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# $Id$
# A script for building kernel config from multiarch config file.
# It also has some file merging facilities.
#
# usage:
# awk -v basearch=%{_target_base_arch} -v arch=%{_target_cpu} -f path/to/kernel-config.awk \
# kernel-important.config kernel-multiarch.config \
# kernel-%{arch}.config kernel-%{some_feature}.config \
# > .config
#
# Authors:
# - Przemysław Iskra <sparky@pld-linux.org>
# parts based on kernel-config.py, by:
# - arekm@pld-linux.org
# - glen@pld-linux.org
#
# TODO:
# - use as many warnings as possible, we want our configs to be clean
# no:
# CONFIG_SOMETHING=n
# SOMETHING=n
# CONFIG_SOMETHING all=n
# SOMETHING all=n
# # CONFIG_SOMETHING is not set -- special case
# yes/module/other
# CONFIG_SOMETHING=y
# SOMETHING=y
# CONFIG_SOMETHING all=y
# SOMETHING all=y
# return actual file name (without path) and line number
function fileLine() {
f = FILENAME
sub( /^.*\//, "", f ) # strip path
return f " (" FNR ")"
}
function warn( msg ) {
print fileLine() ": " msg > "/dev/stderr"
}
BEGIN {
if ( ! arch ) {
print "arch= must be specified" > "/dev/stderr"
exit 1
}
split( arch, Archs )
for (i = 1; i in Archs; i++) {
targetLevel[ Archs[ i ] ] = i
}
shouldDie = 0
lastFile = ""
}
function dieLater( code ) {
if ( shouldDie < code )
shouldDie = code
}
{
f = FILENAME
sub( /^.*\//, "", f ) # strip path
if ( f != lastFile ) {
print "\n# file: " f
lastFile = f
}
}
# convert special case:
# # CONFIG_SOMETHING it not set
# to:
# SOMETHING all=n
/^# CONFIG_[A-Za-z0-9_]+ is not set$/ {
match( $0, /CONFIG_[A-Za-z0-9_]+/ )
option = substr( $0, RSTART, RLENGTH)
$0 = option " all=n"
}
# ignore all the comments and empty lines
/^#/ || /^\s*$/ {
next
}
!/^[A-Za-z0-9_]+(=|[ \t]+[A-Za-z0-9_-]+=)/ {
warn( "ERROR: Incorrect line: " $0 )
dieLater( 3 )
next
}
!/^CONFIG_/ {
$0 = "CONFIG_" $0
}
{
option = $1
line = $0
value = ""
if ( option ~ /=/ ) {
sub( /=.*$/, "", option )
sub( /^[^=]*=/, "", line )
value = line
} else {
sub( "^" option, "", line )
sub( /^[ \t]*/, "", line )
delete archs
if ( line ~ /"/ ) {
# there can be white spaces
i = 0
while ( match( line, /^[^=]+="([^"]|\\")*"/ ) ) {
archs[ (++i) ] = substr( line, RSTART, RLENGTH )
line = substr( line, RSTART + RLENGTH )
sub( /^[ \t]*/, "", line )
}
} else {
split( line, archs )
}
level = 0
for ( i in archs ) {
arch = val = archs[ i ]
sub( /=.*$/, "", arch )
sub( /^[^=]*=/, "", val )
tl = targetLevel[ arch ]
if ( tl > level ) {
value = val
level = tl
}
}
}
# completely ignore lines with no value
if ( length( value ) == 0 )
next
fileOption = FILENAME "/" option
if ( fileOption in outputByFile ) {
warn( "ERROR: " option " already defined in this file at line " outputByFile[ fileOption ] )
dieLater( 2 )
next
} else
outputByFile[ fileOption ] = FNR
if ( option in outputArray ) {
warn( "Warning: " option " already defined in: " outputArray[ option ] )
next
} else
outputArray[ option ] = fileLine()
if ( value == "n" )
out = "# " option " is not set"
else {
out = option "=" value
if ( value == "y" || value == "m" )
; # OK
else if ( value ~ /^"([^"]|\\")*"$/ )
; # OK
else if ( value ~ /^-?[0-9]+$/ || value ~ /^0x[0-9A-Fa-f]+$/ )
; # OK
else {
warn( "ERROR: Incorrect value: " $0 )
dieLater( 1 )
}
}
print out
}
END {
exit shouldDie
}
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