mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-18 12:24:38 +08:00
c0e97c8525
The generated mloop files can trigger compile time warnings. It can be difficult to see/understand where the original code is coming from as all the diagnostics point to the generated output. Using #line pragmas, we can point people to the original source files. Unfortunately, this code is written in POSIX shell, and that lacks support for line number tracking. The $LINENO variable, even when available, can just be plain wrong. For example, when using dash and subshells, $LINENO can end up having negative values. Add a wrapper script that will uses awk to rewrite the $LINENO variable to the right value to avoid all that. Basically lineno.sh takes an input script, rewrites all uses of $LINENO into the actual line number (and $0 into the original file name), and then executes the temporary script. This commit doesn't actually add #line pragmas to any files. That comes next.
45 lines
1.2 KiB
Bash
Executable File
45 lines
1.2 KiB
Bash
Executable File
#!/bin/sh
|
|
# Replace $LINENO on the fly.
|
|
# Copyright (C) 2023 Free Software Foundation, Inc.
|
|
#
|
|
# This file is part of the GNU simulators.
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
# Since $LINENO is not reliable in shells/subshells, generate it on the fly.
|
|
|
|
if [ $# -lt 2 ]; then
|
|
cat <<EOF >&2
|
|
Usage: $0 <script> <tempfile> [script args]
|
|
|
|
Rewrite the $LINENO usage in <script> with the line number. The temp script is
|
|
written to <tempfile>, and then removed when done.
|
|
EOF
|
|
exit 1
|
|
fi
|
|
|
|
input=$1
|
|
shift
|
|
output=$1
|
|
shift
|
|
|
|
${AWK:-awk} '{
|
|
gsub("[$]LINENO", NR + 1)
|
|
gsub("\"[$]0\"", "\"" FILENAME "\"")
|
|
print
|
|
}' "${input}" >"${output}"
|
|
${SHELL} "${output}" "$@"
|
|
|
|
rm -f "${output}"
|