root/lm-sensors/trunk/Makefile @ 3096

Revision 3096, 16.1 KB (checked in by mmh, 9 years ago)

(mmh)
This patch makes optional the sysfs support in libsensors. The default is to
*disable* sysfs support if a 2.4.x kernel is detected, for all other versions,
support will be enabled. This can be overridden in the top-level Makefile.

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1#  Makefile - Makefile for a Linux module for reading sensor data.
2#  Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>
3#
4#  This program is free software; you can redistribute it and/or modify
5#  it under the terms of the GNU General Public License as published by
6#  the Free Software Foundation; either version 2 of the License, or
7#  (at your option) any later version.
8#
9#  This program is distributed in the hope that it will be useful,
10#  but WITHOUT ANY WARRANTY; without even the implied warranty of
11#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12#  GNU General Public License for more details.
13#
14#  You should have received a copy of the GNU General Public License
15#  along with this program; if not, write to the Free Software
16#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18# Everything you may want to change is in the top of this file. Usually, you
19# can just use the defaults, fortunately.
20
21# You need a full complement of GNU utilities to run this Makefile succesfully;
22# most notably, you need bash, GNU make, flex (>= 2.5.1) and bison.
23
24# If your /bin/sh is not bash, change the below definition so that make can
25# find bash. Or you can hope your sh-like shell understands all scripts.
26# I think so, but I have not tested it.
27#SHELL := /usr/bin/bash
28
29# The currently running kernel version. This is used right below to
30# determine where the kernel sources can be found.
31KERNELVERSION := $(shell uname -r)
32
33# The location of linux itself. This is used to find the kernel headers
34# and other things.
35#LINUX := /usr/src/linux
36LINUX := $(shell if [ -L "/lib/modules/$(KERNELVERSION)/build" ] ; \
37        then echo "/lib/modules/$(KERNELVERSION)/build" ; \
38        else echo "/usr/src/linux" ; fi)
39LINUX_HEADERS := $(LINUX)/include
40
41# If you have installed the i2c header at some other place (like
42# /usr/local/include/linux), set that directory here. Please check this out
43# if you get strange compilation errors; the default Linux i2c headers
44# may be used mistakenly. Note: This should point to the directory
45# *above* the linux/ subdirectory, so to /usr/local/include in the
46# above example.
47I2C_HEADERS := /usr/local/include
48#I2C_HEADERS := $(LINUX_HEADERS)
49
50# Uncomment the third line on SMP systems if the magic invocation fails.
51SMP := $(shell if grep -q '^[[:space:]]*\#define[[:space:]]*CONFIG_SMP[[:space:]]*1' $(LINUX_HEADERS)/linux/autoconf.h ; \
52               then echo 1; else echo 0; fi)
53#SMP := 0
54#SMP := 1
55
56# Uncomment the second or third line if the magic invocation fails.
57# We need to know whether CONFIG_MODVERSIONS is defined.
58MODVER := $(shell if grep -q '^[[:space:]]*\#define[[:space:]]*CONFIG_MODVERSIONS[[:space:]]*1' $(LINUX_HEADERS)/linux/autoconf.h ; \
59                  then echo 1; else echo 0; fi)
60#MODVER := 0
61#MODVER := 1
62
63# Uncomment the second line if you are a developer. This will enable many
64# additional warnings at compile-time
65WARN := 0
66#WARN := 1
67
68# Uncomment the second line if you want to get (loads of) debug information
69# at run-time.
70# Not recommended, unless you are actually debugging the code
71DEBUG := 0
72#DEBUG := 1
73
74# If you want to install at some other place then at from which you will run
75# everything, set DESTDIR to the extra prefix.
76DESTDIR :=
77
78# This is the prefix that will be used for almost all directories below.
79PREFIX := /usr/local
80
81# Your C compiler
82CC := gcc
83
84# This is the main modules directory into which the modules will be installed.
85# The magic invocation will return something like this:
86#   /lib/modules/2.4.29
87MODPREF := /lib/modules/$(shell $(CC) -I$(LINUX_HEADERS) -E etc/config.c | grep uts_release |cut -f 2 -d'"')
88
89# When building userspace for use with 2.4.x series kernels, we turn off
90# sysfs support by default.  You can override this (e.g. if you want
91# to build binaries that work for both 2.4.x, and 2.6.x and above)
92# by uncommenting the line after the next endif.  Keep in mind, if and only
93# if you do this: you will need to install the libsysfs libraries on your
94# kernel 2.4.x systems also.
