sys/conf/bsd.kern.mk

   1 # $FreeBSD: src/share/mk/bsd.kern.mk,v 1.17.2.1 2001/08/01 16:56:56 obrien Exp $
   2
   3 # Warning flags for compiling the kernel and components of the kernel.
   4 #
   5 # Note that -Werror is on by default. To turn it off, e.g. when working
   6 # on adding new warning options, NO_WERROR in make.conf (or on make(1)'s
   7 # command line) should be of material assistance.
   8 #
   9
  10 CWARNFLAGS?=    -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
  11                 -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual \
  12                 -Wold-style-definition -Wmissing-include-dirs -Wno-inline \
  13                 -Wno-pointer-sign -Winit-self -std=c99
  14
  15 .if ${CCVER:Mgcc*}
  16 # All flags inside this block are gcc-specific except for --param
  17 # Since inline-limit wasn't recognized, and since --param squawks on clang
  18 # when it isn't used, it was shift to GCC compilers only.
  19 CFLAGS+=        -Wold-style-declaration \
  20                 -finline-limit=${INLINE_LIMIT} \
  21                 --param inline-unit-growth=100 \
  22                 --param large-function-growth=1000
  23 .if ${CCVER:Mgcc4[789]} || ${CCVER:Mgcc[5-]*}
  24 CWARNFLAGS+=    -Wno-unused-but-set-variable
  25 .endif
  26 # XXX drm/i915 is too noisy for gcc80, keep till i915 update
  27 .if ${CCVER:Mgcc80}
  28 CWARNFLAGS+=    -Wno-error=unused-const-variable
  29 .endif
  30 .endif
  31
  32
  33 # Require the proper use of 'extern' for variables.  -fno-common will
  34 # cause duplicate declarations to generate a link error.
  35 #
  36 CFLAGS+=        -fno-common
  37
  38 # Prevent GCC 3.x from making certain libc based inline optimizations
  39 #
  40 CFLAGS+=        -ffreestanding
  41
  42 .include "../platform/${MACHINE_PLATFORM}/conf/kern.mk"