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# Copyright (c) 2019 ETH Zurich, Simon Frasch
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#.rst:
# FindFFTWF
# -----------
#
# This module looks for the fftw3f library.
#
# The following variables are set
#
# ::
#
# FFTWF_FOUND - True if single precision fftw library is found
# FFTWF_LIBRARIES - The required libraries
# FFTWF_INCLUDE_DIRS - The required include directory
#
# The following import target is created
#
# ::
#
# FFTWF::FFTWF
# set paths to look for library
set(_FFTWF_PATHS ${FFTW_ROOT} $ENV{FFTW_ROOT} ${FFTWF_ROOT} $ENV{FFTWF_ROOT})
set(_FFTWF_INCLUDE_PATHS)
set(_FFTWF_DEFAULT_PATH_SWITCH)
if(_FFTWF_PATHS)
# disable default paths if ROOT is set
set(_FFTWF_DEFAULT_PATH_SWITCH NO_DEFAULT_PATH)
else()
# try to detect location with pkgconfig
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
pkg_check_modules(PKG_FFTWF QUIET "fftw3")
endif()
set(_FFTWF_PATHS ${PKG_FFTWF_LIBRARY_DIRS})
set(_FFTWF_INCLUDE_PATHS ${PKG_FFTWF_INCLUDE_DIRS})
endif()
find_library(
FFTWF_LIBRARIES
NAMES "fftw3f"
HINTS ${_FFTWF_PATHS}
PATH_SUFFIXES "lib" "lib64"
${_FFTWF_DEFAULT_PATH_SWITCH}
)
find_path(FFTWF_INCLUDE_DIRS
NAMES "fftw3.h"
HINTS ${_FFTWF_PATHS} ${_FFTWF_INCLUDE_PATHS}
PATH_SUFFIXES "include" "include/fftw"
${_FFTWF_DEFAULT_PATH_SWITCH}
)
# check if found
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(FFTWF REQUIRED_VARS FFTWF_INCLUDE_DIRS FFTWF_LIBRARIES )
# add target to link against
if(FFTWF_FOUND)
if(NOT TARGET FFTWF::FFTWF)
add_library(FFTWF::FFTWF INTERFACE IMPORTED)
endif()
set_property(TARGET FFTWF::FFTWF PROPERTY INTERFACE_LINK_LIBRARIES ${FFTWF_LIBRARIES})
set_property(TARGET FFTWF::FFTWF PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${FFTWF_INCLUDE_DIRS})
endif()
# prevent clutter in cache
MARK_AS_ADVANCED(FFTWF_FOUND FFTWF_LIBRARIES FFTWF_INCLUDE_DIRS pkgcfg_lib_PKG_FFTWF_fftw3)
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