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#
# Encapsulates building FFTW as an External Project.
#
# NOTE: internal building of fftw is for convenience,
# and the version of fftw built here does not
# use modern hardware optimzations.
#
# The build configuration chosen to be
# generalizable to as many hardware platforms.
# Being backward compatible for decades
# old hardware is the goal of this internal
# representation.
#
# This is primarily used to support testing
# and should not be used for production
# builds where performance is a concern.
#
# These instructions follow the guidance provided for modern cmake usage as described:
# https://github.com/dev-cafe/cmake-cookbook/blob/master/chapter-08/recipe-03/c-example/external/upstream/fftw3/CMakeLists.txt
#
include(ITK_CheckCCompilerFlag)
if(NOT ITK_USE_MKL AND NOT ITK_USE_CUFFTW)
set(msg "ATTENTION: You have enabled the use of FFTW.")
set(msg "${msg} This library is distributed under a GPL license.")
set(msg "${msg} By enabling this option, the ITK libraries binary")
set(msg "${msg} that is built will be covered by a GPL license")
set(msg "${msg} and so will any executable that is linked against these libraries.")
message("${msg}")
endif()
if(NOT ITK_USE_SYSTEM_FFTW)
#
# fftw limitation -- can't be built in
# a directory with whitespace in its name.
if(${CMAKE_CURRENT_BINARY_DIR} MATCHES ".*[ \t].*")
message(FATAL_ERROR "Can't build fftw in a directory with whitespace in its name")
endif()
if(WIN32)
# on windows the build of FFTW must match that of ITK
set(FFTW_BUILD_TYPE ${CMAKE_BUILD_TYPE})
else()
set(FFTW_BUILD_TYPE Release)
endif()
include(GNUInstallDirs)
set(_fftw_target_version 3.3.10)
set(_fftw_url_hash
"2d34b5ccac7b08740dbdacc6ebe451d8a34cf9d9bfec85a5e776e87adf94abfd803c222412d8e10fbaa4ed46f504aa87180396af1b108666cde4314a55610b40"
)
set(_fftw_url "https://data.kitware.com/api/v1/file/hashsum/sha512/${_fftw_url_hash}/download")
set(FFTW_STAGED_INSTALL_PREFIX "${ITK_BINARY_DIR}/fftw")
set(PROJ_FFTWD_DEPENDS "")
if(ITK_USE_FFTWF)
itk_download_attempt_check(FFTW)
ExternalProject_Add(
fftwf
PREFIX fftwf-${_fftw_target_version}
INSTALL_DIR ${FFTW_STAGED_INSTALL_PREFIX}
URL ${_fftw_url}
URL_HASH SHA512=${_fftw_url_hash}
DOWNLOAD_NAME "fftw-${_fftw_target_version}.tar.gz"
DOWNLOAD_NO_PROGRESS 1
UPDATE_COMMAND ""
LOG_CONFIGURE 1
LOG_BUILD 1
LOG_INSTALL 1
CMAKE_CACHE_ARGS
-DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
-DBUILD_TESTS:BOOL=OFF
-DCMAKE_BUILD_TYPE:STRING=${FFTW_BUILD_TYPE}
-DCMAKE_INSTALL_PREFIX:PATH=${FFTW_STAGED_INSTALL_PREFIX}
-DCMAKE_INSTALL_LIBDIR:STRING=${CMAKE_INSTALL_LIBDIR}
-DCMAKE_INSTALL_BINDIR:STRING=${CMAKE_INSTALL_BINDIR}
-DDISABLE_FORTRAN:BOOL=ON
-DENABLE_AVX:BOOL=OFF
-DENABLE_AVX2:BOOL=OFF
-DENABLE_FLOAT:BOOL=ON
-DENABLE_LONG_DOUBLE:BOOL=OFF
-DENABLE_OPENMP:BOOL=OFF
-DENABLE_QUAD_PRECISION:BOOL=OFF
-DENABLE_SSE:BOOL=OFF
-DENABLE_SSE2:BOOL=OFF
-DENABLE_THREADS:BOOL=ON
-DCMAKE_APPLE_SILICON_PROCESSOR:STRING=${CMAKE_APPLE_SILICON_PROCESSOR}
-DCMAKE_C_COMPILER_LAUNCHER:PATH=${CMAKE_C_COMPILER_LAUNCHER}
-DCMAKE_C_COMPILER:PATH=${CMAKE_C_COMPILER}
-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}
-DCMAKE_OSX_SYSROOT:PATH=${CMAKE_OSX_SYSROOT}
-DCMAKE_OSX_DEPLOYMENT_TARGET:PATH=${CMAKE_OSX_DEPLOYMENT_TARGET}
-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=${CMAKE_POSITION_INDEPENDENT_CODE})
