Unverified Commit be55899b authored by Mickaël Salaün's avatar Mickaël Salaün Committed by Nathan Chancellor
Browse files

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: d81d9d38 ("kbuild: don't enable CC_CAN_LINK if the dummy program generates warnings")
Signed-off-by: default avatarMickaël Salaün <mic@digikod.net>
Reviewed-by: default avatarNicolas Schier <nsc@kernel.org>
Reviewed-by: default avatarThomas Weißschuh <thomas.weissschuh@linutronix.de>
Link: https://patch.msgid.link/20260212133544.1331437-1-mic@digikod.net


Signed-off-by: default avatarNathan Chancellor <nathan@kernel.org>
parent 68b4fe32

scripts/cc-can-link.sh

+1 −1
Original line number Diff line number Diff line
@@ -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