scripts/gen-compat-autoconf.sh - nest-cam/v366/compat-wireless - Git at Google

 #!/bin/bash
 #
 # Copyright 2007	Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
 #
 # Use this to parse a small .config equivalent looking file to generate
 # our own autoconf.h. This file has defines for each config option
 # just like the kernels include/linux/autoconf.h
 #
 # XXX: consider using scripts/kconfig/confdata.c instead.
 # On the downside this would require the user to have libc though.

 # This indicates which is the oldest kernel we support
 # Update this if you are adding support for older kernels.
 OLDEST_KERNEL_SUPPORTED="2.6.24"
 COMPAT_RELEASE="compat_version"
 KERNEL_RELEASE="compat_base_tree_version"
 MULT_DEP_FILE=".compat_pivot_dep"

 if [ $# -ne 1 ]; then
 	echo "Usage $0 config-file"
 	exit
 fi

 COMPAT_CONFIG="$1"

 if [ ! -f $COMPAT_CONFIG ]; then
 	echo "File $1 is not a file"
 	exit
 fi

 if [ ! -f $COMPAT_RELEASE  -o ! -f $KERNEL_RELEASE ]; then
 	echo "Error: $COMPAT_RELEASE or $KERNEL_RELEASE file is missing"
 	exit
 fi

 CREL=$(cat $COMPAT_RELEASE | tail -1)
 KREL=$(cat $KERNEL_RELEASE | tail -1)
 DATE=$(date)

 # Defines a CONFIG_ option if not defined yet, this helps respect
 # linux/autoconf.h
 function define_config {
 	VAR=$1
 	VALUE=$2
 	case $VALUE in
 	n) # Try to undefine it
 		echo "#undef $VAR"
 		;;
 	y)
 		echo "#ifndef $VAR"
 		echo "#define $VAR 1"
 		echo "#endif /* $VAR */ "
 		;;
 	m)
 		echo "#ifndef $VAR"
 		echo "#define $VAR 1"
 		echo "#endif /* $VAR */ "
 		;;
 	*) # Assume string
 		# XXX: add better checks to make sure what was on
 		# the right was indeed a string
 		echo "#ifndef $VAR"
 		echo "#define $VAR \"$VALUE\""
 		echo "#endif /* $VAR */ "
 		;;
 	esac
 }

 # This deals with core compat-wireless kernel requirements.
 function define_config_req {
 	VAR=$1
 	echo "#ifndef $VAR"
 	echo -n "#error Compat-wireless requirement: $VAR must be enabled "
 	echo "in your kernel"
 	echo "#endif /* $VAR */"
 }

 # This handles modules which have dependencies from the kernel
 # which compat-wireless isn't providing yet either because
 # the dependency is not available as kernel module or
 # the module simply isn't provided by compat-wireless.
 function define_config_dep {
 	VAR=$1
 	VALUE=$2
 	DEP=$3
 	WARN_VAR="COMPAT_WARN_$VAR"
 	echo "#ifdef $DEP"
 	define_config $VAR $VALUE
 	echo "#else"
 	# XXX: figure out a way to warn only once
 	# define only once in case user tried to enable config option
 	# twice in config.mk
 	echo "#ifndef $WARN_VAR"
 	# Lets skip these for now.. they might be too annoying
 	#echo "#warning Skipping $VAR as $DEP was needed... "
 	#echo "#warning This just means $VAR won't be built and is not fatal."
 	echo "#define $WARN_VAR"
 	echo "#endif /* $VAR */"
 	echo "#endif /* $WARN_VAR */"
 }

 # This handles options which have *multiple* dependencies from the kernel
 function define_config_multiple_deps {
 	VAR=$1
 	VALUE=$2
 	DEP_ARRAY=$3

 	# First, put all ifdefs
 	for i in $(cat $MULT_DEP_FILE); do
 		echo "#ifdef $i"
 	done

 	# Now put our option in the middle
 	define_config $VAR $VALUE

 	# Now close all ifdefs
 	# First, put all ifdefs
 	for i in $(cat $MULT_DEP_FILE); do
 		echo "#endif"
 	done

 }

 function kernel_version_req {
 	VERSION=$(echo $1 | sed -e 's/\./,/g')
 	echo "#if (LINUX_VERSION_CODE < KERNEL_VERSION($VERSION))"
 	echo "#error Compat-wireless requirement: Linux >= $VERSION"
 	echo "#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION($VERSION) */ "
 }

 cat <<EOF
 #ifndef COMPAT_AUTOCONF_INCLUDED
 #define COMPAT_AUTOCONF_INCLUDED
 /*
  * Automatically generated C config: don't edit
  * $DATE
  * compat-wireless-2.6: $CREL
  * linux-2.6: $KREL
  */
 #define COMPAT_RELEASE "$CREL"
 #define COMPAT_KERNEL_RELEASE "$KREL"
 EOF

