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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
26IF(WIN32)
27  # JW tested with gsl-1.8, Windows XP, MSVS 7.1
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{EXTRA}
36    "C:/Program Files/GnuWin32"
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 libgsl.dll.a gsl libgsl
47    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
48    PATH_SUFFIXES lib
49    DOC "GSL library" )
50
51  if(NOT GSL_GSL_LIBRARY)
52	FIND_FILE(GSL_GSL_LIBRARY
53		NAMES libgsl.dll.a
54		PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
55		PATH_SUFFIXES lib
56		DOC "GSL library")
57  endif(NOT GSL_GSL_LIBRARY)
58
59  FIND_LIBRARY(GSL_GSLCBLAS_LIBRARY
60    NAMES libgslcblas.dll.a gslcblas libgslcblas
61    PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
62    PATH_SUFFIXES lib
63    DOC "GSL cblas library dir" )
64
65  if(NOT GSL_GSLCBLAS_LIBRARY)
66	FIND_FILE(GSL_GSLCBLAS_LIBRARY
67		NAMES libgslcblas.dll.a
68		PATHS  ${GSL_POSSIBLE_ROOT_DIRS}
69		PATH_SUFFIXES lib
70		DOC "GSL library")
71  endif(NOT GSL_GSLCBLAS_LIBRARY)
72
73  SET(GSL_LIBRARIES ${GSL_GSL_LIBRARY})
74
75  #MESSAGE("DBG\n"
76  #  "GSL_GSL_LIBRARY=${GSL_GSL_LIBRARY}\n"
77  #  "GSL_GSLCBLAS_LIBRARY=${GSL_GSLCBLAS_LIBRARY}\n"
78  #  "GSL_LIBRARIES=${GSL_LIBRARIES}")
79
80
81ELSE(WIN32)
82
83  IF(UNIX)
84    SET(GSL_CONFIG_PREFER_PATH
85      "$ENV{GSL_DIR}/bin"
86      "$ENV{GSL_DIR}"
87      "$ENV{GSL_HOME}/bin"
88      "$ENV{GSL_HOME}"
89      CACHE STRING "preferred path to GSL (gsl-config)")
90    FIND_PROGRAM(GSL_CONFIG gsl-config
91      ${GSL_CONFIG_PREFER_PATH}
92      /usr/bin/
93      )
94    # MESSAGE("DBG GSL_CONFIG ${GSL_CONFIG}")
95
96    IF (GSL_CONFIG)
97      # set CXXFLAGS to be fed into CXX_FLAGS by the user:
98      SET(GSL_CXX_FLAGS "`${GSL_CONFIG} --cflags`")
99
100      # set INCLUDE_DIRS to prefix+include
101      EXEC_PROGRAM(${GSL_CONFIG}
102        ARGS --prefix
103        OUTPUT_VARIABLE GSL_PREFIX)
104      SET(GSL_INCLUDE_DIR ${GSL_PREFIX}/include CACHE STRING INTERNAL)
105
106      # set link libraries and link flags
107      #SET(GSL_LIBRARIES "`${GSL_CONFIG} --libs`")
108      EXEC_PROGRAM(${GSL_CONFIG}
109        ARGS --libs
110        OUTPUT_VARIABLE GSL_LIBRARIES )
111
112      # extract link dirs for rpath
113      EXEC_PROGRAM(${GSL_CONFIG}
114        ARGS --libs
115        OUTPUT_VARIABLE GSL_CONFIG_LIBS )
116
117      # extract version
118      EXEC_PROGRAM(${GSL_CONFIG}
119        ARGS --version
120        OUTPUT_VARIABLE GSL_FULL_VERSION )
121
122      # split version as major/minor
123      STRING(REGEX MATCH "(.)\\..*" GSL_VERSION_MAJOR_ "${GSL_FULL_VERSION}")
124      SET(GSL_VERSION_MAJOR ${CMAKE_MATCH_1})
125      STRING(REGEX MATCH ".\\.(.*)" GSL_VERSION_MINOR_ "${GSL_FULL_VERSION}")
126      SET(GSL_VERSION_MINOR ${CMAKE_MATCH_1})
127
128      # split off the link dirs (for rpath)
129      # use regular expression to match wildcard equivalent "-L*<endchar>"
130      # with <endchar> is a space or a semicolon
131      STRING(REGEX MATCHALL "[-][L]([^ ;])+"
132        GSL_LINK_DIRECTORIES_WITH_PREFIX
133        "${GSL_CONFIG_LIBS}" )
134      #      MESSAGE("DBG  GSL_LINK_DIRECTORIES_WITH_PREFIX=${GSL_LINK_DIRECTORIES_WITH_PREFIX}")
135
136      # remove prefix -L because we need the pure directory for LINK_DIRECTORIES
137
138      IF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
139        STRING(REGEX REPLACE "[-][L]" "" GSL_LINK_DIRECTORIES ${GSL_LINK_DIRECTORIES_WITH_PREFIX} )
140      ENDIF (GSL_LINK_DIRECTORIES_WITH_PREFIX)
141      SET(GSL_EXE_LINKER_FLAGS "-Wl,-rpath,${GSL_LINK_DIRECTORIES}" CACHE STRING INTERNAL)
142      #      MESSAGE("DBG  GSL_LINK_DIRECTORIES=${GSL_LINK_DIRECTORIES}")
143      #      MESSAGE("DBG  GSL_EXE_LINKER_FLAGS=${GSL_EXE_LINKER_FLAGS}")
144
145      #      ADD_DEFINITIONS("-DHAVE_GSL")
146      #      SET(GSL_DEFINITIONS "-DHAVE_GSL")
147      MARK_AS_ADVANCED(
148        GSL_CXX_FLAGS
149        GSL_INCLUDE_DIR
150        GSL_LIBRARIES
151        GSL_LINK_DIRECTORIES
152        GSL_DEFINITIONS
153        )
154      MESSAGE(STATUS "Using GSL from ${GSL_PREFIX}")
155
156    ELSE(GSL_CONFIG)
157      MESSAGE("FindGSL.cmake: gsl-config not found. Please set it manually. GSL_CONFIG=${GSL_CONFIG}")
158    ENDIF(GSL_CONFIG)
159
160  ENDIF(UNIX)
161ENDIF(WIN32)
162
163
164IF(GSL_LIBRARIES)
165  IF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
166
167    SET(GSL_FOUND 1)
168
169  ENDIF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
170ENDIF(GSL_LIBRARIES)
171