(XC32) How do I link in my own custom startup code with the XC32 Compiler?

These are the steps to link the customized startup code in XC32:

1

Copy the default startup code crt0.S, available under the folder <Compiler-DIR>\pic32-libs\libpic32\startup, to your project directory.

2

Customize this startup code by making the changes as required.

3

Add this modified startup code (crt0.S) to the MPLAB® X IDE project under Source Files.

You may also change the name of your custom startup code to something like my_startup.S.

4

Set the options to exclude linking of default startup code.

In MPLAB X IDE, go to File > Project Properties > xc32-ld. Select Libraries for Option categories. Check the Do not link startup code option. Click Ok.

5

The code will now link with the customized startup code.

Note that the default startup code source, crt0.S, uses many device-specific macros that should be defined as appropriate for your target device.

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