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| author | Mickaël Salaün <mic@digikod.net> | 2026-02-12 16:35:43 +0300 |
|---|---|---|
| committer | Nathan Chancellor <nathan@kernel.org> | 2026-02-13 22:23:06 +0300 |
| commit | be55899b71630c79ad01df54c92e467e47644f87 (patch) | |
| tree | e7f919e3d7c616a8d6b171ed393d70934b332249 /scripts | |
| parent | 68b4fe32d73789dea23e356f468de67c8367ef8f (diff) | |
| download | linux-be55899b71630c79ad01df54c92e467e47644f87.tar.xz | |
kbuild: Fix CC_CAN_LINK detection
Most samples cannot be build on some environments because they depend
on CC_CAN_LINK, which is set according to the result of
scripts/cc-can-link.sh called by cc_can_link_user.
Because cc-can-link.sh must now build without warning, it may fail
because it is calling printf() with an empty string:
+ cat
+ gcc -m32 -Werror -Wl,--fatal-warnings -x c - -o /dev/null
<stdin>: In function ‘main’:
<stdin>:4:9: error: zero-length gnu_printf format string [-Werror=format-zero-length]
cc1: all warnings being treated as errors
Fix this warning and the samples build by actually printing something.
Cc: stable@vger.kernel.org
Fixes: d81d9d389b9b ("kbuild: don't enable CC_CAN_LINK if the dummy program generates warnings")
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20260212133544.1331437-1-mic@digikod.net
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/cc-can-link.sh | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/cc-can-link.sh b/scripts/cc-can-link.sh index e67fd8d7b684..58dc7dd6d556 100755 --- a/scripts/cc-can-link.sh +++ b/scripts/cc-can-link.sh @@ -5,7 +5,7 @@ cat << "END" | $@ -Werror -Wl,--fatal-warnings -x c - -o /dev/null >/dev/null 2> #include <stdio.h> int main(void) { - printf(""); + printf("\n"); return 0; } END |