GNU C Complier

查看 gcc 版本 :gcc -v

文件后缀名  .c的后缀 为C语言的文件源码

gcc  -o output

gcc -o 输出文件名字 输入文件名

gcc -v -o  output 输出gcc 编译过程的所需文件信息

预处理—— -E 让GCC编译预处理后就停止——对文件进行替换#define #include

#  "1.c"
# "<built-in>"
# "<command-line>"
# "/usr/include/stdc-predef.h"
# "<command-line>"
# "1.c"
# "/usr/include/stdio.h"
# "/usr/include/stdio.h"
# "/usr/include/features.h"
# "/usr/include/features.h"
# "/usr/include/x86_64-linux-gnu/sys/cdefs.h"
# "/usr/include/x86_64-linux-gnu/sys/cdefs.h"
# "/usr/include/x86_64-linux-gnu/bits/wordsize.h"
# "/usr/include/x86_64-linux-gnu/sys/cdefs.h"
# "/usr/include/features.h"
# "/usr/include/features.h"
# "/usr/include/x86_64-linux-gnu/gnu/stubs.h"
# "/usr/include/x86_64-linux-gnu/gnu/stubs.h"
# "/usr/include/x86_64-linux-gnu/gnu/stubs-64.h"
# "/usr/include/x86_64-linux-gnu/gnu/stubs.h"
# "/usr/include/features.h"
# "/usr/include/stdio.h" # "/usr/lib/gcc/x86_64-linux-gnu/5/include/stddef.h"
# "/usr/lib/gcc/x86_64-linux-gnu/5/include/stddef.h" # "/usr/lib/gcc/x86_64-linux-gnu/5/include/stddef.h"
typedef long unsigned int size_t;
# "/usr/include/stdio.h" # "/usr/include/x86_64-linux-gnu/bits/types.h"
# "/usr/include/x86_64-linux-gnu/bits/types.h"
# "/usr/include/x86_64-linux-gnu/bits/wordsize.h"
# "/usr/include/x86_64-linux-gnu/bits/types.h" typedef unsigned char __u_char;
typedef unsigned short int __u_short;
typedef unsigned int __u_int;
typedef unsigned long int __u_long; typedef signed char __int8_t;
typedef unsigned char __uint8_t;
typedef signed short int __int16_t;
typedef unsigned short int __uint16_t;
typedef signed int __int32_t;
typedef unsigned int __uint32_t; typedef signed long int __int64_t;
typedef unsigned long int __uint64_t; typedef long int __quad_t;
typedef unsigned long int __u_quad_t;
# "/usr/include/x86_64-linux-gnu/bits/types.h"
# "/usr/include/x86_64-linux-gnu/bits/typesizes.h"
# "/usr/include/x86_64-linux-gnu/bits/types.h" typedef unsigned long int __dev_t;
typedef unsigned int __uid_t;
typedef unsigned int __gid_t;
typedef unsigned long int __ino_t;
typedef unsigned long int __ino64_t;
typedef unsigned int __mode_t;
typedef unsigned long int __nlink_t;
typedef long int __off_t;
typedef long int __off64_t;
typedef int __pid_t;
typedef struct { int __val[]; } __fsid_t;
typedef long int __clock_t;
typedef unsigned long int __rlim_t;
typedef unsigned long int __rlim64_t;
typedef unsigned int __id_t;
typedef long int __time_t;
typedef unsigned int __useconds_t;
typedef long int __suseconds_t; typedef int __daddr_t;
typedef int __key_t; typedef int __clockid_t; typedef void * __timer_t; typedef long int __blksize_t; typedef long int __blkcnt_t;
typedef long int __blkcnt64_t; typedef unsigned long int __fsblkcnt_t;
typedef unsigned long int __fsblkcnt64_t; typedef unsigned long int __fsfilcnt_t;
typedef unsigned long int __fsfilcnt64_t; typedef long int __fsword_t; typedef long int __ssize_t; typedef long int __syscall_slong_t; typedef unsigned long int __syscall_ulong_t; typedef __off64_t __loff_t;
typedef __quad_t *__qaddr_t;
typedef char *__caddr_t; typedef long int __intptr_t; typedef unsigned int __socklen_t;
# "/usr/include/stdio.h"
# "/usr/include/stdio.h"
struct _IO_FILE; typedef struct _IO_FILE FILE; # "/usr/include/stdio.h"
typedef struct _IO_FILE __FILE;
# "/usr/include/stdio.h"
# "/usr/include/libio.h"
# "/usr/include/libio.h"
# "/usr/include/_G_config.h"
# "/usr/include/_G_config.h"
# "/usr/lib/gcc/x86_64-linux-gnu/5/include/stddef.h"
# "/usr/include/_G_config.h" # "/usr/include/wchar.h"
# "/usr/include/wchar.h"
typedef struct
{
int __count;
union
