cmake: how to add compile definitions to one source file, but not to others?

I have a c-project which I cross compile in Windows for STM32. The build works (with clang and gcc) and runs. I want to add specific compile definitions such as -DFOO=1 to one file such as build_info.c. Here is my CMakeLists.txt file:

cmake_minimum_required(VERSION 3.22)

project(stm32cubemx)
add_library(stm32cubemx INTERFACE)

# Enable CMake support for ASM and C languages
enable_language(C ASM)

target_compile_definitions(stm32cubemx INTERFACE 
    USE_HAL_DRIVER 
    STM32L431xx
    $<$<CONFIG:Debug>:DEBUG>
)

target_include_directories(stm32cubemx INTERFACE
    ../../Core/Inc
    ...
)

target_sources(stm32cubemx INTERFACE
    ../../Core/Src/main.c
    ../../Core/Src/build_info.c
    ...
    ../../Core/Startup/startup_stm32l431rctx.s
)

target_link_directories(stm32cubemx INTERFACE
)

target_link_libraries(stm32cubemx INTERFACE
)

# Validate that STM32CubeMX code is compatible with C standard
if(CMAKE_C_STANDARD LESS 11)
    message(ERROR "Generated code requires C11 or higher")
endif()

which is included by this CMakeLists.txt file:

cmake_minimum_required(VERSION 3.22)

# Setup compiler settings
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS ON)


# Define the build type
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Debug")
endif()

# Set the project name
set(CMAKE_PROJECT_NAME stm32_project)

# Include toolchain file
if(CMAKE_C_COMPILER MATCHES "clang")
    message(STATUS "Using Clang toolchain")
    include("cmake/clang.cmake")
elseif(CMAKE_C_COMPILER MATCHES "gcc")
    message(STATUS "Using GCC toolchain")
    include("cmake/gcc-arm-none-eabi.cmake")
else()
    message(FATAL_ERROR "Unsupported compiler! Please use GCC or Clang.")
endif()


# Enable compile command to ease indexing with e.g. clangd
set(CMAKE_EXPORT_COMPILE_COMMANDS TRUE)

# Enable CMake support for ASM and C languages
enable_language(C ASM)

# Core project settings
project(${CMAKE_PROJECT_NAME})
message("Build type: " ${CMAKE_BUILD_TYPE})

# Create an executable object type
add_executable(${CMAKE_PROJECT_NAME})

# Add STM32CubeMX generated sources
add_subdirectory(cmake/stm32cubemx)

# Link directories setup
target_link_directories(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined library search paths
)

# Add sources to executable
target_sources(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user sources here
)

# Add include paths
target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined include paths
)

# Add project symbols (macros)
target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined symbols
)

# Add linked libraries
target_link_libraries(${CMAKE_PROJECT_NAME}
    stm32cubemx

    # Add user defined libraries
)

I've tried multiple things:

set_property(SOURCE ../../Core/Src/build_info.c APPEND PROPERTY COMPILE_OPTIONS FOO=1)

set_source_files_properties(../../Core/Src/build_info.c PROPERTIES COMPILE_DEFINITIONS FOO=1)

target_compile_options(stm32cubemx INTERFACE 
    $<$<MATCH_FILE:../../Core/Src/build_info.c>:-DFOO=1>
)

How do I add a compile definition to one specific file only? Do I have to move the file to a separate folder with a separate CMakeLists.txt file? Or can I split the sources in groups in the same CMakeLists.txt file?

cmake_minimum_required(VERSION 3.22)

project(stm32cubemx)
add_library(stm32cubemx INTERFACE)

# Enable CMake support for ASM and C languages
enable_language(C ASM)

target_compile_definitions(stm32cubemx INTERFACE 
    USE_HAL_DRIVER 
    STM32L431xx
    $<$<CONFIG:Debug>:DEBUG>
)

target_include_directories(stm32cubemx INTERFACE
    ../../Core/Inc
    ...
)

target_sources(stm32cubemx INTERFACE
    ../../Core/Src/main.c
    ../../Core/Src/build_info.c
    ...
    ../../Core/Startup/startup_stm32l431rctx.s
)

target_link_directories(stm32cubemx INTERFACE
)

target_link_libraries(stm32cubemx INTERFACE
)

# Validate that STM32CubeMX code is compatible with C standard
if(CMAKE_C_STANDARD LESS 11)
    message(ERROR "Generated code requires C11 or higher")
endif()

which is included by this CMakeLists.txt file:

cmake_minimum_required(VERSION 3.22)

# Setup compiler settings
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS ON)


# Define the build type
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Debug")
endif()

# Set the project name
set(CMAKE_PROJECT_NAME stm32_project)

# Include toolchain file
if(CMAKE_C_COMPILER MATCHES "clang")
    message(STATUS "Using Clang toolchain")
    include("cmake/clang.cmake")
elseif(CMAKE_C_COMPILER MATCHES "gcc")
    message(STATUS "Using GCC toolchain")
    include("cmake/gcc-arm-none-eabi.cmake")
else()
    message(FATAL_ERROR "Unsupported compiler! Please use GCC or Clang.")
endif()


# Enable compile command to ease indexing with e.g. clangd
set(CMAKE_EXPORT_COMPILE_COMMANDS TRUE)

# Enable CMake support for ASM and C languages
enable_language(C ASM)

# Core project settings
project(${CMAKE_PROJECT_NAME})
message("Build type: " ${CMAKE_BUILD_TYPE})

# Create an executable object type
add_executable(${CMAKE_PROJECT_NAME})

# Add STM32CubeMX generated sources
add_subdirectory(cmake/stm32cubemx)

# Link directories setup
target_link_directories(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined library search paths
)

# Add sources to executable
target_sources(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user sources here
)

# Add include paths
target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined include paths
)

# Add project symbols (macros)
target_compile_definitions(${CMAKE_PROJECT_NAME} PRIVATE
    # Add user defined symbols
)

# Add linked libraries
target_link_libraries(${CMAKE_PROJECT_NAME}
    stm32cubemx

    # Add user defined libraries
)

I've tried multiple things:

set_property(SOURCE ../../Core/Src/build_info.c APPEND PROPERTY COMPILE_OPTIONS FOO=1)

set_source_files_properties(../../Core/Src/build_info.c PROPERTIES COMPILE_DEFINITIONS FOO=1)

target_compile_options(stm32cubemx INTERFACE 
    $<$<MATCH_FILE:../../Core/Src/build_info.c>:-DFOO=1>
)

Share Improve this question edited yesterday asked yesterday elechris 4543 silver badges16 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

I don't have a way to test it (not currently using cmake in my projects at work), but

https://www.google/search?q=cmake+set+compile+option+for+single+source+file&rlz=1C1GCEB_enUS1071US1071&oq=cmake+set+compile+option+for+single+source+file&gs_lcrp=EgZjaHJvbWUyCQgAEEUYORigATIHCAEQIRigATIHCAIQIRigATIHCAMQIRigATIHCAQQIRigATIHCAUQIRifBdIBCDgzNDJqMGo3qAIAsAIA&sourceid=chrome&ie=UTF-8

Says

    add_executable(my_target my_file.cpp other_file.cpp)
    set_source_files_properties(my_file.cpp PROPERTIES 
        COMPILE_FLAGS "-Wno-unused-variable")

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cmake: how to add compile definitions to one source file, but not to others? - Stack Overflow

1 Answer 1

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