ESP-IDF: How to add custom compiler-flags
The recommended way of adding custom compiler flags to ESP-IDF projects is to add the following line to the end of main/CMakeLists.txt. Note: Don’t add it to CMakeLists.txt in the project root directory, but in the main/ subdirectory.
main_CMakeLists.txt
target_compile_options(${COMPONENT_LIB} PRIVATE -ffast-math)Replace -ffast-math with your desired compiler flags.
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