{ unsigned int __wch; char __wchb[];
} __value;
} __mbstate_t;
# "/usr/include/_G_config.h"
typedef struct
{
__off_t __pos;
__mbstate_t __state;
} _G_fpos_t;
typedef struct
{
__off64_t __pos;
__mbstate_t __state;
} _G_fpos64_t;
# "/usr/include/libio.h"
# "/usr/include/libio.h"
# "/usr/lib/gcc/x86_64-linux-gnu/5/include/stdarg.h"
# "/usr/lib/gcc/x86_64-linux-gnu/5/include/stdarg.h"
typedef __builtin_va_list __gnuc_va_list;
# "/usr/include/libio.h"
# "/usr/include/libio.h"
struct _IO_jump_t; struct _IO_FILE; typedef void _IO_lock_t; struct _IO_marker {
struct _IO_marker *_next;
struct _IO_FILE *_sbuf; int _pos;
# "/usr/include/libio.h"
}; enum __codecvt_result
{
__codecvt_ok,
__codecvt_partial,
__codecvt_error,
__codecvt_noconv
};
# "/usr/include/libio.h"
struct _IO_FILE {
int _flags; char* _IO_read_ptr;
char* _IO_read_end;
char* _IO_read_base;
char* _IO_write_base;
char* _IO_write_ptr;
char* _IO_write_end;
char* _IO_buf_base;
char* _IO_buf_end; char *_IO_save_base;
char *_IO_backup_base;
char *_IO_save_end; struct _IO_marker *_markers; struct _IO_FILE *_chain; int _fileno; int _flags2; __off_t _old_offset; unsigned short _cur_column;
signed char _vtable_offset;
char _shortbuf[]; _IO_lock_t *_lock;
# "/usr/include/libio.h"
__off64_t _offset; void *__pad1;
void *__pad2;
void *__pad3;
void *__pad4; size_t __pad5;
int _mode; char _unused2[ * sizeof (int) - * sizeof (void *) - sizeof (size_t)]; }; typedef struct _IO_FILE _IO_FILE; struct _IO_FILE_plus; extern struct _IO_FILE_plus _IO_2_1_stdin_;
extern struct _IO_FILE_plus _IO_2_1_stdout_;
extern struct _IO_FILE_plus _IO_2_1_stderr_;
# "/usr/include/libio.h"
typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes); typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
size_t __n); typedef int __io_seek_fn (void *__cookie, __off64_t *__pos, int __w); typedef int __io_close_fn (void *__cookie);
# "/usr/include/libio.h"
extern int __underflow (_IO_FILE *);
extern int __uflow (_IO_FILE *);
extern int __overflow (_IO_FILE *, int);
# "/usr/include/libio.h"
extern int _IO_getc (_IO_FILE *__fp);
extern int _IO_putc (int __c, _IO_FILE *__fp);
extern int _IO_feof (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__));
extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__)); extern int _IO_peekc_locked (_IO_FILE *__fp); extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
# "/usr/include/libio.h"
extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
__gnuc_va_list, int *__restrict);
extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
__gnuc_va_list);
extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t);
extern size_t _IO_sgetn (_IO_FILE *, void *, size_t); extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int);
extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int); extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
# "/usr/include/stdio.h" typedef __gnuc_va_list va_list;
# "/usr/include/stdio.h"
typedef __off_t off_t;
# "/usr/include/stdio.h"
typedef __ssize_t ssize_t; typedef _G_fpos_t fpos_t; # "/usr/include/stdio.h"
# "/usr/include/x86_64-linux-gnu/bits/stdio_lim.h"
# "/usr/include/stdio.h" extern struct _IO_FILE *stdin;
extern struct _IO_FILE *stdout;
extern struct _IO_FILE *stderr; extern int remove (const char *__filename) __attribute__ ((__nothrow__ , __leaf__)); extern int rename (const char *__old, const char *__new) __attribute__ ((__nothrow__ , __leaf__)); extern int renameat (int __oldfd, const char *__old, int __newfd,
const char *__new) __attribute__ ((__nothrow__ , __leaf__)); extern FILE *tmpfile (void) ;
