gcc编译c语言的整个编译过程可分为预编译->编译->汇编->链接
我们先编辑一个name.c文件
1 # include<stdio.h> 2 int main(int argc, const char *argv[]) 3 { 4 printf("Hello World\n"); 5 return 0; 6 }
预编译：处理#号开头的所有程序行gcc -E name.c -o name.i
name.i文件如下
1 # 1 "name.c" 2 # 1 "<built-in>" 3 # 1 "<command-line>" 4 # 1 "name.c" 5 # 1 "/usr/include/stdio.h" 1 3 4 6 # 28 "/usr/include/stdio.h" 3 4 7 # 1 "/usr/include/features.h" 1 3 4 8 # 324 "/usr/include/features.h" 3 4 9 # 1 "/usr/include/i386-linux-gnu/bits/predefs.h" 1 3 4 10 # 325 "/usr/include/features.h" 2 3 4 11 # 357 "/usr/include/features.h" 3 4 12 # 1 "/usr/include/i386-linux-gnu/sys/cdefs.h" 1 3 4 13 # 378 "/usr/include/i386-linux-gnu/sys/cdefs.h" 3 4 14 # 1 "/usr/include/i386-linux-gnu/bits/wordsize.h" 1 3 4 15 # 379 "/usr/include/i386-linux-gnu/sys/cdefs.h" 2 3 4 16 # 358 "/usr/include/features.h" 2 3 4 17 # 389 "/usr/include/features.h" 3 4 18 # 1 "/usr/include/i386-linux-gnu/gnu/stubs.h" 1 3 4 19 20 # 1 "/usr/include/i386-linux-gnu/gnu/stubs-32.h" 1 3 4 21 # 8 "/usr/include/i386-linux-gnu/gnu/stubs.h" 2 3 4 22 # 390 "/usr/include/features.h" 2 3 4 23 # 29 "/usr/include/stdio.h" 2 3 4 24 25 26 27 28 29 # 1 "/usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h" 1 3 4 30 # 212 "/usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h" 3 4 31 typedef unsigned int size_t; 32 # 35 "/usr/include/stdio.h" 2 3 4 33 34 # 1 "/usr/include/i386-linux-gnu/bits/types.h" 1 3 4 35 # 28 "/usr/include/i386-linux-gnu/bits/types.h" 3 4 36 # 1 "/usr/include/i386-linux-gnu/bits/wordsize.h" 1 3 4 37 # 29 "/usr/include/i386-linux-gnu/bits/types.h" 2 3 4 38 39 40 typedef unsigned char __u_char; 41 typedef unsigned short int __u_short; 42 typedef unsigned int __u_int; 43 typedef unsigned long int __u_long; 44 45 46 typedef signed char __int8_t; 47 typedef unsigned char __uint8_t; 48 typedef signed short int __int16_t; 49 typedef unsigned short int __uint16_t; 50 typedef signed int __int32_t; 51 typedef unsigned int __uint32_t; 52 53 54 55 56 __extension__ typedef signed long long int __int64_t; 57 __extension__ typedef unsigned long long int __uint64_t; 58 59 60 61 62 63 64 __extension__ typedef long long int __quad_t; 65 __extension__ typedef unsigned long long int __u_quad_t; 66 # 131 "/usr/include/i386-linux-gnu/bits/types.h" 3 4 67 # 1 "/usr/include/i386-linux-gnu/bits/typesizes.h" 1 3 4 68 # 132 "/usr/include/i386-linux-gnu/bits/types.h" 2 3 4 69 70 71 __extension__ typedef __u_quad_t __dev_t; 72 __extension__ typedef unsigned int __uid_t; 73 __extension__ typedef unsigned int __gid_t; 74 __extension__ typedef unsigned long int __ino_t; 75 __extension__ typedef __u_quad_t __ino64_t; 76 __extension__ typedef unsigned int __mode_t; 77 __extension__ typedef unsigned int __nlink_t; 78 __extension__ typedef long int __off_t; 79 __extension__ typedef __quad_t __off64_t; 80 __extension__ typedef int __pid_t; 81 __extension__ typedef struct { int __val[2]; } __fsid_t; 82 __extension__ typedef long int __clock_t; 83 __extension__ typedef unsigned long int __rlim_t; 84 __extension__ typedef __u_quad_t __rlim64_t; 85 __extension__ typedef unsigned int __id_t; 86 __extension__ typedef long int __time_t; 87 __extension__ typedef unsigned int __useconds_t; 88 __extension__ typedef long int __suseconds_t; 89 90 __extension__ typedef int __daddr_t; 91 __extension__ typedef long int __swblk_t; 92 __extension__ typedef int __key_t; 93 94 95 __extension__ typedef int __clockid_t; 96 97 98 __extension__ typedef void * __timer_t; 