préprocesseur pour nettoyer code

Bonjour à tous,

J'ai trouvé ceci:
http://www.cs.tut.fi/~jkorpela/html/cpre.html

Je l'ai utilisé pour enlever les commentaires d'un code à soumettre mais gcc me met des dizaines de lignes de t plus:
gcc -E -x c -P -o out.txt ttt.c

[CODE]typedef unsigned int size_t;
typedef short unsigned int wchar_t;
void* __attribute__((__cdecl__)) __attribute__ ((__nothrow__)) memchr (const void*, int, size_t) __attribute__ ((__pure__));
etc.
CODE]

Y a-t-il de la documentation simple là-dessus?

Code:

---

1 2 3 4 5 6

man gcc [...] -E Stop after the preprocessing stage; do not run the compiler proper. The output is in the form of preprocessed source code, which is sent to the standard output. [...]

---

Code:

---

--target-help Display target specific command line options

---

gcc --E-help
gcc: no input files

ne fonctionne pas.

Comme le dit le message de Matafan, l'option -E de gcc n'effectue que la phase de "preprocessing" (travail du préprocesseur). Sur la sortie standard, tu obtiendras ce qui est réellement en entrée du compilateur. Par contre, l'option -E ne s'utilise pas avec l'option -o qui permet de spécifier le nom de l'exécutable en sortie.

Après passage dans le préprocesseur, tes commentaires disparaitront mais les "lignes en plus" que tu vois ne sont que l'exploitation (l' "expansion") de tous les #include qui se trouvent dans ton source, des macros, etc...

Fais l'expérience sur le fichier "rien.c" suivant :

Code:

---

1 2 3 4 5 6

#include <stdio.h> int main(int argc,char *argv[]) { exit(0); }

---

en tapant "gcc -E rien.c"

et tu obtiendras, sur la sortie standard, un tas de lignes, essentiellement le contenu de stdio.h (résultat sous Ubuntu):

Code:

