CMakeLists.txt - madlib - Git at Google

 # ------------------------------------------------------------------------------
 # MADlib CMake Build Script
 # ------------------------------------------------------------------------------

 # -- Initializations that need to run even before project()

 # For Solaris, we want to use the Sun compiler
 # See http://www.cmake.org/Bug/view.php?id=8530
 set(CMAKE_GENERATOR_CC  suncc gcc)
 set(CMAKE_GENERATOR_CXX sunCC g++)

 # -- CMake setup ---------------------------------------------------------------

 project(MADlib)

 # FindPostgreSQL.cmake needs at least 2.8.3. We are on the safe side and require
 # the minimum version tested, which is 2.8.4.
 cmake_minimum_required(VERSION 2.8.4 FATAL_ERROR)

 include(ExternalProject)
 include(CheckCXXCompilerFlag)

 # -- Local definitions (filenames, paths, etc.) --------------------------------

 # The default MADlib root directory should be "/usr/local/madlib" and not
 # "/usr/local" (which is the CMake default)
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
     set(CMAKE_INSTALL_PREFIX "/usr/local/madlib" CACHE PATH
         "Install path prefix, prepended onto install directories." FORCE
     )
 endif(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)

 set(MADLIB_VERSION_YML ${CMAKE_CURRENT_SOURCE_DIR}/src/config/Version.yml)

 set(MAD_THIRD_PARTY ${CMAKE_BINARY_DIR}/third_party)

 # Set the directory for tools needed during build time
 set(MAD_BUILD_TOOLS ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

 set(EXTERNALPROJECT_LIST_SEPARATOR "~!~")

 if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     set(LINUX TRUE)
 endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")

 if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
     set(SOLARIS TRUE)
 endif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")

 if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
     set(FREEBSD TRUE)
 endif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")

 if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
       "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
       FORCE)
 endif(NOT CMAKE_BUILD_TYPE)

 if(CMAKE_COMPILER_IS_GNUCC)
     # Let's store the gcc version in a variable
     execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
         OUTPUT_VARIABLE GNUCC_VERSION
         OUTPUT_STRIP_TRAILING_WHITESPACE)

     # A useful summary of warning options can be found here:
     # http://developer.apple.com/tools/xcode/compilercodewarnings.html
     # Note: gcc does not implicitly set _POSIX_C_SOURCE or _XOPEN_SOURCE
     # when using -std=c99.
     # http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_02_01_01
     # We specify that we are POSIX.1-2001 compliant and XSI-conforming. We only
     # need to specify _XOPEN_SOURCE as _POSIX_C_SOURCE will be set implicitly.
     set(CMAKE_C_FLAGS "-std=c99 -D_GLIBCXX_USE_CXX11_ABI=0 -pedantic -Wall -Wextra -Wno-clobbered -D_XOPEN_SOURCE=600"
         CACHE STRING
         "Flags used by the compiler during all build types." FORCE)
     if((CMAKE_C_COMPILER_VERSION VERSION_EQUAL 5.0) OR (CMAKE_C_COMPILER_VERSION VERSION_GREATER 5.0))
         # Versions 5+ fail with the "Release" build type i.e. when optimization
         # level is -O3 or greater.
         add_compile_options("-O2")
     endif()

     # See comments below for C++:
     # Weird enough, the following property is set only for C++ but not for C
     # http://stackoverflow.com/questions/3371127/use-isystem-instead-of-i-with-cmake
     set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
 elseif(CMAKE_C_COMPILER_ID STREQUAL "SunPro")
     set(CMAKE_C_FLAGS "-xc99=%all")
 endif()

 if(CMAKE_COMPILER_IS_GNUCXX)
     # Let's store the gcc version in a variable
     execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
         OUTPUT_VARIABLE GNUCXX_VERSION
         OUTPUT_STRIP_TRAILING_WHITESPACE)

     # This flag is specific for i386 and x86-64 families
     # https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html
     CHECK_CXX_COMPILER_FLAG(-mno-sse2 SSE_DISABLE_OPTIONS_AVAILABLE)
     if (SSE_DISABLE_OPTIONS_AVAILABLE)
         set(SSE_DISABLE_OPTIONS "-mno-sse2")
     endif()

