3 # Script to create/update include/generated/autoksyms.h and dependency files
5 # Copyright: (C) 2016 Linaro Limited
6 # Created by: Nicolas Pitre, January 2016
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License version 2 as
10 # published by the Free Software Foundation.
12 # Create/update the include/generated/autoksyms.h file from the list
13 # of all module's needed symbols as recorded on the third line of
14 # .tmp_versions/*.mod files.
16 # For each symbol being added or removed, the corresponding dependency
17 # file's timestamp is updated to force a rebuild of the affected source
18 # file. All arguments passed to this script are assumed to be a command
19 # to be exec'd to trigger a rebuild of those files.
23 cur_ksyms_file="include/generated/autoksyms.h"
24 new_ksyms_file="include/generated/autoksyms.h.tmpnew"
27 if [ "$quiet" != "silent_" ]; then
28 printf " %-7s %s\n" "$1" "$2"
32 info "CHK" "$cur_ksyms_file"
34 # Use "make V=1" to debug this script.
35 case "$KBUILD_VERBOSE" in
41 # We need access to CONFIG_ symbols
42 case "${KCONFIG_CONFIG}" in
47 # Force using a file from the current directory
48 . "./${KCONFIG_CONFIG}"
51 # In case it doesn't exist yet...
52 if [ -e "$cur_ksyms_file" ]; then touch "$cur_ksyms_file"; fi
54 # Generate a new ksym list file with symbols needed by the current
56 cat > "$new_ksyms_file" << EOT
58 * Automatically generated file; DO NOT EDIT.
62 [ "$(ls -A "$MODVERDIR")" ] &&
63 sed -ns -e '3{s/ /\n/g;/^$/!p;}' "$MODVERDIR"/*.mod | sort -u |
65 if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
68 echo "#define __KSYM_${sym} 1"
69 done >> "$new_ksyms_file"
71 # Special case for modversions (see modpost.c)
72 if [ -n "$CONFIG_MODVERSIONS" ]; then
73 echo "#define __KSYM_module_layout 1" >> "$new_ksyms_file"
76 # Extract changes between old and new list and touch corresponding
80 sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
81 sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
82 while read sympath; do
83 if [ -z "$sympath" ]; then continue; fi
84 depfile="include/config/ksym/${sympath}.h"
85 mkdir -p "$(dirname "$depfile")"
91 if [ $changed -gt 0 ]; then
92 # Replace the old list with tne new one
93 old=$(grep -c "^#define __KSYM_" "$cur_ksyms_file" || true)
94 new=$(grep -c "^#define __KSYM_" "$new_ksyms_file" || true)
95 info "KSYMS" "symbols: before=$old, after=$new, changed=$changed"
96 info "UPD" "$cur_ksyms_file"
97 mv -f "$new_ksyms_file" "$cur_ksyms_file"
98 # Then trigger a rebuild of affected source files
101 rm -f "$new_ksyms_file"