1# $FreeBSD: src/sys/conf/kern.mk,v 1.52 2007/05/24 21:53:42 obrien Exp $ 2# $DragonFly: src/sys/platform/pc64/conf/kern.mk,v 1.2 2008/08/29 17:07:15 dillon Exp $ 3 4# 5# Warning flags for compiling the kernel and components of the kernel. 6# 7# For x86_64, we explicitly prohibit the use of FPU, SSE and other SIMD 8# operations inside the kernel itself. These operations are exclusively 9# reserved for user applications. 10# 11CFLAGS+= -mpreferred-stack-boundary=4 12CFLAGS+= -fno-stack-protector 13CFLAGS+= -mcmodel=kernel -mno-red-zone -mfpmath=387 14 15CFLAGS+= -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 16 17.if ${CCVER} == "gcc44" || ${CCVER} == "gcc47" 18CFLAGS+= -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -mno-sse4 -mno-sse4a \ 19 -mno-sse5 20CFLAGS+= -mno-abm -mno-aes -mno-avx -mno-pclmul -mno-popcnt 21.endif 22 23.if ${CCVER} == "gcc47" 24CFLAGS+= -mno-avx2 -mno-fsgsbase -mno-rdrnd -mno-f16c 25CFLAGS+= -mno-fma -mno-fma4 26CFLAGS+= -mno-bmi -mno-bmi2 27CFLAGS+= -mno-xop -mno-lwp -mno-lzcnt -mno-tbm 28.endif 29 30CFLAGS+= -msoft-float 31CFLAGS+= -fno-asynchronous-unwind-tables -fno-omit-frame-pointer 32 33INLINE_LIMIT?= 8000 34