sys/platform/pc64/conf/kern.mk

   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 #
  12 CFLAGS+=        -fno-stack-protector -fno-strict-aliasing
  13 CFLAGS+=        -fno-strict-overflow
  14 CFLAGS+=        -mcmodel=kernel -mno-red-zone -mfpmath=387
  15
  16 CFLAGS+=        -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3
  17
  18 .if ${CCVER:Mgcc*}
  19 CFLAGS+=        -mpreferred-stack-boundary=4
  20 CFLAGS+=        -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -mno-sse4 -mno-sse4a \
  21                 -mno-sse5
  22 CFLAGS+=        -mno-abm -mno-aes -mno-avx -mno-pclmul -mno-popcnt
  23
  24 .if ${CCVER:Mgcc4[789]} || ${CCVER:Mgcc5*}
  25 CFLAGS+=        -mno-avx2 -mno-fsgsbase -mno-rdrnd -mno-f16c
  26 CFLAGS+=        -mno-fma -mno-fma4
  27 CFLAGS+=        -mno-bmi -mno-bmi2
  28 CFLAGS+=        -mno-xop -mno-lwp -mno-lzcnt -mno-tbm
  29 .endif
  30 .endif
  31
  32 CFLAGS+=        -msoft-float
  33 CFLAGS+=        -fno-asynchronous-unwind-tables -fno-omit-frame-pointer
  34
  35 INLINE_LIMIT?=  8000