     # We need the 1998 standard plus amendments (ISO/IEC 14882:2003) plus TR1
     # Unfortunately, we only get this with gnu++98
     # Special notes:
     # - long long is not part of the C++ 1998/2003 standard, but it is such a
     # common (and useful) extension that we do not want to hear warnings about
     # it.
     set(CMAKE_CXX_FLAGS "-std=gnu++98 -D_GLIBCXX_USE_CXX11_ABI=0 -fdiagnostics-show-option -Wall -Wextra -pedantic -Wconversion -Wno-long-long -Wno-clobbered ${SSE_DISABLE_OPTIONS} -fstrict-aliasing"
         CACHE STRING
         "Flags used by the compiler during all build types." FORCE)

     if((CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5.0) OR (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5.0))
         # Versions 5+ fail with the "Release" build type i.e. when optimization
         # level is -O3 or greater.
         add_compile_options("-O2")
     endif()
     # We want to include some header files as system header files in order to
     # disable warnings. However, on Mac OS X, a CMake variable is not set
     # correctly on Mac OS X. http://www.cmake.org/Bug/view.php?id=10837
     if(APPLE)
         set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-isystem ")
     endif(APPLE)
 elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
     set(CMAKE_CXX_FLAGS "-stdlib=libstdc++")
 endif(CMAKE_COMPILER_IS_GNUCXX)

 # force a `m4_' prefix to all builtins
 if(FREEBSD)
 set(M4_ARGUMENTS "-P")
 else()
 set(M4_ARGUMENTS "--prefix-builtins")
 endif()

 # -- Local includes ------------------------------------------------------------

 list(APPEND CMAKE_MODULE_PATH
     "${MAD_BUILD_TOOLS}")

 # -- Include all parts ---------------------------------------------------------

 include(Utils)
 include(LinuxUtils)
 include(OSXUtils)
 include(Options)

 # -- Get madlib version info ----------------------------------------------------
 # Read and parse Version.yml file
 file(READ "${MADLIB_VERSION_YML}" _MADLIB_VERSION_CONTENTS)
 string(REGEX REPLACE "^.*version:[ \t]*([^\n]*)\n.*" "\\1" MADLIB_VERSION_STRING "${_MADLIB_VERSION_CONTENTS}")

 string(REPLACE "-" "_" MADLIB_VERSION_STRING_NO_HYPHEN "${MADLIB_VERSION_STRING}")

 string(REGEX REPLACE "([0-9]+).*" "\\1" MADLIB_VERSION_MAJOR "${MADLIB_VERSION_STRING}")
 string(REGEX REPLACE "[0-9]+\\.([0-9]+).*" "\\1" MADLIB_VERSION_MINOR "${MADLIB_VERSION_STRING}")
 if("${MADLIB_VERSION_STRING}" MATCHES "[0-9]+\\.[0-9]+\\.([0-9]+).*")
     string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" MADLIB_VERSION_PATCH "${MADLIB_VERSION_STRING}")
 else()
     set(MADLIB_VERSION_PATCH 0)
 endif()

 # Save build time
 execute_process(
     COMMAND date -u
     OUTPUT_VARIABLE MADLIB_BUILD_TIME
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 # Save git revision
 execute_process(
     COMMAND git describe
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
     OUTPUT_VARIABLE MADLIB_GIT_REVISION
     ERROR_QUIET
     RESULT_VARIABLE _RESULT
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 if(NOT _RESULT EQUAL 0)
     set(MADLIB_GIT_REVISION "unknown")
 endif(NOT _RESULT EQUAL 0)
 if(CMAKE_COMPILER_IS_GNUCC)
     set(MADLIB_C_COMPILER "gcc ${GNUCC_VERSION}")
 else(CMAKE_COMPILER_IS_GNUCC)
     set(MADLIB_C_COMPILER ${CMAKE_C_COMPILER_ID})
 endif(CMAKE_COMPILER_IS_GNUCC)
 if(CMAKE_COMPILER_IS_GNUCXX)
     set(MADLIB_CXX_COMPILER "g++ ${GNUCC_VERSION}")
 else(CMAKE_COMPILER_IS_GNUCXX)
     set(MADLIB_CXX_COMPILER ${CMAKE_CXX_COMPILER_ID})
 endif(CMAKE_COMPILER_IS_GNUCXX)

