一、 預編譯
雖然現在我們很少做預編譯，但是理解預編譯的過程對我們還是有不少益處。
範例1：
一個程序LinuxFrame.c
#include "LinuxFrame.h"
void LoadBootCodeFromExDisk();
void startkernel(){
LoadBootCodeFromExDisk();
}
void LoadBootCodeFromExDisk()
{
}
注意這個程序裏面只有兩個空函數。其配套的LinuxFrame.h文件
#ifndef ____LinuxFrame__
#define ____LinuxFrame__
void startkernel();
#endif /* defined(____LinuxFrame__) */
$gcc -E LinuxFrame.h -o LinuxFrame.i
預編譯結果放入LinuxFrame.i中，結果是這樣的：
# 1 "LinuxFrame.c"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 170 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "LinuxFrame.c" 2
# 10 "LinuxFrame.c"
# 1 "./LinuxFrame.h" 1
# 15 "./LinuxFrame.h"
void startkernel();
# 11 "LinuxFrame.c" 2
void LoadBootCodeFromExDisk();
void startkernel(){
LoadBootCodeFromExDisk();
}
void LoadBootCodeFromExDisk()
{
}
幾乎與原文差不多。
範例2：
把LinuxFrame.h添加#include "stdio.h"
LinuxFrame.h變成
#define ____LinuxFrame__
#include <stdio.h>
void startkernel();
#endif /* defined(____LinuxFrame__) */
$gcc -E LinuxFrame.c -o LinuxFrame.i
這個時候結果變成：
# 1 "LinuxFrame.c"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 170 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "LinuxFrame.c" 2
# 10 "LinuxFrame.c"
# 1 "./LinuxFrame.h" 1
# 12 "./LinuxFrame.h"
# 1 "/usr/include/stdio.h" 1 3 4
# 64 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/cdefs.h" 1 3 4
# 484 "/usr/include/sys/cdefs.h" 3 4
# 1 "/usr/include/sys/_symbol_aliasing.h" 1 3 4
# 485 "/usr/include/sys/cdefs.h" 2 3 4
# 550 "/usr/include/sys/cdefs.h" 3 4
# 1 "/usr/include/sys/_posix_availability.h" 1 3 4
# 551 "/usr/include/sys/cdefs.h" 2 3 4
# 65 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/Availability.h" 1 3 4
# 148 "/usr/include/Availability.h" 3 4
# 1 "/usr/include/AvailabilityInternal.h" 1 3 4
# 149 "/usr/include/Availability.h" 2 3 4
# 66 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/_types.h" 1 3 4
# 27 "/usr/include/_types.h" 3 4
# 1 "/usr/include/sys/_types.h" 1 3 4
# 33 "/usr/include/sys/_types.h" 3 4
# 1 "/usr/include/machine/_types.h" 1 3 4
# 32 "/usr/include/machine/_types.h" 3 4
# 1 "/usr/include/i386/_types.h" 1 3 4
# 37 "/usr/include/i386/_types.h" 3 4
typedef signed char __int8_t;
typedef unsigned char __uint8_t;
typedef short __int16_t;
typedef unsigned short __uint16_t;
typedef int __int32_t;
typedef unsigned int __uint32_t;
typedef long long __int64_t;
typedef unsigned long long __uint64_t;
typedef long __darwin_intptr_t;
typedef unsigned int __darwin_natural_t;
# 70 "/usr/include/i386/_types.h" 3 4
typedef int __darwin_ct_rune_t;
typedef union {
char __mbstate8[128];
long long _mbstateL;
} __mbstate_t;
typedef __mbstate_t __darwin_mbstate_t;
typedef long int __darwin_ptrdiff_t;
typedef long unsigned int __darwin_size_t;
typedef __builtin_va_list __darwin_va_list;
typedef int __darwin_wchar_t;
typedef __darwin_wchar_t __darwin_rune_t;
typedef int __darwin_wint_t;
typedef unsigned long __darwin_clock_t;
typedef __uint32_t __darwin_socklen_t;
typedef long __darwin_ssize_t;
typedef long __darwin_time_t;
# 33 "/usr/include/machine/_types.h" 2 3 4
# 34 "/usr/include/sys/_types.h" 2 3 4
# 58 "/usr/include/sys/_types.h" 3 4
struct __darwin_pthread_handler_rec
{
void (*__routine)(void *);
void *__arg;
struct __darwin_pthread_handler_rec *__next;
};
