275 lines
9.5 KiB
CMake
275 lines
9.5 KiB
CMake
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# Find LAPACK library
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#
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# This module finds an installed library that implements the LAPACK
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# linear-algebra interface (see http://www.netlib.org/lapack/).
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# The approach follows mostly that taken for the autoconf macro file, acx_lapack.m4
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# (distributed at http://ac-archive.sourceforge.net/ac-archive/acx_lapack.html).
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#
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# This module sets the following variables:
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# LAPACK_FOUND - set to true if a library implementing the LAPACK interface
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# is found
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# LAPACK_INCLUDE_DIR - Directories containing the LAPACK header files
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# LAPACK_DEFINITIONS - Compilation options to use LAPACK
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# LAPACK_LINKER_FLAGS - Linker flags to use LAPACK (excluding -l
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# and -L).
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# LAPACK_LIBRARIES_DIR - Directories containing the LAPACK libraries.
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# May be null if LAPACK_LIBRARIES contains libraries name using full path.
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# LAPACK_LIBRARIES - List of libraries to link against LAPACK interface.
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# May be null if the compiler supports auto-link (e.g. VC++).
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# LAPACK_USE_FILE - The name of the cmake module to include to compile
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# applications or libraries using LAPACK.
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#
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# This module was modified by CGAL team:
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# - find libraries for a C++ compiler, instead of Fortran
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# - added LAPACK_INCLUDE_DIR, LAPACK_DEFINITIONS and LAPACK_LIBRARIES_DIR
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# - removed LAPACK95_LIBRARIES
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include(CheckFunctionExists)
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include(CMakeFindDependencyMacro)
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# This macro checks for the existence of the combination of fortran libraries
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# given by _list. If the combination is found, this macro checks (using the
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# check_function_exists macro) whether can link against that library
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# combination using the name of a routine given by _name using the linker
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# flags given by _flags. If the combination of libraries is found and passes
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# the link test, LIBRARIES is set to the list of complete library paths that
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# have been found and DEFINITIONS to the required definitions.
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# Otherwise, LIBRARIES is set to FALSE.
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# N.B. _prefix is the prefix applied to the names of all cached variables that
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# are generated internally and marked advanced by this macro.
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macro(check_lapack_libraries DEFINITIONS LIBRARIES _prefix _name _flags _list _blas _path)
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#message("DEBUG: check_lapack_libraries(${_list} in ${_path} with ${_blas})")
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# Check for the existence of the libraries given by _list
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set(_libraries_found TRUE)
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set(_libraries_work FALSE)
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set(${DEFINITIONS} "")
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set(${LIBRARIES} "")
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set(_combined_name)
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foreach(_library ${_list})
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set(_combined_name ${_combined_name}_${_library})
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if(_libraries_found)
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# search first in ${_path}
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find_library(${_prefix}_${_library}_LIBRARY
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NAMES ${_library}
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PATHS ${_path} NO_DEFAULT_PATH
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)
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# if not found, search in environment variables and system
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if ( WIN32 )
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find_library(${_prefix}_${_library}_LIBRARY
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NAMES ${_library}
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PATHS ENV LIB
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)
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elseif ( APPLE )
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find_library(${_prefix}_${_library}_LIBRARY
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NAMES ${_library}
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PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 ENV DYLD_LIBRARY_PATH
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)
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else ()
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find_library(${_prefix}_${_library}_LIBRARY
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NAMES ${_library}
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PATHS /usr/local/lib /usr/lib /usr/local/lib64 /usr/lib64 ENV LD_LIBRARY_PATH
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)
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endif()
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mark_as_advanced(${_prefix}_${_library}_LIBRARY)
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set(${LIBRARIES} ${${LIBRARIES}} ${${_prefix}_${_library}_LIBRARY})
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set(_libraries_found ${${_prefix}_${_library}_LIBRARY})
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endif()
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endforeach()
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if(_libraries_found)
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set(_libraries_found ${${LIBRARIES}})
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endif()
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# Test this combination of libraries with the Fortran/f2c interface.
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# We test the Fortran interface first as it is well standardized.
