[fpc-pascal] Calling function pointer to main program

[leledumbo]

> I know I can use -XM to set another function name besides "main" but then
how do I call back the original function "main" later?

I quickly analyze the generated assembly when you don't pass -XM:

.globl	main
	.type	main, at function
main:
.globl	PASCALMAIN
	.type	PASCALMAIN, at function
PASCALMAIN:

vs when you do (-XMmymain):

.globl	mymain
	.type	mymain, at function
mymain:
.globl	PASCALMAIN
	.type	PASCALMAIN, at function
PASCALMAIN:

so basically the original main does nothing and jump straight to PASCALMAIN,
which is always there. So you can make your own main in a separate file that
must be linked in during linking which calls whatever name you pass to -XM.



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