struct _opaque_pthread_attr_t { long __sig; char __opaque[56]; };
struct _opaque_pthread_cond_t { long __sig; char __opaque[40]; };
struct _opaque_pthread_condattr_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_mutex_t { long __sig; char __opaque[56]; };
struct _opaque_pthread_mutexattr_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_once_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_rwlock_t { long __sig; char __opaque[192]; };
struct _opaque_pthread_rwlockattr_t { long __sig; char __opaque[16]; };
struct _opaque_pthread_t { long __sig; struct __darwin_pthread_handler_rec *__cleanup_stack; char __opaque[1168]; };
# 94 "/usr/include/sys/_types.h" 3 4
typedef __int64_t __darwin_blkcnt_t;
typedef __int32_t __darwin_blksize_t;
typedef __int32_t __darwin_dev_t;
typedef unsigned int __darwin_fsblkcnt_t;
typedef unsigned int __darwin_fsfilcnt_t;
typedef __uint32_t __darwin_gid_t;
typedef __uint32_t __darwin_id_t;
typedef __uint64_t __darwin_ino64_t;
typedef __darwin_ino64_t __darwin_ino_t;
typedef __darwin_natural_t __darwin_mach_port_name_t;
typedef __darwin_mach_port_name_t __darwin_mach_port_t;
typedef __uint16_t __darwin_mode_t;
typedef __int64_t __darwin_off_t;
typedef __int32_t __darwin_pid_t;
typedef struct _opaque_pthread_attr_t
__darwin_pthread_attr_t;
typedef struct _opaque_pthread_cond_t
__darwin_pthread_cond_t;
typedef struct _opaque_pthread_condattr_t
__darwin_pthread_condattr_t;
typedef unsigned long __darwin_pthread_key_t;
typedef struct _opaque_pthread_mutex_t
__darwin_pthread_mutex_t;
typedef struct _opaque_pthread_mutexattr_t
__darwin_pthread_mutexattr_t;
typedef struct _opaque_pthread_once_t
__darwin_pthread_once_t;
typedef struct _opaque_pthread_rwlock_t
__darwin_pthread_rwlock_t;
typedef struct _opaque_pthread_rwlockattr_t
__darwin_pthread_rwlockattr_t;
typedef struct _opaque_pthread_t
*__darwin_pthread_t;
typedef __uint32_t __darwin_sigset_t;
typedef __int32_t __darwin_suseconds_t;
typedef __uint32_t __darwin_uid_t;
typedef __uint32_t __darwin_useconds_t;
typedef unsigned char __darwin_uuid_t[16];
typedef char __darwin_uuid_string_t[37];
# 28 "/usr/include/_types.h" 2 3 4
# 39 "/usr/include/_types.h" 3 4
typedef int __darwin_nl_item;
typedef int __darwin_wctrans_t;
typedef __uint32_t __darwin_wctype_t;
# 68 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_va_list.h" 1 3 4
# 31 "/usr/include/sys/_types/_va_list.h" 3 4
typedef __darwin_va_list va_list;
# 72 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_size_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_size_t.h" 3 4
typedef __darwin_size_t size_t;
# 73 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_null.h" 1 3 4
# 74 "/usr/include/stdio.h" 2 3 4
typedef __darwin_off_t fpos_t;
# 86 "/usr/include/stdio.h" 3 4
struct __sbuf {
unsigned char *_base;
int _size;
};
struct __sFILEX;
# 120 "/usr/include/stdio.h" 3 4
typedef struct __sFILE {
unsigned char *_p;
int _r;
int _w;
short _flags;
short _file;
struct __sbuf _bf;
int _lbfsize;
void *_cookie;
int (*_close)(void *);
int (*_read) (void *, char *, int);
fpos_t (*_seek) (void *, fpos_t, int);
int (*_write)(void *, const char *, int);
struct __sbuf _ub;
struct __sFILEX *_extra;
int _ur;
unsigned char _ubuf[3];
unsigned char _nbuf[1];
struct __sbuf _lb;
int _blksize;
