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###########################################################################
# Copyright 2015, 2016, 2017 IoT.bzh
#
# author: Fulup Ar Foll <fulup@iot.bzh>
# contrib: Romain Forlot <romain.forlot@iot.bzh>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
###########################################################################


#--------------------------------------------------------------------------
#  WARNING:
#     Do not change this cmake template
#     Customise your preferences in "./etc/config.cmake"
#--------------------------------------------------------------------------


# Generic useful macro
# -----------------------
macro(PROJECT_TARGET_ADD TARGET_NAME)
	set_property(GLOBAL APPEND PROPERTY PROJECT_TARGETS ${TARGET_NAME})
	set(TARGET_NAME ${TARGET_NAME})
endmacro(PROJECT_TARGET_ADD)

macro(PROJECT_PKGDEP_ADD PKG_NAME)
	set_property(GLOBAL APPEND PROPERTY PROJECT_PKG_DEPS ${PKG_NAME})
endmacro(PROJECT_PKGDEP_ADD)

# Check GCC minimal version version
if (gcc_minimal_version)
   message ("-- Check gcc_minimal_version (found gcc version ${CMAKE_C_COMPILER_VERSION})  (found g++ version ${CMAKE_CXX_COMPILER_VERSION})")
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${gcc_minimal_version} OR CMAKE_C_COMPILER_VERSION VERSION_LESS ${gcc_minimal_version})
    message(FATAL_ERROR "**** FATAL: Require at least gcc-${gcc_minimal_version} please set CMAKE_C[XX]_COMPILER")
endif()
endif(gcc_minimal_version)

macro(defstr name value)
	add_definitions(-D${name}=${value})
endmacro(defstr)



# Pre-packaging
macro(project_targets_populate)

        # Default Widget default directory
        set(PACKAGE_BINDIR  ${PROJECT_PKG_DIR}/bin)
        set(PACKAGE_ETCDIR  ${PROJECT_PKG_DIR}/etc)
        set(PACKAGE_LIBDIR  ${PROJECT_PKG_DIR}/lib)
        set(PACKAGE_HTTPDIR ${PROJECT_PKG_DIR}/htdocs)
        set(PACKAGE_DATADIR ${PROJECT_PKG_DIR}/data)

	add_custom_target(populate)
        get_property(PROJECT_TARGETS GLOBAL PROPERTY PROJECT_TARGETS)
	foreach(TARGET ${PROJECT_TARGETS})
		get_target_property(T ${TARGET} LABELS)
		if(T)
			# Declaration of a custom command that will populate widget tree with the target
			set(POPULE_PACKAGE_TARGET "project_populate_${TARGET}")

			get_target_property(P ${TARGET} PREFIX)
			get_target_property(BD ${TARGET} BINARY_DIR)
			get_target_property(OUT ${TARGET} OUTPUT_NAME)

			if(P MATCHES "NOTFOUND$")
				if (${T} STREQUAL "BINDING")
					set(P "lib")
				else()
					set(P "")
				endif()
			endif()

