function cast leads to gcc abort command

[buzush <buzush@xxxxxxxxx>]

hi,

in the following code func.c :
    #include <stdio.h>
    
    int Myfunc1(int i, int z)
    {
    	return i;
    }
    
    int main()
    {
    	int ans;
    
    	/*	casting the function into an 'int (int)' function	*/
    	ans = ((int(*)(int))(Myfunc1))(5);
    
    	printf("ans: %d\n\n", ans);
    
    	return 0;
    }

i tried to cast an int(int,int) function into an int(int) function an got
the gcc warning and note:

    func.c:13:32: warning: function called through a non-compatible type
[enabled by default]
    func.c:13:32: note: if this code is reached, the program will abort

and when trying to run i get:

    Illegal instruction (core dumped)

(but if i compile this file with a .cpp ending with the gcc compiler it
works OK.)
can anyone explain the problem of the compiler in the .c case?




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