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Add a note of clarification. MK_* variables only control what modules

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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.
This commit is contained in:
Warner Losh 2015-03-27 17:36:22 +00:00
parent a06c511716
commit cd9142c718
1 changed files with 4 additions and 38 deletions
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42
sys/conf/kern.opts.mk
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@ -51,6 +51,10 @@ __DEFAULT_NO_OPTIONS = \
# 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"
@ -75,34 +79,6 @@ BROKEN_OPTIONS+= EISA
BROKEN_OPTIONS+= OFED
.endif
# Options that cannot be turned on this architecture, usually because
# of compilation or other issues so severe it cannot be used even
# on an experimental basis
__ALWAYS_NO_OPTIONS=
# Things that don't work based on the CPU
.if ${MACHINE_CPUARCH} == "arm"
__ALWAYS_NO_OPTIONS+= CDDL ZFS
.endif
.if ${MACHINE_CPUARCH} == "mips"
__ALWAYS_NO_OPTIONS+= CDDL ZFS
.endif
.if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} != "powerpc64"
__ALWAYS_NO_OPTIONS+= ZFS
.endif
# Things that don't work because the kernel doesn't have the support
# for them.
.if ${MACHINE} != "i386"
__ALWAYS_NO_OPTIONS+= EISA
.endif
.if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
__ALWAYS_NO_OPTIONS+= OFED
.endif
# expanded inline from bsd.mkopt.mk to avoid share/mk dependency
# Those that default to yes
@ -147,16 +123,6 @@ MK_${var}:= no
.undef BROKEN_OPTIONS
#end of bsd.mkopt.mk expanded inline.
#
# MK_* options which are always no, usually because they are
# unsupported/badly broken on this architecture.
#
.for var in ${__ALWAYS_NO_OPTIONS}
MK_${var}:= no
.endfor
.undef __ALWAYS_NO_OPTIONS
#end of bsd.mkopt.mk expanded inline.
#
# MK_*_SUPPORT options which default to "yes" unless their corresponding
# MK_* variable is set to "no".