[Teem-commit] SF.net SVN: teem:[7406] teem/trunk/CMake/FindFFTW3. cmake

[<kin...@us...>]

Revision: 7406
          http://sourceforge.net/p/teem/code/7406
Author:   kindlmann
Date:     2025-09-11 07:33:27 +0000 (Thu, 11 Sep 2025)
Log Message:
-----------
rewinding this back to 2015's r6232, awaiting a more coordinate transition to the v2 cmake files

Modified Paths:
--------------
    teem/trunk/CMake/FindFFTW3.cmake

Modified: teem/trunk/CMake/FindFFTW3.cmake
===================================================================
--- teem/trunk/CMake/FindFFTW3.cmake	2025-09-11 07:11:02 UTC (rev 7405)
+++ teem/trunk/CMake/FindFFTW3.cmake	2025-09-11 07:33:27 UTC (rev 7406)
@@ -1,76 +1,22 @@
-#
-# Teem: Tools to process and visualize scientific data and images
-# Copyright (C) 2009--2025  University of Chicago
-# Copyright (C) 2005--2008  Gordon Kindlmann
-# Copyright (C) 1998--2004  University of Utah
-#
-# This library is free software; you can redistribute it and/or modify it under the terms
-# of the GNU Lesser General Public License (LGPL) as published by the Free Software
-# Foundation; either version 2.1 of the License, or (at your option) any later version.
-# The terms of redistributing and/or modifying this software also include exceptions to
-# the LGPL that facilitate static linking.
-#
-# This library is distributed in the hope that it will be useful, but WITHOUT ANY
-# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
-# PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
-# You should have received a copy of the GNU Lesser General Public License
-# along with this library; if not, see <https://www.gnu.org/licenses/>.
-#
 
-# Even though CMake already has a built-in FindFFTW3.cmake, it assumes that fftw3 was
-# installed locally via CMake, but that's not what e.g. (mac) brew or (linux) apt
-# actually does, so find_package(FFTW3) can succeed but is not able to define imported
-# targets for use with target_link_libraries(FFTW3::fftw3) This is a long-standing issue:
-# https://github.com/FFTW/fftw3/issues/130
-# and there must be various solutions out there, since ChatGPT basically wrote the code
-# below (and is characterically unable to provide a citation for similarly simple but
-# working code online)
+find_path(FFTW3_INCLUDE_DIR fftw3.h
+  /usr/local/include
+  /usr/include
+)
 
-# TODO: handle the various variants for different precisions
-# See FindFFTW3-multiprec.cmake for inspiration
+find_library(FFTW3_LIBRARY fftw3
+  /usr/lib
+  /usr/local/lib
+)
 
-# NOTE: If a working FFTW3Config.cmake is found, it will define
-# FFTW3::fftw3 for us already, so we don’t have to do anything else.
-# This fallback only runs when FFTW3_FOUND is still FALSE.
-if (NOT FFTW3_FOUND)
+set(FFTW3_FOUND FALSE)
+if(FFTW3_INCLUDE_DIR AND FFTW3_LIBRARY)
+    set(FFTW3_LIBRARIES ${FFTW3_LIBRARY} )
+    set(FFTW3_FOUND TRUE)
+endif()
 
-  # Include the helper macro for standard handling of results
-  include(FindPackageHandleStandardArgs)
-
-  # Look for the FFTW3 header. Users can help by setting FFTW3_DIR or
-  # by making sure the header is somewhere in the default search paths.
-  find_path(FFTW3_INCLUDE_DIR
-    NAMES fftw3.h
-    HINTS ENV FFTW3_DIR
-    PATH_SUFFIXES include
+mark_as_advanced(
+  FFTW3_INCLUDE_DIR
+  FFTW3_LIBRARIES
+  FFTW3_FOUND
   )
-
-  # Look for the FFTW3 library. Allow FFTW3_DIR to point to its prefix.
-  find_library(FFTW3_LIBRARY
-    NAMES fftw3
-    HINTS ENV FFTW3_DIR
-    PATH_SUFFIXES lib
-  )
-
-  # Standard handling macro: sets FFTW3_FOUND if the above succeeded
-  find_package_handle_standard_args(FFTW3
-    REQUIRED_VARS FFTW3_LIBRARY FFTW3_INCLUDE_DIR
-  )
-
-  # If we did find FFTW3, but no imported target exists yet,
-  # create our own IMPORTED target so downstream code can use:
-  #     target_link_libraries(myprog PRIVATE FFTW3::fftw3)
-  if (FFTW3_FOUND AND NOT TARGET FFTW3::fftw3)
-    add_library(FFTW3::fftw3 UNKNOWN IMPORTED)
-    set_target_properties(FFTW3::fftw3 PROPERTIES
-      IMPORTED_LOCATION "${FFTW3_LIBRARY}"
-      INTERFACE_INCLUDE_DIRECTORIES "${FFTW3_INCLUDE_DIR}"
-    )
-  endif()
-endif()
-
-if (FFTW3_FOUND)
-  message(STATUS "Using FFTW3: ${FFTW3_LIBRARY}")
-else()
-  message(STATUS "FFTW3 not found")
-endif()

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