FreeBSD/Linux Kernel Cross Reference
sys/conf/kern.opts.mk
1 # $FreeBSD: releng/11.1/sys/conf/kern.opts.mk 319171 2017-05-30 03:02:07Z ngie $
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
25 __DEFAULT_YES_OPTIONS = \
26 AUTOFS \
27 BHYVE \
28 BLUETOOTH \
29 CCD \
30 CDDL \
31 CRYPT \
32 CUSE \
33 FORMAT_EXTENSIONS \
34 INET \
35 INET6 \
36 IPFILTER \
37 IPSEC_SUPPORT \
38 ISCSI \
39 KERNEL_SYMBOLS \
40 NETGRAPH \
41 PF \
42 SOURCELESS_HOST \
43 SOURCELESS_UCODE \
44 TESTS \
45 USB_GADGET_EXAMPLES \
46 ZFS
47
48 __DEFAULT_NO_OPTIONS = \
49 EISA \
50 EXTRA_TCP_STACKS \
51 NAND \
52 OFED \
53 REPRODUCIBLE_BUILD
54
55 # Some options are totally broken on some architectures. We disable
56 # them. If you need to enable them on an experimental basis, you
57 # must change this code.
58 # Note: These only apply to the list of modules we build by default
59 # and sometimes what is in the opt_*.h files by default.
60 # Kernel config files are unaffected, though some targets can be
61 # affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
62
63 # Things that don't work based on the CPU
64 .if ${MACHINE_CPUARCH} == "arm"
65 . if ${MACHINE_ARCH:Marmv6*} == ""
66 BROKEN_OPTIONS+= CDDL ZFS
67 . endif
68 .endif
69
70 .if ${MACHINE_CPUARCH} == "mips"
71 BROKEN_OPTIONS+= CDDL ZFS
72 .endif
73
74 .if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
75 BROKEN_OPTIONS+= ZFS
76 .endif
77
78 # Things that don't work because the kernel doesn't have the support
79 # for them.
80 .if ${MACHINE} != "i386"
81 BROKEN_OPTIONS+= EISA
82 .endif
83
84 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
85 BROKEN_OPTIONS+= OFED
86 .endif
87
88 # expanded inline from bsd.mkopt.mk to avoid share/mk dependency
89
90 # Those that default to yes
91 .for var in ${__DEFAULT_YES_OPTIONS}
92 .if !defined(MK_${var})
93 .if defined(WITHOUT_${var}) # WITHOUT always wins
94 MK_${var}:= no
95 .else
96 MK_${var}:= yes
97 .endif
98 .else
99 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
100 .error "Illegal value for MK_${var}: ${MK_${var}}"
101 .endif
102 .endif # !defined(MK_${var})
103 .endfor
104 .undef __DEFAULT_YES_OPTIONS
105
106 # Those that default to no
107 .for var in ${__DEFAULT_NO_OPTIONS}
108 .if !defined(MK_${var})
109 .if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
110 MK_${var}:= yes
111 .else
112 MK_${var}:= no
113 .endif
114 .else
115 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
116 .error "Illegal value for MK_${var}: ${MK_${var}}"
117 .endif
118 .endif # !defined(MK_${var})
119 .endfor
120 .undef __DEFAULT_NO_OPTIONS
121
122 #
123 # MK_* options which are always no, usually because they are
124 # unsupported/badly broken on this architecture.
125 #
126 .for var in ${BROKEN_OPTIONS}
127 MK_${var}:= no
128 .endfor
129 .undef BROKEN_OPTIONS
130 #end of bsd.mkopt.mk expanded inline.
131
132 #
133 # MK_*_SUPPORT options which default to "yes" unless their corresponding
134 # MK_* variable is set to "no".
135 #
136 .for var in \
137 INET \
138 INET6
139 .if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
140 MK_${var}_SUPPORT:= no
141 .else
142 .if defined(KERNBUILDDIR) # See if there's an opt_foo.h
143 .if !defined(OPT_${var})
144 OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
145 .export OPT_${var}
146 .endif
147 .if ${OPT_${var}} == "" # nothing -> no
148 MK_${var}_SUPPORT:= no
149 .else
150 MK_${var}_SUPPORT:= yes
151 .endif
152 .else # otherwise, yes
153 MK_${var}_SUPPORT:= yes
154 .endif
155 .endif
156 .endfor
157
158 # Some modules only compile successfully if option FDT is set, due to #ifdef FDT
159 # wrapped around declarations. Module makefiles can optionally compile such
160 # things using .if !empty(OPT_FDT)
161 .if !defined(OPT_FDT) && defined(KERNBUILDDIR)
162 OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h
163 .export OPT_FDT
164 .endif
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