# http://tim.klingt.org/code/projects/supernova/repository/revisions/d336dd6f400e381bcfd720e96139656de0c53b6a/entry/cmake_modules/FindFFTW3f.cmake
# Modified to use pkg config and use standard var names

# Find single-precision (float) version of FFTW3

INCLUDE(FindPkgConfig)
PKG_CHECK_MODULES(PC_FFTW3F "fftw3f >= 3.0")

FIND_PATH(
    FFTW3F_INCLUDE_DIRS
    NAMES fftw3.h
    HINTS $ENV{FFTW3_DIR}/include
        ${PC_FFTW3F_INCLUDE_DIR}
    PATHS /usr/local/include
          /usr/include
)

FIND_LIBRARY(
    FFTW3F_LIBRARIES
    NAMES fftw3f libfftw3f
    HINTS $ENV{FFTW3_DIR}/lib
        ${PC_FFTW3F_LIBDIR}
    PATHS /usr/local/lib
          /usr/lib
          /usr/lib64
)

FIND_LIBRARY(
    FFTW3F_THREADS_LIBRARIES
    NAMES fftw3f_threads libfftw3f_threads
    HINTS $ENV{FFTW3_DIR}/lib
        ${PC_FFTW3F_LIBDIR}
    PATHS /usr/local/lib
          /usr/lib
          /usr/lib64
)

INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(FFTW3F DEFAULT_MSG FFTW3F_LIBRARIES FFTW3F_INCLUDE_DIRS)
MARK_AS_ADVANCED(FFTW3F_LIBRARIES FFTW3F_INCLUDE_DIRS FFTW3F_THREADS_LIBRARIES)

if(FFTW3F_LIBRARIES AND FFTW3F_INCLUDE_DIRS AND FFTW3F_THREADS_LIBRARIES)
    message(STATUS "Found FFTW3F: ${FFTW3F_INCLUDE_DIRS}, ${FFTW3F_LIBRARIES}, ${FFTW3F_THREADS_LIBRARIES}")
else()
    set(CM256CC_FOUND FALSE CACHE INTERNAL "CM256CC found")
    message(STATUS "FFTW3F not found. You should consider installing fftw3f")
endif()