# set(
# FFTW3f_DIR ${FFTW_STAGED_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/cmake/fftw3f
# CACHE PATH "Path to internally built single precision FFTW3Config.cmake"
# FORCE
# )
# Can not find package, it does not yet exist find_package(FFTW3f CONFIG REQUIRED)
# but we know where it will eventually be!
set(FFTW3f_INCLUDE_DIRS ${FFTW_STAGED_INSTALL_PREFIX}/include)
set(FFTW3f_LIBRARY_DIRS ${FFTW_STAGED_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
set(FFTW_INCLUDE ${FFTW3_INCLUDE_DIRS})
set(FFTW_LIBDIR ${FFTW3_LIBRARY_DIRS})
set(ITK_FFTWF_LIBRARIES_NAMES fftw3f_threads fftw3f)
set(PROJ_FFTWD_DEPENDS "fftwf")
endif()
if(ITK_USE_FFTWD)
itk_download_attempt_check(FFTW)
ExternalProject_Add(
fftwd
PREFIX fftwd-${_fftw_target_version}
INSTALL_DIR ${FFTW_STAGED_INSTALL_PREFIX}
URL ${_fftw_url}
URL_HASH SHA512=${_fftw_url_hash}
DOWNLOAD_NAME "fftw-${_fftw_target_version}.tar.gz"
DOWNLOAD_NO_PROGRESS 1
UPDATE_COMMAND ""
LOG_CONFIGURE 1
LOG_BUILD 1
LOG_INSTALL 1
CMAKE_CACHE_ARGS
-DBUILD_SHARED_LIBS:BOOL=${BUILD_SHARED_LIBS}
-DBUILD_TESTS:BOOL=OFF
-DCMAKE_BUILD_TYPE:STRING=${FFTW_BUILD_TYPE}
-DCMAKE_INSTALL_PREFIX:PATH=${FFTW_STAGED_INSTALL_PREFIX}
-DCMAKE_INSTALL_LIBDIR:STRING=${CMAKE_INSTALL_LIBDIR}
-DCMAKE_INSTALL_BINDIR:STRING=${CMAKE_INSTALL_BINDIR}
-DDISABLE_FORTRAN:BOOL=ON
-DENABLE_AVX:BOOL=OFF
-DENABLE_AVX2:BOOL=OFF
-DENABLE_FLOAT:BOOL=OFF
-DENABLE_LONG_DOUBLE:BOOL=OFF
-DENABLE_OPENMP:BOOL=OFF
-DENABLE_QUAD_PRECISION:BOOL=OFF
-DENABLE_SSE:BOOL=OFF
-DENABLE_SSE2:BOOL=OFF
-DENABLE_THREADS:BOOL=ON
-DCMAKE_APPLE_SILICON_PROCESSOR:STRING=${CMAKE_APPLE_SILICON_PROCESSOR}
-DCMAKE_C_COMPILER_LAUNCHER:PATH=${CMAKE_C_COMPILER_LAUNCHER}
-DCMAKE_C_COMPILER:PATH=${CMAKE_C_COMPILER}
-DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}
-DCMAKE_OSX_SYSROOT:PATH=${CMAKE_OSX_SYSROOT}
-DCMAKE_OSX_DEPLOYMENT_TARGET:PATH=${CMAKE_OSX_DEPLOYMENT_TARGET}
-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=${CMAKE_POSITION_INDEPENDENT_CODE}
DEPENDS ${PROJ_FFTWD_DEPENDS} # Avoid potential collisions on install
)
# set(
# FFTW3_DIR ${FFTW_STAGED_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/cmake/fftw3
# CACHE PATH "Path to internally built double precision FFTW3Config.cmake"
# FORCE
# )
# Can not find package, it does not yet exist find_package(FFTW3 CONFIG REQUIRED)
set(FFTW3_INCLUDE_DIRS ${FFTW_STAGED_INSTALL_PREFIX}/include)
set(FFTW3_LIBRARY_DIRS ${FFTW_STAGED_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
set(FFTW_INCLUDE ${FFTW3_INCLUDE_DIRS})
set(FFTW_LIBDIR ${FFTW3_LIBRARY_DIRS})
set(ITK_FFTWD_LIBRARIES_NAMES fftw3_threads fftw3)
endif()
#
# copy libraries into install tree, NOTE: DESTINATION MUST EXACTLY MATCH values from main CMakeLists.txt for FFTW_LIBDIR
install(
CODE "file(GLOB FFTW_LIBS ${FFTW_STAGED_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/*fftw3*)
file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/ITK-${ITK_VERSION_MAJOR}.${ITK_VERSION_MINOR}\"
TYPE FILE FILES \${FFTW_LIBS})"
COMPONENT Development)
#
# copy headers into install tree
install(CODE "file(GLOB FFTW_INC ${FFTW_STAGED_INSTALL_PREFIX}/include/*fftw3*)
file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/include/ITK-${ITK_VERSION_MAJOR}.${ITK_VERSION_MINOR}\"
TYPE FILE FILES \${FFTW_INC})" COMPONENT Development)
else()
#Search the filesystem for compatible versions
find_package(FFTW) # Use local itk FindFFTW.config to set variables consistently both with/without USE_SYSTEM_FFTW
endif()
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