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* [binutils-gdb] gdb: fix shellcheck warnings SC2154 (referenced but not assigned) in gdbarch.sh
@ 2020-04-30 0:37 Simon Marchi
0 siblings, 0 replies; only message in thread
From: Simon Marchi @ 2020-04-30 0:37 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=1207375d768ae2b901c3bea6543b610c461160dd
commit 1207375d768ae2b901c3bea6543b610c461160dd
Author: Simon Marchi <simon.marchi@efficios.com>
Date: Wed Apr 29 20:35:35 2020 -0400
gdb: fix shellcheck warnings SC2154 (referenced but not assigned) in gdbarch.sh
Fix all instances of this kind of warning:
In gdbarch.sh line 96:
m ) staticdefault="${predefault}" ;;
^-----------^ SC2154: predefault is referenced but not assigned.
These warnings appear because we are doing something a bit funky when reading
the gdbarch fields. These variables are not assigned explicitly, but
using some `eval` commands.
I don't think there is so much we can fix about those warnings. To
silence them, I've changed `${foo}` to `${foo:-}`. This tells the shell
to substitute with an empty string if `foo` is not defined. This
retains the current behavior, but the warnings go away.
gdb/ChangeLog:
* gdbarch.sh: Use ${foo:-} where shellcheck would report a
"referenced but not assigned" warning.
Diff:
---
gdb/ChangeLog | 5 +++++
gdb/gdbarch.sh | 14 +++++++-------
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index dee9a6edd3b..eb6841640b9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-29 Simon Marchi <simon.marchi@efficios.com>
+
+ * gdbarch.sh: Use ${foo:-} where shellcheck would report a
+ "referenced but not assigned" warning.
+
2020-04-29 Simon Marchi <simon.marchi@efficios.com>
* gdbarch.sh: Remove code that sets fallbackdefault.
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 4e4cc827b89..24f8cdfe90b 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -75,7 +75,7 @@ ${line}
EOF
IFS="${OFS}"
- if test -n "${garbage_at_eol}"
+ if test -n "${garbage_at_eol:-}"
then
echo "Garbage at end-of-line in ${line}" 1>&2
kill $$
@@ -93,19 +93,19 @@ EOF
done
case "${class}" in
- m ) staticdefault="${predefault}" ;;
+ m ) staticdefault="${predefault:-}" ;;
M ) staticdefault="0" ;;
* ) test "${staticdefault}" || staticdefault=0 ;;
esac
case "${class}" in
F | V | M )
- case "${invalid_p}" in
+ case "${invalid_p:-}" in
"" )
if test -n "${predefault}"
then
#invalid_p="gdbarch->${function} == ${predefault}"
- predicate="gdbarch->${function} != ${predefault}"
+ predicate="gdbarch->${function:-} != ${predefault}"
elif class_is_variable_p
then
predicate="gdbarch->${function} != 0"
@@ -139,7 +139,7 @@ EOF
fallback_default_p ()
{
- { [ -n "${postdefault}" ] && [ "x${invalid_p}" != "x0" ]; } \
+ { [ -n "${postdefault:-}" ] && [ "x${invalid_p}" != "x0" ]; } \
|| { [ -n "${predefault}" ] && [ "x${invalid_p}" = "x0" ]; }
}
@@ -1206,7 +1206,7 @@ exec > new-gdbarch.log
function_list | while do_read
do
cat <<EOF
-${class} ${returntype} ${function} ($formal)
+${class} ${returntype:-} ${function} (${formal:-})
EOF
for r in ${read}
do
@@ -2119,7 +2119,7 @@ do
fi
printf " if (gdbarch_debug >= 2)\n"
printf " fprintf_unfiltered (gdb_stdlog, \"gdbarch_%s called\\\\n\");\n" "$function"
- if [ "x${actual}" = "x-" ] || [ "x${actual}" = "x" ]
+ if [ "x${actual:-}" = "x-" ] || [ "x${actual:-}" = "x" ]
then
if class_is_multiarch_p
then
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2020-04-30 0:37 [binutils-gdb] gdb: fix shellcheck warnings SC2154 (referenced but not assigned) in gdbarch.sh Simon Marchi
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