IRCAM SDIF Library的CMake配置文件解析

#
# cmake configuration file
#
# This file is part of the IRCAM SDIF Library (http://www.ircam.fr/sdif)
#
# Copyright (C) 2006 by IRCAM - Centre Pompidou, Paris, France.
#
# created by Axel Roebel                     7.12.2006
#
# This file computes/replaces some default values:
#
# CMAKE_BUILD_TYPE     : default value is "release" other selectable value is "debug"
# PKGCONFIGDIR         : /u/formes/share/lib/$ENV{SYS}/pkgconfig 
#
# The default values can be disabled by means of setting USECMAKEDEFAULTS:BOOL=ON on the command line
# if you choose this you are expected to provide reasonable values for all of the above
# variables or you are happy with the cmake defaults.
#
# On macosx and if the SDKs are available it replaces gcc/c++ by an script that sets
# an environment variable MACOSX_DEPLOYMENT_TARGET to 10.3 (for ppc architectures)
# and 10.4 (for intel architectures) 
#
# For partly replacing the default values you may run cmake twice, first to create
# a CMakeCache.txt with the above default values and second to override some of the default values
# by means of command line arguments.
#
# default values can be reestablished if the related variable is set to the value "default"
#
#  OPTIONS provided
#  USE_THREADS:BOOL=ON/OFF enable disable use of threads

#  BUILD_MING:BOOL=ON/OFF  if cygwin add -mno-cygwin to compiler commands

PROJECT(SDIF)
CMAKE_MINIMUM_REQUIRED(VERSION 2.6.0)

# for cmake 2.6
IF(COMMAND cmake_policy)
  CMAKE_POLICY(SET CMP0003 NEW)
ENDIF(COMMAND cmake_policy)


FILE(READ ${PROJECT_SOURCE_DIR}/configure.in CONFIGIN)
STRING(REGEX REPLACE ".*SDIF_VERSION_MAJOR=\([0-9]+\).*" "\\1" SDIF_VERSION_MAJOR ${CONFIGIN})
STRING(REGEX REPLACE ".*SDIF_VERSION_MINOR=\([0-9]+\).*" "\\1" SDIF_VERSION_MINOR ${CONFIGIN})
STRING(REGEX REPLACE ".*SDIF_VERSION_RELEASE=\([0-9]+\).*" "\\1" SDIF_VERSION_RELEASE ${CONFIGIN})

SET(VERSION  ${SDIF_VERSION_MAJOR}.${SDIF_VERSION_MINOR}.${SDIF_VERSION_RELEASE})
SET(SDIF_VERSION  ${SDIF_VERSION_MAJOR}.${SDIF_VERSION_MINOR}.${SDIF_VERSION_RELEASE})

MESSAGE(STATUS "===============================================================")
MESSAGE(STATUS "== Configuring SDIF   ${VERSION} ")
MESSAGE(STATUS "===============================================================")

SET(PACKAGE "\"SDIF\"")

SET(CMAKE_VERBOSE_MAKEFILE false)
SET(CMAKE_SKIP_RPATH OFF)
SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmModules)