revert stm32 CMakeLists due to check ci test sucess

.github/workflows/ci.yml

@@ -48,6 +48,12 @@ jobs:
           cmake -S . -B build -DPICO_SDK_PATH=$PWD/pico-sdk
           cmake --build build --config Debug
           popd
+      - name: Build stm32 examples
+        run: |
+          pushd examples/stm32
+          cmake -S . -B build
+          cmake --build build --config Debug
+          popd
   Test:
     runs-on: ubuntu-latest
     needs: Build  # run after Build job

examples/stm32/CMakeLists.txt

@@ -59,7 +59,15 @@ FetchContent_Declare(
         GIT_SHALLOW TRUE
 )
 
-FetchContent_MakeAvailable(nanomodbus)
+FetchContent_GetProperties(nanomodbus)
+if (NOT nanomodbus_POPULATED)
+    FetchContent_Populate(nanomodbus)
+endif ()
+
+add_library(nanomodbus ${nanomodbus_SOURCE_DIR}/nanomodbus.c)
+target_include_directories(nanomodbus PUBLIC ${nanomodbus_SOURCE_DIR})
+
+# FetchContent_MakeAvailable(nanomodbus)
 
 set(TARGET_NAMES modbus_rtu modbus_tcp)