fpos_t _offset;
} FILE;
extern FILE *__stdinp;
extern FILE *__stdoutp;
extern FILE *__stderrp;
# 229 "/usr/include/stdio.h" 3 4
void clearerr(FILE *);
int fclose(FILE *);
int feof(FILE *);
int ferror(FILE *);
int fflush(FILE *);
int fgetc(FILE *);
int fgetpos(FILE * restrict, fpos_t *);
char *fgets(char * restrict, int, FILE *);
FILE *fopen(const char * restrict, const char * restrict) __asm("_" "fopen");
int fprintf(FILE * restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
int fputc(int, FILE *);
int fputs(const char * restrict, FILE * restrict) __asm("_" "fputs") ;
size_t fread(void * restrict, size_t, size_t, FILE * restrict);
FILE *freopen(const char * restrict, const char * restrict,
FILE * restrict) __asm("_" "freopen") ;
int fscanf(FILE * restrict, const char * restrict, ...) __attribute__((__format__ (__scanf__, 2, 3)));
int fseek(FILE *, long, int);
int fsetpos(FILE *, const fpos_t *);
long ftell(FILE *);
size_t fwrite(const void * restrict, size_t, size_t, FILE * restrict) __asm("_" "fwrite") ;
int getc(FILE *);
int getchar(void);
char *gets(char *);
void perror(const char *);
int printf(const char * restrict, ...) __attribute__((__format__ (__printf__, 1, 2)));
int putc(int, FILE *);
int putchar(int);
int puts(const char *);
int remove(const char *);
int rename (const char *, const char *);
void rewind(FILE *);
int scanf(const char * restrict, ...) __attribute__((__format__ (__scanf__, 1, 2)));
void setbuf(FILE * restrict, char * restrict);
int setvbuf(FILE * restrict, char * restrict, int, size_t);
int sprintf(char * restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
int sscanf(const char * restrict, const char * restrict, ...) __attribute__((__format__ (__scanf__, 2, 3)));
FILE *tmpfile(void);
__attribute__((deprecated("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tmpnam(3), it is highly recommended that you use mkstemp(3) instead.")))
char *tmpnam(char *);
int ungetc(int, FILE *);
int vfprintf(FILE * restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
int vprintf(const char * restrict, va_list) __attribute__((__format__ (__printf__, 1, 0)));
int vsprintf(char * restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
# 294 "/usr/include/stdio.h" 3 4
char *ctermid(char *);
FILE *fdopen(int, const char *) __asm("_" "fdopen");
int fileno(FILE *);
# 313 "/usr/include/stdio.h" 3 4
int pclose(FILE *);
FILE *popen(const char *, const char *) __asm("_" "popen");
# 335 "/usr/include/stdio.h" 3 4
int __srget(FILE *);
int __svfscanf(FILE *, const char *, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
int __swbuf(int, FILE *);
# 346 "/usr/include/stdio.h" 3 4
inline __attribute__ ((__always_inline__)) int __sputc(int _c, FILE *_p) {
if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
return (*_p->_p++ = _c);
else
return (__swbuf(_c, _p));
}
# 372 "/usr/include/stdio.h" 3 4
void flockfile(FILE *);
int ftrylockfile(FILE *);
void funlockfile(FILE *);
int getc_unlocked(FILE *);
int getchar_unlocked(void);
int putc_unlocked(int, FILE *);
int putchar_unlocked(int);
int getw(FILE *);
int putw(int, FILE *);
__attribute__((deprecated("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tempnam(3), it is highly recommended that you use mkstemp(3) instead.")))
