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 SPLIT_KERNEL_DEBUG \ 53 TESTS \ 54 USB_GADGET_EXAMPLES \ 55 ZFS 56 57__DEFAULT_NO_OPTIONS = \ 58 BHYVE_SNAPSHOT \ 59 EXTRA_TCP_STACKS \ 60 INIT_ALL_PATTERN \ 61 INIT_ALL_ZERO \ 62 KERNEL_RETPOLINE \ 63 RATELIMIT \ 64 REPRODUCIBLE_BUILD 65 66# Some options are totally broken on some architectures. We disable 67# them. If you need to enable them on an experimental basis, you 68# must change this code. 69# Note: These only apply to the list of modules we build by default 70# and sometimes what is in the opt_*.h files by default. 71# Kernel config files are unaffected, though some targets can be 72# affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP. 73 74# Things that don't work based on the CPU 75.if ${MACHINE} == "amd64" 76# PR251083 conflict between INIT_ALL_ZERO and ifunc memset 77BROKEN_OPTIONS+= INIT_ALL_ZERO 78.endif 79 80.if ${MACHINE_CPUARCH} == "arm" 81. if ${MACHINE_ARCH:Marmv[67]*} == "" 82BROKEN_OPTIONS+= CDDL ZFS 83. endif 84.endif 85 86.if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc" 87BROKEN_OPTIONS+= ZFS 88.endif 89 90# Things that don't work because the kernel doesn't have the support 91# for them. 92.if ${MACHINE} != "i386" && ${MACHINE} != "amd64" 93BROKEN_OPTIONS+= OFED 94.endif 95 96# Things that don't work based on toolchain support. 97.if ${MACHINE} != "i386" && ${MACHINE} != "amd64" 98BROKEN_OPTIONS+= KERNEL_RETPOLINE 99.endif 100 101# EFI doesn't exist on powerpc, or riscv 102.if ${MACHINE:Mpowerpc} || ${MACHINE:Mriscv} 103BROKEN_OPTIONS+=EFI 104.endif 105 106.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64" 107__DEFAULT_NO_OPTIONS += FDT 108.else 109__DEFAULT_YES_OPTIONS += FDT 110.endif 111 112# expanded inline from bsd.mkopt.mk to avoid share/mk dependency 113 114# Those that default to yes 115.for var in ${__DEFAULT_YES_OPTIONS} 116.if !defined(MK_${var}) 117.if defined(WITHOUT_${var}) # WITHOUT always wins 118MK_${var}:= no 119.else 120MK_${var}:= yes 121.endif 122.else 123.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 124.error "Illegal value for MK_${var}: ${MK_${var}}" 125.endif 126.endif # !defined(MK_${var}) 127.endfor 128.undef __DEFAULT_YES_OPTIONS 129 130# Those that default to no 131.for var in ${__DEFAULT_NO_OPTIONS} 132.if !defined(MK_${var}) 133.if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins 134MK_${var}:= yes 135.else 136MK_${var}:= no 137.endif 138.else 139.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 140.error "Illegal value for MK_${var}: ${MK_${var}}" 141.endif 142.endif # !defined(MK_${var}) 143.endfor 144.undef __DEFAULT_NO_OPTIONS 145 146# 147# MK_* options which are always no, usually because they are 148# unsupported/badly broken on this architecture. 149# 150.for var in ${BROKEN_OPTIONS} 151MK_${var}:= no 152.endfor 153.undef BROKEN_OPTIONS 154#end of bsd.mkopt.mk expanded inline. 155 156# 157# MK_*_SUPPORT options which default to "yes" unless their corresponding 158# MK_* variable is set to "no". 159# 160.for var in \ 161 INET \ 162 INET6 163.if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no" 164MK_${var}_SUPPORT:= no 165.else 166.if defined(KERNBUILDDIR) # See if there's an opt_foo.h 167.if !defined(OPT_${var}) 168OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo 169.export OPT_${var} 170.endif 171.if ${OPT_${var}} == "" # nothing -> no 172MK_${var}_SUPPORT:= no 173.else 174MK_${var}_SUPPORT:= yes 175.endif 176.else # otherwise, yes 177MK_${var}_SUPPORT:= yes 178.endif 179.endif 180.endfor 181 182.if ${MK_SPLIT_KERNEL_DEBUG} == "no" 183MK_KERNEL_SYMBOLS:= no 184.endif 185 186# Some modules only compile successfully if option FDT is set, due to #ifdef FDT 187# wrapped around declarations. Module makefiles can optionally compile such 188# things using .if !empty(OPT_FDT) 189.if !defined(OPT_FDT) && defined(KERNBUILDDIR) 190OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h 191.export OPT_FDT 192.if empty(OPT_FDT) 193MK_FDT:=no 194.else 195MK_FDT:=yes 196.endif 197.endif 198