95ifeq (,$(findstring /2.4., $(MODPREF)))
96        SYSFS_SUPPORT := 1
97else
98        SYSFS_SUPPORT :=
99endif
100#SYSFS_SUPPORT := 1
101
102# Prevent 2.6+ users from using improper targets, as this won't work.
103ifeq (,$(findstring /2.4., $(MODPREF)))
104    ifeq (, $(MAKECMDGOALS))
105        $(error For 2.6 kernels and later, use "make user")
106    endif
107    ifeq (install, $(MAKECMDGOALS))
108        $(error For 2.6 kernels and later, use "make user_install")
109    endif
110endif
111
112# This is the directory where sensors.conf will be installed, if no other
113# configuration file is found
114ETCDIR := /etc
115
116# You should not need to change this. It is the directory into which the
117# library files (both static and shared) will be installed.
118LIBDIR := $(PREFIX)/lib
119
120EXLDFLAGS := -Wl,-rpath,$(LIBDIR)
121
122# You should not need to change this. It is the directory into which the
123# executable program files will be installed. BINDIR for programs that are
124# also useful for normal users, SBINDIR for programs that can only be run
125# by the superuser.
126# Note that not all programs in this package are really installed;
127# some are just examples. You can always install them by hand, of
128# course.
129BINDIR := $(PREFIX)/bin
130SBINDIR := $(PREFIX)/sbin
131
132# You should not need to change this. It is the basic directory into which
133# include files will be installed. The actual directory will be
134# $(INCLUDEDIR)/linux for system include files, and $(INCLUDEDIR)/sensors
135# for library include files. If PREFIX equals the default /usr/local/bin,
136# you will be able to use '#include <linux/sensors.h>' regardless of the
137# current kernel selected.
138INCLUDEDIR := $(PREFIX)/include
139SYSINCLUDEDIR := $(INCLUDEDIR)/linux
140LIBINCLUDEDIR := $(INCLUDEDIR)/sensors
141
142# You should not need to change this. It is the base directory under which the
143# manual pages will be installed.
144MANDIR := $(PREFIX)/man
145
146MACHINE := $(shell uname -m)
147
148# Extra non-default programs to build; e.g., sensord
149# PROG_EXTRA := sensord
150
151# Set these to add preprocessor or compiler flags, or use
152# environment variables
153# CFLAGS :=
154# CPPFLAGS :=
155
156##################################################
157# Below this, nothing should need to be changed. #
158##################################################
159
160# Note that this is a monolithic Makefile; it calls no sub-Makefiles,
161# but instead, it compiles everything right from here. Yes, there are
162# some distinct advantages to this; see the following paper for more info:
163#   http://www.tip.net.au/~millerp/rmch/recu-make-cons-harm.html
164# Note that is still uses Makefile fragments in sub-directories; these
165# are called 'Module.mk'.
166
167# Within each Module.mk, rules and dependencies can be added to targets
168# all, install and clean. Use double colons instead of single ones
169# to do this.
170
171# The subdirectories we need to build things in
172SRCDIRS :=
173ifneq ($(MAKECMDGOALS),user)
174ifneq ($(MAKECMDGOALS),user_install)
175ifneq ($(MAKECMDGOALS),user_uninstall)
176ifneq ($(MAKECMDGOALS),package)
177ifneq ($(MAKECMDGOALS),userpackage)
178ifneq ($(MAKECMDGOALS),manhtml)
179SRCDIRS += mkpatch
180SRCDIRS += kernel kernel/busses kernel/chips
181endif
182endif
183endif
184endif
185endif
186endif
187SRCDIRS += kernel/include
188SRCDIRS += lib prog/detect prog/dump prog/eeprom prog/pwm \
189           prog/sensors prog/xeon ${PROG_EXTRA:%=prog/%} etc
190
191# Some often-used commands with default options
192MKDIR := mkdir -p
193RMDIR := rmdir
194RM := rm -f
195BISON := bison
196FLEX := flex
197AR := ar
198INSTALL := install
199LN := ln -sf
200GREP := grep
201AWK := awk
202SED := sed
203
204# Determine the default compiler flags
205# Set CFLAGS or CPPFLAGS above to add your own flags to all.