char *tempnam(const char *, const char *) __asm("_" "tempnam") ;
# 409 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/_types/_off_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_off_t.h" 3 4
typedef __darwin_off_t off_t;
# 410 "/usr/include/stdio.h" 2 3 4
int fseeko(FILE *, off_t, int);
off_t ftello(FILE *);
int snprintf(char * restrict, size_t, const char * restrict, ...) __attribute__((__format__ (__printf__, 3, 4)));
int vfscanf(FILE * restrict, const char * restrict, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
int vscanf(const char * restrict, va_list) __attribute__((__format__ (__scanf__, 1, 0)));
int vsnprintf(char * restrict, size_t, const char * restrict, va_list) __attribute__((__format__ (__printf__, 3, 0)));
int vsscanf(const char * restrict, const char * restrict, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
# 434 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/_types/_ssize_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_ssize_t.h" 3 4
typedef __darwin_ssize_t ssize_t;
# 435 "/usr/include/stdio.h" 2 3 4
int dprintf(int, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3))) __attribute__((availability(macosx,introduced=10.7)));
int vdprintf(int, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0))) __attribute__((availability(macosx,introduced=10.7)));
ssize_t getdelim(char ** restrict, size_t * restrict, int, FILE * restrict) __attribute__((availability(macosx,introduced=10.7)));
ssize_t getline(char ** restrict, size_t * restrict, FILE * restrict) __attribute__((availability(macosx,introduced=10.7)));
# 450 "/usr/include/stdio.h" 3 4
extern const int sys_nerr;
extern const char *const sys_errlist[];
int asprintf(char ** restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
char *ctermid_r(char *);
char *fgetln(FILE *, size_t *);
const char *fmtcheck(const char *, const char *);
int fpurge(FILE *);
void setbuffer(FILE *, char *, int);
int setlinebuf(FILE *);
int vasprintf(char ** restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
FILE *zopen(const char *, const char *, int);
FILE *funopen(const void *,
int (*)(void *, char *, int),
int (*)(void *, const char *, int),
fpos_t (*)(void *, fpos_t, int),
int (*)(void *));
# 490 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/secure/_stdio.h" 1 3 4
# 31 "/usr/include/secure/_stdio.h" 3 4
# 1 "/usr/include/secure/_common.h" 1 3 4
# 32 "/usr/include/secure/_stdio.h" 2 3 4
# 42 "/usr/include/secure/_stdio.h" 3 4
extern int __sprintf_chk (char * restrict, int, size_t,
const char * restrict, ...);
# 52 "/usr/include/secure/_stdio.h" 3 4
extern int __snprintf_chk (char * restrict, size_t, int, size_t,
const char * restrict, ...);
extern int __vsprintf_chk (char * restrict, int, size_t,
const char * restrict, va_list);
extern int __vsnprintf_chk (char * restrict, size_t, int, size_t,
const char * restrict, va_list);
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 170 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "LinuxFrame.c" 2
# 10 "LinuxFrame.c"
# 1 "./LinuxFrame.h" 1
# 12 "./LinuxFrame.h"
# 1 "/usr/include/stdio.h" 1 3 4
# 64 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/cdefs.h" 1 3 4
# 484 "/usr/include/sys/cdefs.h" 3 4
# 1 "/usr/include/sys/_symbol_aliasing.h" 1 3 4
# 485 "/usr/include/sys/cdefs.h" 2 3 4
# 550 "/usr/include/sys/cdefs.h" 3 4
# 1 "/usr/include/sys/_posix_availability.h" 1 3 4
# 551 "/usr/include/sys/cdefs.h" 2 3 4
# 65 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/Availability.h" 1 3 4
# 148 "/usr/include/Availability.h" 3 4
# 1 "/usr/include/AvailabilityInternal.h" 1 3 4
# 149 "/usr/include/Availability.h" 2 3 4
# 66 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/_types.h" 1 3 4
# 27 "/usr/include/_types.h" 3 4
# 1 "/usr/include/sys/_types.h" 1 3 4
# 33 "/usr/include/sys/_types.h" 3 4
# 1 "/usr/include/machine/_types.h" 1 3 4
# 32 "/usr/include/machine/_types.h" 3 4
# 1 "/usr/include/i386/_types.h" 1 3 4
# 37 "/usr/include/i386/_types.h" 3 4
typedef signed char __int8_t;
