[PATCH RFC next 13/18] kbuild: rust: move `-Dwarnings` handling to `Makefile.extrawarn`

[Quentin Schulz]

From: Quentin Schulz <quentin.schulz at cherry.de>

[ Upstream commit 592b571f20c5b905c47a1370210456f9f90ce04f ]

Original commit log:

  Following commit e88ca24319e4 ("kbuild: consolidate warning flags
  in scripts/Makefile.extrawarn"), move `-Dwarnings` handling into
  `Makefile.extrawarn` like C's `-Werror`.

  No functional change intended.

[git conflict trying to remove KBUILD_RUSTFLAGS from Makefile, which we
 don't have in U-Boot]
[U-Boot doesn't build anything Rust so this is useless except for the
 fact it allows to backport patches from Linux kernel easier]
Signed-off-by: Quentin Schulz <quentin.schulz at cherry.de>
---
 scripts/Makefile.extrawarn | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index b5b1a762cdc..2af90af594e 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -104,5 +104,6 @@ endif
 ifneq ($(findstring e, $(KBUILD_EXTRA_WARN))$(CONFIG_WERROR),)
 
 KBUILD_CPPFLAGS		+= -Werror
+KBUILD_RUSTFLAGS	+= -Dwarnings
 
 endif

-- 
2.54.0