powerpc/boot: Fix dash warning
'commit b2accfe7ca5b ("powerpc/boot: Check for ld-option support")' suppressed
linker warnings, but the expressed used did not go well with POSIX shell (dash)
resulting with this warning
arch/powerpc/boot/wrapper: 237: [: 0: unexpected operator
ld: warning: arch/powerpc/boot/zImage.epapr has a LOAD segment with RWX permissions
Fix the check to handle the reported warning. Patch also fixes
couple of shellcheck reported errors for the same line.
In arch/powerpc/boot/wrapper line 237:
if [ $(${CROSS}ld -v --no-warn-rwx-segments &>/dev/null; echo $?) -eq 0 ]; then
^-- SC2046 (warning): Quote this to prevent word splitting.
^------^ SC2086 (info): Double quote to prevent globbing and word splitting.
^---------^ SC3020 (warning): In POSIX sh, &> is undefined.
Fixes: b2accfe7ca5b ("powerpc/boot: Check for ld-option support")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250423082154.30625-1-maddy@linux.ibm.com
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 267ca6d..3d8dc82 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -234,7 +234,7 @@
# suppress some warnings in recent ld versions
nowarn="-z noexecstack"
-if [ $(${CROSS}ld -v --no-warn-rwx-segments &>/dev/null; echo $?) -eq 0 ]; then
+if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
nowarn="$nowarn --no-warn-rwx-segments"
fi
