6.18-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Weißschuh thomas.weissschuh@linutronix.de
[ Upstream commit d81d9d389b9b73acd68f300c8889c7fa1acd4977 ]
It is possible that the kernel toolchain generates warnings when used together with the system toolchain. This happens for example when the older kernel toolchain does not handle new versions of sframe debug information. While these warnings where ignored during the evaluation of CC_CAN_LINK, together with CONFIG_WERROR the actual userprog build will later fail.
Example warning:
.../x86_64-linux/13.2.0/../../../../x86_64-linux/bin/ld: error in /lib/../lib64/crt1.o(.sframe); no .sframe will be created collect2: error: ld returned 1 exit status
Make sure that the very simple example program does not generate warnings already to avoid breaking the userprog compilations.
Fixes: ec4a3992bc0b ("kbuild: respect CONFIG_WERROR for linker and assembler") Fixes: 3f0ff4cc6ffb ("kbuild: respect CONFIG_WERROR for userprogs") Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de Reviewed-by: Nicolas Schier nsc@kernel.org Reviewed-by: Nathan Chancellor nathan@kernel.org Link: https://patch.msgid.link/20251114-kbuild-userprogs-bits-v3-1-4dee0d74d439@li... Signed-off-by: Nicolas Schier nsc@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- scripts/cc-can-link.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/cc-can-link.sh b/scripts/cc-can-link.sh index 6efcead319898..e67fd8d7b6841 100755 --- a/scripts/cc-can-link.sh +++ b/scripts/cc-can-link.sh @@ -1,7 +1,7 @@ #!/bin/sh # SPDX-License-Identifier: GPL-2.0
-cat << "END" | $@ -x c - -o /dev/null >/dev/null 2>&1 +cat << "END" | $@ -Werror -Wl,--fatal-warnings -x c - -o /dev/null >/dev/null 2>&1 #include <stdio.h> int main(void) {