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if(_libraries_found AND NOT _libraries_work)
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set(${DEFINITIONS} "-D${_prefix}_USE_F2C")
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set(${LIBRARIES} ${_libraries_found})
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# Some C++ linkers require the f2c library to link with Fortran libraries.
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# I do not know which ones, thus I just add the f2c library if it is available.
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find_dependency( F2C QUIET )
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if ( F2C_FOUND )
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set(${DEFINITIONS} ${${DEFINITIONS}} ${F2C_DEFINITIONS})
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set(${LIBRARIES} ${${LIBRARIES}} ${F2C_LIBRARIES})
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endif()
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set(CMAKE_REQUIRED_DEFINITIONS ${${DEFINITIONS}})
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set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}} ${_blas})
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#message("DEBUG: CMAKE_REQUIRED_DEFINITIONS = ${CMAKE_REQUIRED_DEFINITIONS}")
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#message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}")
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# Check if function exists with f2c calling convention (ie a trailing underscore)
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check_function_exists(${_name}_ ${_prefix}_${_name}_${_combined_name}_f2c_WORKS)
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set(CMAKE_REQUIRED_DEFINITIONS} "")
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set(CMAKE_REQUIRED_LIBRARIES "")
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mark_as_advanced(${_prefix}_${_name}_${_combined_name}_f2c_WORKS)
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set(_libraries_work ${${_prefix}_${_name}_${_combined_name}_f2c_WORKS})
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endif()
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# If not found, test this combination of libraries with a C interface.
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# A few implementations (ie ACML) provide a C interface. Unfortunately, there is no standard.
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if(_libraries_found AND NOT _libraries_work)
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set(${DEFINITIONS} "")
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set(${LIBRARIES} ${_libraries_found})
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set(CMAKE_REQUIRED_DEFINITIONS "")
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set(CMAKE_REQUIRED_LIBRARIES ${_flags} ${${LIBRARIES}} ${_blas})
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#message("DEBUG: CMAKE_REQUIRED_LIBRARIES = ${CMAKE_REQUIRED_LIBRARIES}")
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check_function_exists(${_name} ${_prefix}_${_name}${_combined_name}_WORKS)
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set(CMAKE_REQUIRED_LIBRARIES "")
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mark_as_advanced(${_prefix}_${_name}${_combined_name}_WORKS)
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set(_libraries_work ${${_prefix}_${_name}${_combined_name}_WORKS})
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endif()
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# on failure
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if(NOT _libraries_work)
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set(${DEFINITIONS} "")
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set(${LIBRARIES} FALSE)
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endif()
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#message("DEBUG: ${DEFINITIONS} = ${${DEFINITIONS}}")
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#message("DEBUG: ${LIBRARIES} = ${${LIBRARIES}}")
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endmacro()
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#
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# main
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#
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# LAPACK requires BLAS
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if(LAPACK_FIND_QUIETLY OR NOT LAPACK_FIND_REQUIRED)
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find_dependency(BLAS)
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else()
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find_dependency(BLAS REQUIRED)
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endif()
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if (NOT BLAS_FOUND)
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message(STATUS "LAPACK requires BLAS.")
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set(LAPACK_FOUND FALSE)
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# Is it already configured?
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elseif (LAPACK_LIBRARIES_DIR OR LAPACK_LIBRARIES)
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set(LAPACK_FOUND TRUE)
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else()
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# reset variables
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set( LAPACK_INCLUDE_DIR "" )
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set( LAPACK_DEFINITIONS "" )
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set( LAPACK_LINKER_FLAGS "" ) # unused (yet)
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set( LAPACK_LIBRARIES "" )
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set( LAPACK_LIBRARIES_DIR "" )
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#
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# If Unix, search for LAPACK function in possible libraries
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#
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#intel mkl lapack?
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if(NOT LAPACK_LIBRARIES)
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check_lapack_libraries(
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LAPACK_DEFINITIONS
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LAPACK_LIBRARIES
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LAPACK
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cheev
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""
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"mkl_lapack"
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"${BLAS_LIBRARIES}"
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"${CGAL_TAUCS_LIBRARIES_DIR} ENV LAPACK_LIB_DIR"
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)
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endif()
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#acml lapack?
