I2C library for Linux

Copyright (C) 2012 Jean Delvare jdelvare@suse.de

This program 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.

LIB_DIR := lib

LIB_CFLAGS := -Wstrict-prototypes -Wshadow -Wpointer-arith -Wcast-qual \ -Wcast-align -Wwrite-strings -Wnested-externs -Winline \ -W -Wundef -Wmissing-prototypes -Iinclude

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 only smbus.h.

LIB_MAINVER := 0 LIB_MINORVER := 1.0 LIB_VER := $(LIB_MAINVER).$(LIB_MINORVER)

The shared and static library names

LIB_SHBASENAME := libi2c.so LIB_SHSONAME := $(LIB_SHBASENAME).$(LIB_MAINVER) LIB_SHLIBNAME := $(LIB_SHBASENAME).$(LIB_VER) LIB_STLIBNAME := libi2c.a

LIB_TARGETS := $(LIB_SHLIBNAME) LIB_LINKS := $(LIB_SHSONAME) $(LIB_SHBASENAME) LIB_OBJECTS := smbus.o ifeq ($(BUILD_STATIC_LIB),1) LIB_TARGETS += $(LIB_STLIBNAME) LIB_OBJECTS += smbus.ao endif

Libraries

$(LIB_DIR)/$(LIB_SHLIBNAME): $(LIB_DIR)/smbus.o $(CC) -shared $(LDFLAGS) -Wl,--version-script=$(LIB_DIR)/libi2c.map -Wl,-soname,$(LIB_SHSONAME) -o $@ $^ -lc

$(LIB_DIR)/$(LIB_SHSONAME): $(RM) $@ $(LN) $(LIB_SHLIBNAME) $@

$(LIB_DIR)/$(LIB_SHBASENAME): $(RM) $@ $(LN) $(LIB_SHLIBNAME) $@

$(LIB_DIR)/$(LIB_STLIBNAME): $(LIB_DIR)/smbus.ao $(RM) $@ $(AR) rcvs $@ $^

Objects

Each object must be built twice, once for the shared library and

once again for the static library.

$(LIB_DIR)/smbus.o: $(LIB_DIR)/smbus.c $(INCLUDE_DIR)/i2c/smbus.h $(CC) $(SOCFLAGS) $(LIB_CFLAGS) -c $< -o $@

$(LIB_DIR)/smbus.ao: $(LIB_DIR)/smbus.c $(INCLUDE_DIR)/i2c/smbus.h $(CC) $(CFLAGS) $(LIB_CFLAGS) -c $< -o $@

Commands

all-lib: $(addprefix $(LIB_DIR)/,$(LIB_TARGETS) $(LIB_LINKS))

strip-lib: $(addprefix $(LIB_DIR)/,$(LIB_TARGETS)) strip $(addprefix $(LIB_DIR)/,$(LIB_TARGETS))

clean-lib: $(RM) $(addprefix $(LIB_DIR)/,.o .ao $(LIB_TARGETS) $(LIB_LINKS))

install-lib: $(addprefix $(LIB_DIR)/,$(LIB_TARGETS)) $(INSTALL_DIR) $(DESTDIR)$(libdir) $(INSTALL_PROGRAM) $(LIB_DIR)/$(LIB_SHLIBNAME) $(DESTDIR)$(libdir) $(LN) $(LIB_SHLIBNAME) $(DESTDIR)$(libdir)/$(LIB_SHSONAME) $(LN) $(LIB_SHSONAME) $(DESTDIR)$(libdir)/$(LIB_SHBASENAME) ifeq ($(BUILD_STATIC_LIB),1) $(INSTALL_DATA) $(LIB_DIR)/$(LIB_STLIBNAME) $(DESTDIR)$(libdir) endif

uninstall-lib: for library in $(LIB_TARGETS) $(LIB_LINKS) ; do \ $(RM) $(DESTDIR)$(libdir)/$$library ; done

all: all-lib

strip: strip-lib

clean: clean-lib

install: install-lib

uninstall: uninstall-lib