> Does anyone can explain to me how the function caml_startup works ?

The source is in asmrun/startup.c.

> Does it relies on malloc or free function or any functions of the C
> library ?

Yes.  In addition to utility functions like printf and scanf, it calls
the runtime system functions defined in byterun/, like GC
initialization, which calls malloc.

-- 
Eric Cooper             e c c @ c m u . e d u