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# Helper macros for dealing with device backends.
# SPDX-FileCopyrightText: 2019 Pino Toscano <pino@kde.org>
#
# SPDX-License-Identifier: BSD-3-Clause
# "Begin" the device backends addition, to be called *before* all the order
# add_device_backend* macros
macro(add_device_backends_begin)
set(ENABLED_DEVICE_BACKENDS)
endmacro()
# Macro to add a new device backend; a new cmake option is automatically added
# to disable the build of that backend, available as
# BUILD_DEVICE_BACKEND_$name.
macro(add_device_backend backend)
_add_device_backend(${backend} "${CMAKE_CURRENT_SOURCE_DIR}")
endmacro()
# Internal implementation of add_device_backend, mostly to pass the right
# source directory (in case of a function is the file containing that
# function).
function(_add_device_backend backend source_dir)
set(cmakelists_path "${source_dir}/src/solid/devices/backends/${backend}/CMakeLists.txt")
if(NOT (EXISTS "${cmakelists_path}"))
message(FATAL_ERROR "Missing CMakeLists.txt for backend ${backend}")
endif()
option(BUILD_DEVICE_BACKEND_${backend} "Build the backend ${backend}" ON)
if(NOT BUILD_DEVICE_BACKEND_${backend})
return()
endif()
set(backends ${ENABLED_DEVICE_BACKENDS})
list(APPEND backends ${backend})
set(ENABLED_DEVICE_BACKENDS ${backends} PARENT_SCOPE)
endfunction()
# After all the add_device_backend()s are called, create all the cmake
# material:
# - the BUILD_DEVICE_BACKEND_$name cmake variables, used to conditionally
# add stuff depending whether a backend is built
# - a feature info, to show that that backend was enabled
macro(add_device_backends_cmake)
foreach(backend ${ENABLED_DEVICE_BACKENDS})
set(BUILD_DEVICE_BACKEND_${backend} TRUE)
add_feature_info(${backend} TRUE "Solid device '${backend}' backend.")
endforeach()
endmacro()
# After all the add_device_backend()s are called, create/collect all the
# material used for the build:
# - create a config-backends.h file in the current binary directory, with
# BUILD_DEVICE_BACKEND_$name defines for all the built backends
# - fill the sources_var, and libs_var variables resp. with the sources,
# and the libraries needed for all the built backends
macro(add_device_backends_build base_backends_dir sources_var libs_var)
foreach(backend ${ENABLED_DEVICE_BACKENDS})
string(APPEND config_backends_output "#define BUILD_DEVICE_BACKEND_${backend} 1\n")
unset(backend_sources)
unset(backend_libs)
include("${base_backends_dir}/${backend}/CMakeLists.txt")
foreach(source ${backend_sources})
if(NOT (IS_ABSOLUTE ${source}))
set(source "${base_backends_dir}/${backend}/${source}")
endif()
list(APPEND ${sources_var} "${source}")
endforeach()
list(APPEND ${libs_var} ${backend_libs})
endforeach()
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/config-backends-tmp.h" "${config_backends_output}")
configure_file("${CMAKE_CURRENT_BINARY_DIR}/config-backends-tmp.h"
"${CMAKE_CURRENT_BINARY_DIR}/config-backends.h" COPYONLY)
set_source_files_properties("${CMAKE_CURRENT_BINARY_DIR}/config-backends-tmp.h"
"${CMAKE_CURRENT_BINARY_DIR}/config-backends.h"
PROPERTIES SKIP_AUTOGEN TRUE)
endmacro()
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