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CMake: use import targets for configuring Trilinos #15256

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CMake: use import targets for configuring Trilinos #15256

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168 changes: 47 additions & 121 deletions cmake/modules/FindDEAL_II_TRILINOS.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -19,22 +19,18 @@
# This module exports:
#
# TRILINOS_DIR
# TRILINOS_INCLUDE_DIRS
# TRILINOS_LIBRARIES
# TRILINOS_LINKER_FLAGS
# TRILINOS_VERSION
# TRILINOS_VERSION_MAJOR
# TRILINOS_VERSION_MINOR
# TRILINOS_VERSION_SUBMINOR
# TRILINOS_WITH_MPI
# TRILINOS_WITH_NO_64BITS_INDICES
# TRILINOS_WITH_NO_32BITS_INDICES
#

set(TRILINOS_DIR "" CACHE PATH "An optional hint to a Trilinos installation")
set_if_empty(TRILINOS_DIR "$ENV{TRILINOS_DIR}")

# silence a warning when including FindKOKKOS.cmake
set(CMAKE_CXX_EXTENSIONS OFF)

#
# Include the trilinos package configuration:
#
Expand All @@ -52,7 +48,17 @@ find_package(TRILINOS_CONFIG
)


if(DEFINED Trilinos_VERSION)
set(_target Trilinos::all_libs)
process_feature(TRILINOS
TARGETS REQUIRED _target
CLEAR
TRILINOS_CONFIG_DIR EPETRA_CONFIG_H SACADO_CMATH_HPP ${_libraries}
SACADO_CONFIG_H
TRILINOS_CXX_SUPPORTS_SACADO_COMPLEX_RAD
)


if(TRILINOS_FOUND)
#
# Extract version numbers:
#
Expand All @@ -66,129 +72,49 @@ if(DEFINED Trilinos_VERSION)
"^[0-9]+\\.([0-9]+).*$" "\\1"
TRILINOS_VERSION_MINOR "${Trilinos_VERSION}")

# If there is no subminor number,
# TRILINOS_VERSION_SUBMINOR is set to an empty string.
# If that is the case, set the subminor number to zero
# If there is no subminor number, TRILINOS_VERSION_SUBMINOR is set to an
# empty string. If that is the case, set the subminor number to zero
string(REGEX REPLACE
"^[0-9]+\\.[0-9]+\\.?(([0-9]+)?).*$" "\\1"
TRILINOS_VERSION_SUBMINOR "${Trilinos_VERSION}")
if("${TRILINOS_VERSION_SUBMINOR}" STREQUAL "")
set(TRILINOS_VERSION_SUBMINOR "0")
endif()
endif()

#
# Look for Epetra_config.h - we'll query it to determine MPI and 64bit
# indices support:
#
deal_ii_find_file(EPETRA_CONFIG_H Epetra_config.h
HINTS ${Trilinos_INCLUDE_DIRS}
NO_DEFAULT_PATH NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_PATH
NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH NO_CMAKE_FIND_ROOT_PATH
)

if(EXISTS ${EPETRA_CONFIG_H})
#
# Determine whether Trilinos was configured with MPI and 64bit indices:
#
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_MPI_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+HAVE_MPI")
if("${EPETRA_MPI_STRING}" STREQUAL "")
set(TRILINOS_WITH_MPI FALSE)
else()
set(TRILINOS_WITH_MPI TRUE)
endif()
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_32BIT_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+EPETRA_NO_32BIT_GLOBAL_INDICES")
if("${EPETRA_64BIT_STRING}" STREQUAL "")
set(TRILINOS_WITH_NO_32BITS_INDICES TRUE)
else()
set(TRILINOS_WITH_NO_32BITS_INDICES FALSE)
endif()
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_64BIT_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+EPETRA_NO_64BIT_GLOBAL_INDICES")
if("${EPETRA_64BIT_STRING}" STREQUAL "")
set(TRILINOS_WITH_NO_64BITS_INDICES TRUE)
else()
set(TRILINOS_WITH_NO_64BITS_INDICES FALSE)
endif()
endif()


