add first version of cmake

hello-world/CMakeLists.txt

@@ -0,0 +1,65 @@
+cmake_minimum_required(VERSION 3.12)
+project(hello-world C)
+
+# Set default board to iss if not specified
+if(NOT DEFINED BOARD)
+    set(BOARD "iss" CACHE STRING "Target board")
+endif()
+
+#set(BSP_BASE "${CMAKE_CURRENT_SOURCE_DIR}/../bare-metal-bsp")
+
+
+
+# Source files
+set(SOURCES
+    hello.c
+)
+
+message(STATUS "Building for board: ${BOARD}")
+message(STATUS "liu:${PROJECT_NAME} ")
+message(STATUS "Using board-specific files from: ${BSP_BASE}/env/${BOARD}")
+
+# Create executable with all objects
+add_executable(${PROJECT_NAME} 
+    ${SOURCES}
+    ${BSP_OBJECTS}
+   
+    
+)
+
+# Link with board library
+target_link_libraries(${PROJECT_NAME}  PRIVATE 
+ ${LIBWRAP_OBJECTS}
+ ${ENV_OBJECTS}
+ #$<TARGET_OBJECTS:env_entry>
+ #$<TARGET_OBJECTS:env_start>
+ )
+
+# Include directories
+target_include_directories(${PROJECT_NAME}  PRIVATE
+    ${BSP_BASE}/include
+    ${BSP_BASE}/drivers
+    ${BSP_BASE}/env
+    ${BSP_BASE}/env/${BOARD}
+    ${BSP_BASE}/libwrap
+)
+
+# Add compile definitions
+target_compile_definitions(${PROJECT_NAME}  PRIVATE
+    BOARD_${BOARD}
+)
+
+# link global_compile_options to this target
+target_link_libraries(${PROJECT_NAME} PRIVATE global_compile_options)
+
+# Set linker options
+target_link_options(${PROJECT_NAME}  PRIVATE
+    -T${BSP_BASE}/env/${BOARD}/link.ld
+    -nostartfiles
+    -Wl,--gc-sections
+)
+
+# Install target
+install(TARGETS ${PROJECT_NAME} 
+    RUNTIME DESTINATION bin
+)