From c8580cd01c5276d96526f505444815944436c01b Mon Sep 17 00:00:00 2001
From: Markus Blatt <markus@dr-blatt.de>
Date: Tue, 24 Feb 2015 19:02:30 +0100
Subject: [PATCH] Adds a find module for PT-Scotch.
This is e.g. needed for dune-alugrid and might be a first step for
getting rid off the ParMETIS dependency.
---
cmake/modules/AddPTScotchFlags.cmake | 25 +++++++++
cmake/modules/CMakeLists.txt | 2 +
cmake/modules/FindPTScotch.cmake | 83 ++++++++++++++++++++++++++++
cmake/modules/Makefile.am | 2 +
config.h.cmake | 3 +
5 files changed, 115 insertions(+)
create mode 100644 cmake/modules/AddPTScotchFlags.cmake
create mode 100644 cmake/modules/FindPTScotch.cmake
diff --git a/cmake/modules/AddPTScotchFlags.cmake b/cmake/modules/AddPTScotchFlags.cmake
new file mode 100644
index 000000000..57376bc00
--- /dev/null
+++ b/cmake/modules/AddPTScotchFlags.cmake
@@ -0,0 +1,25 @@
+# Module providing convenience functions for using PT-Scotch
+#
+# Provides the following functions:
+#
+# add_dune_parmetis_flags(target1 target2 ...)
+#
+# Adds the necessary flags to compile and link the targets with PT-Scotch support.
+#
+function(add_dune_ptscotch_flags _targets)
+ if(PTSCOTCH_FOUND)
+ foreach(_target ${_targets})
+ message("pt-scotch target_link_libraries(${_target} ${PTSCOTCH_LIBRARY} ${PTSCOTCHERR_LIBRARY}")
+ target_link_libraries(${_target} ${PTSCOTCH_LIBRARY} ${PTSCOTCHERR_LIBRARY})
+ GET_TARGET_PROPERTY(_props ${_target} INCLUDE_DIRECTORIES)
+ string(REPLACE "_props-NOTFOUND" "" _props "${_props}")
+ SET_TARGET_PROPERTIES(${_target} PROPERTIES INCLUDE_DIRECTORIES
+ "${_props};${PTSCOTCH_INCLUDE_DIRS}")
+ GET_TARGET_PROPERTY(_props ${_target} COMPILE_DEFINITIONS)
+ string(REPLACE "_props-NOTFOUND" "" _props "${_props}")
+ SET_TARGET_PROPERTIES(${_target} PROPERTIES COMPILE_DEFINITIONS
+ "${_props};")
+ endforeach(_target ${_targets})
+ add_dune_mpi_flags(${_targets})
+ endif(PTSCOTCH_FOUND)
+endfunction(add_dune_ptscotch_flags)
diff --git a/cmake/modules/CMakeLists.txt b/cmake/modules/CMakeLists.txt
index 4d29804b2..f788ed2ee 100644
--- a/cmake/modules/CMakeLists.txt
+++ b/cmake/modules/CMakeLists.txt
@@ -2,6 +2,7 @@ set(modules
AddGMPFlags.cmake
AddMETISFlags.cmake
AddParMETISFlags.cmake
+ AddPTScotchFlags.cmake
AddUMFPackFlags.cmake
CheckCXX11Features.cmake
DuneBoost.cmake
@@ -22,6 +23,7 @@ set(modules
FindMETIS.cmake
FindMProtect.cmake
FindParMETIS.cmake
+ FindPTScotch.cmake
FindUMFPack.cmake
Headercheck.cmake
LanguageSupport.cmake
diff --git a/cmake/modules/FindPTScotch.cmake b/cmake/modules/FindPTScotch.cmake
new file mode 100644
index 000000000..2aa9895c6
--- /dev/null
+++ b/cmake/modules/FindPTScotch.cmake
@@ -0,0 +1,83 @@
+# Module that checks whether PT-Scotch is available.
+#
+# Accepts the following variables:
+#
+# PTSCOTCH_ROOT: Prefix where PT-Scotch is installed.
+# PTSCOTCH_SUFFIX: Scotch might be compiled using different
+# integer sizes (int32, int32, long). When
+# this is is set the headers and libaries
+# are search under the suffix
+# include/scotch-${PTSCOTCH_SUFFIX, and
+# lib/scotch-${PTSCOTCH_SUFFIX}, respectively.
+# Sets the following variables:
+# PTSCOTCH_INCLUDE_DIRS: All include directories needed to compile PT-Scotch programs.
+# PTSCOTCH_LIBRARIES: Alle libraries needed to link PT-Scotch programs.
+# PTSCOTCH_FOUND: True if PT-Scotch was found.