			if(${T} STREQUAL "BINDING")
				add_custom_command(OUTPUT ${PACKAGE_LIBDIR}/${P}${TARGET}.so
					DEPENDS ${TARGET}
					COMMAND mkdir -p ${PACKAGE_LIBDIR}
					COMMAND cp ${BD}/${P}${OUT}.so ${PACKAGE_LIBDIR}
				)
				add_custom_target(${POPULE_PACKAGE_TARGET} DEPENDS ${PACKAGE_LIBDIR}/${P}${TARGET}.so)
				add_dependencies(populate ${POPULE_PACKAGE_TARGET}) 
			elseif(${T} STREQUAL "EXECUTABLE")
				add_custom_command(OUTPUT ${PACKAGE_BINDIR}/${P}${TARGET}
					DEPENDS ${TARGET}
					COMMAND mkdir -p ${PACKAGE_BINDIR}
					COMMAND cp ${BD}/${P}${OUT} ${PACKAGE_BINDIR}
				)
				add_custom_target(${POPULE_PACKAGE_TARGET} DEPENDS ${PACKAGE_BINDIR}/${P}${TARGET})
				add_dependencies(populate ${POPULE_PACKAGE_TARGET}) 
			elseif(${T} STREQUAL "HTDOCS")
				add_custom_command(OUTPUT ${PACKAGE_HTTPDIR}
					DEPENDS ${TARGET}
					COMMAND cp -r ${BD}/${P}${OUT} ${PACKAGE_HTTPDIR}
					)
					add_custom_target(${POPULE_PACKAGE_TARGET} DEPENDS ${PACKAGE_HTTPDIR})
					add_dependencies(populate ${POPULE_PACKAGE_TARGET}) 
			elseif(${T} STREQUAL "DATA")
				add_custom_command(OUTPUT ${PACKAGE_DATADIR}
					DEPENDS ${TARGET}
					COMMAND cp -r ${BD}/${P}${OUT} ${PACKAGE_DATADIR}
					)
					add_custom_target(${POPULE_PACKAGE_TARGET} DEPENDS ${PACKAGE_HTTPDIR})
					add_dependencies(populate ${POPULE_PACKAGE_TARGET}) 
			endif(${T} STREQUAL "BINDING")
		elseif(${CMAKE_BUILD_TYPE} MATCHES "[Dd][Ee][Bb][Uu][Gg]")
			MESSAGE(".. Warning: ${TARGET} ignored when packaging.")
		endif()
	endforeach()
endmacro(project_targets_populate)


macro(wgt_package_build)
        if(NOT EXISTS ${WGT_TEMPLATE_DIR}/config.xml.in OR NOT EXISTS ${WGT_TEMPLATE_DIR}/${PROJECT_ICON}.in)
                MESSAGE(FATAL_ERROR "Missing mandatory files: you need config.xml.in and ${PROJECT_ICON}.in files in ${WGT_TEMPLATE_DIR} folder.")
        endif()

        # Build widget spec file from template only once (Fulup good idea or should depend on time ????)
        if(NOT EXISTS ${PROJECT_PKG_DIR}/config.xml.in OR NOT EXISTS ${PROJECT_PKG_DIR}/${PROJECT_ICON}.in)
                configure_file(${WGT_TEMPLATE_DIR}/config.xml.in ${PROJECT_PKG_DIR}/config.xml)
                file(COPY ${WGT_TEMPLATE_DIR}/${PROJECT_ICON}.in DESTINATION ${PROJECT_PKG_DIR}/${PROJECT_ICON})
        endif(NOT EXISTS ${PROJECT_PKG_DIR}/config.xml.in OR NOT EXISTS ${PROJECT_PKG_DIR}/${PROJECT_ICON}.in)

        # Fulup ??? copy any extra file in wgt/etc into populate package before building the widget
        file(GLOB PROJECT_CONF_FILES "${WGT_TEMPLATE_DIR}/etc/*")
        if(${PROJECT_CONF_FILES})
                file(COPY "${WGT_TEMPLATE_DIR}/etc/*" DESTINATION ${PROJECT_PKG_DIR}/etc/)
        endif(${PROJECT_CONF_FILES})

        add_custom_command(OUTPUT ${PROJECT_NAME}.wgt
                DEPENDS ${PROJECT_TARGETS}
                COMMAND wgtpkg-pack -f -o ${PROJECT_NAME}.wgt ${PROJECT_PKG_DIR}
        )

        add_custom_target(widget DEPENDS ${PROJECT_NAME}.wgt)
        add_dependencies(widget populate)
        set(ADDITIONAL_MAKE_CLEAN_FILES, "${PROJECT_NAME}.wgt")

        if(PACKAGE_MESSAGE)
        add_custom_command(TARGET widget
                POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --cyan "++ ${PACKAGE_MESSAGE}")
        endif()
endmacro(wgt_package_build)

macro(rpm_package_build)
        if(NOT EXISTS ${RPM_TEMPLATE_DIR}/config.rpm.in)
                MESSAGE(FATAL_ERROR "Missing mandatory files: you needconfig.rpm.in in ${RPM_TEMPLATE_DIR} folder.")
        endif()
     
