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CMake/Modules/FindRuby.cmake
Brad King 86578eccf2 Simplify CMake per-source license notices 
Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.
2016-09-27 15:14:44 -04:00

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindRuby
# --------
#
# Find Ruby
#
# This module finds if Ruby is installed and determines where the
# include files and libraries are. Ruby 1.8, 1.9, 2.0 and 2.1 are
# supported.
#
# The minimum required version of Ruby can be specified using the
# standard syntax, e.g. find_package(Ruby 1.8)
#
# It also determines what the name of the library is. This code sets
# the following variables:
#
# ``RUBY_EXECUTABLE``
# full path to the ruby binary
# ``RUBY_INCLUDE_DIRS``
# include dirs to be used when using the ruby library
# ``RUBY_LIBRARY``
# full path to the ruby library
# ``RUBY_VERSION``
# the version of ruby which was found, e.g. "1.8.7"
# ``RUBY_FOUND``
# set to true if ruby ws found successfully
#
# Also:
#
# ``RUBY_INCLUDE_PATH``
# same as RUBY_INCLUDE_DIRS, only provided for compatibility reasons, don't use it
# RUBY_ARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"archdir"@:>@)'`
# RUBY_SITEARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitearchdir"@:>@)'`
# RUBY_SITEDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitelibdir"@:>@)'`
# RUBY_LIBDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"libdir"@:>@)'`
# RUBY_LIBRUBYARG=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`
# uncomment the following line to get debug output for this file
# set(_RUBY_DEBUG_OUTPUT TRUE)
# Determine the list of possible names of the ruby executable depending
# on which version of ruby is required
set(_RUBY_POSSIBLE_EXECUTABLE_NAMES ruby)
# if 1.9 is required, don't look for ruby18 and ruby1.8, default to version 1.8
if(DEFINED Ruby_FIND_VERSION_MAJOR AND DEFINED Ruby_FIND_VERSION_MINOR)
set(Ruby_FIND_VERSION_SHORT_NODOT "${Ruby_FIND_VERSION_MAJOR}${RUBY_FIND_VERSION_MINOR}")
# we can't construct that if only major version is given
set(_RUBY_POSSIBLE_EXECUTABLE_NAMES
ruby${Ruby_FIND_VERSION_MAJOR}.${Ruby_FIND_VERSION_MINOR}
ruby${Ruby_FIND_VERSION_MAJOR}${Ruby_FIND_VERSION_MINOR}
${_RUBY_POSSIBLE_EXECUTABLE_NAMES})
else()
set(Ruby_FIND_VERSION_SHORT_NODOT "18")
endif()
if(NOT Ruby_FIND_VERSION_EXACT)
list(APPEND _RUBY_POSSIBLE_EXECUTABLE_NAMES ruby2.1 ruby21)
list(APPEND _RUBY_POSSIBLE_EXECUTABLE_NAMES ruby2.0 ruby20)
list(APPEND _RUBY_POSSIBLE_EXECUTABLE_NAMES ruby1.9 ruby19)
# if we want a version below 1.9, also look for ruby 1.8
if("${Ruby_FIND_VERSION_SHORT_NODOT}" VERSION_LESS "19")
list(APPEND _RUBY_POSSIBLE_EXECUTABLE_NAMES ruby1.8 ruby18)
endif()
list(REMOVE_DUPLICATES _RUBY_POSSIBLE_EXECUTABLE_NAMES)
endif()
find_program(RUBY_EXECUTABLE NAMES ${_RUBY_POSSIBLE_EXECUTABLE_NAMES})
if(RUBY_EXECUTABLE AND NOT RUBY_VERSION_MAJOR)
