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FindCBLAS.cmake
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###
#
# @copyright (c) 2009-2014 The University of Tennessee and The University
# of Tennessee Research Foundation.
# All rights reserved.
# @copyright (c) 2012-2016 Inria. All rights reserved.
# @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
# @copyright (c) 2022 King Abdullah University of Science and Technology (KAUST).
# All rights reserved.
#
###
#
# - Find CBLAS include dirs and libraries
# Use this module by invoking find_package with the form:
# find_package(CBLAS
# [REQUIRED] # Fail with error if cblas is not found
# [COMPONENTS <comp1> <comp2> ...] # dependencies
# )
#
# CBLAS depends on the following libraries:
# - BLAS
#
# This module finds headers and cblas library.
# Results are reported in variables:
# CBLAS_FOUND - True if headers and requested libraries were found
# CBLAS_LINKER_FLAGS - list of required linker flags (excluding -l and -L)
# CBLAS_INCLUDE_DIRS - cblas include directories
# CBLAS_LIBRARY_DIRS - Link directories for cblas libraries
# CBLAS_LIBRARIES - cblas component libraries to be linked
# CBLAS_INCLUDE_DIRS_DEP - cblas + dependencies include directories
# CBLAS_LIBRARY_DIRS_DEP - cblas + dependencies link directories
# CBLAS_LIBRARIES_DEP - cblas libraries + dependencies
# CBLAS_HAS_ZGEMM3M - True if cblas contains zgemm3m fast complex mat-mat product
#
# The user can give specific paths where to find the libraries adding cmake
# options at configure (ex: cmake path/to/project -DCBLAS_DIR=path/to/cblas):
# CBLAS_DIR - Where to find the base directory of cblas
# CBLAS_INCDIR - Where to find the header files
# CBLAS_LIBDIR - Where to find the library files
# The module can also look for the following environment variables if paths
# are not given as cmake variable: CBLAS_DIR, CBLAS_INCDIR, CBLAS_LIBDIR
#
# CBLAS could be directly embedded in BLAS library (ex: Intel MKL) so that
# we test a cblas function with the blas libraries found and set CBLAS
# variables to BLAS ones if test is successful. To skip this feature and
# look for a stand alone cblas, please add the following in your
# CMakeLists.txt before to call find_package(CBLAS):
# set(CBLAS_STANDALONE TRUE)
###
# We handle different modes to find the dependency
#
# - Detection if already installed on the system
# - CBLAS libraries can be detected from different ways
# Here is the order of precedence:
# 1) we look in cmake variable CBLAS_LIBDIR or CBLAS_DIR (we guess the libdirs) if defined
# 2) we look in environment variable CBLAS_LIBDIR or CBLAS_DIR (we guess the libdirs) if defined
# 3) we look in common environnment variables depending on the system (INCLUDE, C_INCLUDE_PATH, CPATH - LIB, DYLD_LIBRARY_PATH, LD_LIBRARY_PATH)
# 4) we look in common system paths depending on the system, see for example paths contained in the following cmake variables:
# - CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES, CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES
# - CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES, CMAKE_C_IMPLICIT_LINK_DIRECTORIES
#
#=============================================================================
# Copyright 2012-2013 Inria
# Copyright 2012-2013 Emmanuel Agullo
# Copyright 2012-2013 Mathieu Faverge
# Copyright 2012 Cedric Castagnede
# Copyright 2013-2016 Florent Pruvost
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file ECRC-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 Ecrc, substitute the full
