FreeBSD/Linux Kernel Cross Reference
sys/conf/kmod.mk
1 # From: @(#)bsd.prog.mk 5.26 (Berkeley) 6/25/91
2 # $FreeBSD: releng/5.2/sys/conf/kmod.mk 122894 2003-11-19 05:08:27Z imp $
3 #
4 # The include file <bsd.kmod.mk> handles installing Kernel Loadable Device
5 # drivers (KLD's).
6 #
7 #
8 # +++ variables +++
9 #
10 # CLEANFILES Additional files to remove for the clean and cleandir targets.
11 #
12 # KMOD The name of the kernel module to build.
13 #
14 # KMODDIR Base path for kernel modules (see kld(4)). [/boot/kernel]
15 #
16 # KMODOWN KLD owner. [${BINOWN}]
17 #
18 # KMODGRP KLD group. [${BINGRP}]
19 #
20 # KMODMODE KLD mode. [${BINMODE}]
21 #
22 # KMODLOAD Command to load a kernel module [/sbin/kldload]
23 #
24 # KMODUNLOAD Command to unload a kernel module [/sbin/kldunload]
25 #
26 # PROG The name of the kernel module to build.
27 # If not supplied, ${KMOD}.o is used.
28 #
29 # SRCS List of source files
30 #
31 # DESTDIR Change the tree where the module gets installed. [not set]
32 #
33 # MFILES Optionally a list of interfaces used by the module.
34 # This file contains a default list of interfaces.
35 #
36 # EXPORT_SYMS A list of symbols that should be exported from the module,
37 # or the name of a file containing a list of symbols, or YES
38 # to export all symbols. If not defined, no symbols are
39 # exported.
40 #
41 # +++ targets +++
42 #
43 # install:
44 # install the kernel module; if the Makefile
45 # does not itself define the target install, the targets
46 # beforeinstall and afterinstall may also be used to cause
47 # actions immediately before and after the install target
48 # is executed.
49 #
50 # load:
51 # Load KLD.
52 #
53 # unload:
54 # Unload KLD.
55 #
56 # bsd.obj.mk: clean, cleandir and obj
57 # bsd.dep.mk: cleandepend, depend and tags
58 #
59
60 AWK?= awk
61 KMODLOAD?= /sbin/kldload
62 KMODUNLOAD?= /sbin/kldunload
63 OBJCOPY?= objcopy
64
65 .if defined(KMODDEPS)
66 .error "Do not use KMODDEPS on 5.0+, use MODULE_VERSION/MODULE_DEPEND"
67 .endif
68
69 .include <bsd.init.mk>
70
71 .SUFFIXES: .out .o .c .cc .cxx .C .y .l .s .S
72
73 CFLAGS+= ${COPTS} -D_KERNEL ${CWARNFLAGS}
74 CFLAGS+= -DKLD_MODULE
75
76 # Don't use any standard or source-relative include directories.
77 # Since -nostdinc will annull any previous -I paths, we repeat all
78 # such paths after -nostdinc. It doesn't seem to be possible to
79 # add to the front of `make' variable.
80 _ICFLAGS:= ${CFLAGS:M-I*}
81 CFLAGS+= -nostdinc -I- ${INCLMAGIC} ${_ICFLAGS}
82 .if defined(KERNBUILDDIR)
83 CFLAGS+= -include ${KERNBUILDDIR}/opt_global.h
84 .endif
85
86 # Add -I paths for system headers. Individual KLD makefiles don't
87 # need any -I paths for this. Similar defaults for .PATH can't be
88 # set because there are no standard paths for non-headers.
89 CFLAGS+= -I. -I@
90
91 # Add a -I path to standard headers like <stddef.h>. Use a relative
92 # path to src/include if possible. If the @ symlink hasn't been built
93 # yet, then we can't tell if the relative path exists. Add both the
94 # potential relative path and an absolute path in that case.
95 .if exists(@)
96 .if exists(@/../include)
97 CFLAGS+= -I@/../include
98 .else
99 CFLAGS+= -I${DESTDIR}/usr/include
100 .endif
101 .else # !@
102 CFLAGS+= -I@/../include -I${DESTDIR}/usr/include
103 .endif # @
104
105 CFLAGS+= -finline-limit=${INLINE_LIMIT}
106
107 # Disallow common variables, and if we end up with commons from
108 # somewhere unexpected, allocate storage for them in the module itself.
