CMake: rm FindGSL.cmake, supplied by CMake 3.14

cmake/generic/modules/FindGSL.cmake

-#.rst:
-# FindGSL
-# --------
-#
-# Find the native GSL includes and libraries.
-#
-# The GNU Scientific Library (GSL) is a numerical library for C and C++
-# programmers. It is free software under the GNU General Public
-# License.
-#
-# Imported Targets
-# ^^^^^^^^^^^^^^^^
-#
-# If GSL is found, this module defines the following :prop_tgt:`IMPORTED`
-# targets::
-#
-#  GSL::gsl      - The main GSL library.
-#  GSL::gslcblas - The CBLAS support library used by GSL.
-#
-# Result Variables
-# ^^^^^^^^^^^^^^^^
-#
-# This module will set the following variables in your project::
-#
-#  GSL_FOUND          - True if GSL found on the local system
-#  GSL_INCLUDE_DIRS   - Location of GSL header files.
-#  GSL_LIBRARIES      - The GSL libraries.
-#  GSL_VERSION        - The version of the discovered GSL install.
-#
-# Hints
-# ^^^^^
-#
-# Set ``GSL_ROOT_DIR`` to a directory that contains a GSL installation.
-#
-# This script expects to find libraries at ``$GSL_ROOT_DIR/lib`` and the GSL
-# headers at ``$GSL_ROOT_DIR/include/gsl``.  The library directory may
-# optionally provide Release and Debug folders.  For Unix-like systems, this
-# script will use ``$GSL_ROOT_DIR/bin/gsl-config`` (if found) to aid in the
-# discovery GSL.
-#
-# Cache Variables
-# ^^^^^^^^^^^^^^^
-#
-# This module may set the following variables depending on platform and type
-# of GSL installation discovered.  These variables may optionally be set to
-# help this module find the correct files::
-#
-#  GSL_CLBAS_LIBRARY       - Location of the GSL CBLAS library.
-#  GSL_CBLAS_LIBRARY_DEBUG - Location of the debug GSL CBLAS library (if any).
-#  GSL_CONFIG_EXECUTABLE   - Location of the ``gsl-config`` script (if any).
-#  GSL_LIBRARY             - Location of the GSL library.
-#  GSL_LIBRARY_DEBUG       - Location of the debug GSL library (if any).
-#
-
-#=============================================================================
-# Copyright 2014 Kelly Thompson <kgt@lanl.gov>
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-
-# Include these modules to handle the QUIETLY and REQUIRED arguments.
-#include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) # original
-include(FindPackageHandleStandardArgs) # patched JWu 4/16
-
-#=============================================================================
-# If the user has provided ``GSL_ROOT_DIR``, use it!  Choose items found
-# at this location over system locations.
-if( EXISTS "$ENV{GSL_ROOT_DIR}" )
-  file( TO_CMAKE_PATH "$ENV{GSL_ROOT_DIR}" GSL_ROOT_DIR )
-  set( GSL_ROOT_DIR "${GSL_ROOT_DIR}" CACHE PATH "Prefix for GSL installation." )
-endif()
-if( NOT EXISTS "${GSL_ROOT_DIR}" )
-  set( GSL_USE_PKGCONFIG ON )
-endif()
-
-#=============================================================================
-# As a first try, use the PkgConfig module.  This will work on many
-# *NIX systems.  See :module:`findpkgconfig`
-# This will return ``GSL_INCLUDEDIR`` and ``GSL_LIBDIR`` used below.
-if( GSL_USE_PKGCONFIG )
-  find_package(PkgConfig)
-  pkg_check_modules( GSL QUIET gsl )
-
-  if( EXISTS "${GSL_INCLUDEDIR}" )
-    get_filename_component( GSL_ROOT_DIR "${GSL_INCLUDEDIR}" DIRECTORY CACHE)
-  endif()
-endif()
-
-#=============================================================================
-# Set GSL_INCLUDE_DIRS and GSL_LIBRARIES. If we skipped the PkgConfig step, try
-# to find the libraries at $GSL_ROOT_DIR (if provided) or in standard system
-# locations.  These find_library and find_path calls will prefer custom
-# locations over standard locations (HINTS).  If the requested file is not found
-# at the HINTS location, standard system locations will be still be searched
-# (/usr/lib64 (Redhat), lib/i386-linux-gnu (Debian)).
