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