229 lines
8.7 KiB
CMake
229 lines
8.7 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#.rst:
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# FindGSL
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# --------
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#
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# Find the native GSL includes and libraries.
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#
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# The GNU Scientific Library (GSL) is a numerical library for C and C++
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# programmers. It is free software under the GNU General Public
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# License.
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#
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# Imported Targets
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# ^^^^^^^^^^^^^^^^
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#
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# If GSL is found, this module defines the following :prop_tgt:`IMPORTED`
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# targets::
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#
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# GSL::gsl - The main GSL library.
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# GSL::gslcblas - The CBLAS support library used by GSL.
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#
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# Result Variables
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# ^^^^^^^^^^^^^^^^
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#
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# This module will set the following variables in your project::
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#
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# GSL_FOUND - True if GSL found on the local system
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# GSL_INCLUDE_DIRS - Location of GSL header files.
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# GSL_LIBRARIES - The GSL libraries.
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# GSL_VERSION - The version of the discovered GSL install.
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#
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# Hints
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# ^^^^^
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#
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# Set ``GSL_ROOT_DIR`` to a directory that contains a GSL installation.
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#
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# This script expects to find libraries at ``$GSL_ROOT_DIR/lib`` and the GSL
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# headers at ``$GSL_ROOT_DIR/include/gsl``. The library directory may
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# optionally provide Release and Debug folders. For Unix-like systems, this
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# script will use ``$GSL_ROOT_DIR/bin/gsl-config`` (if found) to aid in the
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# discovery GSL.
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#
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# Cache Variables
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# ^^^^^^^^^^^^^^^
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#
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# This module may set the following variables depending on platform and type
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# of GSL installation discovered. These variables may optionally be set to
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# help this module find the correct files::
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#
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# GSL_CBLAS_LIBRARY - Location of the GSL CBLAS library.
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# GSL_CBLAS_LIBRARY_DEBUG - Location of the debug GSL CBLAS library (if any).
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# GSL_CONFIG_EXECUTABLE - Location of the ``gsl-config`` script (if any).
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# GSL_LIBRARY - Location of the GSL library.
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# GSL_LIBRARY_DEBUG - Location of the debug GSL library (if any).
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#
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# Include these modules to handle the QUIETLY and REQUIRED arguments.
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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#=============================================================================
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# If the user has provided ``GSL_ROOT_DIR``, use it! Choose items found
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# at this location over system locations.
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if( EXISTS "$ENV{GSL_ROOT_DIR}" )
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file( TO_CMAKE_PATH "$ENV{GSL_ROOT_DIR}" GSL_ROOT_DIR )
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set( GSL_ROOT_DIR "${GSL_ROOT_DIR}" CACHE PATH "Prefix for GSL installation." )
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endif()
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if( NOT EXISTS "${GSL_ROOT_DIR}" )
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set( GSL_USE_PKGCONFIG ON )
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endif()
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#=============================================================================
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# As a first try, use the PkgConfig module. This will work on many
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# *NIX systems. See :module:`findpkgconfig`
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# This will return ``GSL_INCLUDEDIR`` and ``GSL_LIBDIR`` used below.
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if( GSL_USE_PKGCONFIG )
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find_package(PkgConfig)
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pkg_check_modules( GSL QUIET gsl )
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if( EXISTS "${GSL_INCLUDEDIR}" )
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get_filename_component( GSL_ROOT_DIR "${GSL_INCLUDEDIR}" DIRECTORY CACHE)
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endif()
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endif()
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#=============================================================================
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# Set GSL_INCLUDE_DIRS and GSL_LIBRARIES. If we skipped the PkgConfig step, try
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# to find the libraries at $GSL_ROOT_DIR (if provided) or in standard system
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# locations. These find_library and find_path calls will prefer custom
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# locations over standard locations (HINTS). If the requested file is not found
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# at the HINTS location, standard system locations will be still be searched
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# (/usr/lib64 (Redhat), lib/i386-linux-gnu (Debian)).
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find_path( GSL_INCLUDE_DIR
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NAMES gsl/gsl_sf.h
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HINTS ${GSL_ROOT_DIR}/include ${GSL_INCLUDEDIR}
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)
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find_library( GSL_LIBRARY
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NAMES gsl
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HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
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PATH_SUFFIXES Release Debug
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)
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find_library( GSL_CBLAS_LIBRARY
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NAMES gslcblas cblas
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HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
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PATH_SUFFIXES Release Debug
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)
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# Do we also have debug versions?
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find_library( GSL_LIBRARY_DEBUG
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NAMES gsl
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HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
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PATH_SUFFIXES Debug
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)
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find_library( GSL_CBLAS_LIBRARY_DEBUG
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NAMES gslcblas cblas
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HINTS ${GSL_ROOT_DIR}/lib ${GSL_LIBDIR}
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PATH_SUFFIXES Debug
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)
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set( GSL_INCLUDE_DIRS ${GSL_INCLUDE_DIR} )
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set( GSL_LIBRARIES ${GSL_LIBRARY} ${GSL_CBLAS_LIBRARY} )
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# If we didn't use PkgConfig, try to find the version via gsl-config or by
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# reading gsl_version.h.
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if( NOT GSL_VERSION )
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# 1. If gsl-config exists, query for the version.
