Dependency to Arduino is optional

Author: pschatzmann

CMakeLists.txt

@@ -2,21 +2,11 @@ cmake_minimum_required(VERSION 3.16)
 
 # set the project name
 project(arduino_helix)
-include(FetchContent)
 
 # lots of warnings and all warnings as errors
 ## add_compile_options(-Wall -Wextra )
 set(CMAKE_CXX_STANDARD 17)
 
-# Build with Linux Arduino Emulator
-FetchContent_Declare(arduino_emulator GIT_REPOSITORY "https://github.com/pschatzmann/Arduino-Emulator.git" GIT_TAG main )
-FetchContent_GetProperties(arduino_emulator)
-if(NOT arduino_emulator_POPULATED)
-    FetchContent_Populate(arduino_emulator)
-    add_subdirectory(${arduino_emulator_SOURCE_DIR})
-endif()
-
-
 file(GLOB_RECURSE SRC_LIST_C CONFIGURE_DEPENDS  "${PROJECT_SOURCE_DIR}/src/*.c" )
 
 # define libraries
@@ -28,9 +18,6 @@ target_compile_options(arduino_helix PRIVATE -DUSE_DEFAULT_STDLIB)
 # define location for header files
 target_include_directories(arduino_helix PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_SOURCE_DIR}/src/libhelix-mp3 ${CMAKE_CURRENT_SOURCE_DIR}/src/libhelix-aac )
 
-# specify libraries
-target_link_libraries(arduino_helix arduino_emulator)
-
 # build examples
 add_subdirectory( "${CMAKE_CURRENT_SOURCE_DIR}/examples/output_mp3")
 add_subdirectory( "${CMAKE_CURRENT_SOURCE_DIR}/examples/output_aac")

examples/output_aac/CMakeLists.txt

@@ -2,13 +2,24 @@ cmake_minimum_required(VERSION 3.16)
 
 # set the project name
 project(aac)
+include(FetchContent)
+
 set (DCMAKE_CXX_FLAGS -Werror -Wall -Wextra)
 set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fno-omit-frame-pointer -fsanitize=address")
 set (CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} -fno-omit-frame-pointer -fsanitize=address")
 
+# Build with Linux Arduino Emulator
+FetchContent_Declare(arduino_emulator GIT_REPOSITORY "https://github.com/pschatzmann/Arduino-Emulator.git" GIT_TAG main )
+FetchContent_GetProperties(arduino_emulator)
+if(NOT arduino_emulator_POPULATED)
+    FetchContent_Populate(arduino_emulator)
+    add_subdirectory(${arduino_emulator_SOURCE_DIR} arduino-emulator)
+endif()
+
+
 # build sketch as executable  
 add_executable (aac desktop_aac.cpp )
 target_compile_options(aac PRIVATE -DEMULATOR)
 
 # specify libraries
-target_link_libraries(aac arduino_helix)
+target_link_libraries(aac arduino_helix arduino_emulator)

examples/output_mp3/CMakeLists.txt

@@ -2,14 +2,24 @@ cmake_minimum_required(VERSION 3.16)
 
 # set the project name
 project(mp3)
+include(FetchContent)
+
 set (DCMAKE_CXX_FLAGS -Werror -Wall -Wextra)
 set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fno-omit-frame-pointer -fsanitize=address")
 set (CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} -fno-omit-frame-pointer -fsanitize=address")
 
+# Build with Linux Arduino Emulator
+FetchContent_Declare(arduino_emulator GIT_REPOSITORY "https://github.com/pschatzmann/Arduino-Emulator.git" GIT_TAG main )
+FetchContent_GetProperties(arduino_emulator)
+if(NOT arduino_emulator_POPULATED)
+    FetchContent_Populate(arduino_emulator)
+    add_subdirectory(${arduino_emulator_SOURCE_DIR} arduino-emulator)
+endif()
+
 # build sketch as executable  
 add_executable (mp3 desktop_mp3.cpp )
 target_compile_options(mp3 PRIVATE -DEMULATOR)
 
 # specify libraries
-target_link_libraries(mp3 arduino_helix)
+target_link_libraries(mp3 arduino_helix arduino_emulator)