#!/bin/sh
#
# A depmod wrapper used by the toplevel Makefile

if test $Argc -ne 3 {
	echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" > !2
	exit 1
}
global DEPMOD := $1
global KERNELRELEASE := $2
global SYMBOL_PREFIX := $3

if ! test -r System.map -a -x $DEPMOD {
	exit 0
}

# older versions of depmod don't support -P <symbol-prefix>
# support was added in module-init-tools 3.13
if test -n $SYMBOL_PREFIX {
	global release := $[$DEPMOD --version]
	global package := $[echo $release | cut -d' ' -f 1]
	if test $package = "module-init-tools" {
		global version := $[echo $release | cut -d' ' -f 2]
		global later := $[printf '%s\n' $version "3.13" | sort -V | tail -n 1]
		if test $later != $version {
			# module-init-tools < 3.13, drop the symbol prefix
			global SYMBOL_PREFIX := ''""
		}
	}
	if test -n $SYMBOL_PREFIX {
		global SYMBOL_PREFIX := ""-P $SYMBOL_PREFIX""
	}
}

# older versions of depmod require the version string to start with three
# numbers, so we cheat with a symlink here
global depmod_hack_needed := 'true'
global tmp_dir := $[mktemp -d $(TMPDIR:-/tmp)/depmod.XXXXXX]
mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
if $DEPMOD -b $tmp_dir $KERNELRELEASE !2 >/dev/null {
	if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
		-e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin" {
		global depmod_hack_needed := 'false'
	}
}
rm -rf $tmp_dir
if $depmod_hack_needed {
	global symlink := ""$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE""
	ln -s $KERNELRELEASE $symlink
	global KERNELRELEASE := "99.98.$KERNELRELEASE"
}

set -- -ae -F System.map
if test -n $INSTALL_MOD_PATH {
	set -- @Argv -b $INSTALL_MOD_PATH
}
$DEPMOD @Argv $KERNELRELEASE $SYMBOL_PREFIX
global ret := $Status

if $depmod_hack_needed {
	rm -f $symlink
}

exit $ret
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