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9413e76405
The *.mod files have two lines; the first line lists the member objects
of the module, and the second line, if CONFIG_TRIM_UNUSED_KSYMS=y, lists
the undefined symbols.
Currently, we generate *.mod after constructing composite modules,
otherwise, we cannot compute the second line. No prerequisite is
required to print the first line.
They are orthogonal. Splitting them into separate commands will ease
further cleanups.
This commit splits the list of undefined symbols out to *.usyms files.
Previously, the list of undefined symbols ended up with a very long
line, but now it has one symbol per line.
Use sed like we did before commit 7d32358be8 ("kbuild: avoid split
lines in .mod files").
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
74 lines
2.1 KiB
Bash
Executable file
74 lines
2.1 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0-only
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# Script to update include/generated/autoksyms.h and dependency files
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#
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# Copyright: (C) 2016 Linaro Limited
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# Created by: Nicolas Pitre, January 2016
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#
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# Update the include/generated/autoksyms.h file.
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#
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# For each symbol being added or removed, the corresponding dependency
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# file's timestamp is updated to force a rebuild of the affected source
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# file. All arguments passed to this script are assumed to be a command
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# to be exec'd to trigger a rebuild of those files.
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set -e
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cur_ksyms_file="include/generated/autoksyms.h"
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new_ksyms_file="include/generated/autoksyms.h.tmpnew"
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info() {
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if [ "$quiet" != "silent_" ]; then
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printf " %-7s %s\n" "$1" "$2"
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fi
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}
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info "CHK" "$cur_ksyms_file"
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# Use "make V=1" to debug this script.
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case "$KBUILD_VERBOSE" in
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*1*)
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set -x
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;;
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esac
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# Generate a new symbol list file
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$CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh --modorder "$new_ksyms_file"
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# Extract changes between old and new list and touch corresponding
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# dependency files.
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changed=$(
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count=0
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sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
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sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' |
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while read sympath; do
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if [ -z "$sympath" ]; then continue; fi
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depfile="include/ksym/${sympath}"
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mkdir -p "$(dirname "$depfile")"
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touch "$depfile"
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# Filesystems with coarse time precision may create timestamps
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# equal to the one from a file that was very recently built and that
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# needs to be rebuild. Let's guard against that by making sure our
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# dep files are always newer than the first file we created here.
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while [ ! "$depfile" -nt "$new_ksyms_file" ]; do
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touch "$depfile"
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done
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echo $((count += 1))
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done | tail -1 )
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changed=${changed:-0}
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if [ $changed -gt 0 ]; then
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# Replace the old list with tne new one
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old=$(grep -c "^#define __KSYM_" "$cur_ksyms_file" || true)
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new=$(grep -c "^#define __KSYM_" "$new_ksyms_file" || true)
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info "KSYMS" "symbols: before=$old, after=$new, changed=$changed"
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info "UPD" "$cur_ksyms_file"
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mv -f "$new_ksyms_file" "$cur_ksyms_file"
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# Then trigger a rebuild of affected source files
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exec $@
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else
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rm -f "$new_ksyms_file"
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fi
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