script: build-rpi4: Update script to clarify build errors

[platform/kernel/linux-rpi.git] / scripts / Makefile.clang

diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang
index 4cce8fd..51fc23e 100644 (file)
--- a/scripts/Makefile.clang
+++ b/scripts/Makefile.clang
@@ -29,7 +29,12 @@ CLANG_FLAGS  += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
 else
 CLANG_FLAGS    += -fintegrated-as
 endif
+# By default, clang only warns when it encounters an unknown warning flag or
+# certain optimization flags it knows it has not implemented.
+# Make it behave more like gcc by erroring when these flags are encountered
+# so they can be implemented or wrapped in cc-option.
 CLANG_FLAGS    += -Werror=unknown-warning-option
+CLANG_FLAGS    += -Werror=ignored-optimization-argument
 KBUILD_CFLAGS  += $(CLANG_FLAGS)
 KBUILD_AFLAGS  += $(CLANG_FLAGS)
 export CLANG_FLAGS