FreeBSD/Linux Kernel Cross Reference
sys/conf/kern.opts.mk
1 # $FreeBSD: releng/11.0/sys/conf/kern.opts.mk 301814 2016-06-10 19:06:11Z jtl $
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 ISCSI \
38 KERNEL_SYMBOLS \
39 NETGRAPH \
40 PF \
41 SOURCELESS_HOST \
42 SOURCELESS_UCODE \
43 USB_GADGET_EXAMPLES \
44 ZFS
45
46 __DEFAULT_NO_OPTIONS = \
47 EISA \
48 EXTRA_TCP_STACKS \
49 NAND \
50 OFED
51
52 # Some options are totally broken on some architectures. We disable
53 # them. If you need to enable them on an experimental basis, you
54 # must change this code.
55 # Note: These only apply to the list of modules we build by default
56 # and sometimes what is in the opt_*.h files by default.
57 # Kernel config files are unaffected, though some targets can be
58 # affected by KERNEL_SYMBOLS, FORMAT_EXTENSIONS, CTF and SSP.
59
60 # Things that don't work based on the CPU
61 .if ${MACHINE_CPUARCH} == "arm"
62 . if ${MACHINE_ARCH:Marmv6*} == ""
63 BROKEN_OPTIONS+= CDDL ZFS
64 . endif
65 .endif
66
67 .if ${MACHINE_CPUARCH} == "mips"
68 BROKEN_OPTIONS+= CDDL ZFS
69 .endif
70
71 .if ${MACHINE_CPUARCH} == "powerpc" && ${MACHINE_ARCH} == "powerpc"
72 BROKEN_OPTIONS+= ZFS
73 .endif
74
75 # Things that don't work because the kernel doesn't have the support
76 # for them.
77 .if ${MACHINE} != "i386"
78 BROKEN_OPTIONS+= EISA
79 .endif
80
81 .if ${MACHINE} != "i386" && ${MACHINE} != "amd64"
82 BROKEN_OPTIONS+= OFED
83 .endif
84
85 # expanded inline from bsd.mkopt.mk to avoid share/mk dependency
86
87 # Those that default to yes
88 .for var in ${__DEFAULT_YES_OPTIONS}
89 .if !defined(MK_${var})
90 .if defined(WITHOUT_${var}) # WITHOUT always wins
91 MK_${var}:= no
92 .else
93 MK_${var}:= yes
94 .endif
95 .else
96 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
97 .error "Illegal value for MK_${var}: ${MK_${var}}"
98 .endif
99 .endif # !defined(MK_${var})
100 .endfor
101 .undef __DEFAULT_YES_OPTIONS
102
103 # Those that default to no
104 .for var in ${__DEFAULT_NO_OPTIONS}
105 .if !defined(MK_${var})
106 .if defined(WITH_${var}) && !defined(WITHOUT_${var}) # WITHOUT always wins
107 MK_${var}:= yes
108 .else
109 MK_${var}:= no
110 .endif
111 .else
112 .if ${MK_${var}} != "yes" && ${MK_${var}} != "no"
113 .error "Illegal value for MK_${var}: ${MK_${var}}"
114 .endif
115 .endif # !defined(MK_${var})
116 .endfor
117 .undef __DEFAULT_NO_OPTIONS
118
119 #
120 # MK_* options which are always no, usually because they are
121 # unsupported/badly broken on this architecture.
122 #
123 .for var in ${BROKEN_OPTIONS}
124 MK_${var}:= no
125 .endfor
126 .undef BROKEN_OPTIONS
127 #end of bsd.mkopt.mk expanded inline.
128
129 #
130 # MK_*_SUPPORT options which default to "yes" unless their corresponding
131 # MK_* variable is set to "no".
132 #
133 .for var in \
134 INET \
135 INET6
136 .if defined(WITHOUT_${var}_SUPPORT) || ${MK_${var}} == "no"
137 MK_${var}_SUPPORT:= no
138 .else
139 .if defined(KERNBUILDDIR) # See if there's an opt_foo.h
140 .if !defined(OPT_${var})
141 OPT_${var}!= cat ${KERNBUILDDIR}/opt_${var:tl}.h; echo
142 .export OPT_${var}
143 .endif
144 .if ${OPT_${var}} == "" # nothing -> no
145 MK_${var}_SUPPORT:= no
146 .else
147 MK_${var}_SUPPORT:= yes
148 .endif
149 .else # otherwise, yes
150 MK_${var}_SUPPORT:= yes
151 .endif
152 .endif
153 .endfor
154
155 # Some modules only compile successfully if option FDT is set, due to #ifdef FDT
156 # wrapped around declarations. Module makefiles can optionally compile such
157 # things using .if !empty(OPT_FDT)
158 .if !defined(OPT_FDT) && defined(KERNBUILDDIR)
159 OPT_FDT!= sed -n '/FDT/p' ${KERNBUILDDIR}/opt_platform.h
160 .export OPT_FDT
161 .endif
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