        # extract PROJECT_PKG_DEPS and replace ; by , for RPM spec file
        get_property(PROJECT_PKG_DEPS GLOBAL PROPERTY PROJECT_PKG_DEPS)
        foreach (PKFCONF ${PROJECT_PKG_DEPS})
          set(RPM_PKG_DEPS "${RPM_PKG_DEPS}, pkgconfig(${PKFCONF})")
        endforeach()

        # build rpm spec file from template
        configure_file(${RPM_TEMPLATE_DIR}/config.rpm.in ${PROJECT_PKG_DIR}/config.rpm)

        add_custom_command(OUTPUT ${PROJECT_NAME}.rpm
                DEPENDS ${PROJECT_TARGETS}
                COMMAND rpmbuild -ba  ${PROJECT_PKG_DIR}/config.rpm
        )

        add_custom_target(rpm DEPENDS ${PROJECT_NAME}.rpm)
        add_dependencies(rpm populate)
        set(ADDITIONAL_MAKE_CLEAN_FILES, "${PROJECT_NAME}.rpm")

        if(PACKAGE_MESSAGE)
        add_custom_command(TARGET rpm
                POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --cyan "++ ${PACKAGE_MESSAGE}")
        endif()
endmacro(rpm_package_build)

macro(project_package_build)

    if(EXISTS ${RPM_TEMPLATE_DIR})
        rpm_package_build()
    endif()

    if(EXISTS ${WGT_TEMPLATE_DIR})
        wgt_package_build()
    endif()

    if(EXISTS ${DEB_TEMPLATE_DIR})
        deb_package_build()
    endif()

endmacro(project_package_build)


macro(project_subdirs_add)
	if(${ARGV0})
		file(GLOB filelist "${ARGV0}")
	else()
		file(GLOB filelist "*")
	endif(${ARGV0})

	foreach(filename ${filelist})
		if(EXISTS "${filename}/CMakeLists.txt")
			add_subdirectory(${filename})
		endif(EXISTS "${filename}/CMakeLists.txt")
	endforeach()
endmacro(project_subdirs_add)

set(CMAKE_BUILD_TYPE Debug CACHE STRING "the type of build")
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(CMP0048 1)

# Include project configuration
# ------------------------------
project(${PROJECT_NAME} VERSION ${PROJECT_VERSION} LANGUAGES ${PROJECT_LANGUAGES})
set(PROJECT_PKG_DIR    "pkgs" CACHE PATH "Subpath to packages")
set(PROJECT_LIB_DIR    "libs" CACHE PATH "Subpath to libraries")
set(PROJECT_RESOURCES "data"  CACHE PATH "Subpath to data")

INCLUDE(FindPkgConfig)
INCLUDE(CheckIncludeFiles)
INCLUDE(CheckLibraryExists)
INCLUDE(GNUInstallDirs)

# Default compilation options
############################################################################
link_libraries(-Wl,--as-needed -Wl,--gc-sections)
add_compile_options(-Wall -Wextra -Wconversion)
add_compile_options(-Wno-unused-parameter) # frankly not using a parameter does it care?
add_compile_options(-Wno-sign-compare -Wno-sign-conversion)
add_compile_options(-Werror=maybe-uninitialized)
add_compile_options(-Werror=implicit-function-declaration)
add_compile_options(-ffunction-sections -fdata-sections)
add_compile_options(-fPIC)
add_compile_options(-g)

set(CMAKE_C_FLAGS_PROFILING   "-g -O2 -pg -Wp,-U_FORTIFY_SOURCE" CACHE STRING "Flags for profiling")
set(CMAKE_C_FLAGS_DEBUG       "-g -O2 -ggdb -Wp,-U_FORTIFY_SOURCE" CACHE STRING "Flags for debugging")
set(CMAKE_C_FLAGS_RELEASE     "-O2" CACHE STRING "Flags for releasing")
set(CMAKE_C_FLAGS_CCOV        "-g -O2 --coverage" CACHE STRING "Flags for coverage test")

set(CMAKE_CXX_FLAGS_PROFILING    "-g -O0 -pg -Wp,-U_FORTIFY_SOURCE")
set(CMAKE_CXX_FLAGS_DEBUG        "-g -O0 -ggdb -Wp,-U_FORTIFY_SOURCE")
set(CMAKE_CXX_FLAGS_RELEASE      "-g -O2")
set(CMAKE_CXX_FLAGS_CCOV "-g -O2 --coverage")

set(CMAKE_INSTALL_PREFIX      "${CMAKE_SOURCE_DIR}/Install" CACHE PATH "The path where to install")