# "/usr/include/stdio.h"
extern char *tmpnam (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ; extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ;
# "/usr/include/stdio.h"
extern char *tempnam (const char *__dir, const char *__pfx)
__attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__)) ; extern int fclose (FILE *__stream); extern int fflush (FILE *__stream); # "/usr/include/stdio.h"
extern int fflush_unlocked (FILE *__stream);
# "/usr/include/stdio.h" extern FILE *fopen (const char *__restrict __filename,
const char *__restrict __modes) ; extern FILE *freopen (const char *__restrict __filename,
const char *__restrict __modes,
FILE *__restrict __stream) ;
# "/usr/include/stdio.h" # "/usr/include/stdio.h"
extern FILE *fdopen (int __fd, const char *__modes) __attribute__ ((__nothrow__ , __leaf__)) ;
# "/usr/include/stdio.h"
extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
__attribute__ ((__nothrow__ , __leaf__)) ; extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __attribute__ ((__nothrow__ , __leaf__)) ; extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__ , __leaf__)); extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
int __modes, size_t __n) __attribute__ ((__nothrow__ , __leaf__)); extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
size_t __size) __attribute__ ((__nothrow__ , __leaf__)); extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); extern int fprintf (FILE *__restrict __stream,
const char *__restrict __format, ...); extern int printf (const char *__restrict __format, ...); extern int sprintf (char *__restrict __s,
const char *__restrict __format, ...) __attribute__ ((__nothrow__)); extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
__gnuc_va_list __arg); extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg); extern int vsprintf (char *__restrict __s, const char *__restrict __format,
__gnuc_va_list __arg) __attribute__ ((__nothrow__)); extern int snprintf (char *__restrict __s, size_t __maxlen,
const char *__restrict __format, ...)
__attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, , ))); extern int vsnprintf (char *__restrict __s, size_t __maxlen,
const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, , ))); # "/usr/include/stdio.h"
extern int vdprintf (int __fd, const char *__restrict __fmt,
__gnuc_va_list __arg)
__attribute__ ((__format__ (__printf__, , )));
extern int dprintf (int __fd, const char *__restrict __fmt, ...)
__attribute__ ((__format__ (__printf__, , ))); extern int fscanf (FILE *__restrict __stream,
const char *__restrict __format, ...) ; extern int scanf (const char *__restrict __format, ...) ; extern int sscanf (const char *__restrict __s,
const char *__restrict __format, ...) __attribute__ ((__nothrow__ , __leaf__));
# "/usr/include/stdio.h"
extern int fscanf (FILE *__restrict __stream, const char *__restrict __format, ...) __asm__ ("" "__isoc99_fscanf") ;
extern int scanf (const char *__restrict __format, ...) __asm__ ("" "__isoc99_scanf")
;
extern int sscanf (const char *__restrict __s, const char *__restrict __format, ...) __asm__ ("" "__isoc99_sscanf") __attribute__ ((__nothrow__ , __leaf__)) ;
# "/usr/include/stdio.h" extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
__gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, , ))) ; extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__format__ (__scanf__, , ))) ; extern int vsscanf (const char *__restrict __s,
const char *__restrict __format, __gnuc_va_list __arg)
__attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__format__ (__scanf__, , )));
# "/usr/include/stdio.h"
extern int vfscanf (FILE *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vfscanf") __attribute__ ((__format__ (__scanf__, , ))) ;
extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vscanf") __attribute__ ((__format__ (__scanf__, , ))) ;
extern int vsscanf (const char *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vsscanf") __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__format__ (__scanf__, , )));
# "/usr/include/stdio.h" extern int fgetc (FILE *__stream);
extern int getc (FILE *__stream); extern int getchar (void); # "/usr/include/stdio.h"
extern int getc_unlocked (FILE *__stream);
extern int getchar_unlocked (void);
# "/usr/include/stdio.h"
extern int fgetc_unlocked (FILE *__stream); extern int fputc (int __c, FILE *__stream);
extern int putc (int __c, FILE *__stream); extern int putchar (int __c); # "/usr/include/stdio.h"
extern int fputc_unlocked (int __c, FILE *__stream); extern int putc_unlocked (int __c, FILE *__stream);
extern int putchar_unlocked (int __c); extern int getw (FILE *__stream); extern int putw (int __w, FILE *__stream); extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
;
# "/usr/include/stdio.h" # "/usr/include/stdio.h"
extern __ssize_t __getdelim (char **__restrict __lineptr,
size_t *__restrict __n, int __delimiter,
FILE *__restrict __stream) ;
extern __ssize_t getdelim (char **__restrict __lineptr,
size_t *__restrict __n, int __delimiter,
FILE *__restrict __stream) ; extern __ssize_t getline (char **__restrict __lineptr,
size_t *__restrict __n,
FILE *__restrict __stream) ; extern int fputs (const char *__restrict __s, FILE *__restrict __stream); extern int puts (const char *__s); extern int ungetc (int __c, FILE *__stream); extern size_t fread (void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream) ; extern size_t fwrite (const void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __s); # "/usr/include/stdio.h"
extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream) ;
extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
size_t __n, FILE *__restrict __stream); extern int fseek (FILE *__stream, long int __off, int __whence); extern long int ftell (FILE *__stream) ; extern void rewind (FILE *__stream); # "/usr/include/stdio.h"
extern int fseeko (FILE *__stream, __off_t __off, int __whence); extern __off_t ftello (FILE *__stream) ;
# "/usr/include/stdio.h" extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); extern int fsetpos (FILE *__stream, const fpos_t *__pos);
# "/usr/include/stdio.h" # "/usr/include/stdio.h" extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); extern int feof (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; extern int ferror (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; extern void perror (const char *__s); # "/usr/include/x86_64-linux-gnu/bits/sys_errlist.h"
# "/usr/include/x86_64-linux-gnu/bits/sys_errlist.h"
extern int sys_nerr;
extern const char *const sys_errlist[];
# "/usr/include/stdio.h" extern int fileno (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
# "/usr/include/stdio.h"
extern FILE *popen (const char *__command, const char *__modes) ; extern int pclose (FILE *__stream); extern char *ctermid (char *__s) __attribute__ ((__nothrow__ , __leaf__));
# "/usr/include/stdio.h"
extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
# "/usr/include/stdio.h" # "1.c" # "1.c"
int main(){
printf("hello world\n");
return ;
}

out.i

编译—— gcc -S ——.s文件  cc1

汇编——gcc -c ——.o文件  collect2

链接——gcc -o——可执行文件

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