# cmake script for finding MUMPS sparse direct solver
# If libraries are already defined, do nothing
IF(SCALAPACK_LIBRARIES)
SET(SCALAPACK_FOUND TRUE)
RETURN()
ENDIF()
message(STATUS "Finding SCALAPACK")
SET(SCALAPACKLIB
"${SCALAPACKROOT}"
"${SCALAPACKROOT}/lib"
"$ENV{SCALAPACKROOT}"
"$ENV{SCALAPACKROOT}/lib"
"$ENV{SCALAPACK_ROOT}"
"$ENV{SCALAPACK_ROOT}/lib"
"${CMAKE_SOURCE_DIR}/scalapack"
"${CMAKE_SOURCE_DIR}/scalapack/lib")
FIND_LIBRARY(SCALAPACK_LIBRARIES
NAMES
"scalapack" "scalapack-pvm" "scalapack-mpi" "scalapack-mpich"
"scalapack-mpich2" "scalapack-openmpi" "scalapack-lam"
HINTS
${SCALAPACKLIB})
IF (SCALAPACK_LIBRARIES)
MESSAGE(STATUS "Checking if BLACS library is needed by SCALAPACK")
# Check if separate BLACS libraries are needed
UNSET(BLACS_EMBEDDED)
INCLUDE(${CMAKE_ROOT}/Modules/CheckFortranFunctionExists.cmake)
SET(CMAKE_REQUIRED_LIBRARIES_OLD ${CMAKE_REQUIRED_LIBRARIES})
SET(CMAKE_REQUIRED_LIBRARIES
${CMAKE_Fortran_REQUIRED_LIBRARIES}
${SCALAPACK_LIBRARIES})
CHECK_FORTRAN_FUNCTION_EXISTS("blacs_gridinit" BLACS_EMBEDDED)
SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES_OLD})
IF(NOT BLACS_EMBEDDED)
MESSAGE(STATUS "Checking if BLACS library is needed by SCALAPACK -- yes")
FIND_PACKAGE(BLACS ${SCALAPACK_FIND_QUIETLY})
IF(BLACS_FOUND)
SET(SCALAPACK_LIBRARIES ${SCALAPACK_LIBRARIES} ${BLACS_LIBRARIES})
SET(SCALAPACK_FOUND TRUE)
ELSE()
SET(SCALAPACK_FOUND FALSE)
MESSAGE(FATAL_ERROR "BLACS library not found, needed by found SCALAPACK library.")
ENDIF()
ELSE()
MESSAGE(STATUS "Checking if BLACS library is needed by SCALAPACK -- no")
SET(SCALAPACK_FOUND TRUE)
ENDIF()
ENDIF()
IF (SCALAPACK_FOUND)
IF (NOT SCALAPACK_FIND_QUIETLY)
MESSAGE(STATUS "A library with SCALAPACK API found.")
MESSAGE(STATUS "SCALAPACK libraries: ${SCALAPACK_LIBRARIES}")
ENDIF()
ELSE()
IF (SCALAPACK_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "SCALAPACK library not found.")
ENDIF()
ENDIF()
MARK_AS_ADVANCED(
BLACS_EMBEDDED
SCALAPACK_FOUND
SCALAPACK_LIBRARIES
SCALAPACKLIB
)