99 100 101 __extension__ typedef long int __blksize_t; 102 103 104 105 106 __extension__ typedef long int __blkcnt_t; 107 __extension__ typedef __quad_t __blkcnt64_t; 108 109 __extension__ typedef unsigned long int __fsblkcnt_t; 110 __extension__ typedef __u_quad_t __fsblkcnt64_t; 111 112 113 __extension__ typedef unsigned long int __fsfilcnt_t; 114 __extension__ typedef __u_quad_t __fsfilcnt64_t; 115 116 __extension__ typedef int __ssize_t; 117 118 119 120 typedef __off64_t __loff_t; 121 typedef __quad_t *__qaddr_t; 122 typedef char *__caddr_t; 123 124 125 __extension__ typedef int __intptr_t; 126 127 128 __extension__ typedef unsigned int __socklen_t; 129 # 37 "/usr/include/stdio.h" 2 3 4 130 # 45 "/usr/include/stdio.h" 3 4 131 struct _IO_FILE; 132 133 134 135 typedef struct _IO_FILE FILE; 136 137 138 139 140 141 # 65 "/usr/include/stdio.h" 3 4 142 typedef struct _IO_FILE __FILE; 143 # 75 "/usr/include/stdio.h" 3 4 144 # 1 "/usr/include/libio.h" 1 3 4 145 # 32 "/usr/include/libio.h" 3 4 146 # 1 "/usr/include/_G_config.h" 1 3 4 147 # 15 "/usr/include/_G_config.h" 3 4 148 # 1 "/usr/lib/gcc/i686-linux-gnu/4.6/include/stddef.h" 1 3 4 149 # 16 "/usr/include/_G_config.h" 2 3 4 150 151 152 153 154 # 1 "/usr/include/wchar.h" 1 3 4 155 # 83 "/usr/include/wchar.h" 3 4 156 typedef struct 157 { 158 int __count; 159 union 160 { 161 162 unsigned int __wch; 163 164 165 166 char __wchb[4]; 167 } __value; 168 } __mbstate_t; 169 # 21 "/usr/include/_G_config.h" 2 3 4 170 171 typedef struct 172 { 173 __off_t __pos; 174 __mbstate_t __state; 175 } _G_fpos_t; 176 typedef struct 177 { 178 __off64_t __pos; 179 __mbstate_t __state; 180 } _G_fpos64_t; 181 # 53 "/usr/include/_G_config.h" 3 4 182 typedef int _G_int16_t __attribute__ ((__mode__ (__HI__))); 183 typedef int _G_int32_t __attribute__ ((__mode__ (__SI__))); 184 typedef unsigned int _G_uint16_t __attribute__ ((__mode__ (__HI__))); 185 typedef unsigned int _G_uint32_t __attribute__ ((__mode__ (__SI__))); 186 # 33 "/usr/include/libio.h" 2 3 4 187 # 53 "/usr/include/libio.h" 3 4 188 # 1 "/usr/lib/gcc/i686-linux-gnu/4.6/include/stdarg.h" 1 3 4 189 # 40 "/usr/lib/gcc/i686-linux-gnu/4.6/include/stdarg.h" 3 4 190 typedef __builtin_va_list __gnuc_va_list; 191 # 54 "/usr/include/libio.h" 2 3 4 192 # 172 "/usr/include/libio.h" 3 4 193 struct _IO_jump_t; struct _IO_FILE; 194 # 182 "/usr/include/libio.h" 3 4 195 typedef void _IO_lock_t; 196 197 198 199 200 201 struct _IO_marker { 202 struct _IO_marker *_next; 203 struct _IO_FILE *_sbuf; 204 205 206 207 int _pos; 208 # 205 "/usr/include/libio.h" 3 4 209 }; 210 211 212 enum __codecvt_result 213 { 214 __codecvt_ok, 215 __codecvt_partial, 216 __codecvt_error, 217 __codecvt_noconv 218 }; 219 # 273 "/usr/include/libio.h" 3 4 220 struct _IO_FILE { 221 int _flags; 222 223 : 224 225 226 227 char* _IO_read_ptr; 228 char* _IO_read_end; 229 char* _IO_read_base; 230 char* _IO_write_base; 231 char* _IO_write_ptr; 232 char* _IO_write_end; 233 char* _IO_buf_base; 234 char* _IO_buf_end; 235 236 char *_IO_save_base; 237 char *_IO_backup_base; 238 char *_IO_save_end; 239 240 struct _IO_marker *_markers; 241 242 struct _IO_FILE *_chain; 243 244 int _fileno; 245 246 247 : 248 249 int _flags2; 250 251 __off_t _old_offset; 252 253 254 255 unsigned short _cur_column; 256 signed char _vtable_offset; 257 char _shortbuf[1]; 258 259 260 261 _IO_lock_t *_lock; 262 # 321 "/usr/include/libio.h" 3 4 263 __off64_t _offset; 264 # 330 "/usr/include/libio.h" 3 4 265 void *__pad1; 