#
# *Boy* Sanitize variables that are exported by TrilinosConfig.cmake...
#
# Especially deduplicate stuff...
#
remove_duplicates(Trilinos_LIBRARIES REVERSE)
remove_duplicates(Trilinos_TPL_LIBRARIES REVERSE)

remove_duplicates(Trilinos_INCLUDE_DIRS)
string(REGEX REPLACE
"(lib64|lib)\\/cmake\\/Trilinos\\/\\.\\.\\/\\.\\.\\/\\.\\.\\/" ""
Trilinos_INCLUDE_DIRS "${Trilinos_INCLUDE_DIRS}"
)

remove_duplicates(Trilinos_TPL_INCLUDE_DIRS)

if(TARGET Kokkos::kokkos)
get_property(KOKKOS_COMPILE_FLAGS_FULL TARGET Kokkos::kokkos PROPERTY INTERFACE_COMPILE_OPTIONS)
string(REGEX REPLACE "\\$<\\$<COMPILE_LANGUAGE:CXX>:([^>]*)>" "\\1" KOKKOS_COMPILE_FLAGS "${KOKKOS_COMPILE_FLAGS_FULL}")
string(REPLACE ";" " " KOKKOS_COMPILE_FLAGS "${KOKKOS_COMPILE_FLAGS}")

#
# Extract missing openmp linker options from the
# "INTERFACE_LINK_LIBRARIES" property of the Kokkos::kokkos target:
# Look for Epetra_config.h - we'll query it to determine MPI and 64bit
# indices support:
#
set(_kokkos_openmp_flags)
get_property(_libraries TARGET Kokkos::kokkos PROPERTY INTERFACE_LINK_LIBRARIES)
foreach(_entry ${_libraries})
if(${_entry} MATCHES "^-f?openmp")
add_flags(_kokkos_openmp_flags "${_entry}")
endif()
endforeach()
deal_ii_find_file(EPETRA_CONFIG_H Epetra_config.h
HINTS ${Trilinos_INCLUDE_DIRS}
NO_DEFAULT_PATH NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_PATH
NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH NO_CMAKE_FIND_ROOT_PATH
)

# Some Kokkos versions included in Trilinos before 13.2.0 add "-x cuda" when
# using clang++ as compiler even if Kokkos has not been configured with Cuda
# support. Simply strip that flag from what we are using in that case.
if(NOT Kokkos_ENABLE_CUDA)
string(REPLACE "-x cuda" "" KOKKOS_COMPILE_FLAGS "${KOKKOS_COMPILE_FLAGS}")
if(EXISTS ${EPETRA_CONFIG_H})
#
# Determine whether Trilinos was configured with MPI and 64bit indices:
#
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_MPI_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+HAVE_MPI")
if("${EPETRA_MPI_STRING}" STREQUAL "")
set(TRILINOS_WITH_MPI FALSE)
else()
set(TRILINOS_WITH_MPI TRUE)
endif()
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_32BIT_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+EPETRA_NO_32BIT_GLOBAL_INDICES")
if("${EPETRA_64BIT_STRING}" STREQUAL "")
set(TRILINOS_WITH_NO_32BITS_INDICES TRUE)
else()
set(TRILINOS_WITH_NO_32BITS_INDICES FALSE)
endif()
file(STRINGS "${EPETRA_CONFIG_H}" EPETRA_64BIT_STRING
REGEX "^[ \t]*#[ \t]*define[ \t]+EPETRA_NO_64BIT_GLOBAL_INDICES")
if("${EPETRA_64BIT_STRING}" STREQUAL "")
set(TRILINOS_WITH_NO_64BITS_INDICES TRUE)
else()
set(TRILINOS_WITH_NO_64BITS_INDICES FALSE)
endif()
endif()
endif()

#
# We'd like to have the full library names but the Trilinos package only
# exports a list with short names...
# So we check again for every lib and store the full path:
#
set(_libraries "")
foreach(_library ${Trilinos_LIBRARIES})
list(APPEND _libraries TRILINOS_LIBRARY_${_library})
deal_ii_find_library(TRILINOS_LIBRARY_${_library}
NAMES ${_library}
HINTS ${Trilinos_LIBRARY_DIRS}
NO_DEFAULT_PATH
NO_CMAKE_ENVIRONMENT_PATH
NO_CMAKE_PATH
NO_SYSTEM_ENVIRONMENT_PATH
NO_CMAKE_SYSTEM_PATH
NO_CMAKE_FIND_ROOT_PATH
)
endforeach()

process_feature(TRILINOS
LIBRARIES
REQUIRED ${_libraries}
OPTIONAL Trilinos_TPL_LIBRARIES MPI_CXX_LIBRARIES
INCLUDE_DIRS
REQUIRED Trilinos_INCLUDE_DIRS
OPTIONAL Trilinos_TPL_INCLUDE_DIRS
CXX_FLAGS
OPTIONAL KOKKOS_COMPILE_FLAGS
LINKER_FLAGS
OPTIONAL Trilinos_EXTRA_LD_FLAGS _kokkos_openmp_flags
CLEAR
TRILINOS_CONFIG_DIR EPETRA_CONFIG_H SACADO_CMATH_HPP ${_libraries}
SACADO_CONFIG_H
TRILINOS_CXX_SUPPORTS_SACADO_COMPLEX_RAD
)