BG implemented

cmake/toolchains/gbdk.cmake

@@ -0,0 +1,49 @@
+set(GBDK_HOME "$ENV{GBDK_HOME}")
+if(NOT GBDK_HOME)
+  set(GBDK_HOME "/opt/gbdk")
+  message(STATUS "GBDK_HOME not set, using default: ${GBDK_HOME}")
+endif()
+
+# Use Linux to omit any unwanted file extension in the created ROM file
+set(CMAKE_SYSTEM_NAME Generic)
+
+set(CMAKE_C_COMPILER lcc)
+set(CMAKE_C_COMPILER_FORCED TRUE)
+
+set(GBDK_INCLUDE_DIR ${GBDK_HOME}/include)
+set(GBDK_LIB_DIR ${GBDK_HOME}/lib)
+
+set(CMAKE_PROGRAM_PATH ${GBDK_HOME}/bin)
+set(CMAKE_INCLUDE_PATH ${GBDK_INCLUDE_DIR})
+set(CMAKE_LIBRARY_PATH ${GBDK_LIB_DIR})
+
+
+set(CMAKE_SYSTEM_INCLUDE_PATH ${GBDK_INCLUDE_DIR})
+set(CMAKE_SYSTEM_LIBRARY_PATH  ${GBDK_LIB_DIR})
+
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
+
+function(add_gb_rom target)
+    set(GB_MBC_TYPE 0)
+    if(ARGC GREATER_EQUAL 2)
+        set(GB_MBC_TYPE ${ARGV1})
+    endif()
+    set(GB_ROM_BANKS 2)
+    if(ARGC GREATER_EQUAL 3)
+        set(GB_ROM_BANKS ${ARGV2})
+    endif()
+    set(GB_RAM_BANKS 0)
+    if(ARGC GREATER_EQUAL 4)
+        set(GB_RAM_BANKS ${ARGV3})
+    endif()
+
+
+    set_target_properties(${target} PROPERTIES OUTPUT_NAME ${target} SUFFIX ".gb")
+    target_compile_options(${target} PRIVATE -Wa-l -Wl-m -Wl-j -DUSE_SFR_FOR_REG)
+    target_link_options(${target} PRIVATE "-Wl-yt${GB_MBC_TYPE}" "-Wl-yo${GB_ROM_BANKS}" "-Wl-ya${GB_RAM_BANKS}")
+endfunction()