another Hwloc script

Former-commit-id: cc5efdeb85 [formerly 295c0c994e]
Former-commit-id: fcaf78b967

resources/cmake/find_modules/FindHwloc.cmake

@@ -1,179 +1,55 @@
-# FindHwloc
-# ----------
+# Try to find hwloc libraries and headers.
 #
-# Try to find Portable Hardware Locality (hwloc) libraries.
-# http://www.open-mpi.org/software/hwloc
+# Usage of this module:
 #
-# You may declare HWLOC_ROOT environment variable to tell where
-# your hwloc library is installed. 
+#  find_package(hwloc)
 #
-# Once done this will define::
+# Variables defined by this module:
 #
-#   Hwloc_FOUND            - True if hwloc was found
-#   Hwloc_INCLUDE_DIRS     - include directories for hwloc
-#   Hwloc_LIBRARIES        - link against these libraries to use hwloc
-#   Hwloc_VERSION          - version
-#   Hwloc_CFLAGS           - include directories as compiler flags
-#   Hwloc_LDLFAGS          - link paths and libs as compiler flags
-#
-
-#=============================================================================
-# Copyright 2014 Mikael Lepistö
-#
-# Distributed under the OSI-approved BSD License (the "License");
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-
-if(WIN32)
-  find_path(Hwloc_INCLUDE_DIR
-    NAMES
-      hwloc.h
-    PATHS
-      ENV "PROGRAMFILES(X86)"
-      ENV HWLOC_ROOT
-    PATH_SUFFIXES
-      include
-  )
-
-  find_library(Hwloc_LIBRARY
-    NAMES 
-      libhwloc.lib
-    PATHS
-      ENV "PROGRAMFILES(X86)"
-      ENV HWLOC_ROOT
-    PATH_SUFFIXES
-      lib
-  )
-
-  #
-  # Check if the found library can be used to linking 
-  #
-  SET (_TEST_SOURCE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/linktest.c")
-  FILE (WRITE "${_TEST_SOURCE}"
-    "
-    #include <hwloc.h>
-    int main()
-    { 
-      hwloc_topology_t topology;
-      int nbcores;
-      hwloc_topology_init(&topology);
-      hwloc_topology_load(topology);
-      nbcores = hwloc_get_nbobjs_by_type(topology, HWLOC_OBJ_CORE);
-      hwloc_topology_destroy(topology);
-      return 0;
-    }
-    "
-  )
-
-  TRY_COMPILE(_LINK_SUCCESS ${CMAKE_BINARY_DIR} "${_TEST_SOURCE}"
-    CMAKE_FLAGS
-    "-DINCLUDE_DIRECTORIES:STRING=${Hwloc_INCLUDE_DIR}"
-    CMAKE_FLAGS
-    "-DLINK_LIBRARIES:STRING=${Hwloc_LIBRARY}"
-  )
-
-  IF(NOT _LINK_SUCCESS)
-    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
-      message(STATUS "You are building 64bit target.")
-    ELSE()
-      message(STATUS "You are building 32bit code. If you like to build x64 use e.g. -G 'Visual Studio 12 Win64' generator." )
-    ENDIF()
-    message(FATAL_ERROR "Library found, but linking test program failed.")
-  ENDIF()
-
-  #
-  # Resolve version if some compiled binary found...
-  #
-  find_program(HWLOC_INFO_EXECUTABLE
-    NAMES 
-      hwloc-info
-    PATHS
-      ENV HWLOC_ROOT 
-    PATH_SUFFIXES
-      bin
-  )
-  
-  if(HWLOC_INFO_EXECUTABLE)
-    execute_process(
-      COMMAND ${HWLOC_INFO_EXECUTABLE} "--version" 
-      OUTPUT_VARIABLE HWLOC_VERSION_LINE 
-      OUTPUT_STRIP_TRAILING_WHITESPACE
-    )
-    string(REGEX MATCH "([0-9]+.[0-9]+)$" 
-      Hwloc_VERSION "${HWLOC_VERSION_LINE}")
-    unset(HWLOC_VERSION_LINE)
-  endif()
-  
-  #
-  # All good
-  #
-
-  set(Hwloc_LIBRARIES ${Hwloc_LIBRARY})
-  set(Hwloc_INCLUDE_DIRS ${Hwloc_INCLUDE_DIR})
-
-  include(FindPackageHandleStandardArgs)
-  find_package_handle_standard_args(
-    Hwloc
-    FOUND_VAR Hwloc_FOUND
-    REQUIRED_VARS Hwloc_LIBRARY Hwloc_INCLUDE_DIR
-    VERSION_VAR Hwloc_VERSION)
-
-  mark_as_advanced(
-    Hwloc_INCLUDE_DIR
-    Hwloc_LIBRARY)
-
-  foreach(arg ${Hwloc_INCLUDE_DIRS})
-    set(Hwloc_CFLAGS "${Hwloc_CFLAGS} /I${arg}")
-  endforeach()
+#  HWLOC_FOUND              System has hwloc libraries and headers
+#  HWLOC_LIBRARIES          The hwloc library
+#  HWLOC_INCLUDE_DIRS       The location of HWLOC headers
 