+#
+# Provides the following macros:
+#
+# find_package(PTScotch)
+
+include(DuneMPI)
+macro(_search_pt_lib libvar libname doc)
+ find_library(${libvar} ${libname}
+ PATHS${PTSCOTCH_ROOT} PATH_SUFFIXES ${PATH_SUFFIXES}
+ NO_DEFAULT_PATH
+ DOC "${doc}")
+ find_library(${libvar} ${libname})
+endmacro(_search_pt_lib)
+
+if(PTSCOTCH_SUFFIX)
+ set(PATH_SUFFIXES "scotch-${PTSCOTCH_SUFFIX}")
+else(PTSCOTCH_SUFFIX)
+ set(PATH_SUFFIXES "scotch")
+endif(PTSCOTCH_SUFFIX)
+
+include(CMakePushCheckState)
+cmake_push_check_state() # Save variables
+set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${MPI_DUNE_INCLUDE_PATH})
+set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${MPI_DUNE_COMPILE_FLAGS}")
+
+find_path(PTSCOTCH_INCLUDE_DIR ptscotch.h
+ PATHS ${PTSCOTCH_ROOT}
+ PATH_SUFFIXES ${PATH_SUFFIXES}
+ NO_DEFAULT_PATH
+ DOC "Include directory of PT-Scotch")
+find_path(PTSCOTCH_INCLUDE_DIR ptscotch.h
+ PATH_SUFFIXES ${PATH_SUFFIXES})
+
+_search_pt_lib(PTSCOTCH_LIBRARY ptscotch "The main PT-Scotch library.")
+_search_pt_lib(PTSCOTCHERR_LIBRARY ptscotcherr "The PT-Scotch error library.")
+
+# behave like a CMake module is supposed to behave
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(
+ "PTScotch"
+ DEFAULT_MSG
+ PTSCOTCH_INCLUDE_DIR
+ PTSCOTCH_LIBRARY
+ PTSCOTCHERR_LIBRARY
+)
+#restore old values
+cmake_pop_check_state()
+
+if(PTSCOTCH_FOUND)
+ set(PTSCOTCH_INCLUDE_DIRS ${PTSCOTCH_INCLUDE_DIR})
+ set(PTSCOTCH_LIBRARIES ${PTSCOTCH_LIBRARY} ${PTSCOTCHERR_LIBRARY} ${MPI_DUNE_LIBRARIES}
+ CACHE FILEPATH "All libraries needed to link programs using PT-Scotch")
+ set(PTSCOCH_LINK_FLAGS "${DUNE_MPI_LINK_FLAGS}"
+ CACHE STRING "PT-Scotch link flags")
+ set(HAVE_PTSCOTCH 1)
+ # log result
+ file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+ "Determing location of PT-Scotch succeded:\n"
+ "Include directory: ${PTSCOTCH_INCLUDE_DIRS}\n"
+ "Library directory: ${PTSCOTCH_LIBRARIES}\n\n")
+
+ foreach(dir ${PTSCOCTH_INCLUDE_DIRS})
+ set_property(GLOBAL APPEND PROPERTY ALL_PKG_FLAGS "-I${dir}")
+ endforeach()
+ set_property(GLOBAL APPEND PROPERTY ALL_PKG_LIBS "${PTSCOTCH_LIBRARIES}")
+endif(PTSCOTCH_FOUND)
+
+mark_as_advanced(PTSCOTCH_INCLUDE_DIR PTSCOTCH_LIBRARIES HAVE_PTSCOTCH)
diff --git a/cmake/modules/Makefile.am b/cmake/modules/Makefile.am
index a78a1271e..1b7de34e1 100644
--- a/cmake/modules/Makefile.am
+++ b/cmake/modules/Makefile.am
@@ -2,6 +2,7 @@ MODULES = \
AddGMPFlags.cmake \
AddMETISFlags.cmake \
AddParMETISFlags.cmake \
+ AddPTScotchFlags.cmake \
AddUMFPackFlags.cmake \
CheckCXX11Features.cmake \
DuneBoost.cmake \
@@ -22,6 +23,7 @@ MODULES = \
FindMETIS.cmake \
FindMProtect.cmake \
FindParMETIS.cmake \
+ FindPTScotch.cmake \
FindUMFPack.cmake \
Headercheck.cmake \
LanguageSupport.cmake \
diff --git a/config.h.cmake b/config.h.cmake
index 6e2874935..df66f2466 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -124,6 +124,9 @@
by configure _and_ if the application uses the PARMETIS_CPPFLAGS */
#cmakedefine HAVE_PARMETIS ENABLE_PARMETIS
+/* Define to 1 if PT-Scotch is available */
+#cmakedefine HAVE_PTSCOTCH 1
+
/* Include always useful headers */
#include "FC.h"
#define FC_FUNC FC_GLOBAL_
--
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