How to debug null-pointer function call within __do_global_dtors_aux()

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I am running into an issue with both gcc-8.3.0 and gcc-9.2.0 where a
null-pointer function call is being done within
__do_global_dtors_aux() which is defined in crtstuff.c .

I have attempted to build GCC using the following export:
export CFLAGS_FOR_TARGET="-g -save-temps -fverbose-asm"
but the assembly file crtstuff.s do not contain the function
__do_global_dtors_aux() even-though its source file crtstuff.c has its
definition.

Any idea ?



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