4.14-stable review patch. If anyone has any objections, please let me know.
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From: Nick Desaulniers nick.desaulniers@gmail.com
commit df16aaac26e92e97ab7234d3f93c953466adc4b5 upstream.
When compiling with `make CC=clang HOSTCC=clang`, I was seeing warnings that clang did not recognize -fno-delete-null-pointer-checks for HOSTCC targets. These were added in commit 61163efae020 ("kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang").
Clang does not support -fno-delete-null-pointer-checks, so adding it to HOSTCFLAGS if HOSTCC is clang does not make sense.
It's not clear why the other warnings were disabled, and just for HOSTCFLAGS, but I can remove them, add -Werror to HOSTCFLAGS and compile with clang just fine.
Suggested-by: Masahiro Yamada yamada.masahiro@socionext.com Signed-off-by: Nick Desaulniers nick.desaulniers@gmail.com Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com Cc: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- Makefile | 5 ----- 1 file changed, 5 deletions(-)
--- a/Makefile +++ b/Makefile @@ -369,11 +369,6 @@ HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) HOST_LOADLIBES := $(HOST_LFS_LIBS)
-ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) -HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ - -Wno-missing-field-initializers -fno-delete-null-pointer-checks -endif - # Make variables (CC, etc...) AS = $(CROSS_COMPILE)as LD = $(CROSS_COMPILE)ld