1# $FreeBSD: src/sys/conf/kern.mk,v 1.52 2007/05/24 21:53:42 obrien Exp $ 2 3# 4# Warning flags for compiling the kernel and components of the kernel. 5# 6# For x86_64, we explicitly prohibit the use of FPU, SSE and other SIMD 7# operations inside the kernel itself. These operations are exclusively 8# reserved for user applications. 9# 10# -fno-strict-aliasing required for -O2 compilation. 11# 12CFLAGS+= -fno-stack-protector -fno-strict-aliasing 13CFLAGS+= -fno-strict-overflow 14CFLAGS+= -mcmodel=kernel -mno-red-zone -mfpmath=387 15 16CFLAGS+= -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 17 18.if ${CCVER:Mgcc*} 19CFLAGS+= -mpreferred-stack-boundary=4 20CFLAGS+= -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -mno-sse4 -mno-sse4a \ 21 -mno-sse5 22CFLAGS+= -mno-abm -mno-aes -mno-avx -mno-pclmul -mno-popcnt 23 24.if ${CCVER:Mgcc4[789]} || ${CCVER:Mgcc5*} 25CFLAGS+= -mno-avx2 -mno-fsgsbase -mno-rdrnd -mno-f16c 26CFLAGS+= -mno-fma -mno-fma4 27CFLAGS+= -mno-bmi -mno-bmi2 28CFLAGS+= -mno-xop -mno-lwp -mno-lzcnt -mno-tbm 29.endif 30 31.if ${CCVER:Mgcc8*} 32CFLAGS+= -mindirect-branch=thunk-inline 33.endif 34.endif 35 36CFLAGS+= -msoft-float 37CFLAGS+= -fno-asynchronous-unwind-tables -fno-omit-frame-pointer 38 39INLINE_LIMIT?= 8000 40