-
-find_path( GSL_INCLUDE_DIR
-  NAMES gsl/gsl_sf.h
-  HINTS ${GSL_ROOT_DIR}/include ${GSL_INCLUDEDIR}
-)
-find_library( GSL_LIBRARY
-  NAMES gsl
-  HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
-  PATH_SUFFIXES Release Debug
-)
-find_library( GSL_CBLAS_LIBRARY
-  NAMES gslcblas cblas
-  HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
-  PATH_SUFFIXES Release Debug
-)
-# Do we also have debug versions?
-find_library( GSL_LIBRARY_DEBUG
-  NAMES gsl
-  HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
-  PATH_SUFFIXES Debug
-)
-find_library( GSL_CBLAS_LIBRARY_DEBUG
-  NAMES gslcblas cblas
-  HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
-  PATH_SUFFIXES Debug
-)
-set( GSL_INCLUDE_DIRS ${GSL_INCLUDE_DIR} )
-set( GSL_LIBRARIES ${GSL_LIBRARY} ${GSL_CBLAS_LIBRARY} )
-
-# If we didn't use PkgConfig, try to find the version via gsl-config or by
-# reading gsl_version.h.
-if( NOT GSL_VERSION )
-  # 1. If gsl-config exists, query for the version.
-  find_program( GSL_CONFIG_EXECUTABLE
-    NAMES gsl-config
-    HINTS "${GSL_ROOT_DIR}/bin"
-    )
-  if( EXISTS "${GSL_CONFIG_EXECUTABLE}" )
-    execute_process(
-      COMMAND "${GSL_CONFIG_EXECUTABLE}" --version
-      OUTPUT_VARIABLE GSL_VERSION
-      OUTPUT_STRIP_TRAILING_WHITESPACE )
-  endif()
-
-  # 2. If gsl-config is not available, try looking in gsl/gsl_version.h
-  if( NOT GSL_VERSION AND EXISTS "${GSL_INCLUDE_DIRS}/gsl/gsl_version.h" )
-    file( STRINGS "${GSL_INCLUDE_DIRS}/gsl/gsl_version.h" gsl_version_h_contents REGEX "define GSL_VERSION" )
-    string( REGEX REPLACE ".*([0-9].[0-9][0-9]).*" "\\1" GSL_VERSION ${gsl_version_h_contents} )
-  endif()
-
-  # might also try scraping the directory name for a regex match "gsl-X.X"
-endif()
-
-#=============================================================================
-# handle the QUIETLY and REQUIRED arguments and set GSL_FOUND to TRUE if all
-# listed variables are TRUE
-find_package_handle_standard_args( GSL
-  FOUND_VAR
-    GSL_FOUND
-  REQUIRED_VARS
-    GSL_INCLUDE_DIR
-    GSL_LIBRARY
-    GSL_CBLAS_LIBRARY
-  VERSION_VAR
-    GSL_VERSION
-    )
-
-mark_as_advanced( GSL_ROOT_DIR GSL_VERSION GSL_LIBRARY GSL_INCLUDE_DIR
-  GSL_CBLAS_LIBRARY GSL_LIBRARY_DEBUG GSL_CBLAS_LIBRARY_DEBUG
-  GSL_USE_PKGCONFIG GSL_CONFIG )
-
-#=============================================================================
-# Register imported libraries:
-# 1. If we can find a Windows .dll file (or if we can find both Debug and
-#    Release libraries), we will set appropriate target properties for these.
-# 2. However, for most systems, we will only register the import location and
-#    include directory.
-
-# Look for dlls, or Release and Debug libraries.
