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6fb3e5f176
Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style.
274 lines
9.5 KiB
CMake
274 lines
9.5 KiB
CMake
# 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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# 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} ${_libraries_found})
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# Some C++ linkers require the f2c library to link with Fortran libraries.
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# I do not know which ones, thus I just add the f2c library if it is available.
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find_package( F2C QUIET )
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if ( F2C_FOUND )
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set(${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_package(BLAS)
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else()
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find_package(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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