 # -- Third-party dependencies: Find m4 -----------------------------------------
 # Unfortunately, we currently rely on GNU m4 due to option --prefix-builtins,
 # which is not POSIX-standardized.
 if(SOLARIS)
     # Solaris ships GNU m4 as gm4, so we want to use that
     find_program(M4_BINARY gm4
         PATHS /usr/sfw/bin
         DOC "Path to the GNU m4 preprocessor."
     )
 else()
     find_program(M4_BINARY m4
         PATHS /usr/local/bin /usr/bin /bin /opt/local/bin
         DOC "Path to the GNU m4 preprocessor."
     )
 endif()

 if(NOT M4_BINARY)
     message(FATAL_ERROR "Cannot find the m4 preprocessor.")
 endif(NOT M4_BINARY)

 # -- Install Read-me files and license directory -------------------------------

 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/licenses"
     DESTINATION .
     COMPONENT core
     PATTERN ".DS_Store" EXCLUDE
 )
 install(
     FILES
         "${CMAKE_CURRENT_SOURCE_DIR}/README.md"
         "${CMAKE_CURRENT_SOURCE_DIR}/RELEASE_NOTES"
     DESTINATION doc
     COMPONENT core
 )
 install(
     FILES
         "${CMAKE_CURRENT_SOURCE_DIR}/NOTICE"
         "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE"
     DESTINATION .
     COMPONENT core
 )


 # -- Add subdirectories --------------------------------------------------------

 add_subdirectory(src)

 # if(CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX)
 #e.g., Clang/Clang++ does not work
 # endif(CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX)
 add_subdirectory(doc)
 add_subdirectory(deploy)

 # -- Install path for specific madlib version ----------------------------------
 set(CMAKE_MADLIB_ROOT "${CMAKE_INSTALL_PREFIX}")
 set(CMAKE_INSTALL_PREFIX "${CMAKE_MADLIB_ROOT}/Versions/${MADLIB_VERSION_STRING}")

 # Move bin to old_bin if upgrading from V0.6 or earlier version
 # below script finds a directory named 'bin' and copies to 'old_bin' ignoring
 # any error messages (eg. if 'bin' does not exist)
 install(CODE "
         EXECUTE_PROCESS(
             COMMAND find ${CMAKE_MADLIB_ROOT}/bin -type d -exec cp -RPf {} ${CMAKE_MADLIB_ROOT}/old_bin \;
             ERROR_FILE /dev/null
         )"
 )
 # remove the 'bin' directory to replace with symbolic link
 install(CODE "
         EXECUTE_PROCESS(
             COMMAND find ${CMAKE_MADLIB_ROOT}/bin -depth -type d -exec rm -r {} \;
             ERROR_FILE /dev/null
         )"
 )

 # Move doc to old_doc if upgrading from V0.6 or earlier version
 install(CODE "
         EXECUTE_PROCESS(
             COMMAND find ${CMAKE_MADLIB_ROOT}/doc -type d -exec cp -RPf {} ${CMAKE_MADLIB_ROOT}/old_doc \;
             ERROR_FILE /dev/null
         )"
 )
 install(CODE "
         EXECUTE_PROCESS(
             COMMAND find ${CMAKE_MADLIB_ROOT}/doc -depth -type d -exec rm -r {} \;
             ERROR_FILE /dev/null
         )"
 )

 install(CODE "
     EXECUTE_PROCESS(COMMAND ln -nsf
            ${CMAKE_INSTALL_PREFIX}
            ${CMAKE_MADLIB_ROOT}/Current
            )"
 )

 # Create symlink bin
 install(CODE "
     EXECUTE_PROCESS(COMMAND ln -nsf
            ${CMAKE_MADLIB_ROOT}/Current/bin
            ${CMAKE_MADLIB_ROOT}/bin
            )"
 )

 # Create symlink doc
 install(CODE "
     EXECUTE_PROCESS(COMMAND ln -nsf
            ${CMAKE_MADLIB_ROOT}/Current/doc
            ${CMAKE_MADLIB_ROOT}/doc
            )
 ")
	# ------------------------------------------------------------------------------
	# MADlib CMake Build Script
	# ------------------------------------------------------------------------------

