( dir $( f) ) .$( notdir $( f) ) .cmd) )
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i f n e q ( $( cmd_files ) , )
include $( cmd_files)
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e n d i f
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e n d i f # skip-inst
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.PHONY : $( PHONY )
PHONY += FORCE
FORCE : ;