GSL是一个开源的，用C／C++写成的数学函数库，非常流行也非常实用。
我们用cmake 创建 Makefile 文件，熟悉cmake的朋友应该知道，cmake可以直接产生MS studio， Eclipse，QT 等开发环境的工程文件。这里我们产生通用的Makfile文件。
Ubuntu 14.04 下载、安装、配置的相关知识
Ubuntu 14.04系统下载地址：
Windows 7下硬盘安装Ubuntu 14.04图文教程
1. 在Ubuntu Linux下安装GSL： 打开Synaptic Package Manager， 安装libgsl0-dev 和libgsl0ldbl
2. 创建FindGSL.cmake 文件，然后将FindGSL.cmake 移动到 “/usr/share/cmake-2.8/Modules”COMMENTS: .cmake文件很重要，是CMakeLists.txt中findpackage命令的基础，如果没有Find*.cmake文件，在cmake执行findpackage命令是会报错的。
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# Try to find gnu scientific library GSL# See# and# ## 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## # ——————————–
IF(WIN32)# JW tested with gsl-1.8, Windows XP, MSVS 7.1, MSVS 8.0SET(GSL_POSSIBLE_ROOT_DIRS${GSL_ROOT_DIR}$ENV{GSL_ROOT_DIR}${GSL_DIR}${GSL_HOME}$ENV{GSL_DIR}$ENV{GSL_HOME}$ENV{EXTERN_LIBS_DIR}/gsl$ENV{EXTRA}# “C:/home/jw/source2/gsl-1.8”)FIND_PATH(GSL_INCLUDE_DIRNAMES gsl/gsl_cdf.h gsl/gsl_randist.hPATHS ${GSL_POSSIBLE_ROOT_DIRS}PATH_SUFFIXES includeDOC “GSL header include dir”)
FIND_LIBRARY(GSL_GSL_LIBRARYNAMES gsl libgslPATHS ${GSL_POSSIBLE_ROOT_DIRS}PATH_SUFFIXES libDOC “GSL library dir” )
FIND_LIBRARY(GSL_GSLCBLAS_LIBRARYNAMES gslcblas libgslcblasPATHS ${GSL_POSSIBLE_ROOT_DIRS}PATH_SUFFIXES libDOC “GSL cblas library dir” )
SET(GSL_LIBRARIES ${GSL_GSL_LIBRARY})
#MESSAGE(“DBG\n”# “GSL_GSL_LIBRARY=${GSL_GSL_LIBRARY}\n”# “GSL_GSLCBLAS_LIBRARY=${GSL_GSLCBLAS_LIBRARY}\n”# “GSL_LIBRARIES=${GSL_LIBRARIES}”)
ELSE(WIN32)
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)
MESSAGE(STATUS “GSL using gsl-config ${GSL_CONFIG}”)# set CXXFLAGS to be fed into CXX_FLAGS by the user:EXEC_PROGRAM(${GSL_CONFIG} ARGS –cflags OUTPUT_VARIABLE GSL_CXX_FLAGS )#SET(GSL_CXX_FLAGS “`${GSL_CONFIG} –cflags`”)
# set INCLUDE_DIRS to prefix+includeEXEC_PROGRAM(${GSL_CONFIG} ARGS –prefix OUTPUT_VARIABLE GSL_PREFIX)SET(GSL_INCLUDE_DIR ${GSL_PREFIX}/include CACHE STRING INTERNAL)
# set link libraries and link flags
#SET(GSL_LIBRARIES “`${GSL_CONFIG} –libs`”)
# extract link dirs for rpathEXEC_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*”# with is a space or a semicolonSTRING(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}”)
ELSE(GSL_CONFIG)
INCLUDE(UsePkgConfig) #needed for PKGCONFIG(…)
来说是非者，便是是非人。
