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 DTRACE \ 39 EFI \ 40 FORMAT_EXTENSIONS \ 41 INET \ 42 INET6 \ 43 IPFILTER \ 44 IPSEC_SUPPORT \ 45 ISCSI \ 46 KERNEL_SYMBOLS \ 47 NETGRAPH \ 48 OFED \ 49 PF \ 50 SCTP_SUPPORT \ 51 SOURCELESS_HOST \ 52 SOURCELESS_UCODE \ 53 SPLIT_KERNEL_DEBUG \ 54 TESTS \ 55 USB_GADGET_EXAMPLES \ 56 ZFS 57 58__DEFAULT_NO_OPTIONS = \ 59 BHYVE_SNAPSHOT \ 60 EXTRA_TCP_STACKS \ 61 INIT_ALL_PATTERN \ 62 INIT_ALL_ZERO \ 63 KERNEL_RETPOLINE \ 64 RATELIMIT \ 65 REPRODUCIBLE_BUILD \ 66 VERIEXEC 67 68# Some options are totally broken on some architectures. We disable 69# them. If you need to enable them on an experimental basis, you 70# must change this code. 71# Note: These only apply to the list of modules we build by default 72# and sometimes what is in the opt_*.h files by default. 73# Kernel config files are unaffected, though some targets can be 74# affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP. 75 76# Things that don't work based on the CPU 77.if ${MACHINE} == "amd64" 78# PR251083 conflict between INIT_ALL_ZERO and ifunc memset 79BROKEN_OPTIONS+= INIT_ALL_ZERO 80.endif 81 82# Broken on 32-bit arm, kernel module compile errors 83.if ${MACHINE_CPUARCH} == "arm" 84BROKEN_OPTIONS+= OFED 85.endif 86 87# Things that don't work based on toolchain support. 88.if ${MACHINE} != "i386" && ${MACHINE} != "amd64" 89BROKEN_OPTIONS+= KERNEL_RETPOLINE 90.endif 91 92# EFI doesn't exist on powerpc or riscv and is broken on i386 93.if ${MACHINE:Mpowerpc} || ${MACHINE:Mriscv} || ${MACHINE} == "i386" 94BROKEN_OPTIONS+=EFI 95.endif 96 97.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64" 98__DEFAULT_NO_OPTIONS += FDT 99.else 100__DEFAULT_YES_OPTIONS += FDT 101.endif 102 103# expanded inline from bsd.mkopt.mk to avoid share/mk dependency 104 105# Those that default to yes 106.for var in ${__DEFAULT_YES_OPTIONS} 107.if !defined(MK_${var}) 108.if defined(WITHOUT_${var}) # WITHOUT always wins 109MK_${var}:= no 110.else 111MK_${var}:= yes 112.endif 113.else 114.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 115.error "Illegal value for MK_${var}: ${MK_${var}}" 116.endif 117.endif # !defined(MK_${var}) 118.endfor 119.undef __DEFAULT_YES_OPTIONS 120 121# Those that default to no 122.for var in ${__DEFAULT_NO_OPTIONS} 123.if !defined(MK_${var}) 124.if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins 125MK_${var}:= yes 126.else 127MK_${var}:= no 128.endif 129.else 130.if ${MK_${var}} != "yes" && ${MK_${var}} != "no" 131.error "Illegal value for MK_${var}: ${MK_${var}}" 132.endif 133.endif # !defined(MK_${var}) 134.endfor 135.undef __DEFAULT_NO_OPTIONS 136 137# 138# MK_* options which are always no, usually because they are 139# unsupported/badly broken on this architecture. 140# 141.for var in ${BROKEN_OPTIONS} 142MK_${var}:= no 143.endfor 144.undef BROKEN_OPTIONS 145#end of bsd.mkopt.mk expanded inline. 146 147# 148# MK_*_SUPPORT options which default to "yes" unless their corresponding 149# MK_* variable is set to "no". 150# 151.for var in \ 152 INET \ 153 INET6 154.if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no" 155MK_${var}_SUPPORT:= no 156.else 157.if defined(KERNBUILDDIR) # See if there's an opt_foo.h 158.if !defined(OPT_${var}) 159OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo 160.export OPT_${var} 161.endif 162.if ${OPT_${var}} == "" # nothing -> no 163MK_${var}_SUPPORT:= no 164.else 165MK_${var}_SUPPORT:= yes 166.endif 167.else # otherwise, yes 168MK_${var}_SUPPORT:= yes 169.endif 170.endif 171.endfor 172 173.if ${MK_SPLIT_KERNEL_DEBUG} == "no" 174MK_KERNEL_SYMBOLS:= no 175.endif 176 177.if ${MK_CDDL} == "no" 178MK_DTRACE:= no 179.endif 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