6648 illumos build should be explicit about C standards

*** 1,9 ****
  #ifndef IO_H
  #define IO_H
  
- 
  /* Amount of relocation etherboot is experiencing */
  extern unsigned long virt_offset;
  
  /* Don't require identity mapped physical memory,
   * osloader.c is the only valid user at the moment.
--- 1,10 ----
+ #include <sys/ccompile.h>
+ 
  #ifndef IO_H
  #define IO_H
  
  /* Amount of relocation etherboot is experiencing */
  extern unsigned long virt_offset;
  
  /* Don't require identity mapped physical memory,
   * osloader.c is the only valid user at the moment.
*** 117,127 ****
   * Talk about misusing macros..
   */
  
  #define __OUT1(s,x) \
  extern void __out##s(unsigned x value, unsigned short port); \
! extern inline void __out##s(unsigned x value, unsigned short port) {
  
  #define __OUT2(s,s1,s2) \
  __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
  
  #define __OUT(s,s1,x) \
--- 118,129 ----
   * Talk about misusing macros..
   */
  
  #define __OUT1(s,x) \
  extern void __out##s(unsigned x value, unsigned short port); \
! extern __GNU_INLINE \
! void __out##s(unsigned x value, unsigned short port) {
  
  #define __OUT2(s,s1,s2) \
  __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
  
  #define __OUT(s,s1,x) \
*** 130,140 ****
  __OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); SLOW_DOWN_IO; } \
  __OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); SLOW_DOWN_IO; }
  
  #define __IN1(s,x) \
  extern unsigned x __in##s(unsigned short port); \
! extern inline unsigned x __in##s(unsigned short port) { unsigned x _v;
  
  #define __IN2(s,s1,s2) \
  __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
  
  #define __IN(s,s1,x,i...) \
--- 132,143 ----
  __OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); SLOW_DOWN_IO; } \
  __OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); SLOW_DOWN_IO; }
  
  #define __IN1(s,x) \
  extern unsigned x __in##s(unsigned short port); \
! extern __GNU_INLINE \
! unsigned x __in##s(unsigned short port) { unsigned x _v;
  
  #define __IN2(s,s1,s2) \
  __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
  
  #define __IN(s,s1,x,i...) \
*** 143,159 ****
  __IN1(s##_p,x) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \
  __IN1(s##c_p,x) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; }
  
  #define __INS(s) \
  extern void ins##s(unsigned short port, void * addr, unsigned long count); \
! extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \
  { __asm__ __volatile__ ("cld ; rep ; ins" #s \
  : "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
  
  #define __OUTS(s) \
  extern void outs##s(unsigned short port, const void * addr, unsigned long  count); \
! extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \
  { __asm__ __volatile__ ("cld ; rep ; outs" #s \
  : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
  
  __IN(b,"", char)
  __IN(w,"",short)
--- 146,164 ----
  __IN1(s##_p,x) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \
  __IN1(s##c_p,x) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; }
  
  #define __INS(s) \
  extern void ins##s(unsigned short port, void * addr, unsigned long count); \
! extern __GNU_INLINE \
! void ins##s(unsigned short port, void * addr, unsigned long count)      \
  { __asm__ __volatile__ ("cld ; rep ; ins" #s \
  : "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
  
  #define __OUTS(s) \
  extern void outs##s(unsigned short port, const void * addr, unsigned long  count); \
! extern __GNU_INLINE \
! void outs##s(unsigned short port, const void * addr, unsigned long count) \
  { __asm__ __volatile__ ("cld ; rep ; outs" #s \
  : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }
  
  __IN(b,"", char)
  __IN(w,"",short)