-  set(Hwloc_LDFLAGS "${Hwloc_LIBRARY}")
+find_path(
+  HWLOC_PREFIX
+  NAMES include/hwloc.h
+)
 
-else()
+if (NOT HWLOC_PREFIX AND NOT $ENV{HWLOC_BASE} STREQUAL "")
+  set(HWLOC_PREFIX $ENV{HWLOC_BASE})
+endif()
 
-  # Find with pkgconfig
-  find_package(PkgConfig)
+message(STATUS "Searching for hwloc library in path " ${HWLOC_PREFIX})
 
-  if(HWLOC_ROOT)
-    set(ENV{PKG_CONFIG_PATH} "${HWLOC_ROOT}/lib/pkgconfig")
-  else()
-    foreach(PREFIX ${CMAKE_PREFIX_PATH})
-      set(PKG_CONFIG_PATH "${PKG_CONFIG_PATH}:${PREFIX}/lib/pkgconfig")
-    endforeach()
-    set(ENV{PKG_CONFIG_PATH} "${PKG_CONFIG_PATH}:$ENV{PKG_CONFIG_PATH}")
-  endif()
+find_library(
+  HWLOC_LIBRARIES
+  NAMES hwloc
+  HINTS ${HWLOC_PREFIX}/lib
+)
 
-  if(hwloc_FIND_REQUIRED)
-    set(_hwloc_OPTS "REQUIRED")
-  elseif(hwloc_FIND_QUIETLY)
-    set(_hwloc_OPTS "QUIET")
-  else()
-    set(_hwloc_output 1)
-  endif()
+find_path(
+  HWLOC_INCLUDE_DIRS
+  NAMES hwloc.h
+  HINTS ${HWLOC_PREFIX}/include
+)
 
-  if(hwloc_FIND_VERSION)
-    if(hwloc_FIND_VERSION_EXACT)
-      pkg_check_modules(Hwloc ${_hwloc_OPTS} hwloc=${hwloc_FIND_VERSION})
-    else()
-      pkg_check_modules(Hwloc ${_hwloc_OPTS} hwloc>=${hwloc_FIND_VERSION})
-    endif()
-  else()
-    pkg_check_modules(Hwloc ${_hwloc_OPTS} hwloc)
-  endif()
+include(FindPackageHandleStandardArgs)
 
-  if(Hwloc_FOUND)
-    include(FindPackageHandleStandardArgs)
-    find_package_handle_standard_args(Hwloc DEFAULT_MSG Hwloc_LIBRARIES)
+find_package_handle_standard_args(
+  HWLOC DEFAULT_MSG
+  HWLOC_LIBRARIES
+  HWLOC_INCLUDE_DIRS
+)
 
-    if(NOT ${Hwloc_VERSION} VERSION_LESS 1.7.0)
-      set(Hwloc_GL_FOUND 1)
-    endif()
+mark_as_advanced(
+  HWLOC_LIBRARIES
+  HWLOC_INCLUDE_DIRS
+)
 
-    if(_hwloc_output)
-      message(STATUS
-        "Found hwloc ${Hwloc_VERSION} in ${Hwloc_INCLUDE_DIRS}:${Hwloc_LIBRARIES}")
-    endif()
+if (HWLOC_FOUND)
+  if (NOT $ENV{HWLOC_LIB} STREQUAL "")
+# set(HWLOC_LIBRARIES "$ENV{HWLOC_LIB}")
   endif()
-endif()
+  message(STATUS "hwloc includes:  " ${HWLOC_INCLUDE_DIRS})
+  message(STATUS "hwloc libraries: " ${HWLOC_LIBRARIES})
+endif()