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# - Find the FFTW library
#
# Usage:
# find_package(FFTW [REQUIRED] [QUIET] )
#
# It sets the following variables:
# FFTW_FOUND ... true if fftw is found on the system
# FFTW_LIBRARIES ... full path to fftw library
# FFTW_INCLUDES ... fftw include directory
#
# The following variables will be checked by the function
# FFTW_USE_STATIC_LIBS ... if true, only static libraries are found
# FFTW_ROOT ... if set, the libraries are exclusively searched
# under this path
# FFTW_LIBRARY ... fftw library to use
# FFTW_INCLUDE_DIR ... fftw include directory
#
#If environment variable FFTWDIR is specified, it has same effect as FFTW_ROOT
if( NOT FFTW_ROOT AND ENV{FFTWDIR} )
set( FFTW_ROOT $ENV{FFTWDIR} )
endif()
# Check if we can use PkgConfig
find_package(PkgConfig)
#Determine from PKG
if( PKG_CONFIG_FOUND AND NOT FFTW_ROOT )
pkg_check_modules( PKG_FFTW QUIET "fftw3" )
endif()
#Check whether to search static or dynamic libs
set( CMAKE_FIND_LIBRARY_SUFFIXES_SAV ${CMAKE_FIND_LIBRARY_SUFFIXES} )
if( ${FFTW_USE_STATIC_LIBS} )
set( CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX} )
else()
set( CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_SHARED_LIBRARY_SUFFIX} )
endif()
if( FFTW_ROOT )
#find libs
find_library(
FFTW_LIB
NAMES "fftw3"
PATHS ${FFTW_ROOT}
PATH_SUFFIXES "lib" "lib64"
NO_DEFAULT_PATH
)
find_library(
FFTWF_LIB
NAMES "fftw3f"
PATHS ${FFTW_ROOT}
PATH_SUFFIXES "lib" "lib64"
NO_DEFAULT_PATH
)
find_library(
FFTWL_LIB
NAMES "fftw3l"
PATHS ${FFTW_ROOT}
PATH_SUFFIXES "lib" "lib64"
NO_DEFAULT_PATH
)
#find includes
find_path(
FFTW_INCLUDES
NAMES "fftw3.h"
PATHS ${FFTW_ROOT}
PATH_SUFFIXES "include"
NO_DEFAULT_PATH
)
else()
find_library(
FFTW_LIB
NAMES "fftw3"
PATHS ${PKG_FFTW_LIBRARY_DIRS} ${LIB_INSTALL_DIR}
)
find_library(
FFTWF_LIB
NAMES "fftw3f"
PATHS ${PKG_FFTW_LIBRARY_DIRS} ${LIB_INSTALL_DIR}
)
find_library(
FFTWL_LIB
NAMES "fftw3l"
PATHS ${PKG_FFTW_LIBRARY_DIRS} ${LIB_INSTALL_DIR}
)
find_path(
FFTW_INCLUDES
NAMES "fftw3.h"
PATHS ${PKG_FFTW_INCLUDE_DIRS} ${INCLUDE_INSTALL_DIR}
)
endif()
set(FFTW_LIBRARIES ${FFTW_LIB} ${FFTWF_LIB})
if(FFTWL_LIB)
set(FFTW_LIBRARIES ${FFTW_LIBRARIES} ${FFTWL_LIB})
endif()
set( CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES_SAV} )
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(FFTW DEFAULT_MSG
FFTW_INCLUDES FFTW_LIBRARIES)
mark_as_advanced(FFTW_INCLUDES FFTW_LIBRARIES FFTW_LIB FFTWF_LIB FFTWL_LIB)
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