added the compile and link options to the main target options.

src/CMakeLists.txt

@@ -1,19 +1,3 @@
-# Compiler flags
-add_compile_options(
-    -g
-    -Os
-    -flto
-    -ffunction-sections
-    -fdata-sections
-    -fmessage-length=0
-    -msmall-data-limit=8
-    -march=rv32ec
-    -mabi=ilp32e
-    -DCH32V003=1
-    -static-libgcc
-    -nostdlib
-    -Wall
-)
 
 add_executable(${PROJECT_NAME}
     main.c    
@@ -30,11 +14,35 @@ target_link_libraries(${PROJECT_NAME}
     #${CMAKE_SOURCE_DIR}/libgcc.a
 )
 
-target_link_options(${PROJECT_NAME} PRIVATE -static-libgcc)
+target_link_options(${PROJECT_NAME} PRIVATE
+    -Wl,--print-memory-usage
+    -Wl,-Map=${PROJECT_NAME}.map
+    -lgcc
+    -Wl,--gc-sections
+    -T ${CMAKE_SOURCE_DIR}/src/linker_script.ld
+    )
+
+target_compile_options(${PROJECT_NAME} PRIVATE
+    -g
+    -Os
+    -flto
+    -ffunction-sections
+    -fdata-sections
+    -fmessage-length=0
+    -msmall-data-limit=8
+    -march=rv32ec
+    -mabi=ilp32e
+    -DCH32V003=1
+    -static-libgcc
+    -nostdlib
+    -Wall
+)
 
 
 set_target_properties(${PROJECT_NAME} PROPERTIES SUFFIX ".elf")
 
+#target_link_options(${PROJECT_NAME} PRIVATE -static -nostartfiles -T "./linker_script.ld")
+
 # The other "targets" are size, upload, debug, production, etc
 
 #if(NOT TARGET size)