CMakeLists.txt

# Project name
project( RpiHw )

# Set the minimum required version of CMake
cmake_minimum_required( VERSION 2.6 )

# Set the version of the library
set( RPI_HW_VERSION_MAJOR	0 )
set( RPI_HW_VERSION_MINOR	7 )
set( RPI_HW_VERSION_PATCH	3 )
set( RPI_HW_VERSION			"${RPI_HW_VERSION_MAJOR}.${RPI_HW_VERSION_MINOR}.${RPI_HW_VERSION_PATCH}" )

# Project directories
set( RPI_HW_DIR					${PROJECT_SOURCE_DIR}	)
set( RPI_HW_SOURCE_DIR 			${RPI_HW_DIR}/src		)
set( RPI_HW_INCLUDE_DIR			${RPI_HW_DIR}/include	)
set( RPI_HW_LIBRARY_DIR			${RPI_HW_DIR}/lib		)
set( RPI_HW_BUILD_DIR 			${RPI_HW_DIR}/build		)
set( RPI_HW_DOXYGEN_DIR 		${RPI_HW_DIR}/doxygen	)
set( RPI_HW_CMAKE_DIR 			${RPI_HW_DIR}/cmake		)
set( RPI_HW_PKGCONFIG_DIR 		${RPI_HW_DIR}/pkgconfig	)

# Set the output directories
set( LIBRARY_OUTPUT_PATH		${RPI_HW_BUILD_DIR} )
set( EXECUTABLE_OUTPUT_PATH		${RPI_HW_BUILD_DIR} )

# Set the CMake's module path
set( CMAKE_MODULE_PATH	${CMAKE_MODULE_PATH} ${RPI_HW_DIR}/cmake )
set( CMAKE_MODULES		"" )

# Pkg-config's flags and libs
set( PKG_CONFIG_CFLAGS	"-I${CMAKE_INSTALL_PREFIX}/include -std=c++11" )
set( PKG_CONFIG_LIBS	"-L${CMAKE_INSTALL_PREFIX}/lib -lrpihw ${CMAKE_THREAD_LIBS_INIT} -lrt" )

# Define some options
option( USE_FREETYPE	"Use FreeType library"			ON )
option( USE_MAGICK		"Use GraphicsMagick++ library"	ON )

# Set the compiler flags
add_definitions( -Wall -ansi -pedantic -pedantic-errors -mfloat-abi=hard -O2 -std=c++11 -Wno-long-long ) # -Wno-psabi

# Set the include directories
include_directories( ${RPI_HW_INCLUDE_DIR} )

# Remove temporary files
execute_process( COMMAND ${CMAKE_COMMAND} -E remove "${RPI_HW_DIR}/install_directories.txt" )


# Include some external functions
include( ${RPI_HW_CMAKE_DIR}/functions.cmake )

# Check if RPi's Revision has been specified by user
if ( RPI_REVISION )
	message( "-- Using Raspberry Pi Revision Number: ${RPI_REVISION}" )
else()
	# Find it with an automated script
	findRpiRevision( RPI_REVISION )
endif()


# Find some dependencies
find_package( Threads REQUIRED )


# Enable/disable FreeType support
if ( USE_FREETYPE )
	find_package( Freetype REQUIRED )
	include_directories( ${FREETYPE_INCLUDE_DIRS} )

	set( CMAKE_MODULES ${CMAKE_MODULES} Freetype )

	addPkgConfigCflags( PKG_CONFIG_CFLAGS "${FREETYPE_INCLUDE_DIRS}" )
	addPkgConfigLibs( PKG_CONFIG_LIBS "${FREETYPE_LIBRARIES}" )

	set( USE_FREETYPE 1 )
else()
	set( USE_FREETYPE 0 )
endif()


# Enable/disable GraphicsMagick++ support
if ( USE_MAGICK )
	find_package( GraphicsMagick++ REQUIRED )
	include_directories( ${GraphicsMagick++_INCLUDE_DIRS} )

	set( CMAKE_MODULES ${CMAKE_MODULES} GraphicsMagick++ )

	execute_process( COMMAND GraphicsMagick++-config --cppflags OUTPUT_VARIABLE	GraphicsMagick++_CFLAGS )
	string( REGEX REPLACE "(.+)?\n" "\\1" GraphicsMagick++_CFLAGS ${GraphicsMagick++_CFLAGS} )
	list( APPEND PKG_CONFIG_CFLAGS ${GraphicsMagick++_CFLAGS} )

	execute_process( COMMAND GraphicsMagick++-config --libs OUTPUT_VARIABLE	GraphicsMagick++_LIBS )
	string( REGEX REPLACE "(.+)?\n" "\\1" GraphicsMagick++_LIBS ${GraphicsMagick++_LIBS} )
	list( APPEND PKG_CONFIG_LIBS ${GraphicsMagick++_LIBS} )

	set( USE_MAGICK 1 )
else()
	set( USE_MAGICK 0 )
endif()


list( REMOVE_DUPLICATES PKG_CONFIG_CFLAGS )
join( PKG_CONFIG_CFLAGS "${PKG_CONFIG_CFLAGS}" )

list( REMOVE_DUPLICATES PKG_CONFIG_LIBS )
join( PKG_CONFIG_LIBS "${PKG_CONFIG_LIBS}" )


