kbuild: fix make headers_install when path is too long
[linux-3.10.git] / scripts / depmod.sh
1 #!/bin/sh
2 #
3 # A depmod wrapper used by the toplevel Makefile
4
5 if test $# -ne 3; then
6         echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" >&2
7         exit 1
8 fi
9 DEPMOD=$1
10 KERNELRELEASE=$2
11 SYMBOL_PREFIX=$3
12
13 if ! test -r System.map -a -x "$DEPMOD"; then
14         exit 0
15 fi
16
17 # older versions of depmod don't support -P <symbol-prefix>
18 # support was added in module-init-tools 3.13
19 if test -n "$SYMBOL_PREFIX"; then
20         release=$("$DEPMOD" --version)
21         package=$(echo "$release" | cut -d' ' -f 1)
22         if test "$package" = "module-init-tools"; then
23                 version=$(echo "$release" | cut -d' ' -f 2)
24                 later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
25                 if test "$later" != "$version"; then
26                         # module-init-tools < 3.13, drop the symbol prefix
27                         SYMBOL_PREFIX=""
28                 fi
29         fi
30         if test -n "$SYMBOL_PREFIX"; then
31                 SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
32         fi
33 fi
34
35 # older versions of depmod require the version string to start with three
36 # numbers, so we cheat with a symlink here
37 depmod_hack_needed=true
38 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
39 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
40 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
41         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
42                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
43                 depmod_hack_needed=false
44         fi
45 fi
46 rm -rf "$tmp_dir"
47 if $depmod_hack_needed; then
48         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
49         ln -s "$KERNELRELEASE" "$symlink"
50         KERNELRELEASE=99.98.$KERNELRELEASE
51 fi
52
53 set -- -ae -F System.map
54 if test -n "$INSTALL_MOD_PATH"; then
55         set -- "$@" -b "$INSTALL_MOD_PATH"
56 fi
57 "$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
58 ret=$?
59
60 if $depmod_hack_needed; then
61         rm -f "$symlink"
62 fi
63
64 exit $ret