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
27 __DEFAULT_YES_OPTIONS = \
52 __DEFAULT_NO_OPTIONS = \
62 # Some options are totally broken on some architectures. We disable
63 # them. If you need to enable them on an experimental basis, you
64 # must change this code.
65 # Note: These only apply to the list of modules we build by default
66 # and sometimes what is in the opt_*.h files by default.
67 # Kernel config files are unaffected, though some targets can be
68 # affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
70 # Things that don't work based on the CPU
71 .if ${MACHINE} == "amd64"
72 # PR251083 conflict between INIT_ALL_ZERO and ifunc memset
73 BROKEN_OPTIONS+= INIT_ALL_ZERO
76 .if ${MACHINE_CPUARCH} == "arm"
77 . if ${MACHINE_ARCH:Marmv[67]*} == ""
78 BROKEN_OPTIONS+= CDDL ZFS
82 .if ${MACHINE_CPUARCH} == "mips"
83 BROKEN_OPTIONS+= CDDL ZFS SSP
86 .if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
90 # Things that don't work because the kernel doesn't have the support
92 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
96 # Things that don't work based on toolchain support.
97 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
98 BROKEN_OPTIONS+= KERNEL_RETPOLINE
101 # EFI doesn't exist on mips, powerpc, or riscv.
102 .if ${MACHINE:Mmips} || ${MACHINE:Mpowerpc} || ${MACHINE:Mriscv}
106 # expanded inline from bsd.mkopt.mk to avoid share/mk dependency
108 # Those that default to yes
109 .for var in ${__DEFAULT_YES_OPTIONS}
110 .if !defined(MK_${var})
111 .if defined(WITHOUT_${var}) # WITHOUT always wins
117 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
118 .error "Illegal value for MK_${var}: ${MK_${var}}"
120 .endif # !defined(MK_${var})
122 .undef __DEFAULT_YES_OPTIONS
124 # Those that default to no
125 .for var in ${__DEFAULT_NO_OPTIONS}
126 .if !defined(MK_${var})
127 .if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
133 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
134 .error "Illegal value for MK_${var}: ${MK_${var}}"
136 .endif # !defined(MK_${var})
138 .undef __DEFAULT_NO_OPTIONS
141 # MK_* options which are always no, usually because they are
142 # unsupported/badly broken on this architecture.
144 .for var in ${BROKEN_OPTIONS}
147 .undef BROKEN_OPTIONS
148 #end of bsd.mkopt.mk expanded inline.
151 # MK_*_SUPPORT options which default to "yes" unless their corresponding
152 # MK_* variable is set to "no".
157 .if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
158 MK_${var}_SUPPORT:= no
160 .if defined(KERNBUILDDIR) # See if there's an opt_foo.h
161 .if !defined(OPT_${var})
162 OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
165 .if ${OPT_${var}} == "" # nothing -> no
166 MK_${var}_SUPPORT:= no
168 MK_${var}_SUPPORT:= yes
170 .else # otherwise, yes
171 MK_${var}_SUPPORT:= yes
176 # Some modules only compile successfully if option FDT is set, due to #ifdef FDT
177 # wrapped around declarations. Module makefiles can optionally compile such
178 # things using .if !empty(OPT_FDT)
179 .if !defined(OPT_FDT) && defined(KERNBUILDDIR)
180 OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h