	# -- Initializations that need to run even before project()

	# For Solaris, we want to use the Sun compiler
	# See http://www.cmake.org/Bug/view.php?id=8530
	set(CMAKE_GENERATOR_CC suncc gcc)
	set(CMAKE_GENERATOR_CXX sunCC g++)

	# -- CMake setup ---------------------------------------------------------------

	project(MADlib)

	# FindPostgreSQL.cmake needs at least 2.8.3. We are on the safe side and require
	# the minimum version tested, which is 2.8.4.
	cmake_minimum_required(VERSION 2.8.4 FATAL_ERROR)

	include(ExternalProject)
	include(CheckCXXCompilerFlag)

	# -- Local definitions (filenames, paths, etc.) --------------------------------

	# The default MADlib root directory should be "/usr/local/madlib" and not
	# "/usr/local" (which is the CMake default)
	if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
	set(CMAKE_INSTALL_PREFIX "/usr/local/madlib" CACHE PATH
	"Install path prefix, prepended onto install directories." FORCE
	)
	endif(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)

	set(MADLIB_VERSION_YML ${CMAKE_CURRENT_SOURCE_DIR}/src/config/Version.yml)

	set(MAD_THIRD_PARTY ${CMAKE_BINARY_DIR}/third_party)

	# Set the directory for tools needed during build time
	set(MAD_BUILD_TOOLS ${CMAKE_CURRENT_SOURCE_DIR}/cmake)

	set(EXTERNALPROJECT_LIST_SEPARATOR "~!~")

	if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
	set(LINUX TRUE)
	endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")

	if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
	set(SOLARIS TRUE)
	endif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")

	if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
	set(FREEBSD TRUE)
	endif(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")

	if(NOT CMAKE_BUILD_TYPE)
	set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
	"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
	FORCE)
	endif(NOT CMAKE_BUILD_TYPE)

	if(CMAKE_COMPILER_IS_GNUCC)
	# Let's store the gcc version in a variable
	execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
	OUTPUT_VARIABLE GNUCC_VERSION
	OUTPUT_STRIP_TRAILING_WHITESPACE)

	# A useful summary of warning options can be found here:
	# http://developer.apple.com/tools/xcode/compilercodewarnings.html
	# Note: gcc does not implicitly set _POSIX_C_SOURCE or _XOPEN_SOURCE
	# when using -std=c99.
	# http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_02_01_01
	# We specify that we are POSIX.1-2001 compliant and XSI-conforming. We only
	# need to specify _XOPEN_SOURCE as _POSIX_C_SOURCE will be set implicitly.
	set(CMAKE_C_FLAGS "-std=c99 -D_GLIBCXX_USE_CXX11_ABI=0 -pedantic -Wall -Wextra -Wno-clobbered -D_XOPEN_SOURCE=600"
	CACHE STRING
	"Flags used by the compiler during all build types." FORCE)
	if((CMAKE_C_COMPILER_VERSION VERSION_EQUAL 5.0) OR (CMAKE_C_COMPILER_VERSION VERSION_GREATER 5.0))
	# Versions 5+ fail with the "Release" build type i.e. when optimization
	# level is -O3 or greater.
	add_compile_options("-O2")
	endif()

	# See comments below for C++:
	# Weird enough, the following property is set only for C++ but not for C
	# http://stackoverflow.com/questions/3371127/use-isystem-instead-of-i-with-cmake
	set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
	elseif(CMAKE_C_COMPILER_ID STREQUAL "SunPro")
	set(CMAKE_C_FLAGS "-xc99=%all")
	endif()

	if(CMAKE_COMPILER_IS_GNUCXX)
	# Let's store the gcc version in a variable
	execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
	OUTPUT_VARIABLE GNUCXX_VERSION
	OUTPUT_STRIP_TRAILING_WHITESPACE)

	# This flag is specific for i386 and x86-64 families
	# https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/i386-and-x86-64-Options.html
	CHECK_CXX_COMPILER_FLAG(-mno-sse2 SSE_DISABLE_OPTIONS_AVAILABLE)
	if (SSE_DISABLE_OPTIONS_AVAILABLE)
	set(SSE_DISABLE_OPTIONS "-mno-sse2")
	endif()