# License text for the above reference.)
macro(Find_Cblas_Header _header_name _extra_paths)
# Looking for include
# -------------------
# Add system include paths to search include
# ------------------------------------------
unset(_inc_env)
set(ENV_CBLAS_DIR "$ENV{CBLAS_DIR}")
set(ENV_CBLAS_INCDIR "$ENV{CBLAS_INCDIR}")
if (ENV_CBLAS_INCDIR)
list(APPEND _inc_env "${ENV_CBLAS_INCDIR}")
elseif (ENV_CBLAS_DIR)
list(APPEND _inc_env "${ENV_CBLAS_DIR}")
list(APPEND _inc_env "${ENV_CBLAS_DIR}/include")
else ()
# system variables
if (WIN32)
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
list(APPEND _inc_env "${_path_env}")
else ()
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{C_INCLUDE_PATH}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{CPATH}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE_PATH}")
list(APPEND _inc_env "${_path_env}")
endif ()
endif ()
list(APPEND _inc_env "${CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES}")
list(APPEND _inc_env "${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES}")
list(APPEND _inc_env "${_extra_paths}")
list(APPEND _inc_env "${_extra_paths}/include")
list(REMOVE_DUPLICATES _inc_env)
# set paths where to look for
set(PATH_TO_LOOK_FOR "${_inc_env}")
# Try to find the fftw header in the given paths
# -------------------------------------------------
# call cmake macro to find the header path
if (CBLAS_INCDIR)
set(CBLAS_${_header_name}_DIRS "CBLAS_${_header_name}_DIRS-NOTFOUND")
find_path(CBLAS_${_header_name}_DIRS
NAMES ${_header_name}
HINTS ${CBLAS_INCDIR})
else ()
if (CBLAS_DIR)
set(CBLAS_${_header_name}_DIRS "CBLAS_${_header_name}_DIRS-NOTFOUND")
find_path(CBLAS_${_header_name}_DIRS
NAMES ${_header_name}
HINTS ${CBLAS_DIR}
PATH_SUFFIXES "include")
else ()
set(CBLAS_${_header_name}_DIRS "CBLAS_${_header_name}_DIRS-NOTFOUND")
find_path(CBLAS_${_header_name}_DIRS
NAMES ${_header_name}
HINTS ${PATH_TO_LOOK_FOR})
endif ()
endif ()
mark_as_advanced(CBLAS_${_header_name}_DIRS)
# If found, add path to cmake variable
# ------------------------------------
if (CBLAS_${_header_name}_DIRS)
set(CBLAS_INCLUDE_DIRS "${CBLAS_${_header_name}_DIRS}")
else ()
set(CBLAS_INCLUDE_DIRS "CBLAS_INCLUDE_DIRS-NOTFOUND")
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for CBLAS -- ${_header_name} not found")
endif ()
endif ()
endmacro()
if (NOT CBLAS_FOUND)
set(CBLAS_DIR "" CACHE PATH "Installation directory of CBLAS library")
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "A cache variable, namely CBLAS_DIR, has been set to specify the install directory of CBLAS")
endif ()
endif ()
# CBLAS depends on BLAS anyway, try to find it
if (NOT BLAS_FOUND)
if (CBLAS_FIND_REQUIRED)
find_package(BLASEXT REQUIRED)
else ()
find_package(BLASEXT)
endif ()
endif ()
# find CBLAS
if (BLAS_FOUND)
# find header
Find_Cblas_Header("cblas.h" "${BLAS_DIR_FOUND}")
if (NOT CBLAS_STANDALONE)
