kbuild: respect CONFIG_WERROR for userprogs

The userprogs compiler and linker do not share the regular compiler flags.

Make sure they also fail on warnings with CONFIG_WERROR and W=e.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Link: https://lore.kernel.org/r/20250814-kbuild-werror-v2-5-c01e596309d2@linutronix.de
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 6efb9e5eeeed0696a061a17e029a92caba50826f..96ff3f5582d651f0016c8ccd49d46022cc6fe070 100644 (file)
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -219,6 +219,8 @@ ifneq ($(findstring e, $(KBUILD_EXTRA_WARN))$(CONFIG_WERROR),)
 KBUILD_CPPFLAGS                += -Werror
 KBUILD_AFLAGS          += -Wa,--fatal-warnings
 KBUILD_LDFLAGS         += --fatal-warnings
+KBUILD_USERCFLAGS      += -Werror
+KBUILD_USERLDFLAGS     += -Wl,--fatal-warnings
 KBUILD_RUSTFLAGS       += -Dwarnings
 
 endif