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FindPETSc.cmake
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# - Try to find PETSc
# Once done this will define
#
# PETSC_FOUND - system has PETSc
# PETSC_INCLUDES - the PETSc include directories
# PETSC_LIBRARIES - Link these to use PETSc
# PETSC_COMPILER - Compiler used by PETSc, helpful to find a compatible MPI
# PETSC_DEFINITIONS - Compiler switches for using PETSc
# PETSC_MPIEXEC - Executable for running MPI programs
# PETSC_VERSION - Version string (MAJOR.MINOR.SUBMINOR)
#
# Usage:
# find_package(PETSc COMPONENTS CXX) - required if build --with-clanguage=C++ --with-c-support=0
# find_package(PETSc COMPONENTS C) - standard behavior of checking build using a C compiler
# find_package(PETSc) - same as above
#
# Setting these changes the behavior of the search
# PETSC_DIR - directory in which PETSc resides
# PETSC_ARCH - build architecture
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
#
set(PETSC_VALID_COMPONENTS
C
CXX)
if(NOT PETSc_FIND_COMPONENTS)
set(PETSC_LANGUAGE_BINDINGS "C")
else()
# Right now, this is designed for compatability with the --with-clanguage option, so
# only allow one item in the components list.
list(LENGTH ${PETSc_FIND_COMPONENTS} components_length)
if(${components_length} GREATER 1)
message(FATAL_ERROR "Only one component for PETSc is allowed to be specified")
endif()
# This is a stub for allowing multiple components should that time ever come. Perhaps
# to also test Fortran bindings?
foreach(component ${PETSc_FIND_COMPONENTS})
list(FIND PETSC_VALID_COMPONENTS ${component} component_location)
if(${component_location} EQUAL -1)
message(FATAL_ERROR "\"${component}\" is not a valid PETSc component.")
else()
list(APPEND PETSC_LANGUAGE_BINDINGS ${component})
endif()
endforeach()
endif()
function (petsc_get_version)
if (EXISTS "${PETSC_DIR}/include/petscversion.h")
file (STRINGS "${PETSC_DIR}/include/petscversion.h" vstrings REGEX "#define PETSC_VERSION_(RELEASE|MAJOR|MINOR|SUBMINOR|PATCH) ")
foreach (line ${vstrings})
string (REGEX REPLACE " +" ";" fields ${line}) # break line into three fields (the first is always "#define")
list (GET fields 1 var)
list (GET fields 2 val)
set (${var} ${val} PARENT_SCOPE)
set (${var} ${val}) # Also in local scope so we have access below
endforeach ()
if (PETSC_VERSION_RELEASE)
set (PETSC_VERSION "${PETSC_VERSION_MAJOR}.${PETSC_VERSION_MINOR}.${PETSC_VERSION_SUBMINOR}p${PETSC_VERSION_PATCH}" PARENT_SCOPE)
else ()
# make dev version compare higher than any patch level of a released version
set (PETSC_VERSION "${PETSC_VERSION_MAJOR}.${PETSC_VERSION_MINOR}.${PETSC_VERSION_SUBMINOR}.99" PARENT_SCOPE)
endif ()
else ()
message (SEND_ERROR "PETSC_DIR can not be used, ${PETSC_DIR}/include/petscversion.h does not exist")
endif ()
endfunction ()
find_path (PETSC_DIR include/petsc.h
HINTS ENV PETSC_DIR
PATHS
# Debian paths
/usr/lib/petscdir/3.5.1 /usr/lib/petscdir/3.5
/usr/lib/petscdir/3.4.2 /usr/lib/petscdir/3.4
/usr/lib/petscdir/3.3 /usr/lib/petscdir/3.2 /usr/lib/petscdir/3.1
/usr/lib/petscdir/3.0.0 /usr/lib/petscdir/2.3.3 /usr/lib/petscdir/2.3.2
# MacPorts path
/opt/local/lib/petsc
$ENV{HOME}/petsc
DOC "PETSc Directory")
find_program (MAKE_EXECUTABLE NAMES make gmake)
if (PETSC_DIR AND NOT PETSC_ARCH)
set (_petsc_arches
$ENV{PETSC_ARCH} # If set, use environment variable first
linux-gnu-c-debug linux-gnu-c-opt # Debian defaults
x86_64-unknown-linux-gnu i386-unknown-linux-gnu)
set (petscconf "NOTFOUND" CACHE FILEPATH "Cleared" FORCE)