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if(NOT LAPACK_LIBRARIES)
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check_lapack_libraries(
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LAPACK_DEFINITIONS
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LAPACK_LIBRARIES
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LAPACK
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cheev
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""
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"acml"
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"${BLAS_LIBRARIES}"
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"${CGAL_TAUCS_LIBRARIES_DIR} ENV LAPACK_LIB_DIR"
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)
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endif()
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# Apple LAPACK library?
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if(NOT LAPACK_LIBRARIES)
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check_lapack_libraries(
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LAPACK_DEFINITIONS
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LAPACK_LIBRARIES
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LAPACK
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cheev
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""
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"Accelerate"
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"${BLAS_LIBRARIES}"
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"${CGAL_TAUCS_LIBRARIES_DIR} ENV LAPACK_LIB_DIR"
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)
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endif()
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if ( NOT LAPACK_LIBRARIES )
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check_lapack_libraries(
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LAPACK_DEFINITIONS
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LAPACK_LIBRARIES
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LAPACK
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cheev
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""
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"vecLib"
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"${BLAS_LIBRARIES}"
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"${CGAL_TAUCS_LIBRARIES_DIR} ENV LAPACK_LIB_DIR"
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)
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endif ()
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# Generic LAPACK library?
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# This configuration *must* be the last try as this library is notably slow.
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if ( NOT LAPACK_LIBRARIES )
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check_lapack_libraries(
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LAPACK_DEFINITIONS
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LAPACK_LIBRARIES
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LAPACK
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cheev
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""
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"lapack"
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"${BLAS_LIBRARIES}"
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"${CGAL_TAUCS_LIBRARIES_DIR} ENV LAPACK_LIB_DIR"
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)
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endif()
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if(LAPACK_LIBRARIES_DIR OR LAPACK_LIBRARIES)
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set(LAPACK_FOUND TRUE)
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else()
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set(LAPACK_FOUND FALSE)
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endif()
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if(NOT LAPACK_FIND_QUIETLY)
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if(LAPACK_FOUND)
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message(STATUS "A library with LAPACK API found.")
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else()
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if(LAPACK_FIND_REQUIRED)
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message(FATAL_ERROR "A required library with LAPACK API not found. Please specify library location.")
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else()
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message(STATUS "A library with LAPACK API not found. Please specify library location.")
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endif()
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endif()
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endif()
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# Add variables to cache
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set( LAPACK_INCLUDE_DIR "${LAPACK_INCLUDE_DIR}"
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CACHE PATH "Directories containing the LAPACK header files" FORCE )
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set( LAPACK_DEFINITIONS "${LAPACK_DEFINITIONS}"
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CACHE STRING "Compilation options to use LAPACK" FORCE )
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set( LAPACK_LINKER_FLAGS "${LAPACK_LINKER_FLAGS}"
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CACHE STRING "Linker flags to use LAPACK" FORCE )
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set( LAPACK_LIBRARIES "${LAPACK_LIBRARIES}"
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CACHE FILEPATH "LAPACK libraries name" FORCE )
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set( LAPACK_LIBRARIES_DIR "${LAPACK_LIBRARIES_DIR}"
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CACHE PATH "Directories containing the LAPACK libraries" FORCE )
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#message("DEBUG: LAPACK_INCLUDE_DIR = ${LAPACK_INCLUDE_DIR}")
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#message("DEBUG: LAPACK_DEFINITIONS = ${LAPACK_DEFINITIONS}")
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#message("DEBUG: LAPACK_LINKER_FLAGS = ${LAPACK_LINKER_FLAGS}")
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#message("DEBUG: LAPACK_LIBRARIES = ${LAPACK_LIBRARIES}")
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#message("DEBUG: LAPACK_LIBRARIES_DIR = ${LAPACK_LIBRARIES_DIR}")
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#message("DEBUG: LAPACK_FOUND = ${LAPACK_FOUND}")
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endif()
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