Merge remote-tracking branch 'martyn/omp-double-linking'

buildconfig/CMake/FindGSL.cmake

-# Script found on KDE-edu list
-# TODO replace this with OpenCog SIAI copyrighted version.
-# 
-# Look for the header file
-# Try to find gnu scientific library GSL
-# See 
-# http://www.gnu.org/software/gsl/  and 
-# http://gnuwin32.sourceforge.net/packages/gsl.htm
-#
-# Once run this will define: 
-# 
-# GSL_FOUND       = system has GSL lib
-#
-# GSL_LIBRARIES   = full path to the libraries
-#    on Unix/Linux with additional linker flags from "gsl-config --libs"
-# 
-# CMAKE_GSL_CXX_FLAGS  = Unix compiler flags for GSL, essentially "`gsl-config --cxxflags`"
-#
-# GSL_INCLUDE_DIR      = where to find headers 
-#
-# GSL_LINK_DIRECTORIES = link directories, useful for rpath on Unix
-# GSL_EXE_LINKER_FLAGS = rpath on Unix
-#
-# Felix Woelk 07/2004
-# Jan Woetzel
-#
-# www.mip.informatik.uni-kiel.de
-# --------------------------------
-
-IF( WIN32 OR APPLE )  # We get things out of Third_Party on the Mac
-  # JW tested with gsl-1.8, Windows XP, MSVS 7.1
-  SET(GSL_POSSIBLE_ROOT_DIRS
-    ${GSL_ROOT_DIR}
-    $ENV{GSL_ROOT_DIR}
-    ${GSL_DIR}
-    ${GSL_HOME}    
-    $ENV{GSL_DIR}
-    $ENV{GSL_HOME}
-    $ENV{EXTRA}
-    )
-  FIND_PATH(GSL_INCLUDE_DIR
-    NAMES gsl/gsl_cdf.h gsl/gsl_randist.h
-    PATHS ${GSL_POSSIBLE_ROOT_DIRS}
-    PATH_SUFFIXES include
-    DOC "GSL header include dir"
-    )
-  
-  FIND_LIBRARY(GSL_GSL_LIBRARY
-    NAMES gsl libgsl
-    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
-    PATH_SUFFIXES lib
-    DOC "GSL library dir" )  
-  
-  FIND_LIBRARY(GSL_GSL_LIBRARY_DEBUG
-    NAMES gsl_d libgsl_d
-    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
-    PATH_SUFFIXES lib
-    DOC "GSL library dir" )  
-  
-  FIND_LIBRARY(GSL_GSLCBLAS_LIBRARY
-    NAMES gslcblas libgslcblas cblas
-    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
-    PATH_SUFFIXES lib
-    DOC "GSL cblas library dir" )
-  
-  FIND_LIBRARY(GSL_GSLCBLAS_LIBRARY_DEBUG
-    NAMES gslcblas_d libgslcblas_d cblas_d
-    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
-    PATH_SUFFIXES lib
-    DOC "GSL cblas library dir" )
-  
-  IF ( GSL_GSL_LIBRARY_DEBUG AND GSL_GSLCBLAS_LIBRARY_DEBUG )
-    SET(GSL_LIBRARIES optimized ${GSL_GSL_LIBRARY} optimized ${GSL_GSLCBLAS_LIBRARY} debug ${GSL_GSL_LIBRARY_DEBUG} debug ${GSL_GSLCBLAS_LIBRARY_DEBUG})
-  ELSE()
-    SET(GSL_LIBRARIES ${GSL_GSL_LIBRARY} ${GSL_GSLCBLAS_LIBRARY} )
-  ENDIF()
-
-  mark_as_advanced ( GSL_INCLUDE_DIR GSL_GSL_LIBRARY GSL_GSL_LIBRARY_DEBUG
-                     GSL_GSLCBLAS_LIBRARY GSL_GSLCBLAS_LIBRARY_DEBUG
-  )
-
-ELSE()
-  
-  IF(UNIX) 
-    SET(GSL_CONFIG_PREFER_PATH 
-      "$ENV{GSL_DIR}/bin"
-      "$ENV{GSL_DIR}"
-      "$ENV{GSL_HOME}/bin" 
-      "$ENV{GSL_HOME}" 
-      CACHE STRING "preferred path to GSL (gsl-config)")
-    FIND_PROGRAM(GSL_CONFIG gsl-config
-      ${GSL_CONFIG_PREFER_PATH}
-      /usr/bin/
-      )
-    # MESSAGE("DBG GSL_CONFIG ${GSL_CONFIG}")
-    
-    IF (GSL_CONFIG) 
-      # set CXXFLAGS to be fed into CXX_FLAGS by the user:
-      SET(GSL_CXX_FLAGS "`${GSL_CONFIG} --cflags`")
-      
-      # set INCLUDE_DIRS to prefix+include
-      EXEC_PROGRAM(${GSL_CONFIG}
-        ARGS --prefix
-        OUTPUT_VARIABLE GSL_PREFIX)
-      SET(GSL_INCLUDE_DIR ${GSL_PREFIX}/include CACHE STRING INTERNAL)
-
-      # set link libraries and link flags
-      
-      # extract link dirs for rpath  
-      EXEC_PROGRAM(${GSL_CONFIG}
-        ARGS --libs
-        OUTPUT_VARIABLE GSL_CONFIG_LIBS )
-
-      SET( GSL_LIBRARIES ${GSL_CONFIG_LIBS} )
-
-      # split off the link dirs (for rpath)
-      # use regular expression to match wildcard equivalent "-L*<endchar>"
-      # with <endchar> is a space or a semicolon
-      STRING(REGEX MATCHALL "[-][L]([^ ;])+" 
-        GSL_LINK_DIRECTORIES_WITH_PREFIX 
-        "${GSL_CONFIG_LIBS}" )
-      #      MESSAGE("DBG  GSL_LINK_DIRECTORIES_WITH_PREFIX=${GSL_LINK_DIRECTORIES_WITH_PREFIX}")
-
-      # remove prefix -L because we need the pure directory for LINK_DIRECTORIES
-      
-      IF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
-        STRING(REGEX REPLACE "[-][L]" "" GSL_LINK_DIRECTORIES ${GSL_LINK_DIRECTORIES_WITH_PREFIX} )
-      ENDIF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
-      SET(GSL_EXE_LINKER_FLAGS "-Wl,-rpath,${GSL_LINK_DIRECTORIES}" CACHE STRING INTERNAL)
-      #      MESSAGE("DBG  GSL_LINK_DIRECTORIES=${GSL_LINK_DIRECTORIES}")
-      #      MESSAGE("DBG  GSL_EXE_LINKER_FLAGS=${GSL_EXE_LINKER_FLAGS}")
-
-      #      ADD_DEFINITIONS("-DHAVE_GSL")
-      #      SET(GSL_DEFINITIONS "-DHAVE_GSL")
-      MARK_AS_ADVANCED(
-        GSL_CXX_FLAGS
-        GSL_INCLUDE_DIR
-        GSL_LIBRARIES
-        GSL_LINK_DIRECTORIES
-        GSL_DEFINITIONS
-      )
-      #MESSAGE(STATUS "Using GSL from ${GSL_PREFIX}")
-      include ( FindPackageHandleStandardArgs )
-      find_package_handle_standard_args( GSL DEFAULT_MSG GSL_INCLUDE_DIR )
-      
-    ELSE(GSL_CONFIG)
-      MESSAGE("FindGSL.cmake: gsl-config not found. Please set it manually. GSL_CONFIG=${GSL_CONFIG}")
-    ENDIF(GSL_CONFIG)
-
-    mark_as_advanced ( GSL_CONFIG GSL_CONFIG_PREFER_PATH GSL_EXE_LINKER_FLAGS )
-
-  ENDIF(UNIX)
-ENDIF()
-
-
-IF(GSL_LIBRARIES)
-  IF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
-    SET(GSL_FOUND 1)
-  ENDIF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
-ENDIF(GSL_LIBRARIES)
-