foreach (arch ${_petsc_arches})
if (NOT PETSC_ARCH)
find_path (petscconf petscconf.h
HINTS ${PETSC_DIR}
PATH_SUFFIXES ${arch}/include bmake/${arch}
NO_DEFAULT_PATH)
if (petscconf)
set (PETSC_ARCH "${arch}" CACHE STRING "PETSc build architecture")
endif (petscconf)
endif (NOT PETSC_ARCH)
endforeach (arch)
set (petscconf "NOTFOUND" CACHE INTERNAL "Scratch variable" FORCE)
endif (PETSC_DIR AND NOT PETSC_ARCH)
set (petsc_slaves LIBRARIES_SYS LIBRARIES_VEC LIBRARIES_MAT LIBRARIES_DM LIBRARIES_KSP LIBRARIES_SNES LIBRARIES_TS
INCLUDE_DIR INCLUDE_CONF)
include (FindPackageMultipass)
find_package_multipass (PETSc petsc_config_current
STATES DIR ARCH
DEPENDENTS INCLUDES LIBRARIES COMPILER MPIEXEC ${petsc_slaves})
# Determine whether the PETSc layout is old-style (through 2.3.3) or
# new-style (>= 3.0.0)
if (EXISTS "${PETSC_DIR}/${PETSC_ARCH}/lib/petsc/conf/petscvariables") # > 3.5
set (petsc_conf_rules "${PETSC_DIR}/lib/petsc/conf/rules")
set (petsc_conf_variables "${PETSC_DIR}/lib/petsc/conf/variables")
elseif (EXISTS "${PETSC_DIR}/${PETSC_ARCH}/include/petscconf.h") # > 2.3.3
set (petsc_conf_rules "${PETSC_DIR}/conf/rules")
set (petsc_conf_variables "${PETSC_DIR}/conf/variables")
elseif (EXISTS "${PETSC_DIR}/bmake/${PETSC_ARCH}/petscconf.h") # <= 2.3.3
set (petsc_conf_rules "${PETSC_DIR}/bmake/common/rules")
set (petsc_conf_variables "${PETSC_DIR}/bmake/common/variables")
elseif (PETSC_DIR)
message (SEND_ERROR "The pair PETSC_DIR=${PETSC_DIR} PETSC_ARCH=${PETSC_ARCH} do not specify a valid PETSc installation")
endif ()
if (petsc_conf_rules AND petsc_conf_variables AND NOT petsc_config_current)
petsc_get_version()
# Put variables into environment since they are needed to get
# configuration (petscvariables) in the PETSc makefile
set (ENV{PETSC_DIR} "${PETSC_DIR}")
set (ENV{PETSC_ARCH} "${PETSC_ARCH}")
# A temporary makefile to probe the PETSc configuration
set (petsc_config_makefile "${PROJECT_BINARY_DIR}/Makefile.petsc")
file (WRITE "${petsc_config_makefile}"
"## This file was autogenerated by FindPETSc.cmake
# PETSC_DIR = ${PETSC_DIR}
# PETSC_ARCH = ${PETSC_ARCH}
include ${petsc_conf_rules}
include ${petsc_conf_variables}
show :
\t-@echo -n \${\${VARIABLE}}
")
macro (PETSC_GET_VARIABLE name var)
set (${var} "NOTFOUND" CACHE INTERNAL "Cleared" FORCE)
execute_process (COMMAND ${MAKE_EXECUTABLE} --no-print-directory -f ${petsc_config_makefile} show VARIABLE=${name}
OUTPUT_VARIABLE ${var}
RESULT_VARIABLE petsc_return)
endmacro (PETSC_GET_VARIABLE)
petsc_get_variable (PETSC_LIB_DIR petsc_lib_dir)
petsc_get_variable (PETSC_EXTERNAL_LIB_BASIC petsc_libs_external)
petsc_get_variable (PETSC_CCPPFLAGS petsc_cpp_line)
petsc_get_variable (PETSC_INCLUDE petsc_include)
petsc_get_variable (PCC petsc_cc)
petsc_get_variable (PCC_FLAGS petsc_cc_flags)
petsc_get_variable (MPIEXEC petsc_mpiexec)
# We are done with the temporary Makefile, calling PETSC_GET_VARIABLE after this point is invalid!
file (REMOVE ${petsc_config_makefile})
include (ResolveCompilerPaths)
# Extract include paths and libraries from compile command line
resolve_includes (petsc_includes_all "${petsc_cpp_line}")
#on windows we need to make sure we're linking against the right
#runtime library
if (WIN32)
if (petsc_cc_flags MATCHES "-MT")
set(using_md False)
foreach(flag_var
CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if(${flag_var} MATCHES "/MD")
set(using_md True)
endif(${flag_var} MATCHES "/MD")
endforeach(flag_var)
if(${using_md} MATCHES "True")
message(WARNING "PETSc was built with /MT, but /MD is currently set.
