linux下编程用 编译软件

				/* { dg-do compile { target i?86-*-* x86_64-*-* } } */				/* { dg-options "-O2 -funit-at-a-time -fomit-frame-pointer" } */				/* { dg-skip-if "PR 25214" { ilp32 } { "-fpic" "-fPIC" } { "" } } */				/* { dg-final { scan-assembler-not "sub\[^\\n\]*sp" } } */								static __attribute__ ((noinline)) q ();				int a;								/* This function should not require any stack manipulation				   for preferred stack bounday.  */				void				e ()				{				  if (a)				  {				    e ();				    a--;				  }				  q ();				}								static __attribute__ ((noinline)) q ()				{				}