typedef unsigned char __uint8_t;
typedef short __int16_t;
typedef unsigned short __uint16_t;
typedef int __int32_t;
typedef unsigned int __uint32_t;
typedef long long __int64_t;
typedef unsigned long long __uint64_t;
typedef long __darwin_intptr_t;
typedef unsigned int __darwin_natural_t;
# 70 "/usr/include/i386/_types.h" 3 4
typedef int __darwin_ct_rune_t;
typedef union {
char __mbstate8[128];
long long _mbstateL;
} __mbstate_t;
typedef __mbstate_t __darwin_mbstate_t;
typedef long int __darwin_ptrdiff_t;
typedef long unsigned int __darwin_size_t;
typedef __builtin_va_list __darwin_va_list;
typedef int __darwin_wchar_t;
typedef __darwin_wchar_t __darwin_rune_t;
typedef int __darwin_wint_t;
typedef unsigned long __darwin_clock_t;
typedef __uint32_t __darwin_socklen_t;
typedef long __darwin_ssize_t;
typedef long __darwin_time_t;
# 33 "/usr/include/machine/_types.h" 2 3 4
# 34 "/usr/include/sys/_types.h" 2 3 4
# 58 "/usr/include/sys/_types.h" 3 4
struct __darwin_pthread_handler_rec
{
void (*__routine)(void *);
void *__arg;
struct __darwin_pthread_handler_rec *__next;
};
struct _opaque_pthread_attr_t { long __sig; char __opaque[56]; };
struct _opaque_pthread_cond_t { long __sig; char __opaque[40]; };
struct _opaque_pthread_condattr_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_mutex_t { long __sig; char __opaque[56]; };
struct _opaque_pthread_mutexattr_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_once_t { long __sig; char __opaque[8]; };
struct _opaque_pthread_rwlock_t { long __sig; char __opaque[192]; };
struct _opaque_pthread_rwlockattr_t { long __sig; char __opaque[16]; };
struct _opaque_pthread_t { long __sig; struct __darwin_pthread_handler_rec *__cleanup_stack; char __opaque[1168]; };
# 94 "/usr/include/sys/_types.h" 3 4
typedef __int64_t __darwin_blkcnt_t;
typedef __int32_t __darwin_blksize_t;
typedef __int32_t __darwin_dev_t;
typedef unsigned int __darwin_fsblkcnt_t;
typedef unsigned int __darwin_fsfilcnt_t;
typedef __uint32_t __darwin_gid_t;
typedef __uint32_t __darwin_id_t;
typedef __uint64_t __darwin_ino64_t;
typedef __darwin_ino64_t __darwin_ino_t;
typedef __darwin_natural_t __darwin_mach_port_name_t;
typedef __darwin_mach_port_name_t __darwin_mach_port_t;
typedef __uint16_t __darwin_mode_t;
typedef __int64_t __darwin_off_t;
typedef __int32_t __darwin_pid_t;
typedef struct _opaque_pthread_attr_t
__darwin_pthread_attr_t;
typedef struct _opaque_pthread_cond_t
__darwin_pthread_cond_t;
typedef struct _opaque_pthread_condattr_t
__darwin_pthread_condattr_t;
typedef unsigned long __darwin_pthread_key_t;
typedef struct _opaque_pthread_mutex_t
__darwin_pthread_mutex_t;
typedef struct _opaque_pthread_mutexattr_t
__darwin_pthread_mutexattr_t;
typedef struct _opaque_pthread_once_t
__darwin_pthread_once_t;
typedef struct _opaque_pthread_rwlock_t
__darwin_pthread_rwlock_t;
typedef struct _opaque_pthread_rwlockattr_t
__darwin_pthread_rwlockattr_t;
typedef struct _opaque_pthread_t
*__darwin_pthread_t;
typedef __uint32_t __darwin_sigset_t;
typedef __int32_t __darwin_suseconds_t;
typedef __uint32_t __darwin_uid_t;
typedef __uint32_t __darwin_useconds_t;
typedef unsigned char __darwin_uuid_t[16];
typedef char __darwin_uuid_string_t[37];
# 28 "/usr/include/_types.h" 2 3 4
# 39 "/usr/include/_types.h" 3 4
typedef int __darwin_nl_item;
typedef int __darwin_wctrans_t;
typedef __uint32_t __darwin_wctype_t;
# 68 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_va_list.h" 1 3 4
# 31 "/usr/include/sys/_types/_va_list.h" 3 4
typedef __darwin_va_list va_list;
# 72 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_size_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_size_t.h" 3 4
typedef __darwin_size_t size_t;
# 73 "/usr/include/stdio.h" 2 3 4
# 1 "/usr/include/sys/_types/_null.h" 1 3 4
# 74 "/usr/include/stdio.h" 2 3 4
typedef __darwin_off_t fpos_t;
