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um: clang: Strip out -mno-global-merge from USER_CFLAGS

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The things built with USER_CFLAGS don't seem to recognise it as a
compiler option, and print a warning:
clang: warning: argument unused during compilation: '-mno-global-merge' [-Wunused-command-line-argument]

Fixes: 744814d2fa ("um: Allow builds with Clang")
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
David Gow 2022-03-03 17:06:42 +08:00 committed by Richard Weinberger
parent 4ef5a0b2e1
commit 6580c5c18f
1 changed files with 4 additions and 0 deletions
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4
arch/um/Makefile
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@ -75,6 +75,10 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
ifdef CONFIG_CC_IS_CLANG
USER_CFLAGS := $(patsubst -mno-global-merge,,$(USER_CFLAGS))
endif
#This will adjust *FLAGS accordingly to the platform.
include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)