1# $FreeBSD$ 2 3# Options set in the build system which affect the building of kernel 4# modules. These select which parts to compile in or out (eg INET) or which 5# parts to omit (eg CDDL or SOURCELESS_HOST). Some of these will cause 6# config.mk to define symbols in various opt_*.h files. 7 8# 9# Define MK_* variables (which are either "yes" or "no") for users 10# to set via WITH_*/WITHOUT_* in /etc/src.conf and override in the 11# make(1) environment. 12# These should be tested with `== "no"' or `!= "no"' in makefiles. 13# The NO_* variables should only be set by makefiles for variables 14# that haven't been converted over. 15# 16 17# Note: bsd.own.mk must be included before the rest of kern.opts.mk to make 18# building on 10.x and earlier work. This should be removed when that's no 19# longer supported since it confounds the defaults (since it uses the host's 20# notion of defaults rather than what's default in current when building 21# within sys/modules). 22.include <bsd.own.mk> 23 24# These options are used by the kernel build process (kern.mk and kmod.mk) 25# They have to be listed here so we can build modules outside of the 26# src tree. 27 28KLDXREF_CMD?= kldxref 29 30__DEFAULT_YES_OPTIONS = \ 31 AUTOFS \ 32 BHYVE \ 33 BLUETOOTH \ 34 CCD \ 35 CDDL \ 36 CRYPT \ 37 CUSE \ 38 EFI \ 39 FORMAT_EXTENSIONS \ 40 INET \ 41 INET6 \ 42 IPFILTER \ 43 IPSEC_SUPPORT \ 44 ISCSI \ 45 KERNEL_SYMBOLS \ 46 NETGRAPH \ 47 OFED \ 48 PF \ 49 SCTP_SUPPORT \ 50 SOURCELESS_HOST \ 51 SOURCELESS_UCODE \ 52 TESTS \ 53 USB_GADGET_EXAMPLES \ 54 ZFS 55 56__DEFAULT_NO_OPTIONS = \ 57 BHYVE_SNAPSHOT \ 58 EXTRA_TCP_STACKS \ 59 INIT_ALL_PATTERN \ 60 INIT_ALL_ZERO \ 61 KERNEL_RETPOLINE \ 62 RATELIMIT \ 63 REPRODUCIBLE_BUILD 64 65# Some options are totally broken on some architectures. We disable 66# them. If you need to enable them on an experimental basis, you 67# must change this code. 68# Note: These only apply to the list of modules we build by default 69# and sometimes what is in the opt_*.h files by default. 70# Kernel config files are unaffected, though some targets can be 71# affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP. 72 73# Things that don't work based on the CPU 74.if ${MACHINE} == "amd64" 75# PR251083 conflict between INIT_ALL_ZERO and ifunc memset 76BROKEN_OPTIONS+= INIT_ALL_ZERO 77.endif 78 79.if ${MACHINE_CPUARCH} == "arm" 80. if ${MACHINE_ARCH:Marmv[67]*} == "" 81BROKEN_OPTIONS+= CDDL ZFS 82. endif 83.endif 84 85.if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc" 86BROKEN_OPTIONS+= ZFS 87.endif 88 89# Things that don't work because the kernel doesn't have the support 90# for them. 91.if ${MACHINE} != "i386" && ${MACHINE} != "amd64" 92BROKEN_OPTIONS+= OFED 93.endif 94 95# Things that don't work based on toolchain support. 96.if ${MACHINE} != "i386" && ${MACHINE} != "amd64" 97BROKEN_OPTIONS+= KERNEL_RETPOLINE 98.endif 99 100# EFI doesn't exist on powerpc, or riscv 101.if ${MACHINE:Mpowerpc} || ${MACHINE:Mriscv} 102BROKEN_OPTIONS+=EFI 103.endif 104 105.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64" 106__DEFAULT_NO_OPTIONS += FDT 107.else 108__DEFAULT_YES_OPTIONS += FDT 109.endif 110 111# expanded inline from bsd.mkopt.mk to avoid share/mk dependency 112 113# Those that default to yes 114.for var in ${__DEFAULT_YES_OPTIONS} 115.if !defined(MK_${var}) 116.if defined(WITHOUT_${var}) # WITHOUT always wins 117MK_${var}:= no 118.else 119MK_${var}:= yes 120.endif 121.else 122.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 123.error "Illegal value for MK_${var}: ${MK_${var}}" 124.endif 125.endif # !defined(MK_${var}) 126.endfor 127.undef __DEFAULT_YES_OPTIONS 128 129# Those that default to no 130.for var in ${__DEFAULT_NO_OPTIONS} 131.if !defined(MK_${var}) 132.if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins 133MK_${var}:= yes 134.else 135MK_${var}:= no 136.endif 137.else 138.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 139.error "Illegal value for MK_${var}: ${MK_${var}}" 140.endif 141.endif # !defined(MK_${var}) 142.endfor 143.undef __DEFAULT_NO_OPTIONS 144 145# 146# MK_* options which are always no, usually because they are 147# unsupported/badly broken on this architecture. 148# 149.for var in ${BROKEN_OPTIONS} 150MK_${var}:= no 151.endfor 152.undef BROKEN_OPTIONS 153#end of bsd.mkopt.mk expanded inline. 154 155# 156# MK_*_SUPPORT options which default to "yes" unless their corresponding 157# MK_* variable is set to "no". 158# 159.for var in \ 160 INET \ 161 INET6 162.if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no" 163MK_${var}_SUPPORT:= no 164.else 165.if defined(KERNBUILDDIR) # See if there's an opt_foo.h 166.if !defined(OPT_${var}) 167OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo 168.export OPT_${var} 169.endif 170.if ${OPT_${var}} == "" # nothing -> no 171MK_${var}_SUPPORT:= no 172.else 173MK_${var}_SUPPORT:= yes 174.endif 175.else # otherwise, yes 176MK_${var}_SUPPORT:= yes 177.endif 178.endif 179.endfor 180 181# Some modules only compile successfully if option FDT is set, due to #ifdef FDT 182# wrapped around declarations. Module makefiles can optionally compile such 183# things using .if !empty(OPT_FDT) 184.if !defined(OPT_FDT) && defined(KERNBUILDDIR) 185OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h 186.export OPT_FDT 187.if empty(OPT_FDT) 188MK_FDT:=no 189.else 190MK_FDT:=yes 191.endif 192.endif 193