206# ALLCPPFLAGS/ALLCFLAGS are common flags, plus any user-specified overrides from the environment or make command line.
207# MODCPPFLAGS/MODCFLAGS is to create in-kernel object files (modules).
208# PROGCPPFLAGS/PROGCFLAGS is to create non-kernel object files (which are linked into executables).
209# ARCPPFLAGS/ARCFLAGS are used to create archive object files (static libraries).
210# LIBCPPFLAGS/LIBCFLAGS are for shared library objects.
211ALL_CPPFLAGS := -I. -Ikernel/include -I$(I2C_HEADERS)
212ALL_CFLAGS := -Wall
213
214ifeq ($(DEBUG),1)
215ALL_CPPFLAGS += -DDEBUG
216ALL_CFLAGS += -O -g
217else
218ALL_CFLAGS += -O2
219endif
220
221ifeq ($(WARN),1)
222ALL_CFLAGS += -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \
223            -Wcast-align -Wwrite-strings -Wnested-externs -Winline
224endif
225
226ALL_CPPFLAGS += $(CPPFLAGS)
227ALL_CFLAGS += $(CFLAGS)
228
229MODCPPFLAGS :=
230MODCFLAGS := -fno-strict-aliasing
231
232ifeq ($(MACHINE),alpha)
233MODCFLAGS += -ffixed-8 -mno-fp-regs -mcpu=ev56
234endif
235
236ifeq ($(MACHINE),x86_64)
237MODCFLAGS += -fno-common -fomit-frame-pointer -mno-red-zone \
238             -mcmodel=kernel -fno-reorder-blocks -finline-limit=2000 -fno-strength-reduce
239endif
240
241ifeq ($(MACHINE),mips)
242MODCFLAGS += -mabi=32 -mips3 -Wa,-32 -Wa,-mips3 -Wa,--trap
243endif
244
245ifeq ($(MACHINE),sparc32)
246MODCFLAGS += -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
247endif
248
249ifeq ($(MACHINE),sparc64)
250MODCFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow \
251             -ffixed-g4 -fcall-used-g5 -fcall-used-g7 -Wno-sign-compare \
252             -Wa,--undeclared-regs
253endif
254
255ifeq ($(SMP),1)
256MODCPPFLAGS += -D__SMP__
257endif
258
259ifeq ($(MODVER),1)
260MODCPPFLAGS += -DMODVERSIONS -include $(LINUX_HEADERS)/linux/modversions.h
261endif
262
263# This magic is from the kernel Makefile.
264# Extra cflags for kbuild 2.4.  The default is to forbid includes by kernel code
265# from user space headers.
266kbuild_2_4_nostdinc := -nostdinc $(shell LC_ALL=C $(CC) -print-search-dirs | sed -ne 's/install: \(.*\)/-I \1include/gp')
267
268MODCPPFLAGS += -D__KERNEL__ -DMODULE -DEXPORT_SYMTAB -fomit-frame-pointer $(ALL_CPPFLAGS) -I$(LINUX_HEADERS) $(kbuild_2_4_nostdinc)
269MODCFLAGS += $(ALL_CFLAGS)
270PROGCPPFLAGS := -DETCDIR="\"$(ETCDIR)\"" $(ALL_CPPFLAGS) -Wundef
271PROGCFLAGS := $(ALL_CFLAGS)
272ARCPPFLAGS := $(ALL_CPPFLAGS)
273ifdef SYSFS_SUPPORT
274ARCPPFLAGS := $(ARCPPFLAGS) -DSYSFS_SUPPORT
275endif
276ARCFLAGS := $(ALL_CFLAGS)
277LIBCPPFLAGS := $(ALL_CPPFLAGS)
278ifdef SYSFS_SUPPORT
279LIBCPPFLAGS := $(LIBCPPFLAGS) -DSYSFS_SUPPORT
280endif
281LIBCFLAGS := -fpic $(ALL_CFLAGS)
282
283.PHONY: all clean install version package dep
284
285# Make all the default rule
286all::
287
288# Include all makefiles for sub-modules
289INCLUDEFILES := 
290include $(patsubst %,%/Module.mk,$(SRCDIRS))
291ifneq ($(MAKECMDGOALS),clean)
292ifneq ($(MAKECMDGOALS),uninstall)
293ifneq ($(MAKECMDGOALS),user_uninstall)
294ifneq ($(MAKECMDGOALS),help)
295ifneq ($(MAKECMDGOALS),package)
296ifneq ($(MAKECMDGOALS),userpackage)
297include $(INCLUDEFILES)
298endif
299endif
300endif
301endif
302endif
303endif
304
305# Man pages
306MANPAGES := $(LIBMAN3FILES) $(LIBMAN5FILES) $(PROGDETECTMAN8FILES) $(PROGDUMPMAN8FILES) \
307            $(PROGSENSORSMAN1FILES) $(PROGPWMMAN8FILES) prog/sensord/sensord.8
308
309# Making the dependency files - done automatically!