See http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F")
endif(${using_md} MATCHES "True")
endif (petsc_cc_flags MATCHES "-MT")
endif (WIN32)
include (CorrectWindowsPaths)
convert_cygwin_path(petsc_lib_dir)
message (STATUS "petsc_lib_dir ${petsc_lib_dir}")
macro (PETSC_FIND_LIBRARY suffix name)
set (PETSC_LIBRARY_${suffix} "NOTFOUND" CACHE INTERNAL "Cleared" FORCE) # Clear any stale value, if we got here, we need to find it again
if (WIN32)
set (libname lib${name}) #windows expects "libfoo", linux expects "foo"
else (WIN32)
set (libname ${name})
endif (WIN32)
find_library (PETSC_LIBRARY_${suffix} NAMES ${libname} HINTS ${petsc_lib_dir} NO_DEFAULT_PATH)
set (PETSC_LIBRARIES_${suffix} "${PETSC_LIBRARY_${suffix}}")
mark_as_advanced (PETSC_LIBRARY_${suffix})
endmacro (PETSC_FIND_LIBRARY suffix name)
# Look for petscvec first, if it doesn't exist, we must be using single-library
petsc_find_library (VEC petscvec)
if (PETSC_LIBRARY_VEC)
petsc_find_library (SYS "petscsys;petsc") # libpetscsys is called libpetsc prior to 3.1 (when single-library was introduced)
petsc_find_library (MAT petscmat)
petsc_find_library (DM petscdm)
petsc_find_library (KSP petscksp)
petsc_find_library (SNES petscsnes)
petsc_find_library (TS petscts)
macro (PETSC_JOIN libs deps)
list (APPEND PETSC_LIBRARIES_${libs} ${PETSC_LIBRARIES_${deps}})
endmacro (PETSC_JOIN libs deps)
petsc_join (VEC SYS)
petsc_join (MAT VEC)
petsc_join (DM MAT)
petsc_join (KSP DM)
petsc_join (SNES KSP)
petsc_join (TS SNES)
petsc_join (ALL TS)
else ()
set (PETSC_LIBRARY_VEC "NOTFOUND" CACHE INTERNAL "Cleared" FORCE) # There is no libpetscvec
petsc_find_library (SINGLE petsc)
foreach (pkg SYS VEC MAT DM KSP SNES TS ALL)
set (PETSC_LIBRARIES_${pkg} "${PETSC_LIBRARY_SINGLE}")
endforeach ()
endif ()
if (PETSC_LIBRARY_TS)
message (STATUS "Recognized PETSc install with separate libraries for each package")
else ()
message (STATUS "Recognized PETSc install with single library for all packages")
endif ()
include(Check${PETSC_LANGUAGE_BINDINGS}SourceRuns)
macro (PETSC_TEST_RUNS includes libraries runs)
if(${PETSC_LANGUAGE_BINDINGS} STREQUAL "C")
set(_PETSC_ERR_FUNC "CHKERRQ(ierr)")
elseif(${PETSC_LANGUAGE_BINDINGS} STREQUAL "CXX")
set(_PETSC_ERR_FUNC "CHKERRXX(ierr)")
endif()
if (PETSC_VERSION VERSION_GREATER 3.1)
set (_PETSC_TSDestroy "TSDestroy(&ts)")
else ()
set (_PETSC_TSDestroy "TSDestroy(ts)")
endif ()
set(_PETSC_TEST_SOURCE "
static const char help[] = \"PETSc test program.\";
#include <petscts.h>
int main(int argc,char *argv[]) {
PetscErrorCode ierr;
TS ts;
ierr = PetscInitialize(&argc,&argv,0,help);${_PETSC_ERR_FUNC};
ierr = TSCreate(PETSC_COMM_WORLD,&ts);${_PETSC_ERR_FUNC};
ierr = TSSetFromOptions(ts);${_PETSC_ERR_FUNC};
ierr = ${_PETSC_TSDestroy};${_PETSC_ERR_FUNC};
ierr = PetscFinalize();${_PETSC_ERR_FUNC};
return 0;
}
")
multipass_source_runs ("${includes}" "${libraries}" "${_PETSC_TEST_SOURCE}" ${runs} "${PETSC_LANGUAGE_BINDINGS}")
if (${${runs}})
set (PETSC_EXECUTABLE_RUNS "YES" CACHE BOOL
"Can the system successfully run a PETSc executable? This variable can be manually set to \"YES\" to force CMake to accept a given PETSc configuration, but this will almost always result in a broken build. If you change PETSC_DIR, PETSC_ARCH, or PETSC_CURRENT you would have to reset this variable." FORCE)
endif (${${runs}})
endmacro (PETSC_TEST_RUNS)
find_path (PETSC_INCLUDE_DIR petscts.h HINTS "${PETSC_DIR}" PATH_SUFFIXES include NO_DEFAULT_PATH)
find_path (PETSC_INCLUDE_CONF petscconf.h HINTS "${PETSC_DIR}" PATH_SUFFIXES "${PETSC_ARCH}/include" "bmake/${PETSC_ARCH}" NO_DEFAULT_PATH)
mark_as_advanced (PETSC_INCLUDE_DIR PETSC_INCLUDE_CONF)
set (petsc_includes_minimal ${PETSC_INCLUDE_CONF} ${PETSC_INCLUDE_DIR})
petsc_test_runs ("${petsc_includes_minimal}" "${PETSC_LIBRARIES_TS}" petsc_works_minimal)
if (petsc_works_minimal)
message (STATUS "Minimal PETSc includes and libraries work. This probably means we are building with shared libs.")
