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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:ec4a3992bc("kbuild: respect CONFIG_WERROR for linker and assembler") Fixes:3f0ff4cc6f("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@linutronix.de Signed-off-by: Nicolas Schier <nsc@kernel.org>
12 lines
195 B
Bash
Executable File
12 lines
195 B
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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cat << "END" | $@ -Werror -Wl,--fatal-warnings -x c - -o /dev/null >/dev/null 2>&1
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#include <stdio.h>
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int main(void)
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{
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printf("");
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return 0;
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}
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END
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