310dep :
311
312user ::
313user_install::
314        @echo "*** Important note:"
315        @echo "***  * The libsensors configuration file ($(ETCDIR)/sensors.conf) is never"
316        @echo "***    overwritten by our installation process, so that you won't lose"
317        @echo "***    your personal settings in that file. You still can get our latest"
318        @echo "***    default config file in etc/sensors.conf.eg and manually copy it to"
319        @echo "***    $(ETCDIR)/sensors.conf if you want. You will then want to edit it"
320        @echo "***    to fit your needs again."
321all :: user
322install :: all user_install
323ifeq ($(DESTDIR),)
324        -/sbin/depmod -a
325else
326        @echo "*** This is a \`staged' install using \"$(DESTDIR)\" as prefix."
327        @echo "***"
328        @echo "*** Once the modules have been moved to their final destination"
329        @echo "*** you must run the command \"/sbin/depmod -a\"."
330        @echo "***"
331        @echo "*** Alternatively, if you build a package (e.g. rpm), include the"
332        @echo "*** command \"/sbin/depmod -a\" in the post-(un)install procedure."
333        @echo "***"
334        @echo "*** The depmod command mentioned above may generate errors. We are"
335        @echo "*** aware of the problem and are working on a solution."
336endif
337
338clean::
339        $(RM) lm_sensors-*
340
341user_uninstall::
342
343uninstall :: user_uninstall
344        @echo "*** Note:"
345        @echo "***  * Kernel modules were not uninstalled."
346
347# This is tricky, but it works like a charm. It needs lots of utilities
348# though: cut, find, gzip, ln, tail and tar.
349package: version clean
350        lmversion=`tail -1 version.h|cut -f 2 -d \"`; \
351        lmpackage=lm_sensors-$$lmversion; \
352        ln -s . $$lmpackage;  \
353        find $$lmpackage/ -type f | grep -v ^$$lmpackage/$$lmpackage$$ | \
354                                    grep -v ^$$lmpackage/$$lmpackage.tar$$ | \
355                                    grep -v ^$$lmpackage/$$ | \
356                                    grep -v /CVS | \
357                                    grep -v /\\.# | \
358                                    tar rvf $$lmpackage.tar -T -; \
359        gzip -9 $$lmpackage.tar ;\
360        $(RM) $$lmpackage.tar $$lmpackage
361        cat doc/developers/checklist
362
363# doesn't work well yet... needs Makefile changes too
364userpackage: version clean $(KERNELINCLUDEDIR)/sensors.h
365        lmversion=`tail -1 version.h|cut -f 2 -d \"`; \
366        lmpackage=lm_sensors-user-$$lmversion; \
367        ln -s . $$lmpackage;  \
368        find $$lmpackage/ -type f | grep -v ^$$lmpackage/$$lmpackage$$ | \
369                                    grep -v ^$$lmpackage/$$lmpackage.tar$$ | \
370                                    grep -v ^$$lmpackage/doc/chips | \
371                                    grep -v ^$$lmpackage/doc/busses | \
372                                    grep -v ^$$lmpackage/kernel/chips | \
373                                    grep -v ^$$lmpackage/kernel/busses | \
374                                    grep -v ^$$lmpackage/$$ | \
375                                    grep -v /CVS | \
376                                    grep -v /\\.# | \
377                                    tar rvf $$lmpackage.tar -T -; \
378        gzip -9 $$lmpackage.tar ;\
379        $(RM) $$lmpackage.tar $$lmpackage
380        cat doc/developers/checklist
381
382version:
383        $(RM) version.h
384        echo '#define LM_DATE "'`date +'%Y%m%d'`\" > version.h
385        echo -n 'Version: '; \
386        echo '#define LM_VERSION "'`read VER; echo $$VER`\" >> version.h
387
388help:
389        @echo 'Make targets are:'
390        @echo '  all (default): build modules and userspace programs'
391        @echo '  install: install modules and userspace programs'
392        @echo '  user: build userspace programs'
393        @echo '  user_install: install userspace programs'
394        @echo '  user_uninstall: remove userspace programs'
395        @echo '  clean: cleanup'
396        @echo '  package: create a distribution package'
397        @echo 'Note: make dep is automatic'
398
399$(LINUX)/.config:
400        @echo
401        @echo "Error - missing file $(LINUX)/.config !! "
402        @echo "  Verify kernel source is in $(LINUX) and then"
403        @echo "  cd to $(LINUX) and run 'make config' !!"