# check if a cblas function exists in the BLAS lib
# this can be the case with libs such as MKL, ACML
include(CheckFunctionExists)
set(CMAKE_REQUIRED_LIBRARIES "${BLAS_LINKER_FLAGS};${BLAS_LIBRARIES}")
set(CMAKE_REQUIRED_FLAGS "${BLAS_COMPILER_FLAGS}")
unset(CBLAS_WORKS CACHE)
check_function_exists(cblas_dscal CBLAS_WORKS)
check_function_exists(cblas_zgemm3m CBLAS_ZGEMM3M_FOUND)
mark_as_advanced(CBLAS_WORKS)
set(CMAKE_REQUIRED_LIBRARIES)
if (CBLAS_WORKS)
# Check for faster complex GEMM routine
# (only C/Z, no S/D version)
if (CBLAS_ZGEMM3M_FOUND)
add_definitions(-DCBLAS_HAS_ZGEMM3M -DCBLAS_HAS_CGEMM3M)
endif ()
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for cblas: test with blas succeeds")
endif ()
# test succeeds: CBLAS is in BLAS
set(CBLAS_LIBRARIES "${BLAS_LIBRARIES}")
if (BLAS_LIBRARY_DIRS)
set(CBLAS_LIBRARY_DIRS "${BLAS_LIBRARY_DIRS}")
endif ()
if (BLAS_INCLUDE_DIRS)
set(CBLAS_INCLUDE_DIRS "${BLAS_INCLUDE_DIRS}")
endif ()
if (BLAS_LINKER_FLAGS)
set(CBLAS_LINKER_FLAGS "${BLAS_LINKER_FLAGS}")
endif ()
endif ()
endif (NOT CBLAS_STANDALONE)
if (CBLAS_STANDALONE OR NOT CBLAS_WORKS)
if (NOT CBLAS_WORKS AND NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for cblas : test with blas fails")
endif ()
# test fails: try to find CBLAS lib exterior to BLAS
# Try to find CBLAS lib
#######################
# Looking for include
# -------------------
# Add system include paths to search include
# ------------------------------------------
unset(_inc_env)
set(ENV_CBLAS_DIR "$ENV{CBLAS_DIR}")
set(ENV_CBLAS_INCDIR "$ENV{CBLAS_INCDIR}")
if (ENV_CBLAS_INCDIR)
list(APPEND _inc_env "${ENV_CBLAS_INCDIR}")
elseif (ENV_CBLAS_DIR)
list(APPEND _inc_env "${ENV_CBLAS_DIR}")
list(APPEND _inc_env "${ENV_CBLAS_DIR}/include")
list(APPEND _inc_env "${ENV_CBLAS_DIR}/include/cblas")
else ()
if (WIN32)
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
list(APPEND _inc_env "${_path_env}")
else ()
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{C_INCLUDE_PATH}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{CPATH}")
list(APPEND _inc_env "${_path_env}")
string(REPLACE ":" ";" _path_env "$ENV{INCLUDE_PATH}")
list(APPEND _inc_env "${_path_env}")
endif ()
endif ()
list(APPEND _inc_env "${CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES}")
list(APPEND _inc_env "${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES}")
list(REMOVE_DUPLICATES _inc_env)
# Try to find the cblas header in the given paths
# -------------------------------------------------
# call cmake macro to find the header path
if (CBLAS_INCDIR)
set(CBLAS_cblas.h_DIRS "CBLAS_cblas.h_DIRS-NOTFOUND")
find_path(CBLAS_cblas.h_DIRS
NAMES cblas.h
HINTS ${CBLAS_INCDIR})
else ()
if (CBLAS_DIR)
set(CBLAS_cblas.h_DIRS "CBLAS_cblas.h_DIRS-NOTFOUND")
find_path(CBLAS_cblas.h_DIRS
NAMES cblas.h
HINTS ${CBLAS_DIR}
PATH_SUFFIXES "include" "include/cblas")