109 CFLAGS+= -fno-common
110 LDFLAGS+= -d -warn-common
111
112 CFLAGS+= ${DEBUG_FLAGS}
113
114 OBJS+= ${SRCS:N*.h:R:S/$/.o/g}
115
116 .if !defined(PROG)
117 PROG= ${KMOD}.ko
118 .endif
119
120 .if !defined(DEBUG)
121 FULLPROG= ${PROG}
122 .else
123 FULLPROG= ${PROG}.debug
124 ${PROG}: ${FULLPROG}
125 ${OBJCOPY} --strip-debug ${FULLPROG} ${PROG}
126 .endif
127
128 ${FULLPROG}: ${KMOD}.kld
129 ${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} ${KMOD}.kld
130
131 EXPORT_SYMS?= NO
132 .if ${EXPORT_SYMS} != YES
133 CLEANFILES+= ${.OBJDIR}/export_syms
134 .endif
135
136 ${KMOD}.kld: ${OBJS}
137 ${LD} ${LDFLAGS} -r -d -o ${.TARGET} ${OBJS}
138 .if defined(EXPORT_SYMS)
139 .if ${EXPORT_SYMS} != YES
140 .if ${EXPORT_SYMS} == NO
141 touch ${.OBJDIR}/export_syms
142 .elif !exists(${.CURDIR}/${EXPORT_SYMS})
143 echo ${EXPORT_SYMS} > ${.OBJDIR}/export_syms
144 .else
145 grep -v '^#' < ${EXPORT_SYMS} > ${.OBJDIR}/export_syms
146 .endif
147 awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
148 ${.OBJDIR}/export_syms | \
149 xargs -J% ${OBJCOPY} % ${.TARGET}
150 .endif
151 .endif
152
153 _ILINKS=@ machine
154
155 all: objwarn ${PROG}
156
157 beforedepend: ${_ILINKS}
158 @rm -f .depend
159
160 # Ensure that the links exist without depending on it when it exists which
161 # causes all the modules to be rebuilt when the directory pointed to changes.
162 .for _link in ${_ILINKS}
163 .if !exists(${.OBJDIR}/${_link})
164 ${OBJS}: ${_link}
165 .endif
166 .endfor
167
168 # Search for kernel source tree in standard places.
169 .for _dir in ${.CURDIR}/../.. ${.CURDIR}/../../.. /sys /usr/src/sys
170 .if !defined(SYSDIR) && exists(${_dir}/kern)
171 SYSDIR= ${_dir}
172 .endif
173 .endfor
174 .if !defined(SYSDIR) || !exists(${SYSDIR}/kern)
175 .error "can't find kernel source tree"
176 .endif
177
178 ${_ILINKS}:
179 @case ${.TARGET} in \
180 machine) \
181 path=${SYSDIR}/${MACHINE_ARCH}/include ;; \
182 @) \
183 path=${SYSDIR} ;; \
184 esac ; \
185 path=`(cd $$path && /bin/pwd)` ; \
186 ${ECHO} ${.TARGET} "->" $$path ; \
187 ln -s $$path ${.TARGET}
188
189 CLEANFILES+= ${PROG} ${KMOD}.kld ${OBJS} ${_ILINKS} symb.tmp tmp.o
190
191 .if defined(DEBUG)
192 CLEANFILES+= ${FULLPROG}
193 .endif
194
195 .if !target(install)
196
197 _INSTALLFLAGS:= ${INSTALLFLAGS}
198 .for ie in ${INSTALLFLAGS_EDIT}
199 _INSTALLFLAGS:= ${_INSTALLFLAGS${ie}}
200 .endfor
201
202 .if defined(DEBUG)
203 install.debug:
204 cd ${.CURDIR}; ${MAKE} -DINSTALL_DEBUG install
205 .endif
206
207 .if !target(realinstall)
208 realinstall: _kmodinstall
209 .ORDER: beforeinstall _kmodinstall
210 .if defined(DEBUG) && defined(INSTALL_DEBUG)
211 _kmodinstall:
212 ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
213 ${_INSTALLFLAGS} ${FULLPROG} ${DESTDIR}${KMODDIR}
214 .else
215 _kmodinstall:
216 ${INSTALL} -o ${KMODOWN} -g ${KMODGRP} -m ${KMODMODE} \