function(_RUBY_CONFIG_VAR RBVAR OUTVAR)
execute_process(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print RbConfig::CONFIG['${RBVAR}']"
RESULT_VARIABLE _RUBY_SUCCESS
OUTPUT_VARIABLE _RUBY_OUTPUT
ERROR_QUIET)
if(_RUBY_SUCCESS OR _RUBY_OUTPUT STREQUAL "")
execute_process(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['${RBVAR}']"
RESULT_VARIABLE _RUBY_SUCCESS
OUTPUT_VARIABLE _RUBY_OUTPUT
ERROR_QUIET)
endif()
set(${OUTVAR} "${_RUBY_OUTPUT}" PARENT_SCOPE)
endfunction()
# query the ruby version
_RUBY_CONFIG_VAR("MAJOR" RUBY_VERSION_MAJOR)
_RUBY_CONFIG_VAR("MINOR" RUBY_VERSION_MINOR)
_RUBY_CONFIG_VAR("TEENY" RUBY_VERSION_PATCH)
# query the different directories
_RUBY_CONFIG_VAR("archdir" RUBY_ARCH_DIR)
_RUBY_CONFIG_VAR("arch" RUBY_ARCH)
_RUBY_CONFIG_VAR("rubyhdrdir" RUBY_HDR_DIR)
_RUBY_CONFIG_VAR("rubyarchhdrdir" RUBY_ARCHHDR_DIR)
_RUBY_CONFIG_VAR("libdir" RUBY_POSSIBLE_LIB_DIR)
_RUBY_CONFIG_VAR("rubylibdir" RUBY_RUBY_LIB_DIR)
# site_ruby
_RUBY_CONFIG_VAR("sitearchdir" RUBY_SITEARCH_DIR)
_RUBY_CONFIG_VAR("sitelibdir" RUBY_SITELIB_DIR)
# vendor_ruby available ?
execute_process(COMMAND ${RUBY_EXECUTABLE} -r vendor-specific -e "print 'true'"
OUTPUT_VARIABLE RUBY_HAS_VENDOR_RUBY ERROR_QUIET)
if(RUBY_HAS_VENDOR_RUBY)
_RUBY_CONFIG_VAR("vendorlibdir" RUBY_VENDORLIB_DIR)
_RUBY_CONFIG_VAR("vendorarchdir" RUBY_VENDORARCH_DIR)
endif()
# save the results in the cache so we don't have to run ruby the next time again
set(RUBY_VERSION_MAJOR ${RUBY_VERSION_MAJOR} CACHE PATH "The Ruby major version" FORCE)
set(RUBY_VERSION_MINOR ${RUBY_VERSION_MINOR} CACHE PATH "The Ruby minor version" FORCE)
set(RUBY_VERSION_PATCH ${RUBY_VERSION_PATCH} CACHE PATH "The Ruby patch version" FORCE)
set(RUBY_ARCH_DIR ${RUBY_ARCH_DIR} CACHE PATH "The Ruby arch dir" FORCE)
set(RUBY_HDR_DIR ${RUBY_HDR_DIR} CACHE PATH "The Ruby header dir (1.9+)" FORCE)
set(RUBY_ARCHHDR_DIR ${RUBY_ARCHHDR_DIR} CACHE PATH "The Ruby arch header dir (2.0+)" FORCE)
set(RUBY_POSSIBLE_LIB_DIR ${RUBY_POSSIBLE_LIB_DIR} CACHE PATH "The Ruby lib dir" FORCE)
set(RUBY_RUBY_LIB_DIR ${RUBY_RUBY_LIB_DIR} CACHE PATH "The Ruby ruby-lib dir" FORCE)
set(RUBY_SITEARCH_DIR ${RUBY_SITEARCH_DIR} CACHE PATH "The Ruby site arch dir" FORCE)
set(RUBY_SITELIB_DIR ${RUBY_SITELIB_DIR} CACHE PATH "The Ruby site lib dir" FORCE)
set(RUBY_HAS_VENDOR_RUBY ${RUBY_HAS_VENDOR_RUBY} CACHE BOOL "Vendor Ruby is available" FORCE)
set(RUBY_VENDORARCH_DIR ${RUBY_VENDORARCH_DIR} CACHE PATH "The Ruby vendor arch dir" FORCE)
set(RUBY_VENDORLIB_DIR ${RUBY_VENDORLIB_DIR} CACHE PATH "The Ruby vendor lib dir" FORCE)
mark_as_advanced(
RUBY_ARCH_DIR
RUBY_ARCH
RUBY_HDR_DIR
RUBY_ARCHHDR_DIR
RUBY_POSSIBLE_LIB_DIR
RUBY_RUBY_LIB_DIR
RUBY_SITEARCH_DIR
RUBY_SITELIB_DIR
RUBY_HAS_VENDOR_RUBY
RUBY_VENDORARCH_DIR
RUBY_VENDORLIB_DIR
RUBY_VERSION_MAJOR
RUBY_VERSION_MINOR
RUBY_VERSION_PATCH
)
endif()
