FindRuby: Add support for Ruby 2.0 and 2.1

The most significant change since Ruby 1.9 is the changed path of
config.h, from RbConfig::CONFIG['rubyhdrdir'] to
RbConfig::CONFIG['rubyarchhdrdir'].

1 files changed, 20 insertions, 4 deletions

diff --git a/Modules/FindRuby.cmake b/Modules/FindRuby.cmake
index 9d9383d..aafdc09 100644
--- a/Modules/FindRuby.cmake
+++ b/Modules/FindRuby.cmake
@@ -5,7 +5,8 @@
 # Find Ruby
 #
 # This module finds if Ruby is installed and determines where the
-# include files and libraries are.  Ruby 1.8 and 1.9 are supported.
+# 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)
@@ -67,6 +68,8 @@ else()
 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
@@ -79,7 +82,6 @@ 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}']"
@@ -105,6 +107,7 @@ if(RUBY_EXECUTABLE  AND NOT  RUBY_VERSION_MAJOR)
    _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)
 
@@ -126,7 +129,8 @@ if(RUBY_EXECUTABLE  AND NOT  RUBY_VERSION_MAJOR)
    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_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     ${RUBY_SITEARCH_DIR}     CACHE PATH "The Ruby site arch dir" FORCE)
@@ -139,6 +143,7 @@ if(RUBY_EXECUTABLE  AND NOT  RUBY_VERSION_MAJOR)
      RUBY_ARCH_DIR
      RUBY_ARCH
      RUBY_HDR_DIR
+     RUBY_ARCHHDR_DIR
      RUBY_POSSIBLE_LIB_DIR
      RUBY_RUBY_LIB_DIR
      RUBY_SITEARCH_DIR
@@ -160,10 +165,20 @@ if(RUBY_EXECUTABLE AND NOT RUBY_VERSION_MAJOR)
    set(RUBY_VERSION_MINOR 8)
    set(RUBY_VERSION_PATCH 0)
    # check whether we found 1.9.x
-   if(${RUBY_EXECUTABLE} MATCHES "ruby1.?9"  OR  RUBY_HDR_DIR)
+   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)
@@ -189,6 +204,7 @@ if( "${Ruby_FIND_VERSION_SHORT_NODOT}" GREATER 18  OR  "${_RUBY_VERSION_SHORT_NO
      HINTS
      ${RUBY_HDR_DIR}/${RUBY_ARCH}
      ${RUBY_ARCH_DIR}
+     ${RUBY_ARCHHDR_DIR}
      )
 
    set(RUBY_INCLUDE_DIRS ${RUBY_INCLUDE_DIRS} ${RUBY_CONFIG_INCLUDE_DIR} )