else ()
set(CBLAS_cblas.h_DIRS "CBLAS_cblas.h_DIRS-NOTFOUND")
find_path(CBLAS_cblas.h_DIRS
NAMES cblas.h
HINTS ${_inc_env}
PATH_SUFFIXES "cblas")
endif ()
endif ()
mark_as_advanced(CBLAS_cblas.h_DIRS)
# If found, add path to cmake variable
# ------------------------------------
if (CBLAS_cblas.h_DIRS)
set(CBLAS_INCLUDE_DIRS "${CBLAS_cblas.h_DIRS}")
else ()
set(CBLAS_INCLUDE_DIRS "CBLAS_INCLUDE_DIRS-NOTFOUND")
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for cblas -- cblas.h not found")
endif ()
endif ()
# Looking for lib
# ---------------
# Add system library paths to search lib
# --------------------------------------
unset(_lib_env)
set(ENV_CBLAS_LIBDIR "$ENV{CBLAS_LIBDIR}")
if (ENV_CBLAS_LIBDIR)
list(APPEND _lib_env "${ENV_CBLAS_LIBDIR}")
elseif (ENV_CBLAS_DIR)
list(APPEND _lib_env "${ENV_CBLAS_DIR}")
list(APPEND _lib_env "${ENV_CBLAS_DIR}/lib")
else ()
if (WIN32)
string(REPLACE ":" ";" _lib_env "$ENV{LIB}")
else ()
if (APPLE)
string(REPLACE ":" ";" _lib_env "$ENV{DYLD_LIBRARY_PATH}")
else ()
string(REPLACE ":" ";" _lib_env "$ENV{LD_LIBRARY_PATH}")
endif ()
list(APPEND _lib_env "${CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES}")
list(APPEND _lib_env "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}")
endif ()
endif ()
list(REMOVE_DUPLICATES _lib_env)
# Try to find the cblas lib in the given paths
# ----------------------------------------------
# call cmake macro to find the lib path
if (CBLAS_LIBDIR)
set(CBLAS_cblas_LIBRARY "CBLAS_cblas_LIBRARY-NOTFOUND")
find_library(CBLAS_cblas_LIBRARY
NAMES cblas
HINTS ${CBLAS_LIBDIR})
else ()
if (CBLAS_DIR)
set(CBLAS_cblas_LIBRARY "CBLAS_cblas_LIBRARY-NOTFOUND")
find_library(CBLAS_cblas_LIBRARY
NAMES cblas
HINTS ${CBLAS_DIR}
PATH_SUFFIXES lib lib32 lib64)
else ()
set(CBLAS_cblas_LIBRARY "CBLAS_cblas_LIBRARY-NOTFOUND")
find_library(CBLAS_cblas_LIBRARY
NAMES cblas
HINTS ${_lib_env})
endif ()
endif ()
mark_as_advanced(CBLAS_cblas_LIBRARY)
# If found, add path to cmake variable
# ------------------------------------
if (CBLAS_cblas_LIBRARY)
get_filename_component(cblas_lib_path "${CBLAS_cblas_LIBRARY}" PATH)
# set cmake variables
set(CBLAS_LIBRARIES "${CBLAS_cblas_LIBRARY}")
set(CBLAS_LIBRARY_DIRS "${cblas_lib_path}")
else ()
set(CBLAS_LIBRARIES "CBLAS_LIBRARIES-NOTFOUND")
set(CBLAS_LIBRARY_DIRS "CBLAS_LIBRARY_DIRS-NOTFOUND")
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for cblas -- lib cblas not found")
endif ()
endif ()
# check a function to validate the find
if (CBLAS_LIBRARIES)
set(REQUIRED_INCDIRS)
set(REQUIRED_LDFLAGS)
set(REQUIRED_LIBDIRS)
set(REQUIRED_LIBS)
# CBLAS
if (CBLAS_INCLUDE_DIRS)
set(REQUIRED_INCDIRS "${CBLAS_INCLUDE_DIRS}")
endif ()
if (CBLAS_LIBRARY_DIRS)
set(REQUIRED_LIBDIRS "${CBLAS_LIBRARY_DIRS}")
endif ()
set(REQUIRED_LIBS "${CBLAS_LIBRARIES}")
# BLAS
if (BLAS_INCLUDE_DIRS)
list(APPEND REQUIRED_INCDIRS "${BLAS_INCLUDE_DIRS}")
