Module.mk - Makefile for a Linux module for reading sensor data.

Copyright (c) 1998, 1999 Frodo Looijaard frodol@dds.nl

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

MA 02110-1301 USA.

Note that MODULE_DIR (the directory in which this file resides) is a

'simply expanded variable'. That means that its value is substituted

verbatim in the rules, until it is redefined.

MODULE_DIR := lib LIB_DIR := $(MODULE_DIR)

The manual dirs and files

LIBMAN3DIR := $(MANDIR)/man3 LIBMAN3FILES := $(MODULE_DIR)/libsensors.3 LIBMAN5DIR := $(MANDIR)/man5 LIBMAN5FILES := $(MODULE_DIR)/sensors.conf.5

The main and minor version of the library

The library soname (major number) must be changed if and only if the interface is

changed in a backward incompatible way. The interface is defined by

the public header files - in this case they are error.h and sensors.h.

LIBMAINVER := 4 LIBMINORVER := 4.0 LIBVER := $(LIBMAINVER).$(LIBMINORVER)

The static lib name, the shared lib name, and the internal ('so') name of

the shared lib.

LIBSHBASENAME := libsensors.so LIBSHLIBNAME := libsensors.so.$(LIBVER) LIBSTLIBNAME := libsensors.a LIBSHSONAME := libsensors.so.$(LIBMAINVER)

LIBTARGETS := $(MODULE_DIR)/$(LIBSHLIBNAME) \ $(MODULE_DIR)/$(LIBSHSONAME) $(MODULE_DIR)/$(LIBSHBASENAME) ifeq ($(BUILD_STATIC_LIB),1) LIBTARGETS += $(MODULE_DIR)/$(LIBSTLIBNAME) endif

LIBCSOURCES := $(MODULE_DIR)/data.c $(MODULE_DIR)/general.c \ $(MODULE_DIR)/error.c $(MODULE_DIR)/access.c \ $(MODULE_DIR)/init.c $(MODULE_DIR)/sysfs.c

LIBOTHEROBJECTS := $(MODULE_DIR)/conf-parse.o $(MODULE_DIR)/conf-lex.o LIBSHOBJECTS := $(LIBCSOURCES:.c=.lo) $(LIBOTHEROBJECTS:.o=.lo) LIBSTOBJECTS := $(LIBCSOURCES:.c=.ao) $(LIBOTHEROBJECTS:.o=.ao) LIBEXTRACLEAN := $(MODULE_DIR)/conf-parse.h $(MODULE_DIR)/conf-parse.c \ $(MODULE_DIR)/conf-lex.c

LIBHEADERFILES := $(MODULE_DIR)/error.h $(MODULE_DIR)/sensors.h

How to create the shared library

$(MODULE_DIR)/$(LIBSHLIBNAME): $(LIBSHOBJECTS) $(LIB_DIR)/libsensors.map $(CC) -shared $(LDFLAGS) -Wl,--version-script=$(LIB_DIR)/libsensors.map -Wl,-soname,$(LIBSHSONAME) -o $@ $(LIBSHOBJECTS) -lc -lm

$(MODULE_DIR)/$(LIBSHSONAME): $(MODULE_DIR)/$(LIBSHLIBNAME) $(RM) $@ $(LN) $(LIBSHLIBNAME) $@

$(MODULE_DIR)/$(LIBSHBASENAME): $(MODULE_DIR)/$(LIBSHLIBNAME) $(RM) $@ $(LN) $(LIBSHLIBNAME) $@

And the static library

$(MODULE_DIR)/$(LIBSTLIBNAME): $(LIBSTOBJECTS) $(RM) $@ $(AR) rcvs $@ $^

Depencies for non-C sources

$(MODULE_DIR)/conf-lex.c: $(MODULE_DIR)/conf-lex.l $(MODULE_DIR)/general.h \ $(MODULE_DIR)/data.h $(MODULE_DIR)/conf-parse.h $(MODULE_DIR)/conf-parse.c: $(MODULE_DIR)/conf-parse.y $(MODULE_DIR)/general.h \ $(MODULE_DIR)/data.h $(MODULE_DIR)/conf-parse.h: $(MODULE_DIR)/conf-parse.c

Include all dependency files

INCLUDEFILES += $(LIBSHOBJECTS:.lo=.ld) $(LIBSTOBJECTS:.ao=.ad)

Special warning prevention for flex-generated files

FLEXNOWARN:=-Wno-shadow -Wno-undef -Wno-unused -Wno-missing-prototypes -Wno-sign-compare $(MODULE_DIR)/conf-lex.ao: $(MODULE_DIR)/conf-lex.c $(CC) $(ARCPPFLAGS) $(ARCFLAGS) $(FLEXNOWARN) -c $< -o $@ $(MODULE_DIR)/conf-lex.lo: $(MODULE_DIR)/conf-lex.c $(CC) $(LIBCPPFLAGS) $(LIBCFLAGS) $(FLEXNOWARN) -c $< -o $@

Special warning prevention for bison-generated files

YACCNOWARN:=-Wno-undef $(MODULE_DIR)/conf-parse.ao: $(MODULE_DIR)/conf-parse.c $(CC) $(ARCPPFLAGS) $(ARCFLAGS) $(YACCNOWARN) -c $< -o $@ $(MODULE_DIR)/conf-parse.lo: $(MODULE_DIR)/conf-parse.c $(CC) $(LIBCPPFLAGS) $(LIBCFLAGS) $(YACCNOWARN) -c $< -o $@