# In case RUBY_EXECUTABLE could not be executed (e.g. cross compiling)
# try to detect which version we found. This is not too good.
if(RUBY_EXECUTABLE AND NOT RUBY_VERSION_MAJOR)
# by default assume 1.8.0
set(RUBY_VERSION_MAJOR 1)
set(RUBY_VERSION_MINOR 8)
set(RUBY_VERSION_PATCH 0)
# check whether we found 1.9.x
if(${RUBY_EXECUTABLE} MATCHES "ruby1.?9")
set(RUBY_VERSION_MAJOR 1)
set(RUBY_VERSION_MINOR 9)
endif()
# check whether we found 2.0.x
if(${RUBY_EXECUTABLE} MATCHES "ruby2.?0")
set(RUBY_VERSION_MAJOR 2)
set(RUBY_VERSION_MINOR 0)
endif()
# check whether we found 2.1.x
if(${RUBY_EXECUTABLE} MATCHES "ruby2.?1")
set(RUBY_VERSION_MAJOR 2)
set(RUBY_VERSION_MINOR 1)
endif()
endif()
if(RUBY_VERSION_MAJOR)
set(RUBY_VERSION "${RUBY_VERSION_MAJOR}.${RUBY_VERSION_MINOR}.${RUBY_VERSION_PATCH}")
set(_RUBY_VERSION_SHORT "${RUBY_VERSION_MAJOR}.${RUBY_VERSION_MINOR}")
set(_RUBY_VERSION_SHORT_NODOT "${RUBY_VERSION_MAJOR}${RUBY_VERSION_MINOR}")
set(_RUBY_NODOT_VERSION "${RUBY_VERSION_MAJOR}${RUBY_VERSION_MINOR}${RUBY_VERSION_PATCH}")
endif()
find_path(RUBY_INCLUDE_DIR
NAMES ruby.h
HINTS
${RUBY_HDR_DIR}
${RUBY_ARCH_DIR}
/usr/lib/ruby/${_RUBY_VERSION_SHORT}/i586-linux-gnu/ )
set(RUBY_INCLUDE_DIRS ${RUBY_INCLUDE_DIR} )
# if ruby > 1.8 is required or if ruby > 1.8 was found, search for the config.h dir
if( "${Ruby_FIND_VERSION_SHORT_NODOT}" GREATER 18 OR "${_RUBY_VERSION_SHORT_NODOT}" GREATER 18 OR RUBY_HDR_DIR)
find_path(RUBY_CONFIG_INCLUDE_DIR
NAMES ruby/config.h config.h
HINTS
${RUBY_HDR_DIR}/${RUBY_ARCH}
${RUBY_ARCH_DIR}
${RUBY_ARCHHDR_DIR}
)
set(RUBY_INCLUDE_DIRS ${RUBY_INCLUDE_DIRS} ${RUBY_CONFIG_INCLUDE_DIR} )
endif()
# Determine the list of possible names for the ruby library
set(_RUBY_POSSIBLE_LIB_NAMES ruby ruby-static ruby${_RUBY_VERSION_SHORT} ruby${_RUBY_VERSION_SHORT_NODOT} ruby-${_RUBY_VERSION_SHORT} ruby-${RUBY_VERSION})
if(WIN32)
set( _RUBY_MSVC_RUNTIME "" )
if( MSVC60 )
set( _RUBY_MSVC_RUNTIME "60" )
endif()
if( MSVC70 )
set( _RUBY_MSVC_RUNTIME "70" )
endif()
if( MSVC71 )
set( _RUBY_MSVC_RUNTIME "71" )
endif()
if( MSVC80 )
set( _RUBY_MSVC_RUNTIME "80" )
endif()
if( MSVC90 )
set( _RUBY_MSVC_RUNTIME "90" )