266 void *__pad2; 267 void *__pad3; 268 void *__pad4; 269 size_t __pad5; 270 271 int _mode; 272 273 char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)]; 274 275 }; 276 277 278 typedef struct _IO_FILE _IO_FILE; 279 280 281 struct _IO_FILE_plus; 282 283 extern struct _IO_FILE_plus _IO_2_1_stdin_; 284 extern struct _IO_FILE_plus _IO_2_1_stdout_; 285 extern struct _IO_FILE_plus _IO_2_1_stderr_; 286 # 366 "/usr/include/libio.h" 3 4 287 typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes); 288 289 290 291 292 293 294 : 295 296 typedef __ssize_t __io_write_fn (void *__cookie, __const char *__buf, 297 size_t __n); 298 299 300 301 302 303 304 305 typedef int __io_seek_fn (void *__cookie, __off64_t *__pos, int __w); 306 307 308 typedef int __io_close_fn (void *__cookie); 309 # 418 "/usr/include/libio.h" 3 4 310 extern int __underflow (_IO_FILE *); 311 extern int __uflow (_IO_FILE *); 312 extern int __overflow (_IO_FILE *, int); 313 # 462 "/usr/include/libio.h" 3 4 314 extern int _IO_getc (_IO_FILE *__fp); 315 extern int _IO_putc (int __c, _IO_FILE *__fp); 316 extern int _IO_feof (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__)); 317 extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__)); 318 : 319 extern int _IO_peekc_locked (_IO_FILE *__fp); 320 321 322 323 324 325 extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); 326 extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); 327 extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); 328 # 492 "/usr/include/libio.h" 3 4 329 extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict, 330 __gnuc_va_list, int *__restrict); 331 extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict, 332 __gnuc_va_list); 333 extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t); 334 extern size_t _IO_sgetn (_IO_FILE *, void *, size_t); 335 336 extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int); 337 extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int); 338 339 : 340 extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); 341 # 76 "/usr/include/stdio.h" 2 3 4 342 343 344 345 346 typedef __gnuc_va_list va_list; 347 # 91 "/usr/include/stdio.h" 3 4 348 typedef __off_t off_t; 349 # 103 "/usr/include/stdio.h" 3 4 350 typedef __ssize_t ssize_t; 351 352 353 354 355 356 357 358 typedef _G_fpos_t fpos_t; 359 360 361 362 : 363 364 # 165 "/usr/include/stdio.h" 3 4 365 # 1 "/usr/include/i386-linux-gnu/bits/stdio_lim.h" 1 3 4 366 # 166 "/usr/include/stdio.h" 2 3 4 367 368 369 370 extern struct _IO_FILE *stdin; 371 extern struct _IO_FILE *stdout; 372 extern struct _IO_FILE *stderr; 373 374 375 376 377 378 379 380 extern int remove (__const char *__filename) __attribute__ ((__nothrow__ , __leaf__)); 381 382 extern int rename (__const char *__old, __const char *__new) __attribute__ ((__nothrow__ , __leaf__)); 383 384 385 386 387 extern int renameat (int __oldfd, __const char *__old, int __newfd, 388 __const char *__new) __attribute__ ((__nothrow__ , __leaf__)); 389 390 391 392 393 394 395 396 397 extern FILE *tmpfile (void) ; 398 # 210 "/usr/include/stdio.h" 3 4 399 extern char *tmpnam (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ; 400 401 402 403 404 405 extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ; 406 # 228 "/usr/include/stdio.h" 3 4 407 extern char *tempnam (__const char *__dir, __const char *__pfx) 408 __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__)) ; 409 410 411 412 413 414 415 416 417 extern int