cmake/Findgsl.cmake

   1 # Try to find gnu scientific library GSL
   2 # See
   3 # http://www.gnu.org/software/gsl/  and
   4 # http://gnuwin32.sourceforge.net/packages/gsl.htm
   5 #
   6 # Once run this will define:
   7 #
   8 # GSL_FOUND       = system has GSL lib
   9 #
  10 # GSL_LIBRARIES   = full path to the libraries
  11 #    on Unix/Linux with additional linker flags from "gsl-config --libs"
  12 #
  13 # CMAKE_GSL_CXX_FLAGS  = Unix compiler flags for GSL, essentially "`gsl-config --cxxflags`"
  14 #
  15 # GSL_INCLUDE_DIR      = where to find headers
  16 #
  17 # GSL_LINK_DIRECTORIES = link directories, useful for rpath on Unix
  18 # GSL_EXE_LINKER_FLAGS = rpath on Unix
  19 #
  20 # Felix Woelk 07/2004
  21 # Jan Woetzel
  22 #
  23 # www.mip.informatik.uni-kiel.de
  24 # --------------------------------
  25
  26 IF(WIN32)
  27   # JW tested with gsl-1.8, Windows XP, MSVS 7.1, MSVS 8.0
  28   SET(GSL_POSSIBLE_ROOT_DIRS
  29     ${GSL_ROOT_DIR}
  30     $ENV{GSL_ROOT_DIR}
  31     ${GSL_DIR}
  32     ${GSL_HOME}
  33     $ENV{GSL_DIR}
  34     $ENV{GSL_HOME}
  35     $ENV{EXTERN_LIBS_DIR}/gsl
  36     $ENV{EXTRA}
  37     )
  38   FIND_PATH(GSL_INCLUDE_DIR
  39     NAMES gsl/gsl_cdf.h gsl/gsl_randist.h
  40     PATHS ${GSL_POSSIBLE_ROOT_DIRS}
  41     PATH_SUFFIXES include
  42     DOC "GSL header include dir"
  43     )
  44
  45   FIND_LIBRARY(GSL_GSL_LIBRARY
  46     NAMES gsl libgsl
  47     PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
  48     PATH_SUFFIXES lib
  49     DOC "GSL library dir" )
  50
  51   FIND_LIBRARY(GSL_GSLCBLAS_LIBRARY
  52     NAMES gslcblas libgslcblas
  53     PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
  54     PATH_SUFFIXES lib
  55     DOC "GSL cblas library dir" )
  56
  57   SET(GSL_LIBRARIES ${GSL_GSL_LIBRARY})
  58
  59   #MESSAGE("DBG\n"
  60     #  "GSL_GSL_LIBRARY=${GSL_GSL_LIBRARY}\n"
  61     #  "GSL_GSLCBLAS_LIBRARY=${GSL_GSLCBLAS_LIBRARY}\n"
  62     #  "GSL_LIBRARIES=${GSL_LIBRARIES}")
  63
  64
  65 ELSE(WIN32)
  66
  67   IF(UNIX)
  68     SET(GSL_CONFIG_PREFER_PATH
  69       "$ENV{GSL_DIR}/bin"
  70       "$ENV{GSL_DIR}"
  71       "$ENV{GSL_HOME}/bin"
  72       "$ENV{GSL_HOME}"
  73       CACHE STRING "preferred path to GSL (gsl-config)")
  74     FIND_PROGRAM(GSL_CONFIG gsl-config
  75       ${GSL_CONFIG_PREFER_PATH}
  76       /usr/bin/
  77       )
  78     # MESSAGE("DBG GSL_CONFIG ${GSL_CONFIG}")
  79
  80     IF (GSL_CONFIG)
  81
  82       MESSAGE(STATUS "GSL using gsl-config ${GSL_CONFIG}")
  83       # set CXXFLAGS to be fed into CXX_FLAGS by the user:
  84       EXEC_PROGRAM(${GSL_CONFIG}
  85         ARGS --cflags
  86         OUTPUT_VARIABLE  GSL_CXX_FLAGS )
  87       #SET(GSL_CXX_FLAGS "`${GSL_CONFIG} --cflags`")
  88
  89       # set INCLUDE_DIRS to prefix+include
  90       EXEC_PROGRAM(${GSL_CONFIG}
  91         ARGS --prefix
  92         OUTPUT_VARIABLE GSL_PREFIX)
  93       SET(GSL_INCLUDE_DIR ${GSL_PREFIX}/include CACHE STRING INTERNAL)