endif()
set(_RUBY_ARCH_PREFIX "")
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_RUBY_ARCH_PREFIX "x64-")
endif()
list(APPEND _RUBY_POSSIBLE_LIB_NAMES
"${_RUBY_ARCH_PREFIX}msvcr${_RUBY_MSVC_RUNTIME}-ruby${_RUBY_NODOT_VERSION}"
"${_RUBY_ARCH_PREFIX}msvcr${_RUBY_MSVC_RUNTIME}-ruby${_RUBY_NODOT_VERSION}-static"
"${_RUBY_ARCH_PREFIX}msvcrt-ruby${_RUBY_NODOT_VERSION}"
"${_RUBY_ARCH_PREFIX}msvcrt-ruby${_RUBY_NODOT_VERSION}-static" )
endif()
find_library(RUBY_LIBRARY NAMES ${_RUBY_POSSIBLE_LIB_NAMES} HINTS ${RUBY_POSSIBLE_LIB_DIR} )
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
set(_RUBY_REQUIRED_VARS RUBY_EXECUTABLE RUBY_INCLUDE_DIR RUBY_LIBRARY)
if(_RUBY_VERSION_SHORT_NODOT GREATER 18)
list(APPEND _RUBY_REQUIRED_VARS RUBY_CONFIG_INCLUDE_DIR)
endif()
if(_RUBY_DEBUG_OUTPUT)
message(STATUS "--------FindRuby.cmake debug------------")
message(STATUS "_RUBY_POSSIBLE_EXECUTABLE_NAMES: ${_RUBY_POSSIBLE_EXECUTABLE_NAMES}")
message(STATUS "_RUBY_POSSIBLE_LIB_NAMES: ${_RUBY_POSSIBLE_LIB_NAMES}")
message(STATUS "RUBY_ARCH_DIR: ${RUBY_ARCH_DIR}")
message(STATUS "RUBY_HDR_DIR: ${RUBY_HDR_DIR}")
message(STATUS "RUBY_POSSIBLE_LIB_DIR: ${RUBY_POSSIBLE_LIB_DIR}")
message(STATUS "Found RUBY_VERSION: \"${RUBY_VERSION}\" , short: \"${_RUBY_VERSION_SHORT}\", nodot: \"${_RUBY_VERSION_SHORT_NODOT}\"")
message(STATUS "_RUBY_REQUIRED_VARS: ${_RUBY_REQUIRED_VARS}")
message(STATUS "RUBY_EXECUTABLE: ${RUBY_EXECUTABLE}")
message(STATUS "RUBY_LIBRARY: ${RUBY_LIBRARY}")
message(STATUS "RUBY_INCLUDE_DIR: ${RUBY_INCLUDE_DIR}")
message(STATUS "RUBY_CONFIG_INCLUDE_DIR: ${RUBY_CONFIG_INCLUDE_DIR}")
message(STATUS "--------------------")
endif()
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Ruby REQUIRED_VARS ${_RUBY_REQUIRED_VARS}
VERSION_VAR RUBY_VERSION )
mark_as_advanced(
RUBY_EXECUTABLE
RUBY_LIBRARY
RUBY_INCLUDE_DIR
RUBY_CONFIG_INCLUDE_DIR
)
# Set some variables for compatibility with previous version of this file
set(RUBY_POSSIBLE_LIB_PATH ${RUBY_POSSIBLE_LIB_DIR})
set(RUBY_RUBY_LIB_PATH ${RUBY_RUBY_LIB_DIR})
set(RUBY_INCLUDE_PATH ${RUBY_INCLUDE_DIRS})
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