[Teem-commit] SF.net SVN: teem:[7411] teem/trunk/CMake/FindLEVMAR-v 2.cmake

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

Revision: 7411
          http://sourceforge.net/p/teem/code/7411
Author:   kindlmann
Date:     2025-09-12 03:54:18 +0000 (Fri, 12 Sep 2025)
Log Message:
-----------
getting find_package(LEVMAR) into shape

Modified Paths:
--------------
    teem/trunk/CMake/FindLEVMAR-v2.cmake

Modified: teem/trunk/CMake/FindLEVMAR-v2.cmake
===================================================================
--- teem/trunk/CMake/FindLEVMAR-v2.cmake	2025-09-12 03:53:31 UTC (rev 7410)
+++ teem/trunk/CMake/FindLEVMAR-v2.cmake	2025-09-12 03:54:18 UTC (rev 7411)
@@ -1,24 +1,140 @@
-# (from cif) suggested usage
-#list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules")
-#find_package(LEVMAR REQUIRED)
+# CMake/FindLEVMAR.cmake: Careful+verbose way of looking for levmar install
+#    ("levmar" = https://users.ics.forth.gr/~lourakis/levmar/index.html)
+# Copyright (C) 2025  University of Chicago
+# See ../LICENSE.txt for licensing terms
+
+# TODO:
+# how is cmake detecting of this levmar also needs lapack and blas?
+# how does find_package(LAPACK/BLAS QUIET) work? is that CMake built-in?
+# check hints to find_path and find_library
+# make sure we're getting the right version of levmar
+# BUILD_SHARED_LIBS with liblevmar.a: [ 96%] Linking C shared library libteem.dylib
+#          ld: warning: ignoring duplicate libraries: '-ldl', '-lm', '/Users/gk/src/levmar-2.6/liblevmar.a'
+
+# This module defines:
+#   LEVMAR_FOUND        - True if both header and library were found
+#   LEVMAR_INCLUDE_DIR  - Directory containing levmar.h
+#   LEVMAR_LIBRARY      - Full path to levmar library file
+#   LEVMAR_INCLUDE_DIRS - Directories to add to include path (currently just levmar)
+#   LEVMAR_LIBRARIES    - Libraries to link (levmar plus lapack/blas if found)
 #
-#if(LEVMAR_FOUND)
-#  include_directories(${LEVMAR_INCLUDE_DIRS})
-#  target_link_libraries(your_target ${LEVMAR_LIBRARIES})
-#endif()
+# Usage:
+#   find_package(LEVMAR REQUIRED)
+#   target_link_libraries(myexe PRIVATE ${LEVMAR_LIBRARIES})
 
-find_path(LEVMAR_INCLUDE_DIR levmar.h
-  PATH_SUFFIXES levmar
+# how we identify ourselves
+set(_dep "LEVMAR")
+
+# Option to enable extra debug output from this module
+option(Teem_${_dep}_DEBUG "Print detailed debug about finding ${_dep}" OFF)
+
+# Helper macros to print only when Teem_${_dep}_DEBUG is enabled
+macro(_status msg)
+  if(Teem_${_dep}_DEBUG)
+    message(STATUS "[Find${_dep}] ${msg}")
+  endif()
+endmacro()
+macro(_check_start msg)
+  if(Teem_${_dep}_DEBUG)
+    message(CHECK_START "[Find${_dep}] ${msg}")
+  endif()
+endmacro()
+macro(_check_fail msg)
+  if(Teem_${_dep}_DEBUG)
+    message(CHECK_FAIL "${msg}")
+  endif()
+endmacro()
+macro(_check_pass msg)
+  if(Teem_${_dep}_DEBUG)
+    message(CHECK_PASS "${msg}")
+  endif()
+endmacro()
+
+# Try to find directory containing levmar.h
+# https://cmake.org/cmake/help/latest/command/find_path.html
+find_path(LEVMAR_INCLUDE_DIR
+  NAMES levmar.h
+  HINTS
+    ${CMAKE_INSTALL_PREFIX}/include
+    /usr/include
+    /usr/local/include
+  PATH_SUFFIXES
+    include
+    levmar
+  DOC "Directory containing levmar.h"
 )
+_status("find_path result: LEVMAR_INCLUDE_DIR='${LEVMAR_INCLUDE_DIR}'")
 
