Find libraries, and wrap the ruby native module into a ruby file

diff --git a/cmake/modules/FindRuby.cmake b/cmake/modules/FindRuby.cmake
new file mode 100644 (file)
index 0000000..0ee5da2
--- /dev/null
+++ b/cmake/modules/FindRuby.cmake
@@ -0,0 +1,84 @@
+# - Find Ruby
+# This module finds if Ruby is installed and determines where the include files
+# and libraries are. It also determines what the name of the library is. This
+# code sets the following variables:
+#
+#  RUBY_INCLUDE_PATH = path to where ruby.h can be found
+#  RUBY_EXECUTABLE   = full path to the ruby binary
+
+# Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
+# See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
+
+
+if(RUBY_LIBRARY AND RUBY_INCLUDE_PATH)
+   # Already in cache, be silent
+   set(RUBY_FIND_QUIETLY TRUE)
+endif (RUBY_LIBRARY AND RUBY_INCLUDE_PATH)
+
+#   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"@:>@)'`
+
+FIND_PROGRAM(RUBY_EXECUTABLE NAMES ruby ruby1.8 ruby18 )
+
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['archdir']"
+   OUTPUT_VARIABLE RUBY_ARCH_DIR)
+
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['libdir']"
+   OUTPUT_VARIABLE RUBY_POSSIBLE_LIB_PATH)
+
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['rubylibdir']"
+   OUTPUT_VARIABLE RUBY_RUBY_LIB_PATH)
+
+# site_ruby
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['sitearchdir']"
+   OUTPUT_VARIABLE RUBY_SITEARCH_DIR)
+
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['sitelibdir']"
+   OUTPUT_VARIABLE RUBY_SITELIB_DIR)
+
+
+# vendor_ruby
+EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r vendor-specific -e "print '-rvendor-specific'"
+   OUTPUT_VARIABLE RUBY_VENDOR_ARG)
+
+IF(RUBY_VENDOR_ARG)
+    EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['vendorarchdir']"
+       OUTPUT_VARIABLE RUBY_VENDORARCH_DIR)
+
+    EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['vendorlibdir']"
+       OUTPUT_VARIABLE RUBY_VENDORLIB_DIR)
+ELSE(RUBY_VENDOR_ARG)
+    # fall back to site*dir
+    EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['sitearchdir']"
+       OUTPUT_VARIABLE RUBY_VENDORARCH_DIR)
+
+    EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['sitelibdir']"
+       OUTPUT_VARIABLE RUBY_VENDORLIB_DIR)
+ENDIF(RUBY_VENDOR_ARG)
+
+# this is not needed if you use "print" inside the ruby statements
+# remove the new lines from the output by replacing them with empty strings
+#STRING(REPLACE "\n" "" RUBY_ARCH_DIR "${RUBY_ARCH_DIR}")
+#STRING(REPLACE "\n" "" RUBY_POSSIBLE_LIB_PATH "${RUBY_POSSIBLE_LIB_PATH}")
+#STRING(REPLACE "\n" "" RUBY_RUBY_LIB_PATH "${RUBY_RUBY_LIB_PATH}")
+
+
+FIND_PATH(RUBY_INCLUDE_PATH
+   NAMES ruby.h
+  PATHS
+   ${RUBY_ARCH_DIR}
+  /usr/lib/ruby/1.8/i586-linux-gnu/ )
+
+FIND_LIBRARY(RUBY_LIBRARY
+  NAMES ruby ruby1.8
+  PATHS ${RUBY_POSSIBLE_LIB_PATH}
+  )
+
+MARK_AS_ADVANCED(
+  RUBY_EXECUTABLE
+  RUBY_LIBRARY
+  RUBY_INCLUDE_PATH
+  )