REMOVELIBST := $(patsubst $(MODULE_DIR)/%,$(DESTDIR)$(LIBDIR)/%,$(LIB_DIR)/$(LIBSTLIBNAME)) REMOVELIBSH := $(patsubst $(MODULE_DIR)/%,$(DESTDIR)$(LIBDIR)/%,$(LIB_DIR)/$(LIBSHLIBNAME)) REMOVELNSO := $(DESTDIR)$(LIBDIR)/$(LIBSHSONAME) REMOVELNBS := $(DESTDIR)$(LIBDIR)/$(LIBSHBASENAME) REMOVELIBHF := $(patsubst $(MODULE_DIR)/%,$(DESTDIR)$(LIBINCLUDEDIR)/%,$(LIBHEADERFILES)) REMOVEMAN3 := $(patsubst $(MODULE_DIR)/%,$(DESTDIR)$(LIBMAN3DIR)/%,$(LIBMAN3FILES)) REMOVEMAN5 := $(patsubst $(MODULE_DIR)/%,$(DESTDIR)$(LIBMAN5DIR)/%,$(LIBMAN5FILES))

all-lib: $(LIBTARGETS) user :: all-lib

Generate warnings if the install directory isn't in /etc/ld.so.conf

or if the library wasn't there before (which means ldconfig must be run).

Note that some ld.so's put /usr/lib and /lib first, others put them last,

so we can't make any assumptions.

install-lib: all-lib $(MKDIR) $(DESTDIR)$(LIBDIR) $(DESTDIR)$(LIBINCLUDEDIR) $(DESTDIR)$(LIBMAN3DIR) $(DESTDIR)$(LIBMAN5DIR) @if [ -z "$(DESTDIR)" -a ! -e "$(LIBDIR)/$(LIBSHSONAME)" ] ; then \ echo '***********' ; \ echo 'Warning: This is the first installation of the $(LIBSHSONAME)' ; \ echo ' library files in $(LIBDIR)!' ; \ echo ' You must update the library cache or the userspace tools may fail' ; \ echo ' or have unpredictable results!' ; \ echo ' Run the following command: /sbin/ldconfig' ; \ echo '***********' ; \ fi ifeq ($(BUILD_STATIC_LIB),1) $(INSTALL) -m 644 $(LIB_DIR)/$(LIBSTLIBNAME) $(DESTDIR)$(LIBDIR) endif $(INSTALL) -m 755 $(LIB_DIR)/$(LIBSHLIBNAME) $(DESTDIR)$(LIBDIR) $(LN) $(LIBSHLIBNAME) $(DESTDIR)$(LIBDIR)/$(LIBSHSONAME) $(LN) $(LIBSHSONAME) $(DESTDIR)$(LIBDIR)/$(LIBSHBASENAME) @if [ -z "$(DESTDIR)" -a "$(LIBDIR)" != "/usr/lib" -a "$(LIBDIR)" != "/lib" ] ; then \ if [ -e "/usr/lib/$(LIBSHSONAME)" -o -e "/usr/lib/$(LIBSHBASENAME)" ] ; then \ echo '***********' ; \ echo 'Warning: You have at least one $(LIBSHBASENAME) library file in /usr/lib' ; \ echo ' and the new library files are in $(LIBDIR)!' ; \ echo ' These old files must be removed or the userspace tools may fail' ; \ echo ' or have unpredictable results!' ; \ echo ' Run the following command: rm /usr/lib/$(LIBSHBASENAME)' ; \ echo '***********' ; \ fi ; \ cat /etc/ld.so.conf /etc/ld.so.conf.d/.conf 2>/dev/null | grep -q '(^|[[:space:]:,])$(LIBDIR)([[:space:]:,=]|$$)' || \ ( echo '***********' ; \ echo 'Warning: Library directory $(LIBDIR) is not in /etc/ld.so.conf!' ; \ echo ' Add it and run /sbin/ldconfig for the userspace tools to work.' ; \ echo '************' ) ; \ fi $(INSTALL) -m 644 $(LIBHEADERFILES) $(DESTDIR)$(LIBINCLUDEDIR) $(INSTALL) -m 644 $(LIBMAN3FILES) $(DESTDIR)$(LIBMAN3DIR) $(INSTALL) -m 644 $(LIBMAN5FILES) $(DESTDIR)$(LIBMAN5DIR) $(LN) sensors.conf.5 $(DESTDIR)$(LIBMAN5DIR)/sensors3.conf.5

user_install :: install-lib

user_uninstall:: $(RM) $(REMOVELIBSH) $(REMOVELNSO) $(REMOVELNBS) ifeq ($(BUILD_STATIC_LIB),1) $(RM) $(REMOVELIBST) endif $(RM) $(REMOVELIBHF) $(REMOVEMAN3) $(REMOVEMAN5)

Remove directory if empty, ignore failure

$(RMDIR) $(DESTDIR)$(LIBINCLUDEDIR) 2> /dev/null || true

clean-lib: $(RM) $(LIB_DIR)/.ld $(LIB_DIR)/.ad $(RM) $(LIB_DIR)/.lo $(LIB_DIR)/.ao $(RM) $(LIBTARGETS) $(LIBEXTRACLEAN)

old versions

$(RM) $(LIB_DIR)/$(LIBSHBASENAME).*

clean :: clean-lib