217 ${_INSTALLFLAGS} ${PROG} ${DESTDIR}${KMODDIR}
218
219 .include <bsd.links.mk>
220
221 .if !defined(NO_XREF)
222 afterinstall: _kldxref
223 .ORDER: realinstall _kldxref
224 .ORDER: _installlinks _kldxref
225 _kldxref:
226 @if type kldxref >/dev/null 2>&1; then \
227 ${ECHO} kldxref ${DESTDIR}${KMODDIR}; \
228 kldxref ${DESTDIR}${KMODDIR}; \
229 fi
230 .endif
231 .endif
232 .endif !target(realinstall)
233
234 .endif !target(install)
235
236 .if !target(load)
237 load: ${PROG}
238 ${KMODLOAD} -v ${.OBJDIR}/${KMOD}.ko
239 .endif
240
241 .if !target(unload)
242 unload:
243 ${KMODUNLOAD} -v ${KMOD}
244 .endif
245
246 .if defined(KERNBUILDDIR)
247 .PATH: ${KERNBUILDDIR}
248 CFLAGS += -I${KERNBUILDDIR}
249 .for _src in ${SRCS:Mopt_*.h}
250 CLEANFILES+= ${_src}
251 .if !target(${_src})
252 ${_src}:
253 ln -s ${KERNBUILDDIR}/${_src} ${.TARGET}
254 .endif
255 .endfor
256 .else
257 .for _src in ${SRCS:Mopt_*.h}
258 CLEANFILES+= ${_src}
259 .if !target(${_src})
260 ${_src}:
261 touch ${.TARGET}
262 .endif
263 .endfor
264 .endif
265
266 MFILES?= kern/bus_if.m kern/device_if.m dev/iicbus/iicbb_if.m \
267 dev/iicbus/iicbus_if.m isa/isa_if.m \
268 libkern/iconv_converter_if.m \
269 dev/mii/miibus_if.m \
270 dev/pccard/card_if.m dev/pccard/power_if.m dev/pci/pci_if.m \
271 dev/pci/pcib_if.m dev/ppbus/ppbus_if.m dev/smbus/smbus_if.m \
272 dev/usb/usb_if.m dev/sound/pcm/ac97_if.m dev/sound/pcm/channel_if.m \
273 dev/sound/pcm/feeder_if.m dev/sound/pcm/mixer_if.m pci/agp_if.m \
274 opencrypto/crypto_if.m pc98/pc98/canbus_if.m dev/uart/uart_if.m
275
276 .for _srcsrc in ${MFILES}
277 .for _ext in c h
278 .for _src in ${SRCS:M${_srcsrc:T:R}.${_ext}}
279 CLEANFILES+= ${_src}
280 .if !target(${_src})
281 .if !exists(@)
282 ${_src}: @
283 .endif
284 .if exists(@)
285 ${_src}: @/tools/makeobjops.awk @/${_srcsrc}
286 .endif
287 ${AWK} -f @/tools/makeobjops.awk @/${_srcsrc} -${_ext}
288 .endif
289 .endfor # _src
290 .endfor # _ext
291 .endfor # _srcsrc
292
293 .for _ext in c h
294 .if ${SRCS:Mvnode_if.${_ext}} != ""
295 CLEANFILES+= vnode_if.${_ext}
296 .if !exists(@)
297 vnode_if.${_ext}: @
298 .endif
299 .if exists(@)
300 vnode_if.${_ext}: @/tools/vnode_if.awk @/kern/vnode_if.src
301 .endif
302 ${AWK} -f @/tools/vnode_if.awk @/kern/vnode_if.src -${_ext}
303 .endif
304 .endfor
305
306 .if ${SRCS:Mmiidevs.h} != ""
307 CLEANFILES+= miidevs.h
308 .if !exists(@)
309 miidevs.h: @
310 .endif
311 .if exists(@)
312 miidevs.h: @/tools/devlist2h.awk @/dev/mii/miidevs
313 .endif
314 ${AWK} -f @/tools/devlist2h.awk @/dev/mii/miidevs
315 .endif
316
317 regress:
318
319 lint: ${SRCS}
320 ${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC:M*.c}
321
322 .include <bsd.dep.mk>
323
324 .if !exists(${.OBJDIR}/${DEPENDFILE})
325 ${OBJS}: ${SRCS:M*.h}
326 .endif
327
328 .include <bsd.obj.mk>
329 .include "kern.mk"
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