 # Checks user is compiling against a kernel we support
 kernel_version_req $OLDEST_KERNEL_SUPPORTED

 # For each CONFIG_FOO=x option
 for i in $(egrep '^CONFIG_|^ifdef CONFIG_|^ifndef CONFIG_|^endif #CONFIG_|^else #CONFIG_' $COMPAT_CONFIG | sed 's/ /+/'); do
 	case $i in
 	'ifdef+CONFIG_'* )
 		echo "#$i" | sed -e 's/+/ /' -e 's/\(ifdef CONFIG_COMPAT_KERNEL_3_\)\([0-9]*\)/if (LINUX_VERSION_CODE < KERNEL_VERSION(3,\2,0))/' -e 's/\(ifdef CONFIG_COMPAT_KERNEL_2_6_\)\([0-9]*\)/if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,\2))/' -e 's/\(ifdef CONFIG_COMPAT_RHEL_\)\([0-9]*\)_\([0-9]*\)/if (defined(RHEL_MAJOR) \&\& RHEL_MAJOR == \2 \&\& RHEL_MINOR >= \3)/' -e 's/\(#ifdef \)\(CONFIG_[^:space:]*\)/#if defined(\2) || defined(\2_MODULE)/'
 		continue
 		;;
 	'ifndef+CONFIG_'* )
 		echo "#$i" | sed -e 's/+/ /' -e 's/\(ifndef CONFIG_COMPAT_KERNEL_3_\)\([0-9]*\)/if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,\2,0))/' -e 's/\(ifndef CONFIG_COMPAT_KERNEL_2_6_\)\([0-9]*\)/if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,\2))/' -e 's/\(ifndef CONFIG_COMPAT_RHEL_\)\([0-9]*\)_\([0-9]*\)/if (!defined(RHEL_MAJOR) || RHEL_MAJOR != \2 || RHEL_MINOR < \3)/' -e 's/\(#ifndef \)\(CONFIG_[^:space:]*\)/#if !defined(\2) \&\& !defined(\2_MODULE)/'
 		continue
 		;;
 	'else+#CONFIG_'* | 'endif+#CONFIG_'* )
 		echo "#$i */" |sed -e 's/+#/ \/* /g'
 		continue
 		;;
 	CONFIG_* )
 		# Get the element on the left of the "="
 		VAR=$(echo $i | cut -d"=" -f 1)
 		# Get the element on the right of the "="
 		VALUE=$(echo $i | cut -d"=" -f 2)

 		# Handle core kernel module depenencies here.
 		case $VAR in
 		# ignore this, we have a special hanlder for this at the botttom
 		# instead. We still need to keep this in config.mk to let Makefiles
 		# know its enabled so just ignore it here.
 		CONFIG_MAC80211_QOS)
 			continue
 			;;
 		esac
 		# Any other module which can *definitely* be built as a module goes here
 		define_config $VAR $VALUE
 		continue
 		;;
 	esac
 done

 # Deal with special cases. CONFIG_MAC80211_QOS is such a case.
 # We handle this specially for different kernels we support.
 if [ -f $KLIB_BUILD/Makefile ]; then
 	MAJORLEVEL=$(make -C $KLIB_BUILD kernelversion | sed -n 's/^\([0-9]\)\..*/\1/p')
 	SUBLEVEL=$(make -C $KLIB_BUILD kernelversion | sed -n 's/^\(2\.6\|[3-9]\)\.\([0-9]\+\).*/\2/p')
 	if [ $MAJORLEVEL -eq 2 -a $SUBLEVEL -le 22 ]; then
 		define_config CONFIG_MAC80211_QOS y
 	else # kernel >= 2.6.23
 		# CONFIG_MAC80211_QOS on these kernels requires
 		# CONFIG_NET_SCHED and CONFIG_NETDEVICES_MULTIQUEUE
 		rm -f $MULT_DEP_FILE
 		echo CONFIG_NET_SCHED >> $MULT_DEP_FILE
 		echo CONFIG_NETDEVICES_MULTIQUEUE >> $MULT_DEP_FILE
 		define_config_multiple_deps CONFIG_MAC80211_QOS y $ALL_DEPS
 		rm -f $MULT_DEP_FILE
 	fi
 fi
 echo "#endif /* COMPAT_AUTOCONF_INCLUDED */"
	#!/bin/bash
	#
	# Copyright 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
	#
	# Use this to parse a small .config equivalent looking file to generate
	# our own autoconf.h. This file has defines for each config option
	# just like the kernels include/linux/autoconf.h
	#
	# XXX: consider using scripts/kconfig/confdata.c instead.
	# On the downside this would require the user to have libc though.

