xref: /freebsd/sys/conf/kern.opts.mk (revision e17f5b1d) 
1# $FreeBSD$
2
3# Options set in the build system that affect the kernel somehow.
4
5#
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
8# make(1) environment.
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.
12#
13
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).
19.include <bsd.own.mk>
20
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
23# src tree.
24
25KLDXREF_CMD?=	kldxref
26
27__DEFAULT_YES_OPTIONS = \
28    AUTOFS \
29    BHYVE \
30    BLUETOOTH \
31    CCD \
32    CDDL \
33    CRYPT \
34    CUSE \
35    EFI \
36    FORMAT_EXTENSIONS \
37    INET \
38    INET6 \
39    IPFILTER \
40    IPSEC_SUPPORT \
41    ISCSI \
42    KERNEL_SYMBOLS \
43    NETGRAPH \
44    PF \
45    SCTP_SUPPORT \
46    SOURCELESS_HOST \
47    SOURCELESS_UCODE \
48    TESTS \
49    USB_GADGET_EXAMPLES \
50    ZFS
51
52__DEFAULT_NO_OPTIONS = \
53    BHYVE_SNAPSHOT \
54    EXTRA_TCP_STACKS \
55    KERNEL_RETPOLINE \
56    OFED \
57    RATELIMIT \
58    REPRODUCIBLE_BUILD
59
60# Some options are totally broken on some architectures. We disable
61# them. If you need to enable them on an experimental basis, you
62# must change this code.
63# Note: These only apply to the list of modules we build by default
64# and sometimes what is in the opt_*.h files by default.
65# Kernel config files are unaffected, though some targets can be
66# affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
67
68# Things that don't work based on the CPU
69.if ${MACHINE_CPUARCH} == "arm"
70. if ${MACHINE_ARCH:Marmv[67]*} == ""
71BROKEN_OPTIONS+= CDDL ZFS
72. endif
73.endif
74
75.if ${MACHINE_CPUARCH} == "mips"
76BROKEN_OPTIONS+= CDDL ZFS SSP
77.endif
78
79.if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
80BROKEN_OPTIONS+= ZFS
81.endif
82
83.if ${MACHINE_CPUARCH} == "riscv"
84BROKEN_OPTIONS+= FORMAT_EXTENSIONS
85.endif
86
87# Things that don't work because the kernel doesn't have the support
88# for them.
89.if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
90BROKEN_OPTIONS+= OFED
91.endif
92
93# Things that don't work based on toolchain support.
94.if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
95BROKEN_OPTIONS+= KERNEL_RETPOLINE
96.endif
97
98# EFI doesn't exist on mips, powerpc, or riscv.
99.if ${MACHINE:Mmips} || ${MACHINE:Mpowerpc} || ${MACHINE:Mriscv}
100BROKEN_OPTIONS+=EFI
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# Some modules only compile successfully if option FDT is set, due to #ifdef FDT
174# wrapped around declarations.  Module makefiles can optionally compile such
175# things using .if !empty(OPT_FDT)
176.if !defined(OPT_FDT) && defined(KERNBUILDDIR)
177OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h
178.export OPT_FDT
179.endif
180