fclose (FILE *__stream); 418 419 420 421 422 extern int fflush (FILE *__stream); 423 424 # 253 "/usr/include/stdio.h" 3 4 425 extern int fflush_unlocked (FILE *__stream); 426 # 267 "/usr/include/stdio.h" 3 4 427 428 429 430 431 432 433 extern FILE *fopen (__const char *__restrict __filename, 434 __const char *__restrict __modes) ; 435 436 437 438 439 extern FILE *freopen (__const char *__restrict __filename, 440 __const char *__restrict __modes, 441 FILE *__restrict __stream) ; 442 # 296 "/usr/include/stdio.h" 3 4 443 444 # 307 "/usr/include/stdio.h" 3 4 445 extern FILE *fdopen (int __fd, __const char *__modes) __attribute__ ((__nothrow__ , __leaf__)) ; 446 # 320 "/usr/include/stdio.h" 3 4 447 extern FILE *fmemopen (void *__s, size_t __len, __const char *__modes) 448 __attribute__ ((__nothrow__ , __leaf__)) ; 449 450 451 452 453 extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __attribute__ ((__nothrow__ , __leaf__)) ; 454 455 456 457 458 459 460 extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__ , __leaf__)); 461 462 463 464 extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, 465 int __modes, size_t __n) __attribute__ ((__nothrow__ , __leaf__)); 466 467 468 469 470 471 extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, 472 size_t __size) __attribute__ ((__nothrow__ , __leaf__)); 473 474 475 extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); 476 477 478 479 480 481 482 483 484 extern int fprintf (FILE *__restrict __stream, 485 __const char *__restrict __format, ...); 486 487 488 489 490 extern int printf (__const char *__restrict __format, ...); 491 492 extern int sprintf (char *__restrict __s, 493 __const char *__restrict __format, ...) __attribute__ ((__nothrow__)); 494 495 496 497 498 499 extern int vfprintf (FILE *__restrict __s, __const char *__restrict __format, 500 __gnuc_va_list __arg); 501 502 503 504 505 extern int vprintf (__const char *__restrict __format, __gnuc_va_list __arg); 506 507 extern int vsprintf (char *__restrict __s, __const char *__restrict __format, 508 __gnuc_va_list __arg) __attribute__ ((__nothrow__)); 509 510 511 512 513 514 extern int snprintf (char *__restrict __s, size_t __maxlen, 515 __const char *__restrict __format, ...) 516 __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 4))); 517 518 extern int vsnprintf (char *__restrict __s, size_t __maxlen, 519 __const char *__restrict __format, __gnuc_va_list __arg) 520 __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 0))); 521 522 # 418 "/usr/include/stdio.h" 3 4 523 extern int vdprintf (int __fd, __const char *__restrict __fmt, 524 __gnuc_va_list __arg) 525 __attribute__ ((__format__ (__printf__, 2, 0))); 526 extern int dprintf (int __fd, __const char *__restrict __fmt, ...) 527 __attribute__ ((__format__ (__printf__, 2, 3))); 528 529 530 531 532 533 534 535 536 extern int fscanf (FILE *__restrict __stream, 537 __const char *__restrict __format, ...) ; 538 539 540 541 542 extern int scanf (__const char *__restrict __format, ...) ; 543 544 extern int sscanf (__const char *__restrict __s, 545 __const char *__restrict __format, ...) __attribute__ ((__nothrow__ , __leaf__)); 546 # 449 "/usr/include/stdio.h" 3 4 547 extern int fscanf (FILE *__restrict __stream, __const char *__restrict __format, ...) __asm__ ("" "__isoc99_fscanf") 548 549 ; 550 extern int scanf (__const char *__restrict __format, ...) __asm__ ("" "__isoc99_scanf") 551 ; 552 extern int sscanf (__const char *__restrict __s, __const