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# SPDX-FileCopyrightText: 2016-2017 Pino Toscano <pino@kde.org>
#
# SPDX-License-Identifier: BSD-3-Clause
#
# Adapted from https://invent.kde.org/frameworks/extra-cmake-modules/-/blob/master/find-modules/FindGperf.cmake?ref_type=heads
#
find_program(Gperf_EXECUTABLE NAMES gperf)
if (Gperf_EXECUTABLE)
execute_process(COMMAND ${Gperf_EXECUTABLE} -v
OUTPUT_VARIABLE _version_string
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE)
if(_version_string MATCHES "^GNU gperf ([-0-9\\.]+)")
set(Gperf_VERSION "${CMAKE_MATCH_1}")
endif()
unset(_version_string)
else()
set(Gperf_VERSION)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Gperf
FOUND_VAR
Gperf_FOUND
REQUIRED_VARS
Gperf_EXECUTABLE
VERSION_VAR
Gperf_VERSION
)
if (Gperf_FOUND)
if (NOT TARGET GPerf::Gperf)
add_executable(GPerf::Gperf IMPORTED)
set_target_properties(GPerf::Gperf PROPERTIES
IMPORTED_LOCATION "${Gperf_EXECUTABLE}"
)
endif()
endif()
function(gperf_generate input_file output_file _target_or_sources_var)
# Parse arguments
set(oneValueArgs GENERATION_FLAGS)
cmake_parse_arguments(ARGS "" "${oneValueArgs}" "" ${ARGN})
if(ARGS_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "Unknown keywords given to gperf_generate(): \"${ARGS_UNPARSED_ARGUMENTS}\"")
endif()
if (TARGET ${_target_or_sources_var})
get_target_property(aliased_target ${_target_or_sources_var} ALIASED_TARGET)
if(aliased_target)
message(FATAL_ERROR "Target argument passed to gperf_generate must not be an alias: ${_target_or_sources_var}")
endif()
endif()
get_filename_component(_infile ${input_file} ABSOLUTE)
set(_extraopts "${ARGS_GENERATION_FLAGS}")
separate_arguments(_extraopts)
add_custom_command(OUTPUT ${output_file}
COMMAND ${Gperf_EXECUTABLE} ${_extraopts} --output-file=${output_file} ${_infile}
DEPENDS ${_infile}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
VERBATIM
)
set_property(SOURCE ${output_file} PROPERTY SKIP_AUTOMOC ON)
if (TARGET ${_target_or_sources_var})
target_sources(${_target_or_sources_var} PRIVATE ${output_file})
else()
set(${_target_or_sources_var} ${${_target_or_sources_var}} ${output_file} PARENT_SCOPE)
endif()
endfunction()
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