diff options
| author | Behan Webster <behanw@converseincode.com> | 2014-09-15 17:10:34 -0700 |
|---|---|---|
| committer | Behan Webster <behanw@converseincode.com> | 2015-01-18 18:05:13 -0800 |
| commit | 3d726e6b2cbc25050b1ac269bd37643733660614 (patch) | |
| tree | 4630d324d748d3a7373bb2ecbfa316a22a5cc623 /Makefile | |
| parent | da6eac19c706d1408c3f3f05cd4f55eea47b2c59 (diff) | |
kbuild, LLVMLinux: Add more compiler options for clang
Change default compiler options when using clang
Signed-off-by: Behan Webster <behanw@converseincode.com>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -302,7 +302,7 @@ 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 + -Wno-missing-field-initializers endif # Decide whether to build built-in, modular, or both. @@ -625,8 +625,6 @@ all: vmlinux include $(srctree)/arch/$(SRCARCH)/Makefile -KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) - ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) else @@ -689,19 +687,24 @@ KBUILD_CFLAGS += $(stackp-flag) ifeq ($(COMPILER),clang) KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) -KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) KBUILD_CFLAGS += $(call cc-disable-warning, gnu) +KBUILD_CFLAGS += -Wno-asm-operand-widths +KBUILD_CFLAGS += -Wno-initializer-overrides +KBUILD_CFLAGS += -fno-builtin + # Quiet clang warning: comparison of unsigned expression < 0 is always false KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) + # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the # source of a reference will be _MergedGlobals and not on of the whitelisted names. # See modpost pattern 2 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) -KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) + else +KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) # This warning generated too much noise in a regular build. # Use make W=1 to enable this warning (see scripts/Makefile.build) KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) |