Add CMake project

cmake/FindOFI.cmake

@@ -0,0 +1,89 @@
+################################################################################
+#    Copyright (C) 2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    #
+#                                                                              #
+#              This software is distributed under the terms of the             #
+#              GNU Lesser General Public Licence (LGPL) version 3,             #
+#                  copied verbatim in the file "LICENSE"                       #
+################################################################################
+
+# According to the docs the modification of the PKG_CONFIG_PATH environment should
+# not be necessary, but it does not work otherwise.
+if(OFI_ROOT)
+  list(APPEND CMAKE_PREFIX_PATH "${OFI_ROOT}/lib/pkgconfig")
+  set(ENV{PKG_CONFIG_PATH} "${OFI_ROOT}/lib/pkgconfig:" $ENV{PKG_CONFIG_PATH})
+endif()
+
+if(ENV{OFI_ROOT})
+  list(APPEND CMAKE_PREFIX_PATH "$ENV{OFI_ROOT}/lib/pkgconfig")
+  set(ENV{PKG_CONFIG_PATH} "$ENV{OFI_ROOT}/lib/pkgconfig:" $ENV{PKG_CONFIG_PATH})
+endif()
+
+# This should be the default as of CMake 3.1, but it is not set. BUG? Also, it does not work
+set(PKG_CONFIG_USE_CMAKE_PREFIX_PATH 1)
+find_package(PkgConfig)
+
+if(PKG_CONFIG_FOUND)
+  # Find include dir and dependencies from pkgconfig
+  pkg_check_modules(_OFI libfabric QUIET)
+
+  # Retrieve version from pkgconfig
+  execute_process(
+    COMMAND ${PKG_CONFIG_EXECUTABLE} libfabric --modversion
+    OUTPUT_VARIABLE OFI_VERSION
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+
+  # The IMPORTED_TARGET option of the pkg_check_modules() function is useless,
+  # so let's build it ourselves
+  find_library(OFI_LIBFABRIC
+    NAMES libfabric.so libfabric.dylib
+    HINTS ${OFI_ROOT} $ENV{OFI_ROOT}
+    PATH_SUFFIXES lib
+  )
+
+  # Just take the include dirs found by the PkgConfig module
+  set(OFI_INCLUDE_DIRS ${_OFI_INCLUDE_DIRS})
+
+  # Find fi_info command to be able to check required features of the OFI installation
+  find_program(OFI_INFO_EXECUTABLE
+    NAMES fi_info
+    HINTS ${OFI_ROOT} $ENV{OFI_ROOT}
+    PATH_SUFFIXES bin
+  )
+
+  # Detect ofi providers, they can be required via the COMPONENTS argument of find_package
+  if(OFI_INFO_EXECUTABLE)
+    execute_process(
+      COMMAND ${OFI_INFO_EXECUTABLE} -l
+      OUTPUT_VARIABLE output
+    )
+    string(REPLACE "\n" ";" lines ${output})
+    foreach(line IN LISTS lines)
+      string(REGEX
+        MATCH "^([a-zA-Z0-9_]+):"
+        found "${line}"
+      )
+      if(found)
+        string(TOLOWER "${CMAKE_MATCH_1}" provider)
+        set(OFI_fi_${provider}_FOUND TRUE)
+      endif()
+    endforeach()
+  endif()
+
+  # Check search result, check version constraints and print status
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(OFI
+    REQUIRED_VARS OFI_LIBFABRIC OFI_INCLUDE_DIRS OFI_INFO_EXECUTABLE
+    VERSION_VAR OFI_VERSION
+    HANDLE_COMPONENTS
+  )
+endif()
+
+if(OFI_FOUND)
+  # Define an imported target
+  add_library(OFI::libfabric SHARED IMPORTED GLOBAL)
+  set_target_properties(OFI::libfabric PROPERTIES
+    IMPORTED_LOCATION ${OFI_LIBFABRIC}
+    INTERFACE_INCLUDE_DIRECTORIES ${OFI_INCLUDE_DIRS}
+  )
+endif()