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kbuild: fix make headers_install when path is too long

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If headers_install is executed from a deep/long directory structure, the
shell's maximum argument length can be execeeded, which breaks the operation
with:

| make[2]: execvp: /bin/sh: Argument list too long
| make[2]: ***

Instead of passing each files name with the entire path, I give only the file
name without the source path and give this path as a new argument to
headers_install.pl.

Because there is three possible paths, I have tree input-files list, one per
path.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Tested-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Nicolas Dichtel 2013-04-29 14:15:51 +02:00 committed by Michal Marek
parent f722406faa
commit c0ff68f161
2 changed files with 19 additions and 8 deletions
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20
scripts/Makefile.headersinst
View File

@ -47,18 +47,24 @@ header-y := $(filter-out $(generic-y), $(header-y))
all-files := $(header-y) $(genhdr-y) $(wrapper-files)
output-files := $(addprefix $(installdir)/, $(all-files))
input-files := $(foreach hdr, $(header-y), \
input-files1 := $(foreach hdr, $(header-y), \
$(if $(wildcard $(srcdir)/$(hdr)), \
$(wildcard $(srcdir)/$(hdr)), \
$(wildcard $(srcdir)/$(hdr))) \
)
input-files1-name := $(notdir $(input-files1))
input-files2 := $(foreach hdr, $(header-y), \
$(if $(wildcard $(srcdir)/$(hdr)),, \
$(if $(wildcard $(oldsrcdir)/$(hdr)), \
$(wildcard $(oldsrcdir)/$(hdr)), \
$(error Missing UAPI file $(srcdir)/$(hdr))) \
)) \
$(foreach hdr, $(genhdr-y), \
))
input-files2-name := $(notdir $(input-files2))
input-files3 := $(foreach hdr, $(genhdr-y), \
$(if $(wildcard $(gendir)/$(hdr)), \
$(wildcard $(gendir)/$(hdr)), \
$(error Missing generated UAPI file $(gendir)/$(hdr)) \
))
input-files3-name := $(notdir $(input-files3))
# Work out what needs to be removed
oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
@ -72,7 +78,9 @@ printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
file$(if $(word 2, $(all-files)),s))
cmd_install = \
$(CONFIG_SHELL) $< $(installdir) $(input-files); \
$(CONFIG_SHELL) $< $(installdir) $(srcdir) $(input-files1-name); \
$(CONFIG_SHELL) $< $(installdir) $(oldsrcdir) $(input-files2-name); \
$(CONFIG_SHELL) $< $(installdir) $(gendir) $(input-files3-name); \
for F in $(wrapper-files); do \
echo "\#include <asm-generic/$$F>" > $(installdir)/$$F; \
done; \
@ -98,7 +106,7 @@ __headersinst: $(subdirs) $(install-file)
@:
targets += $(install-file)
$(install-file): scripts/headers_install.sh $(input-files) FORCE
$(install-file): scripts/headers_install.sh $(input-files1) $(input-files2) $(input-files3) FORCE
$(if $(unwanted),$(call cmd,remove),)
$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
$(call if_changed,install)

7
scripts/headers_install.sh
View File

@ -2,7 +2,7 @@
if [ $# -lt 1 ]
then
echo "Usage: headers_install.sh OUTDIR [FILES...]
echo "Usage: headers_install.sh OUTDIR SRCDIR [FILES...]
echo
echo "Prepares kernel header files for use by user space, by removing"
echo "all compiler.h definitions and #includes, removing any"
@ -10,6 +10,7 @@ then
echo "asm/inline/volatile keywords."
echo
echo "OUTDIR: directory to write each userspace header FILE to."
echo "SRCDIR: source directory where files are picked."
echo "FILES: list of header files to operate on."
exit 1
@ -19,6 +20,8 @@ fi
OUTDIR="$1"
shift
SRCDIR="$1"
shift
# Iterate through files listed on command line
@ -34,7 +37,7 @@ do
-e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
-e 's/(^|[ \t(])(inline|asm|volatile)([ \t(]|$)/\1__\2__\3/g' \
-e 's@#(ifndef|define|endif[ \t]*/[*])[ \t]*_UAPI@#\1 @' \
"$i" > "$OUTDIR/$FILE.sed" || exit 1
"$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
> "$OUTDIR/$FILE"
[ $? -gt 1 ] && exit 1