	# This indicates which is the oldest kernel we support
	# Update this if you are adding support for older kernels.
	OLDEST_KERNEL_SUPPORTED="2.6.24"
	COMPAT_RELEASE="compat_version"
	KERNEL_RELEASE="compat_base_tree_version"
	MULT_DEP_FILE=".compat_pivot_dep"

	if [ $# -ne 1 ]; then
	echo "Usage $0 config-file"
	exit
	fi

	COMPAT_CONFIG="$1"

	if [ ! -f $COMPAT_CONFIG ]; then
	echo "File $1 is not a file"
	exit
	fi

	if [ ! -f $COMPAT_RELEASE -o ! -f $KERNEL_RELEASE ]; then
	echo "Error: $COMPAT_RELEASE or $KERNEL_RELEASE file is missing"
	exit
	fi

	CREL=$(cat $COMPAT_RELEASE \| tail -1)
	KREL=$(cat $KERNEL_RELEASE \| tail -1)
	DATE=$(date)

	# Defines a CONFIG_ option if not defined yet, this helps respect
	# linux/autoconf.h
	function define_config {
	VAR=$1
	VALUE=$2
	case $VALUE in
	n) # Try to undefine it
	echo "#undef $VAR"
	;;
	y)
	echo "#ifndef $VAR"
	echo "#define $VAR 1"
	echo "#endif /* $VAR */ "
	;;
	m)
	echo "#ifndef $VAR"
	echo "#define $VAR 1"
	echo "#endif /* $VAR */ "
	;;
	*) # Assume string
	# XXX: add better checks to make sure what was on
	# the right was indeed a string
	echo "#ifndef $VAR"
	echo "#define $VAR \"$VALUE\""
	echo "#endif /* $VAR */ "
	;;
	esac
	}

	# This deals with core compat-wireless kernel requirements.
	function define_config_req {
	VAR=$1
	echo "#ifndef $VAR"
	echo -n "#error Compat-wireless requirement: $VAR must be enabled "
	echo "in your kernel"
	echo "#endif /* $VAR */"
	}

	# This handles modules which have dependencies from the kernel
	# which compat-wireless isn't providing yet either because
	# the dependency is not available as kernel module or
	# the module simply isn't provided by compat-wireless.
	function define_config_dep {
	VAR=$1
	VALUE=$2
	DEP=$3
	WARN_VAR="COMPAT_WARN_$VAR"
	echo "#ifdef $DEP"
	define_config $VAR $VALUE
	echo "#else"
	# XXX: figure out a way to warn only once
	# define only once in case user tried to enable config option
	# twice in config.mk
	echo "#ifndef $WARN_VAR"
	# Lets skip these for now.. they might be too annoying
	#echo "#warning Skipping $VAR as $DEP was needed... "
	#echo "#warning This just means $VAR won't be built and is not fatal."
	echo "#define $WARN_VAR"
	echo "#endif /* $VAR */"
	echo "#endif /* $WARN_VAR */"
	}

	# This handles options which have multiple dependencies from the kernel
	function define_config_multiple_deps {
	VAR=$1
	VALUE=$2
	DEP_ARRAY=$3

	# First, put all ifdefs
	for i in $(cat $MULT_DEP_FILE); do
	echo "#ifdef $i"
	done

	# Now put our option in the middle
	define_config $VAR $VALUE

	# Now close all ifdefs
	# First, put all ifdefs
	for i in $(cat $MULT_DEP_FILE); do
	echo "#endif"
	done

	}

	function kernel_version_req {
	VERSION=$(echo $1 \| sed -e 's/\./,/g')
	echo "#if (LINUX_VERSION_CODE < KERNEL_VERSION($VERSION))"
	echo "#error Compat-wireless requirement: Linux >= $VERSION"
	echo "#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION($VERSION) */ "
	}

	cat <<EOF
	#ifndef COMPAT_AUTOCONF_INCLUDED
	#define COMPAT_AUTOCONF_INCLUDED
	/*
	* Automatically generated C config: don't edit
	* $DATE
	* compat-wireless-2.6: $CREL
	* linux-2.6: $KREL
	*/
	#define COMPAT_RELEASE "$CREL"
	#define COMPAT_KERNEL_RELEASE "$KREL"
	EOF