-find_library(LEVMAR_LIBRARY NAMES levmar
-  PATH_SUFFIXES lib
+# Try to find full path to liblevmar library file
+find_library(LEVMAR_LIBRARY
+  NAMES levmar
+  HINTS
+    ${CMAKE_INSTALL_PREFIX}/lib
+    /usr/lib
+    /usr/local/lib
+  PATH_SUFFIXES
+    lib
+  DOC "Full path to the liblevmar.\{a\|so\|dylib\|lib\} file"
 )
+_status("find_library result: LEVMAR_LIBRARY='${LEVMAR_LIBRARY}'")
 
+# If we found the library but levmar depends on LAPACK and BLAS, try to find them.
+# Levmar's docs advise having LAPACK/BLAS available to use the full feature set.
+# (This is optional — we don't fail if LAPACK isn't present.)
+if(LEVMAR_LIBRARY)   # HEY is this conditional useful?
+  find_package(LAPACK QUIET)
+  if(LAPACK_FOUND)
+    _status("LAPACK found: ${LAPACK_LIBRARIES}")
+  else()
+    _status("LAPACK *not* found")
+  endif()
+
+  find_package(BLAS QUIET)
+  if(BLAS_FOUND)
+    _status("BLAS found: ${BLAS_LIBRARIES}")
+  else()
+    _status("BLAS *not* found")
+  endif()
+endif()
+
+# Include the helper macro for standard handling of results
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(LEVMAR DEFAULT_MSG LEVMAR_LIBRARY LEVMAR_INCLUDE_DIR)
+_check_start("find_package_handle_standard_args(LEVMAR)")
+# Standard handling macro: sets LEVMAR_FOUND if successful
+find_package_handle_standard_args(LEVMAR
+  REQUIRED_VARS LEVMAR_INCLUDE_DIR LEVMAR_LIBRARY
+)
 
 if(LEVMAR_FOUND)
+  set(LEVMAR_INCLUDE_DIRS ${LEVMAR_INCLUDE_DIR})
+
   set(LEVMAR_LIBRARIES ${LEVMAR_LIBRARY})
-  set(LEVMAR_INCLUDE_DIRS ${LEVMAR_INCLUDE_DIR})
+  if(LAPACK_FOUND)
+    list(APPEND LEVMAR_LIBRARIES ${LAPACK_LIBRARIES})
+  endif()
+  if(BLAS_FOUND)
+    list(APPEND LEVMAR_LIBRARIES ${BLAS_LIBRARIES})
+  endif()
+
+  # If we did find LEVMAR, but no imported target exists yet,
+  # create our own IMPORTED target so downstream code can use:
+  #     target_link_libraries(myprog PRIVATE FFTW3::fftw3)
+  if(NOT TARGET LEVMAR::LEVMAR)
+    add_library(LEVMAR::LEVMAR UNKNOWN IMPORTED)
+    set_target_properties(LEVMAR::LEVMAR PROPERTIES
+      IMPORTED_LOCATION             "${LEVMAR_LIBRARY}"
+      INTERFACE_INCLUDE_DIRECTORIES "${LEVMAR_INCLUDE_DIR}"
+      INTERFACE_LINK_LIBRARIES      "${LEVMAR_LIBRARIES}"
+    )
+  endif()
+  _check_pass("Found: LEVMAR_INCLUDE_DIRS=${LEVMAR_INCLUDE_DIRS} LEVMAR_LIBRARIES=${LEVMAR_LIBRARIES}")
+else()
+  _check_fail("Not found")
 endif()
+
+# clean up
+unset(_dep)
+unset(_status)
+unset(_check_start)
+unset(_check_fail)
+unset(_check_pass)

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