char *__restrict __format, ...) __asm__ ("" "__isoc99_sscanf") __attribute__ ((__nothrow__ , __leaf__)) 553 554 ; 555 # 469 "/usr/include/stdio.h" 3 4 556 557 558 559 560 561 562 563 564 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, 565 __gnuc_va_list __arg) 566 __attribute__ ((__format__ (__scanf__, 2, 0))) ; 567 568 569 570 571 572 extern int vscanf (__const char *__restrict __format, __gnuc_va_list __arg) 573 __attribute__ ((__format__ (__scanf__, 1, 0))) ; 574 575 576 extern int vsscanf (__const char *__restrict __s, 577 __const char *__restrict __format, __gnuc_va_list __arg) 578 __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__format__ (__scanf__, 2, 0))); 579 # 500 "/usr/include/stdio.h" 3 4 580 extern int vfscanf (FILE *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vfscanf") 581 582 583 584 __attribute__ ((__format__ (__scanf__, 2, 0))) ; 585 extern int vscanf (__const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vscanf") 586 587 __attribute__ ((__format__ (__scanf__, 1, 0))) ; 588 extern int vsscanf (__const char *__restrict __s, __const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vsscanf") __attribute__ ((__nothrow__ , __leaf__)) 589 590 591 592 __attribute__ ((__format__ (__scanf__, 2, 0))); 593 # 528 "/usr/include/stdio.h" 3 4 594 595 596 597 598 599 600 601 602 603 extern int fgetc (FILE *__stream); 604 extern int getc (FILE *__stream); 605 606 607 608 609 610 extern int getchar (void); 611 612 # 556 "/usr/include/stdio.h" 3 4 613 extern int getc_unlocked (FILE *__stream); 614 extern int getchar_unlocked (void); 615 # 567 "/usr/include/stdio.h" 3 4 616 extern int fgetc_unlocked (FILE *__stream); 617 618 619 620 621 622 623 624 625 626 627 628 extern int fputc (int __c, FILE *__stream); 629 extern int putc (int __c, FILE *__stream); 630 631 632 633 634 635 extern int putchar (int __c); 636 637 # 600 "/usr/include/stdio.h" 3 4 638 extern int fputc_unlocked (int __c, FILE *__stream); 639 640 641 642 643 644 645 646 extern int putc_unlocked (int __c, FILE *__stream); 647 extern int putchar_unlocked (int __c); 648 649 650 651 652 653 654 extern int getw (FILE *__stream); 655 656 657 extern int putw (int __w, FILE *__stream); 658 659 660 661 662 663 664 665 666 extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) 667 ; 668 669 670 671 672 673 674 extern char *gets (char *__s) ; 675 676 # 662 "/usr/include/stdio.h" 3 4 677 extern __ssize_t __getdelim (char **__restrict __lineptr, 678 size_t *__restrict __n, int __delimiter, 679 FILE *__restrict __stream) ; 680 extern __ssize_t getdelim (char **__restrict __lineptr, 681 size_t *__restrict __n, int __delimiter, 682 FILE *__restrict __stream) ; 683 684 685 686 687 688 689 690 extern __ssize_t getline (char **__restrict __lineptr, 691 size_t *__restrict __n, 692 FILE *__restrict __stream) ; 693 694 695 696 697 698 699 700 701 extern int fputs (__const char *__restrict __s, FILE *__restrict __stream); 702 703 704 705 706 707 extern int puts (__const char *__s); 708 709 710 711 712 713 714 extern int ungetc (int __c, FILE *__stream); 715 716 717 718 719 720 721 extern size_t fread (void *__restrict __ptr, size_t __size, 722 size_t __n, FILE *__restrict __stream) ; 723 724 725 726 727 extern size_t fwrite (__const void *__restrict __ptr, size_t __size, 728 size_t __n, FILE *__restrict __s); 729 730 # 734 "/usr/include/stdio.h" 3 4 731 extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, 732 size_t __n, FILE *__restrict __stream) ; 733 extern size_t fwrite_unlocked (__const void *__restrict __ptr, size_t __size, 734 size_t __n, FILE *__restrict __stream); 735 736 737 738 739 740 741 742 743 extern int fseek (FILE *__stream, long int __off, int __whence); 744 745 746 747 748 extern long int ftell (FILE *__stream) ; 749 750 751 752 753 extern void rewind (FILE *__stream); 754 755 # 770 "/usr/include/stdio.h" 3 4 756 extern int fseeko (FILE *__stream, __off_t __off, int __whence); 757 758 759 760 761 extern __off_t ftello (FILE *__stream) ; 762 # 789 "/usr/include/stdio.h" 3 4 763 764 765 766 767 768 769 extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); 770 771 772 773 774 extern int fsetpos (FILE *__stream, __const fpos_t *__pos); 775 # 812 "/usr/include/stdio.h" 3 4 776 777 # 821 "/usr/include/stdio.h" 3 4 778 779 780 extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); 781 782 extern int feof (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 783 784 extern int ferror (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 785 786 787 788 789 extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); 790 extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 791 extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 792 793 794 795 796 797 798 799 800 extern void perror (__const char *__s); 801 802 803 804 805 806 807 # 1 "/usr/include/i386-linux-gnu/bits/sys_errlist.h" 1 3 4 808 # 27 "/usr/include/i386-linux-gnu/bits/sys_errlist.h" 3 4 809 extern int sys_nerr; 810 extern __const char *__const sys_errlist[]; 811 # 851 "/usr/include/stdio.h" 2 3 4 812 813 814 815 816 extern int fileno (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 817 818 819 820 821 extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 822 # 870 "/usr/include/stdio.h" 3 4 823 extern FILE *popen (__const char *__command, __const char *__modes) ; 824 825 826 827 828 829 extern int pclose (FILE *__stream); 830 831 832 833 834 835 extern char *ctermid (char *__s) __attribute__ ((__nothrow__ , __leaf__)); 836 # 910 "/usr/include/stdio.h" 3 4 837 extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); 838 839 840 841 extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; 842 843 844 extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); 845 # 940 "/usr/include/stdio.h" 3 4 846 847 # 2 "name.c" 2 848 int main(int argc, const char *argv[]) 849 { 850 printf("Hello World\n"); 851 return 0; 852 }
编译：把c语言变成汇编语言gcc -S name.i -o name.s
name.s文件如下
1 .file "name.c" 2 .section .rodata 3 .LC0: 4 .string "Hello World" 5 .text 6 .globl main 7 .type main, @function 8 main: 9 .LFB0: 10 .cfi_startproc 11 pushl %ebp 12 .cfi_def_cfa_offset 8 13 .cfi_offset 5, -8 14 movl %esp, %ebp 15 .cfi_def_cfa_register 5 16 andl $-16, %esp 17 subl $16, %esp 18 movl $.LC0, (%esp) 19 call puts 20 movl $0, %eax 21 leave 22 .cfi_restore 5 23 .cfi_def_cfa 4, 4 24 ret 25 .cfi_endproc 26 .LFE0: 27 .size main, .-main 28 .ident "GCC: (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3" 29 .section .note.GNU-stack,"",@progbits
汇编：把汇编语言变成机器语言gcc -c name.s -o name.o
链接：把所有有关的库函数和汇编生成的目标文件链接成可执行的文件gcc name.o -o name
然后执行./name就可以了
还可以用内部的编译器自己做
如下：
cpp name.c -o name.i
/usr/lib/gcc/i686-linux-gnu/cc1 name.i -o name.s
as name.s -o name.o
ld --dynamic-linker /lib/ld-linux.so.2 /usr/lib/i386-linux-gnu/crt1.o /usr/lib/i386-linux-gnu/crti.o /usr/lib/gcc/i686-linux-gnu/4.6/crtbegin.o -lc /usr/lib/gcc/i686-linux-gnu/4.6/crtend.o /usr/lib/i386-linux-gnu/crtn.o name.o