kbuild: remove ARCH_{CPP,A,C}FLAGS
These flags were added by commit 61754c18752f ("kbuild: Allow arch
Makefiles to override {cpp,ld,c}flags") to allow ARC to override -O2.
We did not see any other usage after all. Now that ARC switched to
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3, there is no more user of
these variables.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/Makefile b/Makefile
index c27bc98a..db5706c 100644
--- a/Makefile
+++ b/Makefile
@@ -668,11 +668,6 @@
export RETPOLINE_CFLAGS
export RETPOLINE_VDSO_CFLAGS
-# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
-# values of the respective KBUILD_* variables
-ARCH_CPPFLAGS :=
-ARCH_AFLAGS :=
-ARCH_CFLAGS :=
include arch/$(SRCARCH)/Makefile
ifdef need-config
@@ -927,11 +922,10 @@
include scripts/Makefile.extrawarn
include scripts/Makefile.ubsan
-# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
-# last assignments
-KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
-KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
-KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
+# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
+KBUILD_CPPFLAGS += $(KCPPFLAGS)
+KBUILD_AFLAGS += $(KAFLAGS)
+KBUILD_CFLAGS += $(KCFLAGS)
KBUILD_LDFLAGS_MODULE += --build-id
LDFLAGS_vmlinux += --build-id