4.“Do not use standard Start-files”とは？
4.“Do not use standard Start-files”とは？
What is the meaning of the check-box "Do not use standard start files", found in Build settings and selects Tool Settings > C Linker > General?This check-box gives user two options to execute user-defined code before entering main, instead of modifying the Reset-handler. Both are triggered by the libc_init_array call in the startup code.
Option1: Constructors for objects or constructor functions are placed in a list called .init_array. These functions are then executed one by one by the libc_init_array.
Option2: Add code to a .init section. libc_init_array will run the _init function which will execute all instructions added to the .init section. The crti and crtn contains the start and end of the _init function.