-if(WIN32)
-  string( REPLACE ".lib" ".dll" GSL_LIBRARY_DLL       "${GSL_LIBRARY}" )
-  string( REPLACE ".lib" ".dll" GSL_CBLAS_LIBRARY_DLL "${GSL_CBLAS_LIBRARY}" )
-  string( REPLACE ".lib" ".dll" GSL_LIBRARY_DEBUG_DLL "${GSL_LIBRARY_DEBUG}" )
-  string( REPLACE ".lib" ".dll" GSL_CBLAS_LIBRARY_DEBUG_DLL "${GSL_CBLAS_LIBRARY_DEBUG}" )
-endif()
-
-if( GSL_FOUND AND NOT TARGET GSL::gsl )
-  if( EXISTS "${GSL_LIBRARY_DLL}" AND EXISTS "${GSL_CBLAS_LIBRARY_DLL}")
-
-    # Windows systems with dll libraries.
-    add_library( GSL::gsl      SHARED IMPORTED )
-    add_library( GSL::gslcblas SHARED IMPORTED )
-
-    # Windows with dlls, but only Release libraries.
-    set_target_properties( GSL::gslcblas PROPERTIES
-      IMPORTED_LOCATION_RELEASE         "${GSL_CBLAS_LIBRARY_DLL}"
-      IMPORTED_IMPLIB                   "${GSL_CBLAS_LIBRARY}"
-      INTERFACE_INCLUDE_DIRECTORIES     "${GSL_INCLUDE_DIRS}"
-      IMPORTED_CONFIGURATIONS           Release
-      IMPORTED_LINK_INTERFACE_LANGUAGES "C" )
-    set_target_properties( GSL::gsl PROPERTIES
-      IMPORTED_LOCATION_RELEASE         "${GSL_LIBRARY_DLL}"
-      IMPORTED_IMPLIB                   "${GSL_LIBRARY}"
-      INTERFACE_INCLUDE_DIRECTORIES     "${GSL_INCLUDE_DIRS}"
-      IMPORTED_CONFIGURATIONS           Release
-      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
-      INTERFACE_LINK_LIBRARIES          GSL::gslcblas )
-
-    # If we have both Debug and Release libraries
-    if( EXISTS "${GSL_LIBRARY_DEBUG_DLL}" AND EXISTS "${GSL_CBLAS_LIBRARY_DEBUG_DLL}")
-      set_property( TARGET GSL::gslcblas APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
-      set_target_properties( GSL::gslcblas PROPERTIES
-        IMPORTED_LOCATION_DEBUG           "${GSL_CBLAS_LIBRARY_DEBUG_DLL}"
-        IMPORTED_IMPLIB_DEBUG             "${GSL_CBLAS_LIBRARY_DEBUG}" )
-      set_property( TARGET GSL::gsl APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
-      set_target_properties( GSL::gsl PROPERTIES
-        IMPORTED_LOCATION_DEBUG           "${GSL_LIBRARY_DEBUG_DLL}"
-        IMPORTED_IMPLIB_DEBUG             "${GSL_LIBRARY_DEBUG}" )
-    endif()
-
-  else()
-
-    # For all other environments (ones without dll libraries), create
-    # the imported library targets.
-    add_library( GSL::gsl      UNKNOWN IMPORTED )
-    add_library( GSL::gslcblas UNKNOWN IMPORTED )
-    set_target_properties( GSL::gslcblas PROPERTIES
-      IMPORTED_LOCATION                 "${GSL_CBLAS_LIBRARY}"
-      INTERFACE_INCLUDE_DIRECTORIES     "${GSL_INCLUDE_DIRS}"
-      IMPORTED_LINK_INTERFACE_LANGUAGES "C" )
-    set_target_properties( GSL::gsl PROPERTIES
-      IMPORTED_LOCATION                 "${GSL_LIBRARY}"
-      INTERFACE_INCLUDE_DIRECTORIES     "${GSL_INCLUDE_DIRS}"
-      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
-      INTERFACE_LINK_LIBRARIES          GSL::gslcblas )
-  endif()
-endif()