libc/baselibc/syscfg.yml

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syscfg.defs:
    BASELIBC_PRESENT:
        description: "Indicates that baselibc is the libc implementation."
        value: 1

    BASELIBC_ASSERT_FILE_LINE:
        defunct: 1
        description: 'Use OS_CRASH_FILE_LINE instead'
        value: 0

    BASELIBC_EXECUTE_GLOBAL_CONSTRUCTORS:
        description: >
            Set to 1 if project contains C++ files with global objects that
            that need constructors to be executed before main().
            Setting this to 0 reduces code size if there is no need for global
            constructors call.
            It is still possible to use C++ code when this is set to 0 but
            global variable can be in wrong state.
        value: 1