# (BUG!!!) as PKG_CONFIG_PATH does not work [should be en env variable]
set(PKG_CONFIG_USE_CMAKE_PREFIX_PATH ON CACHE BOOLEAN "Flag for using prefix path")

# Loop on required package and add options
foreach (PKG_CONFIG ${PKG_REQUIRED_LIST})
	PKG_CHECK_MODULES(${PKG_CONFIG} REQUIRED ${PKG_CONFIG})

	INCLUDE_DIRECTORIES(${${PKG_CONFIG}_INCLUDE_DIRS})
	list (APPEND link_libraries ${${PKG_CONFIG}_LIBRARIES})
	add_compile_options (${${PKG_CONFIG}_CFLAGS})

        PROJECT_PKGDEP_ADD(${PKG_CONFIG})
endforeach(PKG_CONFIG)

# Optional LibEfence Malloc debug library
IF(CMAKE_BUILD_TYPE MATCHES DEBUG)
CHECK_LIBRARY_EXISTS(efence malloc "" HAVE_LIBEFENCE)
IF(HAVE_LIBEFENCE)
	MESSAGE(STATUS "Linking with ElectricFence for debugging purposes...")
	SET(libefence_LIBRARIES "-lefence")
	list (APPEND link_libraries ${libefence_LIBRARIES})
ENDIF(HAVE_LIBEFENCE)
ENDIF(CMAKE_BUILD_TYPE MATCHES DEBUG)

# set default include directories
INCLUDE_DIRECTORIES(${EXTRA_INCLUDE_DIRS})

# If no install dir try to guess some smart default
if(BINDINGS_INSTALL_PREFIX)
	set(BINDINGS_INSTALL_DIR ${BINDINGS_INSTALL_PREFIX}/${PROJECT_NAME})
else()
	set(BINDINGS_INSTALL_DIR ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME})
endif()

# Define a default widget directory
set (PKG_TEMPLATE_PREFIX ${CMAKE_SOURCE_DIR}/etc CACHE PATH "Default Package Templates Directory")
set(WGT_TEMPLATE_DIR ${PKG_TEMPLATE_PREFIX}/wgt)
set(RPM_TEMPLATE_DIR ${PKG_TEMPLATE_PREFIX}/rpm)
set(DEB_TEMPLATE_DIR ${PKG_TEMPLATE_PREFIX}/deb)


# Default Linkflag
if(NOT BINDINGS_LINK_FLAG)
	set(BINDINGS_LINK_FLAG "-Wl,--version-script=${CMAKE_SOURCE_DIR}/etc/export.map")
endif()

# Add a dummy target to enable global dependency order
# -----------------------------------------------------
if(EXTRA_DEPENDENCIES_ORDER)
	set(DEPENDENCIES_TARGET ${PROJECT_NAME}_extra_dependencies)
	add_custom_target(${DEPENDENCIES_TARGET} ALL
		DEPENDS ${EXTRA_DEPENDENCY_ORDER}
	)
endif()

# Print developer helper message when build is done
# -------------------------------------------------------
macro(project_closing_msg)
        get_property(PROJECT_TARGETS GLOBAL PROPERTY PROJECT_TARGETS)
	if(CLOSING_MESSAGE AND PROJECT_TARGETS)
		add_custom_target(${PROJECT_NAME}_build_done ALL
			COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --cyan "++ ${CLOSING_MESSAGE}"
		)
		 add_dependencies(${PROJECT_NAME}_build_done
		 	${DEPENDENCIES_TARGET} ${PROJECT_TARGETS})
	endif()
endmacro()