	# Checks user is compiling against a kernel we support
	kernel_version_req $OLDEST_KERNEL_SUPPORTED

	# For each CONFIG_FOO=x option
	for i in $(egrep '^CONFIG_\|^ifdef CONFIG_\|^ifndef CONFIG_\|^endif #CONFIG_\|^else #CONFIG_' $COMPAT_CONFIG \| sed 's/ /+/'); do
	case $i in
	'ifdef+CONFIG_'* )
	echo "#$i" \| sed -e 's/+/ /' -e 's/\(ifdef CONFIG_COMPAT_KERNEL_3_\)\([0-9]\)/if (LINUX_VERSION_CODE < KERNEL_VERSION(3,\2,0))/' -e 's/\(ifdef CONFIG_COMPAT_KERNEL_2_6_\)\([0-9]\)/if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,\2))/' -e 's/\(ifdef CONFIG_COMPAT_RHEL_\)\([0-9]\)_\([0-9]\)/if (defined(RHEL_MAJOR) \&\& RHEL_MAJOR == \2 \&\& RHEL_MINOR >= \3)/' -e 's/\(#ifdef \)\(CONFIG_[^:space:]*\)/#if defined(\2) \|\| defined(\2_MODULE)/'
	continue
	;;
	'ifndef+CONFIG_'* )
	echo "#$i" \| sed -e 's/+/ /' -e 's/\(ifndef CONFIG_COMPAT_KERNEL_3_\)\([0-9]\)/if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,\2,0))/' -e 's/\(ifndef CONFIG_COMPAT_KERNEL_2_6_\)\([0-9]\)/if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,\2))/' -e 's/\(ifndef CONFIG_COMPAT_RHEL_\)\([0-9]\)_\([0-9]\)/if (!defined(RHEL_MAJOR) \|\| RHEL_MAJOR != \2 \|\| RHEL_MINOR < \3)/' -e 's/\(#ifndef \)\(CONFIG_[^:space:]*\)/#if !defined(\2) \&\& !defined(\2_MODULE)/'
	continue
	;;
	'else+#CONFIG_'* \| 'endif+#CONFIG_'* )
	echo "#$i /" \|sed -e 's/+#/ \/ /g'
	continue
	;;
	CONFIG_* )
	# Get the element on the left of the "="
	VAR=$(echo $i \| cut -d"=" -f 1)
	# Get the element on the right of the "="
	VALUE=$(echo $i \| cut -d"=" -f 2)

	# Handle core kernel module depenencies here.
	case $VAR in
	# ignore this, we have a special hanlder for this at the botttom
	# instead. We still need to keep this in config.mk to let Makefiles
	# know its enabled so just ignore it here.
	CONFIG_MAC80211_QOS)
	continue
	;;
	esac
	# Any other module which can definitely be built as a module goes here
	define_config $VAR $VALUE
	continue
	;;
	esac
	done

	# Deal with special cases. CONFIG_MAC80211_QOS is such a case.
	# We handle this specially for different kernels we support.
	if [ -f $KLIB_BUILD/Makefile ]; then
	MAJORLEVEL=$(make -C $KLIB_BUILD kernelversion \| sed -n 's/^\([0-9]\)\..*/\1/p')
	SUBLEVEL=$(make -C $KLIB_BUILD kernelversion \| sed -n 's/^\(2\.6\\|[3-9]\)\.\([0-9]\+\).*/\2/p')
	if [ $MAJORLEVEL -eq 2 -a $SUBLEVEL -le 22 ]; then
	define_config CONFIG_MAC80211_QOS y
	else # kernel >= 2.6.23
	# CONFIG_MAC80211_QOS on these kernels requires
	# CONFIG_NET_SCHED and CONFIG_NETDEVICES_MULTIQUEUE
	rm -f $MULT_DEP_FILE
	echo CONFIG_NET_SCHED >> $MULT_DEP_FILE
	echo CONFIG_NETDEVICES_MULTIQUEUE >> $MULT_DEP_FILE
	define_config_multiple_deps CONFIG_MAC80211_QOS y $ALL_DEPS
	rm -f $MULT_DEP_FILE
	fi
	fi
	echo "#endif /* COMPAT_AUTOCONF_INCLUDED */"