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