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Date: Tue, 15 Sep 2015 05:03:00 +0200 From: Sedat Dilek <sedat.dilek@...il.com> To: Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Sedat Dilek <sedat.dilek@...il.com> Subject: [PATCH] kbuild: llvmlinux: Fix -fno-delete-null-pointer-checks compiler-flag CLANG (here: v3.7) does not support '-fno-delete-null-pointer-checks' as a compiler-flag. Fix the HOSTCFLAGS and KBUILD_CFLAGS settings accordingly. Furthermore, move and correct the $HOSTCC check. Tested against Linux v4.3-rc1 and a refreshed llvmlinux patchset. --- Makefile | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Makefile b/Makefile index aaf1d52bc646..4249441e535d 100644 --- a/Makefile +++ b/Makefile @@ -300,9 +300,9 @@ HOSTCXX = g++ HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 HOSTCXXFLAGS = -O2 -ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) -HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ - -Wno-missing-field-initializers -fno-delete-null-pointer-checks +HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter -Wno-missing-field-initializers +ifneq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) +HOSTCFLAGS += -fno-delete-null-pointer-checks endif # Decide whether to build built-in, modular, or both. @@ -617,7 +617,9 @@ ARCH_AFLAGS := ARCH_CFLAGS := include arch/$(SRCARCH)/Makefile +ifneq ($(cc-name),clang) KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) +endif ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) -- 2.5.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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