freebsd-skq/sys/conf/kern.opts.mk
imp 430d8603fc Add a note of clarification. MK_* variables only control what modules
are built by default. You can still override that with MODULES_EXTRA
for experimental features like ZFS and dtrace on some
architectures. Also note that kernel config files are not affected by
MK_ options listed, though some targets might be.
2015-03-27 17:36:22 +00:00

148 lines
3.7 KiB
Makefile

# $FreeBSD$
# Options set in the build system that affect the kernel somehow.
#
# Define MK_* variables (which are either "yes" or "no") for users
# to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the
# make(1) environment.
# These should be tested with `== "no"' or `!= "no"' in makefiles.
# The NO_* variables should only be set by makefiles for variables
# that haven't been converted over.
#
# Note: bsd.own.mk must be included before the rest of kern.opts.mk to make
# building on 10.x and earlier work. This should be removed when that's no
# longer supported since it confounds the defaults (since it uses the host's
# notion of defaults rather than what's default in current when building
# within sys/modules).
.include <bsd.own.mk>
# These options are used by the kernel build process (kern.mk and kmod.mk)
# They have to be listed here so we can build modules outside of the
# src tree.
__DEFAULT_YES_OPTIONS = \
AUTOFS \
BHYVE \
BLUETOOTH \
CCD \
CDDL \
CRYPT \
CUSE \
FORMAT_EXTENSIONS \
INET \
INET6 \
IPFILTER \
ISCSI \
KERNEL_SYMBOLS \
NETGRAPH \
PF \
SOURCELESS_HOST \
SOURCELESS_UCODE \
USB_GADGET_EXAMPLES \
ZFS
__DEFAULT_NO_OPTIONS = \
EISA \
NAND \
OFED
# Some options are totally broken on some architectures. We disable
# them. If you need to enable them on an experimental basis, you
# must change this code.
# Note: These only apply to the list of modules we build by default
# and sometimes what is in the opt_*.h files by default.
# Kernel config files are unaffected, though some targets can be
# affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
# Things that don't work based on the CPU
.if ${MACHINE_CPUARCH} == "arm"
BROKEN_OPTIONS+= CDDL ZFS
.endif
.if ${MACHINE_CPUARCH} == "mips"
BROKEN_OPTIONS+= CDDL ZFS
.endif
.if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
BROKEN_OPTIONS+= ZFS
.endif
# Things that don't work because the kernel doesn't have the support
# for them.
.if ${MACHINE} != "i386"
BROKEN_OPTIONS+= EISA
.endif
.if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
BROKEN_OPTIONS+= OFED
.endif
# expanded inline from bsd.mkopt.mk to avoid share/mk dependency
# Those that default to yes
.for var in ${__DEFAULT_YES_OPTIONS}
.if !defined(MK_${var})
.if defined(WITHOUT_${var}) # WITHOUT always wins
MK_${var}:= no
.else
MK_${var}:= yes
.endif
.else
.if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
.error "Illegal value for MK_${var}: ${MK_${var}}"
.endif
.endif # !defined(MK_${var})
.endfor
.undef __DEFAULT_YES_OPTIONS
# Those that default to no
.for var in ${__DEFAULT_NO_OPTIONS}
.if !defined(MK_${var})
.if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
MK_${var}:= yes
.else
MK_${var}:= no
.endif
.else
.if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
.error "Illegal value for MK_${var}: ${MK_${var}}"
.endif
.endif # !defined(MK_${var})
.endfor
.undef __DEFAULT_NO_OPTIONS
#
# MK_* options which are always no, usually because they are
# unsupported/badly broken on this architecture.
#
.for var in ${BROKEN_OPTIONS}
MK_${var}:= no
.endfor
.undef BROKEN_OPTIONS
#end of bsd.mkopt.mk expanded inline.
#
# MK_*_SUPPORT options which default to "yes" unless their corresponding
# MK_* variable is set to "no".
#
.for var in \
INET \
INET6
.if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
MK_${var}_SUPPORT:= no
.else
.if defined(KERNBUILDDIR) # See if there's an opt_foo.h
OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
.if ${OPT_${var}} == "" # nothing -> no
MK_${var}_SUPPORT:= no
.else
MK_${var}_SUPPORT:= yes
.endif
.else # otherwise, yes
MK_${var}_SUPPORT:= yes
.endif
.endif
.endfor