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| 1 | +cmake_minimum_required(VERSION 3.10) |
| 2 | +project(test_findFFTW NONE) |
| 3 | + |
| 4 | +# Add the parent directory (repo root) to the module path so CMake can find FindFFTW.cmake |
| 5 | +list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/..") |
| 6 | + |
| 7 | +# Find FFTW. If FFTW_TEST_COMPONENTS is given (semicolon-separated list), those |
| 8 | +# components are required; otherwise we just require that FFTW itself is found. |
| 9 | +if(DEFINED FFTW_TEST_COMPONENTS) |
| 10 | + find_package(FFTW REQUIRED COMPONENTS ${FFTW_TEST_COMPONENTS}) |
| 11 | +else() |
| 12 | + find_package(FFTW REQUIRED) |
| 13 | +endif() |
| 14 | + |
| 15 | +# --------------------------------------------------------------------------- |
| 16 | +# Check that the basic variables are set |
| 17 | +# --------------------------------------------------------------------------- |
| 18 | +if(NOT FFTW_FOUND) |
| 19 | + message(FATAL_ERROR "FFTW_FOUND is not TRUE after find_package(FFTW REQUIRED)") |
| 20 | +endif() |
| 21 | + |
| 22 | +if(NOT FFTW_INCLUDE_DIRS) |
| 23 | + message(FATAL_ERROR "FFTW_INCLUDE_DIRS is empty after find_package(FFTW REQUIRED)") |
| 24 | +endif() |
| 25 | + |
| 26 | +if(NOT FFTW_LIBRARIES) |
| 27 | + message(FATAL_ERROR "FFTW_LIBRARIES is empty after find_package(FFTW REQUIRED)") |
| 28 | +endif() |
| 29 | + |
| 30 | +# --------------------------------------------------------------------------- |
| 31 | +# Map component names to their CMake imported target names |
| 32 | +# --------------------------------------------------------------------------- |
| 33 | +set(FFTW_DOUBLE_LIB_TARGET FFTW::Double) |
| 34 | +set(FFTW_FLOAT_LIB_TARGET FFTW::Float) |
| 35 | +set(FFTW_LONGDOUBLE_LIB_TARGET FFTW::LongDouble) |
| 36 | +set(FFTW_DOUBLE_THREADS_LIB_TARGET FFTW::DoubleThreads) |
| 37 | +set(FFTW_FLOAT_THREADS_LIB_TARGET FFTW::FloatThreads) |
| 38 | +set(FFTW_LONGDOUBLE_THREADS_LIB_TARGET FFTW::LongDoubleThreads) |
| 39 | +set(FFTW_DOUBLE_OPENMP_LIB_TARGET FFTW::DoubleOpenMP) |
| 40 | +set(FFTW_FLOAT_OPENMP_LIB_TARGET FFTW::FloatOpenMP) |
| 41 | +set(FFTW_LONGDOUBLE_OPENMP_LIB_TARGET FFTW::LongDoubleOpenMP) |
| 42 | +set(FFTW_DOUBLE_MPI_LIB_TARGET FFTW::DoubleMPI) |
| 43 | +set(FFTW_FLOAT_MPI_LIB_TARGET FFTW::FloatMPI) |
| 44 | +set(FFTW_LONGDOUBLE_MPI_LIB_TARGET FFTW::LongDoubleMPI) |
| 45 | + |
| 46 | +# --------------------------------------------------------------------------- |
| 47 | +# Check per-component variables and targets for each expected component |
| 48 | +# --------------------------------------------------------------------------- |
| 49 | +foreach(component IN LISTS FFTW_TEST_COMPONENTS) |
| 50 | + if(NOT FFTW_${component}_FOUND) |
| 51 | + message(FATAL_ERROR |
| 52 | + "Expected FFTW component ${component} was not found: " |
| 53 | + "FFTW_${component}_FOUND is not TRUE") |
| 54 | + endif() |
| 55 | + |
| 56 | + # The library variable name is FFTW_<component>, e.g. FFTW_DOUBLE_LIB |
| 57 | + if(NOT FFTW_${component}) |
| 58 | + message(FATAL_ERROR |
| 59 | + "FFTW_${component} is empty for found component ${component}") |
| 60 | + endif() |
| 61 | + |
| 62 | + set(_target "${FFTW_${component}_TARGET}") |
| 63 | + if(_target AND NOT TARGET ${_target}) |
| 64 | + message(FATAL_ERROR |
| 65 | + "CMake imported target ${_target} was not created for component ${component}") |
| 66 | + endif() |
| 67 | +endforeach() |
| 68 | + |
| 69 | +# --------------------------------------------------------------------------- |
| 70 | +# Informational output (also shows status of all optional components) |
| 71 | +# --------------------------------------------------------------------------- |
| 72 | +message(STATUS "FindFFTW test passed!") |
| 73 | +message(STATUS " FFTW_FOUND: ${FFTW_FOUND}") |
| 74 | +message(STATUS " FFTW_INCLUDE_DIRS: ${FFTW_INCLUDE_DIRS}") |
| 75 | +message(STATUS " FFTW_LIBRARIES: ${FFTW_LIBRARIES}") |
| 76 | + |
| 77 | +set(_all_components |
| 78 | + DOUBLE_LIB FLOAT_LIB LONGDOUBLE_LIB |
| 79 | + DOUBLE_THREADS_LIB FLOAT_THREADS_LIB LONGDOUBLE_THREADS_LIB |
| 80 | + DOUBLE_OPENMP_LIB FLOAT_OPENMP_LIB LONGDOUBLE_OPENMP_LIB |
| 81 | + DOUBLE_MPI_LIB FLOAT_MPI_LIB LONGDOUBLE_MPI_LIB |
| 82 | +) |
| 83 | +message(STATUS " Component status:") |
| 84 | +foreach(_comp IN LISTS _all_components) |
| 85 | + message(STATUS " FFTW_${_comp}_FOUND=${FFTW_${_comp}_FOUND} lib=${FFTW_${_comp}}") |
| 86 | +endforeach() |
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