3 # Options set in the build system that affect the kernel somehow.
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
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.
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).
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
25 __DEFAULT_YES_OPTIONS = \
49 __DEFAULT_NO_OPTIONS = \
57 # Some options are totally broken on some architectures. We disable
58 # them. If you need to enable them on an experimental basis, you
59 # must change this code.
60 # Note: These only apply to the list of modules we build by default
61 # and sometimes what is in the opt_*.h files by default.
62 # Kernel config files are unaffected, though some targets can be
63 # affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
65 # Things that don't work based on the CPU
66 .if ${MACHINE_CPUARCH} == "arm"
67 . if ${MACHINE_ARCH:Marmv[67]*} == ""
68 BROKEN_OPTIONS+= CDDL ZFS
72 .if ${MACHINE_CPUARCH} == "mips"
73 BROKEN_OPTIONS+= CDDL ZFS SSP
76 .if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
80 .if ${MACHINE_CPUARCH} == "riscv"
81 BROKEN_OPTIONS+= FORMAT_EXTENSIONS
84 # Things that don't work because the kernel doesn't have the support
86 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
90 # Things that don't work based on toolchain support.
91 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
92 BROKEN_OPTIONS+= KERNEL_RETPOLINE
95 # EFI doesn't exist on mips, powerpc, sparc or riscv.
96 .if ${MACHINE:Mmips} || ${MACHINE:Mpowerpc} || ${MACHINE:Msparc64} || ${MACHINE:Mriscv}
100 # expanded inline from bsd.mkopt.mk to avoid share/mk dependency
102 # Those that default to yes
103 .for var in ${__DEFAULT_YES_OPTIONS}
104 .if !defined(MK_${var})
105 .if defined(WITHOUT_${var}) # WITHOUT always wins
111 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
112 .error "Illegal value for MK_${var}: ${MK_${var}}"
114 .endif # !defined(MK_${var})
116 .undef __DEFAULT_YES_OPTIONS
118 # Those that default to no
119 .for var in ${__DEFAULT_NO_OPTIONS}
120 .if !defined(MK_${var})
121 .if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
127 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
128 .error "Illegal value for MK_${var}: ${MK_${var}}"
130 .endif # !defined(MK_${var})
132 .undef __DEFAULT_NO_OPTIONS
135 # MK_* options which are always no, usually because they are
136 # unsupported/badly broken on this architecture.
138 .for var in ${BROKEN_OPTIONS}
141 .undef BROKEN_OPTIONS
142 #end of bsd.mkopt.mk expanded inline.
145 # MK_*_SUPPORT options which default to "yes" unless their corresponding
146 # MK_* variable is set to "no".
151 .if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
152 MK_${var}_SUPPORT:= no
154 .if defined(KERNBUILDDIR) # See if there's an opt_foo.h
155 .if !defined(OPT_${var})
156 OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
159 .if ${OPT_${var}} == "" # nothing -> no
160 MK_${var}_SUPPORT:= no
162 MK_${var}_SUPPORT:= yes
164 .else # otherwise, yes
165 MK_${var}_SUPPORT:= yes
170 # Some modules only compile successfully if option FDT is set, due to #ifdef FDT
171 # wrapped around declarations. Module makefiles can optionally compile such
172 # things using .if !empty(OPT_FDT)
173 .if !defined(OPT_FDT) && defined(KERNBUILDDIR)
174 OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h