sh-2.05b$ gcc expl.c
expl.c: In function `docall':
expl.c:52: warning: cast from pointer to integer of different size
expl.c:54: warning: cast to pointer from integer of different size
expl.c:60: warning: comparison between pointer and integer
expl.c: In function `main':
expl.c:77: warning: integer constant is too large for "long" type
expl.c:78: warning: integer constant is too large for "long" type
expl.c:79: warning: integer constant is too large for "long" type
expl.c:82: warning: cast to pointer from integer of different size
expl.c:115: error: `ORIG_RAX' undeclared (first use in this function)
expl.c:115: error: (Each undeclared identifier is reported only once
expl.c:115: error: for each function it appears in.)

Linux n15 2.6.33.1mtv2 #1 SMP Tue Jul 20 21:31:39 PDT 2010 i686