# Define the list of files to be built dynamically
configure_file(

	${RPI_HW_INCLUDE_DIR}/rpi-hw/version.hpp.in
	${RPI_HW_INCLUDE_DIR}/rpi-hw/version.hpp
	IMMEDIATE @ONLY
)

configure_file(

	${RPI_HW_INCLUDE_DIR}/rpi-hw/config.hpp.in
	${RPI_HW_INCLUDE_DIR}/rpi-hw/config.hpp
	IMMEDIATE @ONLY
)

configure_file(

	${RPI_HW_INCLUDE_DIR}/rpi-hw/rpi.hpp.in
	${RPI_HW_INCLUDE_DIR}/rpi-hw/rpi.hpp
	IMMEDIATE @ONLY
)

configure_file(

	${RPI_HW_PKGCONFIG_DIR}/rpi-hw.pc.in
	${RPI_HW_PKGCONFIG_DIR}/rpi-hw.pc
	IMMEDIATE @ONLY
)

configure_file(

	${RPI_HW_DOXYGEN_DIR}/doxy.conf.in
	${RPI_HW_DOXYGEN_DIR}/doxy.conf
	IMMEDIATE @ONLY
)

configure_file(

	${RPI_HW_DIR}/cmake/uninstall.cmake.in
	${RPI_HW_DIR}/cmake/uninstall.cmake
	IMMEDIATE @ONLY
)

# Build the library
add_library( rpihw SHARED

	${RPI_HW_SOURCE_DIR}/utils.cpp
	${RPI_HW_SOURCE_DIR}/time.cpp

	${RPI_HW_SOURCE_DIR}/gpio.cpp

	${RPI_HW_SOURCE_DIR}/driver/bcm2835.cpp
	${RPI_HW_SOURCE_DIR}/driver/spi.cpp
	${RPI_HW_SOURCE_DIR}/driver/i2c.cpp
	${RPI_HW_SOURCE_DIR}/driver/io-expander.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23x08.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23008.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23s08.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23x17.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23017.cpp
	${RPI_HW_SOURCE_DIR}/driver/mcp23s17.cpp

	${RPI_HW_SOURCE_DIR}/iface/base.cpp
	${RPI_HW_SOURCE_DIR}/iface/output.cpp
	${RPI_HW_SOURCE_DIR}/iface/input.cpp
	${RPI_HW_SOURCE_DIR}/iface/shift-base.cpp
	${RPI_HW_SOURCE_DIR}/iface/shift-out.cpp
	${RPI_HW_SOURCE_DIR}/iface/shift-in.cpp
	${RPI_HW_SOURCE_DIR}/iface/encoder-out.cpp
	${RPI_HW_SOURCE_DIR}/iface/encoder-in.cpp
	${RPI_HW_SOURCE_DIR}/iface/decoder-out.cpp
	${RPI_HW_SOURCE_DIR}/iface/decoder-in.cpp

	${RPI_HW_SOURCE_DIR}/font/freetype.cpp

	${RPI_HW_SOURCE_DIR}/keypad/base.cpp
	${RPI_HW_SOURCE_DIR}/keypad/matrix.cpp

	${RPI_HW_SOURCE_DIR}/display/s7seg.cpp
	${RPI_HW_SOURCE_DIR}/display/m7seg.cpp
	${RPI_HW_SOURCE_DIR}/display/hd44780.cpp
	${RPI_HW_SOURCE_DIR}/display/pcd8544.cpp

	${RPI_HW_SOURCE_DIR}/motor/stepper.cpp

	${RPI_HW_SOURCE_DIR}/sensor/hcsr04.cpp
)


# Link external libraries
target_link_libraries( rpihw ${CMAKE_THREAD_LIBS_INIT} )
target_link_libraries( rpihw rt )

if ( USE_FREETYPE )
	target_link_libraries( rpihw ${FREETYPE_LIBRARIES} )
endif()

if ( USE_MAGICK )
	target_link_libraries( rpihw ${GraphicsMagick++_LIBRARIES} )
endif()


# If Doxygen was found, define the function `make doc` to build the local documentation
find_package( Doxygen )

if ( DOXYGEN_FOUND )
	add_custom_target( doc COMMAND doxygen doxygen/doxy.conf )
	add_custom_target( doc-clean COMMAND rm -R "${RPI_HW_DIR}/doc" )
endif()


# Define the library installer
install_targets( /lib rpihw )

install( FILES			${RPI_HW_INCLUDE_DIR}/rpi-hw.hpp
		 DESTINATION	${CMAKE_INSTALL_PREFIX}/include )

install( DIRECTORY		${RPI_HW_INCLUDE_DIR}/rpi-hw
		 DESTINATION	${CMAKE_INSTALL_PREFIX}/include
		 FILES_MATCHING
		 PATTERN "*"
		 PATTERN "*.in" EXCLUDE )

# Define the pkg-config installer
install( FILES			${RPI_HW_PKGCONFIG_DIR}/rpi-hw.pc
		 DESTINATION	${CMAKE_INSTALL_PREFIX}/lib/pkgconfig )

# Define the CMake's modules installer
install( FILES			${RPI_HW_CMAKE_DIR}/FindRpiHw.cmake
		 DESTINATION	${CMAKE_ROOT}/Modules/ )

foreach ( module ${CMAKE_MODULES} )
	if ( NOT EXISTS "${CMAKE_ROOT}/Modules/Find${module}.cmake" )
		install( FILES			${RPI_HW_CMAKE_DIR}/Find${module}.cmake
				 DESTINATION	${CMAKE_ROOT}/Modules/ )
	endif()
endforeach()


# Store the library paths
file( APPEND "${RPI_HW_DIR}/install_directories.txt"

	"${CMAKE_INSTALL_PREFIX}/include/rpi-hw\n"
	"${CMAKE_INSTALL_PREFIX}/share/doc/rpi-hw\n"
)

# Define the unistaller command
add_custom_target( uninstall COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake/uninstall.cmake )