set (petsc_includes_needed "${petsc_includes_minimal}")
else (petsc_works_minimal) # Minimal includes fail, see if just adding full includes fixes it
petsc_test_runs ("${petsc_includes_all}" "${PETSC_LIBRARIES_TS}" petsc_works_allincludes)
if (petsc_works_allincludes) # It does, we just need all the includes (
message (STATUS "PETSc requires extra include paths, but links correctly with only interface libraries. This is an unexpected configuration (but it seems to work fine).")
set (petsc_includes_needed ${petsc_includes_all})
else (petsc_works_allincludes) # We are going to need to link the external libs explicitly
resolve_libraries (petsc_libraries_external "${petsc_libs_external}")
foreach (pkg SYS VEC MAT DM KSP SNES TS ALL)
list (APPEND PETSC_LIBRARIES_${pkg} ${petsc_libraries_external})
endforeach (pkg)
petsc_test_runs ("${petsc_includes_minimal}" "${PETSC_LIBRARIES_TS}" petsc_works_alllibraries)
if (petsc_works_alllibraries)
message (STATUS "PETSc only need minimal includes, but requires explicit linking to all dependencies. This is expected when PETSc is built with static libraries.")
set (petsc_includes_needed ${petsc_includes_minimal})
else (petsc_works_alllibraries)
# It looks like we really need everything, should have listened to Matt
set (petsc_includes_needed ${petsc_includes_all})
petsc_test_runs ("${petsc_includes_all}" "${PETSC_LIBRARIES_TS}" petsc_works_all)
if (petsc_works_all) # We fail anyways
message (STATUS "PETSc requires extra include paths and explicit linking to all dependencies. This probably means you have static libraries and something unexpected in PETSc headers.")
else (petsc_works_all) # We fail anyways
message (STATUS "PETSc could not be used, maybe the install is broken.")
endif (petsc_works_all)
endif (petsc_works_alllibraries)
endif (petsc_works_allincludes)
endif (petsc_works_minimal)
# We do an out-of-source build so __FILE__ will be an absolute path, hence __INSDIR__ is superfluous
if (${PETSC_VERSION} VERSION_LESS 3.1)
set (PETSC_DEFINITIONS "-D__SDIR__=\"\"" CACHE STRING "PETSc definitions" FORCE)
else ()
set (PETSC_DEFINITIONS "-D__INSDIR__=" CACHE STRING "PETSc definitions" FORCE)
endif ()
# Sometimes this can be used to assist FindMPI.cmake
set (PETSC_MPIEXEC ${petsc_mpiexec} CACHE FILEPATH "Executable for running PETSc MPI programs" FORCE)
set (PETSC_INCLUDES ${petsc_includes_needed} CACHE STRING "PETSc include path" FORCE)
set (PETSC_LIBRARIES ${PETSC_LIBRARIES_ALL} CACHE STRING "PETSc libraries" FORCE)
set (PETSC_COMPILER ${petsc_cc} CACHE FILEPATH "PETSc compiler" FORCE)
# Note that we have forced values for all these choices. If you
# change these, you are telling the system to trust you that they
# work. It is likely that you will end up with a broken build.
mark_as_advanced (PETSC_INCLUDES PETSC_LIBRARIES PETSC_COMPILER PETSC_DEFINITIONS PETSC_MPIEXEC PETSC_EXECUTABLE_RUNS)
endif ()
include (FindPackageHandleStandardArgs)
find_package_handle_standard_args (PETSc
"PETSc could not be found. Be sure to set PETSC_DIR and PETSC_ARCH."
PETSC_INCLUDES PETSC_LIBRARIES PETSC_EXECUTABLE_RUNS)
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