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FindGSL.cmake
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FindGSL.cmake
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##
## Try to find gnu scientific library GSL
## (see http://www.gnu.org/software/gsl/)
## 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
## minor corrections Jan Woetzel
##
## www.mip.informatik.uni-kiel.de
## --------------------------------
##
IF(WIN32)
SET(GSL_MINGW_PREFIX "c:/msys/local" )
SET(GSL_MSVC_PREFIX "$ENV{LIB_DIR}")
FIND_LIBRARY(GSL_LIB gsl PATHS
${GSL_MINGW_PREFIX}/lib
${GSL_MSVC_PREFIX}/lib
)
#MSVC version of the lib is just called 'cblas'
FIND_LIBRARY(GSLCBLAS_LIB gslcblas cblas PATHS
${GSL_MINGW_PREFIX}/lib
${GSL_MSVC_PREFIX}/lib
)
FIND_PATH(GSL_INCLUDE_DIR gsl/gsl_blas.h
${GSL_MINGW_PREFIX}/include
${GSL_MSVC_PREFIX}/include
)
IF (GSL_LIB AND GSLCBLAS_LIB)
SET (GSL_LIBRARIES ${GSL_LIB} ${GSLCBLAS_LIB})
ENDIF (GSL_LIB AND GSLCBLAS_LIB)
ELSE(WIN32)
IF(UNIX)
SET(GSL_CONFIG_PREFER_PATH "$ENV{GSL_HOME}/bin" CACHE STRING "preferred path to GSL (gsl-config)")
FIND_PROGRAM(GSL_CONFIG gsl-config
${GSL_CONFIG_PREFER_PATH}
$ENV{LIB_DIR}/bin
/usr/local/bin/
/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 ${GSL_PREFIX}/include CACHE STRING INTERNAL)
# set link libraries and link flags
EXEC_PROGRAM(${GSL_CONFIG}
ARGS --libs
OUTPUT_VARIABLE GSL_LIBRARIES)
## extract link dirs for rpath
EXEC_PROGRAM(${GSL_CONFIG}
ARGS --libs
OUTPUT_VARIABLE GSL_CONFIG_LIBS )
## split off the link dirs (for rpath)
## use regular expression to match wildcard equivalent "-L*<endchar>"
## with <endchar> is a space or a semicolon
STRING(REGEX MATCHALL "[-][L]([^ ;])+"
GSL_LINK_DIRECTORIES_WITH_PREFIX
"${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
)
ELSE(GSL_CONFIG)
IF (GSL_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could not find gsl-config. Please set it manually. GSL_CONFIG=${GSL_CONFIG}")
ELSE (GSL_FIND_REQUIRED)
MESSAGE(STATUS "Could not find GSL")
# TODO: Avoid cmake complaints if GSL is not found
ENDIF (GSL_FIND_REQUIRED)
ENDIF(GSL_CONFIG)
ENDIF(UNIX)
ENDIF(WIN32)
IF(GSL_LIBRARIES)
IF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
SET(GSL_FOUND 1)
MESSAGE(STATUS "Using GSL from ${GSL_PREFIX}")
ENDIF(GSL_INCLUDE_DIR OR GSL_CXX_FLAGS)
ENDIF(GSL_LIBRARIES)