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#!-------------------------------------------------------------------------------------------------!
#! CP2K: A general program to perform molecular dynamics simulations !
#! Copyright 2000-2025 CP2K developers group <https://cp2k.org> !
#! !
#! SPDX-License-Identifier: GPL-2.0-or-later !
#!-------------------------------------------------------------------------------------------------!
# Copyright (c) 2022- ETH Zurich
#
# authors : Mathieu Taillefumier
include(FindPackageHandleStandardArgs)
include(cp2k_utils)
cp2k_set_default_paths(FFTW3 "Fftw")
# Check if we can use PkgConfig
find_package(PkgConfig)
# First try with pkg
if(PKG_CONFIG_FOUND)
pkg_search_module(CP2K_FFTW3 IMPORTED_TARGET GLOBAL fftw3)
pkg_search_module(CP2K_FFTW3F IMPORTED_TARGET GLOBAL fftw3f)
pkg_search_module(CP2K_FFTW3L IMPORTED_TARGET GLOBAL fftw3l)
pkg_search_module(CP2K_FFTW3Q IMPORTED_TARGET GLOBAL fftw3q)
endif()
foreach(_lib fftw3 fftw3f fftw3l fftw3q)
string(TOUPPER "${_lib}" __lib_up)
if(NOT CP2K_${__lib_up}_FOUND)
if(NOT ${_lib} MATCHES "fftw3")
set(CP2K_${__lib_up}_ROOT "${CP2K_FFTW3_ROOT}")
endif()
cp2k_find_libraries("${__lib_up}" "${_lib}")
if(NOT ${_lib} MATCHES "fftw3")
unset(CP2K_${__lib_up}_ROOT CACHE)
endif()
endif()
# OMP variant
foreach(_subtype "mpi" "omp" "threads")
string(TOUPPER "${_lib}_${_subtype}" _sub_lib)
set(CP2K_${_sub_lib}_ROOT "${CP2K_FFTW3_ROOT}")
cp2k_find_libraries("${_sub_lib}" "${_lib}_${_subtype}")
unset(CP2K_${_sub_lib}_ROOT CACHE)
endforeach()
endforeach()
if(NOT CP2K_FFTW3_INCLUDE_DIRS)
cp2k_include_dirs(FFTW3 "fftw3.h;fftw3/fftw3.h")
endif()
if(CP2K_FFTW3_INCLUDE_DIRS)
find_package_handle_standard_args(Fftw DEFAULT_MSG CP2K_FFTW3_INCLUDE_DIRS
CP2K_FFTW3_LINK_LIBRARIES)
else()
find_package_handle_standard_args(Fftw DEFAULT_MSG CP2K_FFTW3_LINK_LIBRARIES)
endif()
foreach(lib_name "fftw3" "fftw3l" "fftw3q" "fftw3f")
string(TOUPPER "${lib_name}" __lib_name_up)
if(CP2K_${__lib_name_up}_FOUND)
if(NOT TARGET cp2k::FFTW3::${lib_name})
add_library(cp2k::FFTW3::${lib_name} INTERFACE IMPORTED)
endif()
# we do not recheck if the libraries are found when pkg_config is
# successful.
set_target_properties(
cp2k::FFTW3::${lib_name}
PROPERTIES INTERFACE_LINK_LIBRARIES
"${CP2K_${__lib_name_up}_LINK_LIBRARIES}")
if(CP2K_FFTW3_INCLUDE_DIRS)
set_target_properties(
cp2k::FFTW3::${lib_name} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
"${CP2K_FFTW3_INCLUDE_DIRS}")
endif()
foreach(sub_type "threads" "mpi" "omp")
string(TOUPPER "${lib_name}_${sub_type}" __libs)
if(CP2K_${__libs}_FOUND)
if(NOT TARGET cp2k::FFTW3::${lib_name}_${sub_type})
add_library(cp2k::FFTW3::${lib_name}_${sub_type} INTERFACE IMPORTED)
endif()
set_target_properties(
cp2k::FFTW3::${lib_name}_${sub_type}
PROPERTIES INTERFACE_LINK_LIBRARIES
"${CP2K_${__libs}_LINK_LIBRARIES}")
endif()
endforeach()
endif()
endforeach()
set(CP2K_FFTW3_FOUND ON)
mark_as_advanced(
CP2K_FFTW3_FOUND
CP2K_FFTW3_ROOT
CP2K_FFTW3_INCLUDE_DIRS
CP2K_FFTW3_MPI
CP2K_FFTW3_OMP
CP2K_FFTW3_THREADS
CP2K_FFTW3Q_OMP
CP2K_FFTW3Q_THREADS
CP2K_FFTW3F_MPI
CP2K_FFTW3_OMP
CP2K_FFTW3F_THREADS
CP2K_FFTW3L_MPI
CP2K_FFTW3L_OMP
CP2K_FFTW3L_THREADS)
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