modified the ch32fun cakelists

src/ch32fun/CMakeLists.txt

@@ -1,5 +1,16 @@
-# Compiler flags
-add_compile_options(
+
+add_library(ch32fun OBJECT 
+    ch32fun.c
+)
+
+target_include_directories(ch32fun PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}
+    ${CMAKE_SOURCE_DIR}/inc
+    ${CMAKE_SOURCE_DIR}/src/extralibs
+    ${CMAKE_SOURCE_DIR}/src/ch32fun
+)
+
+target_compile_options(ch32fun PRIVATE
     -g
     -Os
     -flto
@@ -15,17 +26,7 @@ add_compile_options(
     -Wall
 )
 
-add_library(ch32fun OBJECT 
-    ch32fun.c
-)
-
-target_include_directories(ch32fun PUBLIC
-    ${CMAKE_CURRENT_LIST_DIR}
-    ${CMAKE_SOURCE_DIR}/inc
-    ${CMAKE_SOURCE_DIR}/src/extralibs
-    ${CMAKE_SOURCE_DIR}/src/ch32fun
-)
-
 #target_link_libraries(ch32fun PRIVATE
 #    ${CMAKE_SOURCE_DIR}/libgcc.a
 #)
+