Add native and cross compiling CMake build support

src/CMakeLists.txt

@@ -1,23 +1,12 @@
-# Build the C files in the mruby src directory
-
-cmake_minimum_required(VERSION 2.6)
-if(CMAKE_VERSION VERSION_GREATER "2.8.0")
-  cmake_policy(SET CMP0012 OLD)
-endif()  
+# build the core mruby C files
 
 find_package(BISON)
-BISON_TARGET(mruby parse.y ${CMAKE_CURRENT_BINARY_DIR}/parse.c)
+bison_target(mruby parse.y "${CMAKE_CURRENT_BINARY_DIR}/parse.c")
 
-# configure_file("config.in.h" "config.h")
 file(GLOB MRUBY_SRC_C "*.c")
-add_library(ritevm_object OBJECT ${MRUBY_SRC_C})
-add_library(ritevm_static STATIC $<TARGET_OBJECTS:ritevm_object>)
-add_library(ritevm SHARED $<TARGET_OBJECTS:ritevm_object>)
+list(APPEND MRUBY_SRC_C "${CMAKE_CURRENT_BINARY_DIR}/parse.c")
 
+add_library(mruby_object OBJECT ${MRUBY_SRC_C} ${BISON_mruby_OUTPUTS})
+add_library(mruby_static STATIC EXCLUDE_FROM_ALL $<TARGET_OBJECTS:mruby_object>)
 
-# target_link_libraries(ritevm ${MRUBY_LIBS})
-# target_link_libraries(ritevm_static ${MRUBY_LIBS})
-#  install(TARGETS ritevm ritevm_static
-#         LIBRARY DESTINATION lib
-#         ARCHIVE DESTINATION lib)
-
+# vim: ts=2 sts=2 sw=2 et