How to Configure Linker and Compiler Flags in CMake for arm-linux-androideabi-g ?

Configuring Linker and Compiler Flags in CMake Files

When developing C applications using the arm-linux-androideabi-g compiler, you may encounter situations where adding specific linker or compiler flags is necessary. For instance, to enable exception handling in your code, you need to set the -fexceptions flag.

To configure these flags in CMake files, there are three primary approaches:

• 1. Setting CMAKE Variables:

  One option is to append the flags to existing CMake variables:

  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS}")
  SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")

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• 2. Using Target Properties:

  This method requires knowing the target name and involves modifying the target's compile flags property:

  get_target_property(TEMP ${THE_TARGET} COMPILE_FLAGS)
  SET(TEMP "${TEMP} ${GCC_COVERAGE_COMPILE_FLAGS}")
  set_target_properties(${THE_TARGET} PROPERTIES COMPILE_FLAGS ${TEMP})

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• 3. Adding Definitions:

  Finally, you can directly add the flags as definitions using:

  add_definitions(${GCC_COVERAGE_COMPILE_FLAGS})

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While methods 2 and 3 offer greater flexibility and control over target-specific settings, method 1 is simpler and can be used to set flags for both C and C compilers simultaneously.

By following these approaches, you can effectively configure linker and compiler flags in your CMake files, enabling customization and enhancing the functionality of your C applications.

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