124 lines
3.3 KiB
Makefile
124 lines
3.3 KiB
Makefile
#
|
|
# Derived from FreeBSD src/sys/conf/kern.mk
|
|
#
|
|
#
|
|
# Warning flags for compiling the kernel and components of the kernel:
|
|
#
|
|
|
|
CWARNFLAGS?= -Wall -Wnested-externs -Wstrict-prototypes \
|
|
-Wmissing-prototypes -Wpointer-arith -Wno-inline -Wcast-qual \
|
|
-Wno-pointer-sign -Wmissing-include-dirs -fdiagnostics-show-option \
|
|
${CWARNEXTRA}
|
|
#
|
|
# The following flags are next up for working on:
|
|
# -Wextra
|
|
|
|
# Disable a few warnings for clang, since there are several places in the
|
|
# kernel where fixing them is more trouble than it is worth, or where there is
|
|
# a false positive.
|
|
ifeq (${COMPILER_TYPE},clang)
|
|
NO_WCONSTANT_CONVERSION= -Wno-constant-conversion
|
|
NO_WARRAY_BOUNDS= -Wno-array-bounds
|
|
NO_WSHIFT_COUNT_NEGATIVE= -Wno-shift-count-negative
|
|
NO_WSHIFT_COUNT_OVERFLOW= -Wno-shift-count-overflow
|
|
NO_WUNUSED_VALUE= -Wno-unused-value
|
|
NO_WSELF_ASSIGN= -Wno-self-assign
|
|
NO_WFORMAT_SECURITY= -Wno-format-security
|
|
NO_WUNNEEDED_INTERNAL_DECL= -Wno-unneeded-internal-declaration
|
|
NO_WSOMETIMES_UNINITIALIZED= -Wno-error-sometimes-uninitialized
|
|
# Several other warnings which might be useful in some cases, but not severe
|
|
# enough to error out the whole kernel build. Display them anyway, so there is
|
|
# some incentive to fix them eventually.
|
|
CWARNEXTRA?= -Wno-error-tautological-compare -Wno-error-empty-body \
|
|
-Wno-error-parentheses-equality -Wno-incompatible-library-redeclaration \
|
|
-Wno-builtin-requires-header -Wno-error-shift-negative-value -Wno-unknown-warning-option
|
|
endif
|
|
|
|
ifeq (${COMPILER_TYPE},gcc)
|
|
CWARNEXTRA?= -Wno-unused-but-set-variable
|
|
endif
|
|
|
|
#
|
|
# On i386, do not align the stack to 16-byte boundaries. Otherwise GCC 2.95
|
|
# and above adds code to the entry and exit point of every function to align the
|
|
# stack to 16-byte boundaries -- thus wasting approximately 12 bytes of stack
|
|
# per function call. While the 16-byte alignment may benefit micro benchmarks,
|
|
# it is probably an overall loss as it makes the code bigger (less efficient
|
|
# use of code cache tag lines) and uses more stack (less efficient use of data
|
|
# cache tag lines).
|
|
#
|
|
ifeq (${MACHINE_CPUARCH},i386)
|
|
ifneq (${COMPILER_TYPE},clang)
|
|
CFLAGS+= -mno-align-long-strings -mpreferred-stack-boundary=2
|
|
else
|
|
CFLAGS+=
|
|
endif
|
|
CFLAGS+=
|
|
INLINE_LIMIT?= 8000
|
|
endif
|
|
|
|
ifeq (${MACHINE_CPUARCH},arm)
|
|
INLINE_LIMIT?= 8000
|
|
endif
|
|
|
|
#
|
|
# For IA-64, we use r13 for the kernel globals pointer and we only use
|
|
# a very small subset of float registers for integer divides.
|
|
#
|
|
ifeq (${MACHINE_CPUARCH},ia64)
|
|
CFLAGS+= -ffixed-r13 -mfixed-range=f32-f127 -fpic #-mno-sdata
|
|
INLINE_LIMIT?= 15000
|
|
endif
|
|
|
|
#
|
|
# For sparc64 we want the medany code model so modules may be located
|
|
# anywhere in the 64-bit address space.
|
|
#
|
|
ifeq (${MACHINE_CPUARCH},sparc64)
|
|
CFLAGS+= -mcmodel=medany
|
|
INLINE_LIMIT?= 15000
|
|
endif
|
|
|
|
ifeq (${MACHINE_CPUARCH},amd64)
|
|
ifeq (${COMPILER_TYPE},clang)
|
|
CFLAGS+=
|
|
endif
|
|
CFLAGS+=
|
|
INLINE_LIMIT?= 8000
|
|
endif
|
|
|
|
ifeq (${MACHINE_CPUARCH},powerpc)
|
|
CFLAGS+=
|
|
INLINE_LIMIT?= 15000
|
|
endif
|
|
|
|
ifeq (${MACHINE_ARCH},powerpc64)
|
|
CFLAGS+=
|
|
endif
|
|
|
|
ifeq (${MACHINE_CPUARCH},mips)
|
|
CFLAGS+=
|
|
INLINE_LIMIT?= 8000
|
|
endif
|
|
|
|
ifeq (${MACHINE_CPUARCH},arm64)
|
|
INLINE_LIMIT?= 15000
|
|
endif
|
|
|
|
#
|
|
# GCC SSP support
|
|
#
|
|
ifneq (${MK_SSP},no)
|
|
ifneq (${MACHINE_CPUARCH},ia64)
|
|
ifneq (${MACHINE_CPUARCH},arm)
|
|
ifneq (${MACHINE_CPUARCH},mips)
|
|
CFLAGS+= -fstack-protector
|
|
endif
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
|
|
${IMACROS_FILE}: ${TOPDIR}/mk/kern.pre.mk
|
|
echo | ${CC} -E -dM - | grep -v -E '${IMACROS_FILTER_EXPR}' > ${IMACROS_FILE}
|