404        @echo
405        @echo "Exception: if you're using a stock RedHat kernel..."
406        @echo "  (1) Install the appropriate kernel-source RPM."
407        @echo "  (2) Copy the appropriate config..."
408        @echo "      from $(LINUX)/configs/<...>"
409        @echo "      to $(LINUX)/.config"
410        @echo "  (3) Do *NOT* 'make dep' or 'make config'."
411        @echo
412        @exit 1
413
414# Generate html man pages to be copied to the lm_sensors website.
415# This uses the man2html from here
416# http://ftp.math.utah.edu/pub/sgml/
417# which works directly from the nroff source
418manhtml:
419        $(MKDIR) html
420        cp $(MANPAGES) html
421        cd html ; \
422        export LOGNAME=sensors ; \
423        export HOSTNAME=stimpy.netroedge.com ; \
424        man2html *.[1-8] ; \
425        $(RM) *.[1-8]
426
427# Here, we define all implicit rules we want to use.
428
429.SUFFIXES:
430
431# We need to create dependency files. Tricky. We sed rule puts dir/file.d and
432# dir/file.c in front of the dependency file rule.
433
434# .o files are used for modules
435# depend on the kernel config file!
436%.o: %.c $(LINUX)/.config
437        $(CC) $(MODCPPFLAGS) $(MODCFLAGS) -c $< -o $@
438
439%.d: %.c $(LINUX)/.config
440        $(CC) -M -MG $(MODCPPFLAGS) $(MODCFLAGS) $< | \
441        $(SED) -e 's@^\(.*\)\.o:@$*.d $*.o: Makefile '`dirname $*.d`/Module.mk' @' > $@
442
443
444
445# .ro files are used for programs (as opposed to modules)
446%.ro: %.c
447        $(CC) $(PROGCPPFLAGS) $(PROGCFLAGS) -c $< -o $@
448
449%.rd: %.c
450        $(CC) -M -MG $(PROGCPPFLAGS) $(PROGCFLAGS) $< | \
451        $(SED) -e 's@^\(.*\)\.o:@$*.rd $*.ro: Makefile '`dirname $*.rd`/Module.mk' @' > $@
452
453
454%: %.ro
455        $(CC) $(EXLDFLAGS) -o $@ $^
456
457
458# .ao files are used for static archives
459%.ao: %.c
460        $(CC) $(ARCPPFLAGS) $(ARCFLAGS) -c $< -o $@
461
462%.ad: %.c
463        $(CC) -M -MG $(ARCPPFLAGS) $(ARCFLAGS) $< | \
464        $(SED) -e 's@^\(.*\)\.o:@$*.ad $*.ao: Makefile '`dirname $*.ad`/Module.mk' @' > $@
465
466
467# .lo files are used for shared libraries
468%.lo: %.c
469        $(CC) $(LIBCPPFLAGS) $(LIBCFLAGS) -c $< -o $@
470
471%.ld: %.c
472        $(CC) -M -MG $(LIBCPPFLAGS) $(LIBCFLAGS) $< | \
473        $(SED) -e 's@^\(.*\)\.o:@$*.ld $*.lo: Makefile '`dirname $*.ld`/Module.mk' @' > $@
474
475
476# Flex and Bison
477%c: %y
478        $(BISON) -p sensors_yy -d $< -o $@
479
480%.c: %.l
481        $(FLEX) -Psensors_yy -t $< > $@
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