Makefile.in

# Inter-Integrated Circuit (I2C) Library for the Raspberry Pi
#
# Copyright (c) 2021 Benjamin Spencer
# ============================================================================
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
# =============================================================================

# Compiler:
CC := gcc

# Versioning:
CUR := 0
REV := 0
AGE := 0

# Target shared library soname:
TARGET := libpii2c.so

# Header file
HEADER := pi_i2c.h

# Root directories:
ROOT := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))

# Directories:
SRCDIR     := $(ROOT)/src
INCDIR     := $(ROOT)/include
BUILDDIR   := $(ROOT)/obj
TARGETDIR  := $(ROOT)/bin
LIBDESTDIR := $(PREFIX)/lib
INCDESTDIR := $(PREFIX)/include
SRCSUBDIR  := $(shell find $(SRCDIR) -type d)

# Extensions:
SRCEXT := c
DEPEXT := d
OBJEXT := o

# Flags, Libraries and Includes:
CFLAGS   := -fPIC -Wall -Wextra -O2 $(DEBUG_SYM) # C flags
LDFLAGS  := -shared

LIB     :=
INC     := -I$(INCDIR) $(addprefix -I,$(SRCSUBDIR))
INCDEP  := -I$(INCDIR) $(addprefix -I,$(SRCSUBDIR))

MACRO := $(DEBUG_LOG)

# Find source and object files:
SOURCES := $(shell find $(SRCDIR) -type f -name "*.$(SRCEXT)")
OBJECTS := $(patsubst $(SRCDIR)/%,$(BUILDDIR)/%,\
	$(SOURCES:.$(SRCEXT)=.$(OBJEXT)))

# -------------------------------------------------------------------------- #
# Rules (DO NOT EDIT)
# -------------------------------------------------------------------------- #

# Default make:
all: $(TARGET).$(CUR).$(REV).$(AGE)

# Remake:
remake: clean all

# Make the directories
directories:
	@mkdir -p $(TARGETDIR)
	@mkdir -p $(BUILDDIR)

# Clean target and object files:
clean:
	@rm -rf $(BUILDDIR)/* $(TARGETDIR)/*

# Pull in dependency info for *existing* .o files:
-include $(OBJECTS:.$(OBJEXT)=.$(DEPEXT))

# Link:
$(TARGET).$(CUR).$(REV).$(AGE): $(OBJECTS)
	@mkdir -p $(TARGETDIR)
	$(CC) -o $(TARGETDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $^ $(LIB) $(CFLAGS) $(LDFLAGS)

# Compile:
$(BUILDDIR)/%.$(OBJEXT): $(SRCDIR)/%.$(SRCEXT)
	@mkdir -p $(dir $@)
	$(CC) $(CFLAGS) $(INC) -Wall $(MACRO) -c -o $@ $<
	@$(CC) $(CFLAGS) $(INCDEP) -MM $(SRCDIR)/$*.$(SRCEXT) > \
		$(BUILDDIR)/$*.$(DEPEXT)
	@cp -f $(BUILDDIR)/$*.$(DEPEXT) $(BUILDDIR)/$*.$(DEPEXT).tmp
	@sed -e 's|.*:|$(BUILDDIR)/$*.$(OBJEXT):|' \
		< $(BUILDDIR)/$*.$(DEPEXT).tmp > $(BUILDDIR)/$*.$(DEPEXT)
	@sed -e 's/.*://' -e 's/\\$$//' < $(BUILDDIR)/$*.$(DEPEXT).tmp \
		| fmt -1 | sed -e 's/^ *//' -e 's/$$/:/' >> $(BUILDDIR)/$*.$(DEPEXT)
	@rm -f $(BUILDDIR)/$*.$(DEPEXT).tmp

# Install libary and header file:
install:
	@echo "Installing library to $(LIBDESTDIR)"
	@echo "cp $(TARGETDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE)"
	@cp $(TARGETDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE)
	
	@echo "Creating symbolic link $(TARGET)"
	@echo "ln -sf $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET)"
	@ln -sf $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET)
	
	@echo "Configuring dynamic linker run-time bindings"
	@echo "ldconfig -v -n $(LIBDESTDIR)/"
	@ldconfig -v -n $(LIBDESTDIR)/
	@ldconfig

	@echo "Copying header file to $(INCDESTDIR)"
	@echo "cp $(INCDIR)/$(HEADER) $(INCDESTDIR)/$(HEADER)"
	@cp $(INCDIR)/$(HEADER) $(INCDESTDIR)/$(HEADER)

	@echo "Installing Python library"
	@echo "pip3 install python/"
	@pip3 install python/

# Uninstall libary and header file:
uninstall:
	@echo "Removing installed library at $(LIBDESTDIR)"
	@echo "Removing installed header files at $(INCDESTDIR)"
	@echo "rm -rf $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET) $(INCDESTDIR)/$(HEADER)"
	@rm -rf $(LIBDESTDIR)/$(TARGET).$(CUR).$(REV).$(AGE) $(LIBDESTDIR)/$(TARGET) $(INCDESTDIR)/$(HEADER)
	
	@echo "Configuring dynamic linker run-time bindings"
	@echo "ldconfig -n $(LIBDESTDIR)"
	@ldconfig -n $(LIBDESTDIR)

	@echo "Uninstalling Python library"
	@echo "pip3 uninstall pi_i2c"
	@pip3 uninstall -y pi_i2c

# Non-file targets:
.PHONY: all remake clean install uninstall