# 86 "/usr/include/stdio.h" 3 4
struct __sbuf {
unsigned char *_base;
int _size;
};
struct __sFILEX;
# 120 "/usr/include/stdio.h" 3 4
typedef struct __sFILE {
unsigned char *_p;
int _r;
int _w;
short _flags;
short _file;
struct __sbuf _bf;
int _lbfsize;
void *_cookie;
int (*_close)(void *);
int (*_read) (void *, char *, int);
fpos_t (*_seek) (void *, fpos_t, int);
int (*_write)(void *, const char *, int);
struct __sbuf _ub;
struct __sFILEX *_extra;
int _ur;
unsigned char _ubuf[3];
unsigned char _nbuf[1];
struct __sbuf _lb;
int _blksize;
fpos_t _offset;
} FILE;
extern FILE *__stdinp;
extern FILE *__stdoutp;
extern FILE *__stderrp;
# 229 "/usr/include/stdio.h" 3 4
void clearerr(FILE *);
int fclose(FILE *);
int feof(FILE *);
int ferror(FILE *);
int fflush(FILE *);
int fgetc(FILE *);
int fgetpos(FILE * restrict, fpos_t *);
char *fgets(char * restrict, int, FILE *);
FILE *fopen(const char * restrict, const char * restrict) __asm("_" "fopen");
int fprintf(FILE * restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
int fputc(int, FILE *);
int fputs(const char * restrict, FILE * restrict) __asm("_" "fputs") ;
size_t fread(void * restrict, size_t, size_t, FILE * restrict);
FILE *freopen(const char * restrict, const char * restrict,
FILE * restrict) __asm("_" "freopen") ;
int fscanf(FILE * restrict, const char * restrict, ...) __attribute__((__format__ (__scanf__, 2, 3)));
int fseek(FILE *, long, int);
int fsetpos(FILE *, const fpos_t *);
long ftell(FILE *);
size_t fwrite(const void * restrict, size_t, size_t, FILE * restrict) __asm("_" "fwrite") ;
int getc(FILE *);
int getchar(void);
char *gets(char *);
void perror(const char *);
int printf(const char * restrict, ...) __attribute__((__format__ (__printf__, 1, 2)));
int putc(int, FILE *);
int putchar(int);
int puts(const char *);
int remove(const char *);
int rename (const char *, const char *);
void rewind(FILE *);
int scanf(const char * restrict, ...) __attribute__((__format__ (__scanf__, 1, 2)));
void setbuf(FILE * restrict, char * restrict);
int setvbuf(FILE * restrict, char * restrict, int, size_t);
int sprintf(char * restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
int sscanf(const char * restrict, const char * restrict, ...) __attribute__((__format__ (__scanf__, 2, 3)));
FILE *tmpfile(void);
__attribute__((deprecated("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tmpnam(3), it is highly recommended that you use mkstemp(3) instead.")))
char *tmpnam(char *);
int ungetc(int, FILE *);
int vfprintf(FILE * restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
int vprintf(const char * restrict, va_list) __attribute__((__format__ (__printf__, 1, 0)));
int vsprintf(char * restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
# 294 "/usr/include/stdio.h" 3 4
char *ctermid(char *);
FILE *fdopen(int, const char *) __asm("_" "fdopen");
int fileno(FILE *);
# 313 "/usr/include/stdio.h" 3 4
int pclose(FILE *);
FILE *popen(const char *, const char *) __asm("_" "popen");
# 335 "/usr/include/stdio.h" 3 4
int __srget(FILE *);
int __svfscanf(FILE *, const char *, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
int __swbuf(int, FILE *);
# 346 "/usr/include/stdio.h" 3 4
inline __attribute__ ((__always_inline__)) int __sputc(int _c, FILE *_p) {
if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n'))
return (*_p->_p++ = _c);
else
return (__swbuf(_c, _p));
}
# 372 "/usr/include/stdio.h" 3 4
void flockfile(FILE *);
int ftrylockfile(FILE *);
void funlockfile(FILE *);
int getc_unlocked(FILE *);
int getchar_unlocked(void);
int putc_unlocked(int, FILE *);
int putchar_unlocked(int);
int getw(FILE *);
int putw(int, FILE *);
__attribute__((deprecated("This function is provided for compatibility reasons only. Due to security concerns inherent in the design of tempnam(3), it is highly recommended that you use mkstemp(3) instead.")))
