[PATCH 11/23] kbuild: check the presence of include/generated/rustc_cfg

[Masahiro Yamada]

Since commit 2f7ab1267dc9 ("Kbuild: add Rust support"), Kconfig
generates include/generated/rustc_cfg, but its presence is not checked
in the top-level Makefile. It should be checked similarly to the C
header counterpart, include/generated/autoconf.h.

Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
---

 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 3f5c273c2901..5700d08c9b57 100644
--- a/Makefile
+++ b/Makefile
@@ -780,7 +780,7 @@ else # !may-sync-config
 # and include/config/auto.conf but do not care if they are up-to-date.
 # Use auto.conf to show the error message
 
-checked-configs := include/generated/autoconf.h include/config/auto.conf
+checked-configs := include/generated/autoconf.h include/generated/rustc_cfg include/config/auto.conf
 missing-configs := $(filter-out $(wildcard $(checked-configs)), $(checked-configs))
 
 ifdef missing-configs
@@ -1187,7 +1187,8 @@ PHONY += prepare archprepare
 
 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
 	asm-generic $(version_h) include/generated/utsrelease.h \
-	include/generated/compile.h include/generated/autoconf.h remove-stale-files
+	include/generated/compile.h include/generated/autoconf.h \
+	include/generated/rustc_cfg remove-stale-files
 
 prepare0: archprepare
 	$(Q)$(MAKE) $(build)=scripts/mod
-- 
2.43.0