endif ()
if (BLAS_LIBRARY_DIRS)
list(APPEND REQUIRED_LIBDIRS "${BLAS_LIBRARY_DIRS}")
endif ()
list(APPEND REQUIRED_LIBS "${BLAS_LIBRARIES}")
if (BLAS_LINKER_FLAGS)
list(APPEND REQUIRED_LDFLAGS "${BLAS_LINKER_FLAGS}")
endif ()
# set required libraries for link
set(CMAKE_REQUIRED_INCLUDES "${REQUIRED_INCDIRS}")
set(CMAKE_REQUIRED_LIBRARIES)
list(APPEND CMAKE_REQUIRED_LIBRARIES "${REQUIRED_LDFLAGS}")
foreach (lib_dir ${REQUIRED_LIBDIRS})
list(APPEND CMAKE_REQUIRED_LIBRARIES "-L${lib_dir}")
endforeach ()
list(APPEND CMAKE_REQUIRED_LIBRARIES "${REQUIRED_LIBS}")
string(REGEX REPLACE "^ -" "-" CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
# test link
unset(CBLAS_WORKS CACHE)
include(CheckFunctionExists)
check_function_exists(cblas_dscal CBLAS_WORKS)
mark_as_advanced(CBLAS_WORKS)
if (CBLAS_WORKS)
# Check for faster complex GEMM routine
# (only C/Z, no S/D version)
check_function_exists(cblas_zgemm3m CBLAS_ZGEMM3M_FOUND)
if (CBLAS_ZGEMM3M_FOUND)
add_definitions(-DCBLAS_HAS_ZGEMM3M -DCBLAS_HAS_CGEMM3M)
endif ()
# save link with dependencies
set(CBLAS_LIBRARIES_DEP "${REQUIRED_LIBS}")
set(CBLAS_LIBRARY_DIRS_DEP "${REQUIRED_LIBDIRS}")
set(CBLAS_INCLUDE_DIRS_DEP "${REQUIRED_INCDIRS}")
set(CBLAS_LINKER_FLAGS "${REQUIRED_LDFLAGS}")
list(REMOVE_DUPLICATES CBLAS_LIBRARY_DIRS_DEP)
list(REMOVE_DUPLICATES CBLAS_INCLUDE_DIRS_DEP)
list(REMOVE_DUPLICATES CBLAS_LINKER_FLAGS)
else ()
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "Looking for cblas : test of cblas_dscal with cblas and blas libraries fails")
message(STATUS "CMAKE_REQUIRED_LIBRARIES: ${CMAKE_REQUIRED_LIBRARIES}")
message(STATUS "CMAKE_REQUIRED_INCLUDES: ${CMAKE_REQUIRED_INCLUDES}")
message(STATUS "Check in CMakeFiles/CMakeError.log to figure out why it fails")
endif ()
endif ()
set(CMAKE_REQUIRED_INCLUDES)
set(CMAKE_REQUIRED_FLAGS)
set(CMAKE_REQUIRED_LIBRARIES)
endif (CBLAS_LIBRARIES)
endif (CBLAS_STANDALONE OR NOT CBLAS_WORKS)
else (BLAS_FOUND)
if (NOT CBLAS_FIND_QUIETLY)
message(STATUS "CBLAS requires BLAS but BLAS has not been found."
"Please look for BLAS first.")
endif ()
endif (BLAS_FOUND)
if (CBLAS_LIBRARIES)
list(GET CBLAS_LIBRARIES 0 first_lib)
get_filename_component(first_lib_path "${first_lib}" PATH)
if (${first_lib_path} MATCHES "(/lib(32|64)?$)|(/lib/intel64$|/lib/ia32$)")
string(REGEX REPLACE "(/lib(32|64)?$)|(/lib/intel64$|/lib/ia32$)" "" not_cached_dir "${first_lib_path}")
set(CBLAS_DIR_FOUND "${not_cached_dir}" CACHE PATH "Installation directory of CBLAS library" FORCE)
else ()
set(CBLAS_DIR_FOUND "${first_lib_path}" CACHE PATH "Installation directory of CBLAS library" FORCE)
endif ()
endif ()
mark_as_advanced(CBLAS_DIR)
mark_as_advanced(CBLAS_DIR_FOUND)
# check that CBLAS has been found
# -------------------------------
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(CBLAS DEFAULT_MSG
CBLAS_LIBRARIES
CBLAS_WORKS)