char *tempnam(const char *, const char *) __asm("_" "tempnam") ;
# 409 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/_types/_off_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_off_t.h" 3 4
typedef __darwin_off_t off_t;
# 410 "/usr/include/stdio.h" 2 3 4
int fseeko(FILE *, off_t, int);
off_t ftello(FILE *);
int snprintf(char * restrict, size_t, const char * restrict, ...) __attribute__((__format__ (__printf__, 3, 4)));
int vfscanf(FILE * restrict, const char * restrict, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
int vscanf(const char * restrict, va_list) __attribute__((__format__ (__scanf__, 1, 0)));
int vsnprintf(char * restrict, size_t, const char * restrict, va_list) __attribute__((__format__ (__printf__, 3, 0)));
int vsscanf(const char * restrict, const char * restrict, va_list) __attribute__((__format__ (__scanf__, 2, 0)));
# 434 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/sys/_types/_ssize_t.h" 1 3 4
# 30 "/usr/include/sys/_types/_ssize_t.h" 3 4
typedef __darwin_ssize_t ssize_t;
# 435 "/usr/include/stdio.h" 2 3 4
int dprintf(int, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3))) __attribute__((availability(macosx,introduced=10.7)));
int vdprintf(int, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0))) __attribute__((availability(macosx,introduced=10.7)));
ssize_t getdelim(char ** restrict, size_t * restrict, int, FILE * restrict) __attribute__((availability(macosx,introduced=10.7)));
ssize_t getline(char ** restrict, size_t * restrict, FILE * restrict) __attribute__((availability(macosx,introduced=10.7)));
# 450 "/usr/include/stdio.h" 3 4
extern const int sys_nerr;
extern const char *const sys_errlist[];
int asprintf(char ** restrict, const char * restrict, ...) __attribute__((__format__ (__printf__, 2, 3)));
char *ctermid_r(char *);
char *fgetln(FILE *, size_t *);
const char *fmtcheck(const char *, const char *);
int fpurge(FILE *);
void setbuffer(FILE *, char *, int);
int setlinebuf(FILE *);
int vasprintf(char ** restrict, const char * restrict, va_list) __attribute__((__format__ (__printf__, 2, 0)));
FILE *zopen(const char *, const char *, int);
FILE *funopen(const void *,
int (*)(void *, char *, int),
int (*)(void *, const char *, int),
fpos_t (*)(void *, fpos_t, int),
int (*)(void *));
# 490 "/usr/include/stdio.h" 3 4
# 1 "/usr/include/secure/_stdio.h" 1 3 4
# 31 "/usr/include/secure/_stdio.h" 3 4
# 1 "/usr/include/secure/_common.h" 1 3 4
# 32 "/usr/include/secure/_stdio.h" 2 3 4
# 42 "/usr/include/secure/_stdio.h" 3 4
extern int __sprintf_chk (char * restrict, int, size_t,
const char * restrict, ...);
# 52 "/usr/include/secure/_stdio.h" 3 4
extern int __snprintf_chk (char * restrict, size_t, int, size_t,
const char * restrict, ...);
extern int __vsprintf_chk (char * restrict, int, size_t,
const char * restrict, va_list);
extern int __vsnprintf_chk (char * restrict, size_t, int, size_t,
const char * restrict, va_list);
# 491 "/usr/include/stdio.h" 2 3 4
# 13 "./LinuxFrame.h" 2
void startkernel();
# 11 "LinuxFrame.c" 2
void LoadBootCodeFromExDisk();
void startkernel(){
LoadBootCodeFromExDisk();
}
void LoadBootCodeFromExDisk()
{
}
# 13 "./LinuxFrame.h" 2
void startkernel();
# 11 "LinuxFrame.c" 2
void LoadBootCodeFromExDisk();
void startkernel(){
LoadBootCodeFromExDisk();
}
void LoadBootCodeFromExDisk()
{
}
有點多是嗎？
我們只是添加了一行#include <stdio.h>，怎麼多了這麼多。
毫無疑問，gcc把stdio.h文件的全部內容包含了進來。