	# We need the 1998 standard plus amendments (ISO/IEC 14882:2003) plus TR1
	# Unfortunately, we only get this with gnu++98
	# Special notes:
	# - long long is not part of the C++ 1998/2003 standard, but it is such a
	# common (and useful) extension that we do not want to hear warnings about
	# it.
	set(CMAKE_CXX_FLAGS "-std=gnu++98 -D_GLIBCXX_USE_CXX11_ABI=0 -fdiagnostics-show-option -Wall -Wextra -pedantic -Wconversion -Wno-long-long -Wno-clobbered ${SSE_DISABLE_OPTIONS} -fstrict-aliasing"
	CACHE STRING
	"Flags used by the compiler during all build types." FORCE)

	if((CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 5.0) OR (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 5.0))
	# Versions 5+ fail with the "Release" build type i.e. when optimization
	# level is -O3 or greater.
	add_compile_options("-O2")
	endif()
	# We want to include some header files as system header files in order to
	# disable warnings. However, on Mac OS X, a CMake variable is not set
	# correctly on Mac OS X. http://www.cmake.org/Bug/view.php?id=10837
	if(APPLE)
	set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-isystem ")
	endif(APPLE)
	elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
	set(CMAKE_CXX_FLAGS "-stdlib=libstdc++")
	endif(CMAKE_COMPILER_IS_GNUCXX)

	# force a `m4_' prefix to all builtins
	if(FREEBSD)
	set(M4_ARGUMENTS "-P")
	else()
	set(M4_ARGUMENTS "--prefix-builtins")
	endif()

	# -- Local includes ------------------------------------------------------------

	list(APPEND CMAKE_MODULE_PATH
	"${MAD_BUILD_TOOLS}")

	# -- Include all parts ---------------------------------------------------------

	include(Utils)
	include(LinuxUtils)
	include(OSXUtils)
	include(Options)

	# -- Get madlib version info ----------------------------------------------------
	# Read and parse Version.yml file
	file(READ "${MADLIB_VERSION_YML}" _MADLIB_VERSION_CONTENTS)
	string(REGEX REPLACE "^.version:[ \t]([^\n])\n." "\\1" MADLIB_VERSION_STRING "${_MADLIB_VERSION_CONTENTS}")

	string(REPLACE "-" "_" MADLIB_VERSION_STRING_NO_HYPHEN "${MADLIB_VERSION_STRING}")

	string(REGEX REPLACE "([0-9]+).*" "\\1" MADLIB_VERSION_MAJOR "${MADLIB_VERSION_STRING}")
	string(REGEX REPLACE "[0-9]+\\.([0-9]+).*" "\\1" MADLIB_VERSION_MINOR "${MADLIB_VERSION_STRING}")
	if("${MADLIB_VERSION_STRING}" MATCHES "[0-9]+\\.[0-9]+\\.([0-9]+).*")
	string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" MADLIB_VERSION_PATCH "${MADLIB_VERSION_STRING}")
	else()
	set(MADLIB_VERSION_PATCH 0)
	endif()

	# Save build time
	execute_process(
	COMMAND date -u
	OUTPUT_VARIABLE MADLIB_BUILD_TIME
	OUTPUT_STRIP_TRAILING_WHITESPACE)
	# Save git revision
	execute_process(
	COMMAND git describe
	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
	OUTPUT_VARIABLE MADLIB_GIT_REVISION
	ERROR_QUIET
	RESULT_VARIABLE _RESULT
	OUTPUT_STRIP_TRAILING_WHITESPACE)
	if(NOT _RESULT EQUAL 0)
	set(MADLIB_GIT_REVISION "unknown")
	endif(NOT _RESULT EQUAL 0)
	if(CMAKE_COMPILER_IS_GNUCC)
	set(MADLIB_C_COMPILER "gcc ${GNUCC_VERSION}")
	else(CMAKE_COMPILER_IS_GNUCC)
	set(MADLIB_C_COMPILER ${CMAKE_C_COMPILER_ID})
	endif(CMAKE_COMPILER_IS_GNUCC)
	if(CMAKE_COMPILER_IS_GNUCXX)
	set(MADLIB_CXX_COMPILER "g++ ${GNUCC_VERSION}")
	else(CMAKE_COMPILER_IS_GNUCXX)
	set(MADLIB_CXX_COMPILER ${CMAKE_CXX_COMPILER_ID})
	endif(CMAKE_COMPILER_IS_GNUCXX)