  94
  95       # set link libraries and link flags
  96
  97       #SET(GSL_LIBRARIES "`${GSL_CONFIG} --libs`")
  98
  99       # extract link dirs for rpath
 100       EXEC_PROGRAM(${GSL_CONFIG}
 101         ARGS --libs
 102         OUTPUT_VARIABLE  GSL_CONFIG_LIBS )
 103       SET(GSL_LIBRARIES "${GSL_CONFIG_LIBS}")
 104
 105       # split off the link dirs (for rpath)
 106       # use regular expression to match wildcard equivalent "-L*<endchar>"
 107       # with <endchar> is a space or a semicolon
 108       STRING(REGEX MATCHALL "[-][L]([^ ;])+"
 109         GSL_LINK_DIRECTORIES_WITH_PREFIX
 110         "${GSL_CONFIG_LIBS}" )
 111       #      MESSAGE("DBG  GSL_LINK_DIRECTORIES_WITH_PREFIX=${GSL_LINK_DIRECTORIES_WITH_PREFIX}")
 112
 113       # remove prefix -L because we need the pure directory for LINK_DIRECTORIES
 114
 115       IF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
 116         STRING(REGEX REPLACE "[-][L]" "" GSL_LINK_DIRECTORIES ${GSL_LINK_DIRECTORIES_WITH_PREFIX} )
 117       ENDIF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
 118       SET(GSL_EXE_LINKER_FLAGS "-Wl,-rpath,${GSL_LINK_DIRECTORIES}" CACHE STRING INTERNAL)
 119       #      MESSAGE("DBG  GSL_LINK_DIRECTORIES=${GSL_LINK_DIRECTORIES}")
 120       #      MESSAGE("DBG  GSL_EXE_LINKER_FLAGS=${GSL_EXE_LINKER_FLAGS}")
 121
 122       #      ADD_DEFINITIONS("-DHAVE_GSL")
 123       #      SET(GSL_DEFINITIONS "-DHAVE_GSL")
 124       MARK_AS_ADVANCED(
 125         GSL_CXX_FLAGS
 126         GSL_INCLUDE_DIR
 127         GSL_LIBRARIES
 128         GSL_LINK_DIRECTORIES
 129         GSL_DEFINITIONS
 130         )
 131       MESSAGE(STATUS "Using GSL from ${GSL_PREFIX}")
 132
 133     ELSE(GSL_CONFIG)
 134
 135       INCLUDE(UsePkgConfig) #needed for PKGCONFIG(...)
 136
 137       MESSAGE(STATUS "GSL using pkgconfig")
 138       #      PKGCONFIG(gsl includedir libdir linkflags cflags)
 139       PKGCONFIG(gsl GSL_INCLUDE_DIR GSL_LINK_DIRECTORIES GSL_LIBRARIES GSL_CXX_FLAGS)
 140       IF(GSL_INCLUDE_DIR)
 141         MARK_AS_ADVANCED(
 142           GSL_CXX_FLAGS
 143           GSL_INCLUDE_DIR
 144           GSL_LIBRARIES
 145           GSL_LINK_DIRECTORIES
 146           )
 147       ENDIF(GSL_INCLUDE_DIR)
 148     ENDIF(GSL_CONFIG)
 149
 150   ENDIF(UNIX)
 151 ENDIF(WIN32)
 152
 153
 154 IF(GSL_LIBRARIES)
 155   IF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
 156
 157     SET(GSL_FOUND 1)
 158
 159   ENDIF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
 160 ENDIF(GSL_LIBRARIES)
 161
 162
 163 # ==========================================
 164 IF(NOT GSL_FOUND)
 165   # make FIND_PACKAGE friendly
 166   IF(NOT GSL_FIND_QUIETLY)
 167     IF(GSL_FIND_REQUIRED)
 168       MESSAGE(FATAL_ERROR "GSL required, please specify it's location.")
 169     ELSE(GSL_FIND_REQUIRED)
 170       MESSAGE(STATUS       "GSL was not found.")
 171     ENDIF(GSL_FIND_REQUIRED)
 172   ENDIF(NOT GSL_FIND_QUIETLY)
 173 ENDIF(NOT GSL_FOUND)