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kbuild: prefer ${NM} in check-function-names.sh

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The check-function-names.sh scripts invokes 'nm' directly and this can
be problematic during cross-compilation when the toolchain is different
from the system's default (e.g. LLVM=1).

  scripts/check-function-names.sh: nm: not found

Let's prefer the ${NM} variable which is already set by kbuild. However,
still fallback to plain 'nm' to ensure the script is still usable when
called directly.

Fixes: 93863f3f85 ("kbuild: Check for functions with ambiguous -ffunction-sections section names")
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://patch.msgid.link/20251218175824.3122690-1-cmllamas@google.com
Signed-off-by: Nicolas Schier <nsc@kernel.org>
This commit is contained in:
Carlos Llamas
2025-12-18 17:58:06 +00:00
committed by Nicolas Schier
parent 0f61b1860c
commit 946d462346
1 changed files with 1 additions and 1 deletions
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scripts/check-function-names.sh
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@@ -13,7 +13,7 @@ if [ ! -f "$objfile" ]; then
exit 1 exit 1
fi fi
bad_symbols=$(nm "$objfile" | awk '$2 ~ /^[TtWw]$/ {print $3}' | grep -E '^(startup|exit|split|unlikely|hot|unknown)(\.|$)') bad_symbols=$(${NM:-nm} "$objfile" | awk '$2 ~ /^[TtWw]$/ {print $3}' | grep -E '^(startup|exit|split|unlikely|hot|unknown)(\.|$)')
if [ -n "$bad_symbols" ]; then if [ -n "$bad_symbols" ]; then
echo "$bad_symbols" | while read -r sym; do echo "$bad_symbols" | while read -r sym; do