	# -- Third-party dependencies: Find m4 -----------------------------------------
	# Unfortunately, we currently rely on GNU m4 due to option --prefix-builtins,
	# which is not POSIX-standardized.
	if(SOLARIS)
	# Solaris ships GNU m4 as gm4, so we want to use that
	find_program(M4_BINARY gm4
	PATHS /usr/sfw/bin
	DOC "Path to the GNU m4 preprocessor."
	)
	else()
	find_program(M4_BINARY m4
	PATHS /usr/local/bin /usr/bin /bin /opt/local/bin
	DOC "Path to the GNU m4 preprocessor."
	)
	endif()

	if(NOT M4_BINARY)
	message(FATAL_ERROR "Cannot find the m4 preprocessor.")
	endif(NOT M4_BINARY)

	# -- Install Read-me files and license directory -------------------------------

	install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/licenses"
	DESTINATION .
	COMPONENT core
	PATTERN ".DS_Store" EXCLUDE
	)
	install(
	FILES
	"${CMAKE_CURRENT_SOURCE_DIR}/README.md"
	"${CMAKE_CURRENT_SOURCE_DIR}/RELEASE_NOTES"
	DESTINATION doc
	COMPONENT core
	)
	install(
	FILES
	"${CMAKE_CURRENT_SOURCE_DIR}/NOTICE"
	"${CMAKE_CURRENT_SOURCE_DIR}/LICENSE"
	DESTINATION .
	COMPONENT core
	)


	# -- Add subdirectories --------------------------------------------------------

	add_subdirectory(src)

	# if(CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX)
	#e.g., Clang/Clang++ does not work
	# endif(CMAKE_COMPILER_IS_GNUCC AND CMAKE_COMPILER_IS_GNUCXX)
	add_subdirectory(doc)
	add_subdirectory(deploy)

	# -- Install path for specific madlib version ----------------------------------
	set(CMAKE_MADLIB_ROOT "${CMAKE_INSTALL_PREFIX}")
	set(CMAKE_INSTALL_PREFIX "${CMAKE_MADLIB_ROOT}/Versions/${MADLIB_VERSION_STRING}")

	# Move bin to old_bin if upgrading from V0.6 or earlier version
	# below script finds a directory named 'bin' and copies to 'old_bin' ignoring
	# any error messages (eg. if 'bin' does not exist)
	install(CODE "
	EXECUTE_PROCESS(
	COMMAND find ${CMAKE_MADLIB_ROOT}/bin -type d -exec cp -RPf {} ${CMAKE_MADLIB_ROOT}/old_bin \;
	ERROR_FILE /dev/null
	)"
	)
	# remove the 'bin' directory to replace with symbolic link
	install(CODE "
	EXECUTE_PROCESS(
	COMMAND find ${CMAKE_MADLIB_ROOT}/bin -depth -type d -exec rm -r {} \;
	ERROR_FILE /dev/null
	)"
	)

	# Move doc to old_doc if upgrading from V0.6 or earlier version
	install(CODE "
	EXECUTE_PROCESS(
	COMMAND find ${CMAKE_MADLIB_ROOT}/doc -type d -exec cp -RPf {} ${CMAKE_MADLIB_ROOT}/old_doc \;
	ERROR_FILE /dev/null
	)"
	)
	install(CODE "
	EXECUTE_PROCESS(
	COMMAND find ${CMAKE_MADLIB_ROOT}/doc -depth -type d -exec rm -r {} \;
	ERROR_FILE /dev/null
	)"
	)

	install(CODE "
	EXECUTE_PROCESS(COMMAND ln -nsf
	${CMAKE_INSTALL_PREFIX}
	${CMAKE_MADLIB_ROOT}/Current
	)"
	)

	# Create symlink bin
	install(CODE "
	EXECUTE_PROCESS(COMMAND ln -nsf
	${CMAKE_MADLIB_ROOT}/Current/bin
	${CMAKE_MADLIB_ROOT}/bin
	)"
	)

	# Create symlink doc
	install(CODE "
	EXECUTE_PROCESS(COMMAND ln -nsf
	${CMAKE_MADLIB_ROOT}/Current/doc
	${CMAKE_MADLIB_ROOT}/doc
	)
	")