Move definition of HOSTCC to allow use of cc-name.
Suppress warnings about unsupported optimization options.
Disable clang's integrated assembler which is incompatible with kernel
asm constructs.
Changes from v1:
* Move the $(cc-name) conditional below the definition of $(CC)
Changes from v2:
* Actually commit the changes in v2.
Signed-off-by: Peter Foley <pefol...@pefoley.com>
---
Makefile | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/Makefile b/Makefile
index 0ede48ba5aaf..94402cef6622 100644
--- a/Makefile
+++ b/Makefile
@@ -299,16 +299,6 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo
$$BASH; \
else if [ -x /bin/bash ]; then echo /bin/bash; \
else echo sh; fi ; fi)
-HOSTCC = gcc
-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
-endif
-
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
@@ -373,6 +363,15 @@ LDFLAGS_vmlinux =
CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
-Wno-maybe-uninitialized
CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
+HOSTCC = gcc
+HOSTCXX = g++
+HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2
-fomit-frame-pointer -std=gnu89 \
+ -Wno-unused-value -Wno-unused-parameter
-Wno-missing-field-initializers
+HOSTCXXFLAGS = -O2
+
+ifneq ($(cc-name),clang)
+HOSTCFLAGS += -fno-delete-null-pointer-checks
+endif
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := \
@@ -685,6 +684,7 @@ KBUILD_CFLAGS += $(stackp-flag)
ifeq ($(cc-name),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
+KBUILD_CFLAGS += $(call cc-disable-warning, ignored-optimization-argument)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
@@ -695,6 +695,8 @@ KBUILD_CFLAGS += $(call cc-disable-warning,
tautological-compare)
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
+KBUILD_CFLAGS += $(call cc-option, -fno-integrated-as)
+KBUILD_AFLAGS += $(call cc-option, -fno-integrated-as)
else
# These warnings generated too much noise in a regular build.
--
2.11.0.rc2
