The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/conf/kern.opts.mk

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    1 # $FreeBSD: stable/11/sys/conf/kern.opts.mk 319171 2017-05-30 03:02:07Z ngie $
    2 
    3 # Options set in the build system that affect the kernel somehow.
    4 
    5 #
    6 # Define MK_* variables (which are either "yes" or "no") for users
    7 # to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the
    8 # make(1) environment.
    9 # These should be tested with `== "no"' or `!= "no"' in makefiles.
   10 # The NO_* variables should only be set by makefiles for variables
   11 # that haven't been converted over.
   12 #
   13 
   14 # Note: bsd.own.mk must be included before the rest of kern.opts.mk to make
   15 # building on 10.x and earlier work. This should be removed when that's no
   16 # longer supported since it confounds the defaults (since it uses the host's
   17 # notion of defaults rather than what's default in current when building
   18 # within sys/modules).
   19 .include <bsd.own.mk>
   20 
   21 # These options are used by the kernel build process (kern.mk and kmod.mk)
   22 # They have to be listed here so we can build modules outside of the
   23 # src tree.
   24 
   25 __DEFAULT_YES_OPTIONS = \
   26     AUTOFS \
   27     BHYVE \
   28     BLUETOOTH \
   29     CCD \
   30     CDDL \
   31     CRYPT \
   32     CUSE \
   33     FORMAT_EXTENSIONS \
   34     INET \
   35     INET6 \
   36     IPFILTER \
   37     IPSEC_SUPPORT \
   38     ISCSI \
   39     KERNEL_SYMBOLS \
   40     NETGRAPH \
   41     PF \
   42     SOURCELESS_HOST \
   43     SOURCELESS_UCODE \
   44     TESTS \
   45     USB_GADGET_EXAMPLES \
   46     ZFS
   47 
   48 __DEFAULT_NO_OPTIONS = \
   49     EISA \
   50     EXTRA_TCP_STACKS \
   51     NAND \
   52     OFED \
   53     REPRODUCIBLE_BUILD
   54 
   55 # Some options are totally broken on some architectures. We disable
   56 # them. If you need to enable them on an experimental basis, you
   57 # must change this code.
   58 # Note: These only apply to the list of modules we build by default
   59 # and sometimes what is in the opt_*.h files by default.
   60 # Kernel config files are unaffected, though some targets can be
   61 # affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
   62 
   63 # Things that don't work based on the CPU
   64 .if ${MACHINE_CPUARCH} == "arm"
   65 . if ${MACHINE_ARCH:Marmv6*} == ""
   66 BROKEN_OPTIONS+= CDDL ZFS
   67 . endif
   68 .endif
   69 
   70 .if ${MACHINE_CPUARCH} == "mips"
   71 BROKEN_OPTIONS+= CDDL ZFS
   72 .endif
   73 
   74 .if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
   75 BROKEN_OPTIONS+= ZFS
   76 .endif
   77 
   78 # Things that don't work because the kernel doesn't have the support
   79 # for them.
   80 .if ${MACHINE} != "i386"
   81 BROKEN_OPTIONS+= EISA
   82 .endif
   83 
   84 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
   85 BROKEN_OPTIONS+= OFED
   86 .endif
   87 
   88 # expanded inline from bsd.mkopt.mk to avoid share/mk dependency
   89 
   90 # Those that default to yes
   91 .for var in ${__DEFAULT_YES_OPTIONS}
   92 .if !defined(MK_${var})
   93 .if defined(WITHOUT_${var})                     # WITHOUT always wins
   94 MK_${var}:=     no
   95 .else
   96 MK_${var}:=     yes
   97 .endif
   98 .else
   99 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
  100 .error "Illegal value for MK_${var}: ${MK_${var}}"
  101 .endif
  102 .endif # !defined(MK_${var})
  103 .endfor
  104 .undef __DEFAULT_YES_OPTIONS
  105 
  106 # Those that default to no
  107 .for var in ${__DEFAULT_NO_OPTIONS}
  108 .if !defined(MK_${var})
  109 .if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
  110 MK_${var}:=     yes
  111 .else
  112 MK_${var}:=     no
  113 .endif
  114 .else
  115 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
  116 .error "Illegal value for MK_${var}: ${MK_${var}}"
  117 .endif
  118 .endif # !defined(MK_${var})
  119 .endfor
  120 .undef __DEFAULT_NO_OPTIONS
  121 
  122 #
  123 # MK_* options which are always no, usually because they are
  124 # unsupported/badly broken on this architecture.
  125 #
  126 .for var in ${BROKEN_OPTIONS}
  127 MK_${var}:=     no
  128 .endfor
  129 .undef BROKEN_OPTIONS
  130 #end of bsd.mkopt.mk expanded inline.
  131 
  132 #
  133 # MK_*_SUPPORT options which default to "yes" unless their corresponding
  134 # MK_* variable is set to "no".
  135 #
  136 .for var in \
  137     INET \
  138     INET6
  139 .if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
  140 MK_${var}_SUPPORT:= no
  141 .else
  142 .if defined(KERNBUILDDIR)       # See if there's an opt_foo.h
  143 .if !defined(OPT_${var})
  144 OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
  145 .export OPT_${var}
  146 .endif
  147 .if ${OPT_${var}} == ""         # nothing -> no
  148 MK_${var}_SUPPORT:= no
  149 .else
  150 MK_${var}_SUPPORT:= yes
  151 .endif
  152 .else                           # otherwise, yes
  153 MK_${var}_SUPPORT:= yes
  154 .endif
  155 .endif
  156 .endfor
  157 
  158 # Some modules only compile successfully if option FDT is set, due to #ifdef FDT
  159 # wrapped around declarations.  Module makefiles can optionally compile such
  160 # things using .if !empty(OPT_FDT)
  161 .if !defined(OPT_FDT) && defined(KERNBUILDDIR)
  162 OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h
  163 .export OPT_FDT
  164 .endif

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