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find_program( GSL_CONFIG_EXECUTABLE
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NAMES gsl-config
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HINTS "${GSL_ROOT_DIR}/bin"
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)
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if( EXISTS "${GSL_CONFIG_EXECUTABLE}" )
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execute_process(
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COMMAND "${GSL_CONFIG_EXECUTABLE}" --version
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OUTPUT_VARIABLE GSL_VERSION
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OUTPUT_STRIP_TRAILING_WHITESPACE )
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endif()
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# 2. If gsl-config is not available, try looking in gsl/gsl_version.h
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if( NOT GSL_VERSION AND EXISTS "${GSL_INCLUDE_DIRS}/gsl/gsl_version.h" )
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file( STRINGS "${GSL_INCLUDE_DIRS}/gsl/gsl_version.h" gsl_version_h_contents REGEX "define GSL_VERSION" )
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string( REGEX REPLACE ".*([0-9].[0-9][0-9]).*" "\\1" GSL_VERSION ${gsl_version_h_contents} )
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endif()
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# might also try scraping the directory name for a regex match "gsl-X.X"
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endif()
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#=============================================================================
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# handle the QUIETLY and REQUIRED arguments and set GSL_FOUND to TRUE if all
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# listed variables are TRUE
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find_package_handle_standard_args( GSL
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FOUND_VAR
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GSL_FOUND
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REQUIRED_VARS
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GSL_INCLUDE_DIR
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GSL_LIBRARY
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GSL_CBLAS_LIBRARY
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VERSION_VAR
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GSL_VERSION
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)
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mark_as_advanced( GSL_ROOT_DIR GSL_VERSION GSL_LIBRARY GSL_INCLUDE_DIR
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GSL_CBLAS_LIBRARY GSL_LIBRARY_DEBUG GSL_CBLAS_LIBRARY_DEBUG
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GSL_USE_PKGCONFIG GSL_CONFIG )
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#=============================================================================
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# Register imported libraries:
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# 1. If we can find a Windows .dll file (or if we can find both Debug and
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# Release libraries), we will set appropriate target properties for these.
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# 2. However, for most systems, we will only register the import location and
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# include directory.
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# Look for dlls, or Release and Debug libraries.
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if(WIN32)
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string( REPLACE ".lib" ".dll" GSL_LIBRARY_DLL "${GSL_LIBRARY}" )
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string( REPLACE ".lib" ".dll" GSL_CBLAS_LIBRARY_DLL "${GSL_CBLAS_LIBRARY}" )
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string( REPLACE ".lib" ".dll" GSL_LIBRARY_DEBUG_DLL "${GSL_LIBRARY_DEBUG}" )
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string( REPLACE ".lib" ".dll" GSL_CBLAS_LIBRARY_DEBUG_DLL "${GSL_CBLAS_LIBRARY_DEBUG}" )
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endif()
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if( GSL_FOUND AND NOT TARGET GSL::gsl )
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if( EXISTS "${GSL_LIBRARY_DLL}" AND EXISTS "${GSL_CBLAS_LIBRARY_DLL}")
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# Windows systems with dll libraries.
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add_library( GSL::gsl SHARED IMPORTED )
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add_library( GSL::gslcblas SHARED IMPORTED )
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# Windows with dlls, but only Release libraries.
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set_target_properties( GSL::gslcblas PROPERTIES
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IMPORTED_LOCATION_RELEASE "${GSL_CBLAS_LIBRARY_DLL}"
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IMPORTED_IMPLIB "${GSL_CBLAS_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GSL_INCLUDE_DIRS}"
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IMPORTED_CONFIGURATIONS Release
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IMPORTED_LINK_INTERFACE_LANGUAGES "C" )
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set_target_properties( GSL::gsl PROPERTIES
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IMPORTED_LOCATION_RELEASE "${GSL_LIBRARY_DLL}"
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IMPORTED_IMPLIB "${GSL_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GSL_INCLUDE_DIRS}"
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IMPORTED_CONFIGURATIONS Release
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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INTERFACE_LINK_LIBRARIES GSL::gslcblas )
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# If we have both Debug and Release libraries
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if( EXISTS "${GSL_LIBRARY_DEBUG_DLL}" AND EXISTS "${GSL_CBLAS_LIBRARY_DEBUG_DLL}")
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set_property( TARGET GSL::gslcblas APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
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set_target_properties( GSL::gslcblas PROPERTIES
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IMPORTED_LOCATION_DEBUG "${GSL_CBLAS_LIBRARY_DEBUG_DLL}"
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IMPORTED_IMPLIB_DEBUG "${GSL_CBLAS_LIBRARY_DEBUG}" )
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set_property( TARGET GSL::gsl APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
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set_target_properties( GSL::gsl PROPERTIES
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IMPORTED_LOCATION_DEBUG "${GSL_LIBRARY_DEBUG_DLL}"
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IMPORTED_IMPLIB_DEBUG "${GSL_LIBRARY_DEBUG}" )
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endif()
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else()
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# For all other environments (ones without dll libraries), create
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# the imported library targets.
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add_library( GSL::gsl UNKNOWN IMPORTED )
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add_library( GSL::gslcblas UNKNOWN IMPORTED )
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set_target_properties( GSL::gslcblas PROPERTIES
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IMPORTED_LOCATION "${GSL_CBLAS_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GSL_INCLUDE_DIRS}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C" )
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set_target_properties( GSL::gsl PROPERTIES
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IMPORTED_LOCATION "${GSL_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GSL_INCLUDE_DIRS}"
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IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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INTERFACE_LINK_LIBRARIES GSL::gslcblas )
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endif()
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endif()
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