---

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753

# 1 "rien.c" # 1 "<interne>" # 1 "<command-line>" # 1 "rien.c" # 1 "/usr/include/stdio.h" 1 3 4 # 28 "/usr/include/stdio.h" 3 4 # 1 "/usr/include/features.h" 1 3 4 # 330 "/usr/include/features.h" 3 4 # 1 "/usr/include/sys/cdefs.h" 1 3 4 # 348 "/usr/include/sys/cdefs.h" 3 4 # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 349 "/usr/include/sys/cdefs.h" 2 3 4 # 331 "/usr/include/features.h" 2 3 4 # 354 "/usr/include/features.h" 3 4 # 1 "/usr/include/gnu/stubs.h" 1 3 4       # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 5 "/usr/include/gnu/stubs.h" 2 3 4     # 1 "/usr/include/gnu/stubs-32.h" 1 3 4 # 8 "/usr/include/gnu/stubs.h" 2 3 4 # 355 "/usr/include/features.h" 2 3 4 # 29 "/usr/include/stdio.h" 2 3 4           # 1 "/usr/lib/gcc/i486-linux-gnu/4.3.2/include/stddef.h" 1 3 4 # 214 "/usr/lib/gcc/i486-linux-gnu/4.3.2/include/stddef.h" 3 4 typedef unsigned int size_t; # 35 "/usr/include/stdio.h" 2 3 4   # 1 "/usr/include/bits/types.h" 1 3 4 # 28 "/usr/include/bits/types.h" 3 4 # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 29 "/usr/include/bits/types.h" 2 3 4     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;         __extension__ typedef signed long long int __int64_t; __extension__ typedef unsigned long long int __uint64_t;               __extension__ typedef long long int __quad_t; __extension__ typedef unsigned long long int __u_quad_t; # 131 "/usr/include/bits/types.h" 3 4 # 1 "/usr/include/bits/typesizes.h" 1 3 4 # 132 "/usr/include/bits/types.h" 2 3 4     __extension__ typedef __u_quad_t __dev_t; __extension__ typedef unsigned int __uid_t; __extension__ typedef unsigned int __gid_t; __extension__ typedef unsigned long int __ino_t; __extension__ typedef __u_quad_t __ino64_t; __extension__ typedef unsigned int __mode_t; __extension__ typedef unsigned int __nlink_t; __extension__ typedef long int __off_t; __extension__ typedef __quad_t __off64_t; __extension__ typedef int __pid_t; __extension__ typedef struct { int __val[2]; } __fsid_t; __extension__ typedef long int __clock_t; __extension__ typedef unsigned long int __rlim_t; __extension__ typedef __u_quad_t __rlim64_t; __extension__ typedef unsigned int __id_t; __extension__ typedef long int __time_t; __extension__ typedef unsigned int __useconds_t; __extension__ typedef long int __suseconds_t;   __extension__ typedef int __daddr_t; __extension__ typedef long int __swblk_t; __extension__ typedef int __key_t;     __extension__ typedef int __clockid_t;     __extension__ typedef void * __timer_t;     __extension__ typedef long int __blksize_t;         __extension__ typedef long int __blkcnt_t; __extension__ typedef __quad_t __blkcnt64_t;     __extension__ typedef unsigned long int __fsblkcnt_t; __extension__ typedef __u_quad_t __fsblkcnt64_t;     __extension__ typedef unsigned long int __fsfilcnt_t; __extension__ typedef __u_quad_t __fsfilcnt64_t;   __extension__ typedef int __ssize_t;       typedef __off64_t __loff_t; typedef __quad_t *__qaddr_t; typedef char *__caddr_t;     __extension__ typedef int __intptr_t;     __extension__ typedef unsigned int __socklen_t; # 37 "/usr/include/stdio.h" 2 3 4 # 45 "/usr/include/stdio.h" 3 4 struct _IO_FILE;       typedef struct _IO_FILE FILE;           # 65 "/usr/include/stdio.h" 3 4 typedef struct _IO_FILE __FILE; # 75 "/usr/include/stdio.h" 3 4 # 1 "/usr/include/libio.h" 1 3 4 # 32 "/usr/include/libio.h" 3 4 # 1 "/usr/include/_G_config.h" 1 3 4 # 15 "/usr/include/_G_config.h" 3 4 # 1 "/usr/lib/gcc/i486-linux-gnu/4.3.2/include/stddef.h" 1 3 4 # 16 "/usr/include/_G_config.h" 2 3 4         # 1 "/usr/include/wchar.h" 1 3 4 # 78 "/usr/include/wchar.h" 3 4 typedef struct { int __count; union {   unsigned int __wch;       char __wchb[4]; } __value; } __mbstate_t; # 21 "/usr/include/_G_config.h" 2 3 4   typedef struct { __off_t __pos; __mbstate_t __state; } _G_fpos_t; typedef struct { __off64_t __pos; __mbstate_t __state; } _G_fpos64_t; # 53 "/usr/include/_G_config.h" 3 4 typedef int _G_int16_t __attribute__ ((__mode__ (__HI__))); typedef int _G_int32_t __attribute__ ((__mode__ (__SI__))); typedef unsigned int _G_uint16_t __attribute__ ((__mode__ (__HI__))); typedef unsigned int _G_uint32_t __attribute__ ((__mode__ (__SI__))); # 33 "/usr/include/libio.h" 2 3 4 # 53 "/usr/include/libio.h" 3 4 # 1 "/usr/lib/gcc/i486-linux-gnu/4.3.2/include/stdarg.h" 1 3 4 # 43 "/usr/lib/gcc/i486-linux-gnu/4.3.2/include/stdarg.h" 3 4 typedef __builtin_va_list __gnuc_va_list; # 54 "/usr/include/libio.h" 2 3 4 # 170 "/usr/include/libio.h" 3 4 struct _IO_jump_t; struct _IO_FILE; # 180 "/usr/include/libio.h" 3 4 typedef void _IO_lock_t;           struct _IO_marker { struct _IO_marker *_next; struct _IO_FILE *_sbuf;       int _pos; # 203 "/usr/include/libio.h" 3 4 };     enum __codecvt_result { __codecvt_ok, __codecvt_partial, __codecvt_error, __codecvt_noconv }; # 271 "/usr/include/libio.h" 3 4 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[1];       _IO_lock_t *_lock; # 319 "/usr/include/libio.h" 3 4 __off64_t _offset; # 328 "/usr/include/libio.h" 3 4 void *__pad1; void *__pad2; void *__pad3; void *__pad4; size_t __pad5;   int _mode;   char _unused2[15 * sizeof (int) - 4 * 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_; # 364 "/usr/include/libio.h" 3 4 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); # 416 "/usr/include/libio.h" 3 4 extern int __underflow (_IO_FILE *); extern int __uflow (_IO_FILE *); extern int __overflow (_IO_FILE *, int); # 458 "/usr/include/libio.h" 3 4 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__)); extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__));   extern int _IO_peekc_locked (_IO_FILE *__fp);           extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__)); extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__)); extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__)); # 488 "/usr/include/libio.h" 3 4 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__)); # 76 "/usr/include/stdio.h" 2 3 4 # 89 "/usr/include/stdio.h" 3 4     typedef _G_fpos_t fpos_t;         # 141 "/usr/include/stdio.h" 3 4 # 1 "/usr/include/bits/stdio_lim.h" 1 3 4 # 142 "/usr/include/stdio.h" 2 3 4       extern struct _IO_FILE *stdin; extern struct _IO_FILE *stdout; extern struct _IO_FILE *stderr;               extern int remove (__const char *__filename) __attribute__ ((__nothrow__));   extern int rename (__const char *__old, __const char *__new) __attribute__ ((__nothrow__));                             extern FILE *tmpfile (void) ; # 186 "/usr/include/stdio.h" 3 4 extern char *tmpnam (char *__s) __attribute__ ((__nothrow__)) ;           extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__)) ; # 204 "/usr/include/stdio.h" 3 4 extern char *tempnam (__const char *__dir, __const char *__pfx) __attribute__ ((__nothrow__)) __attribute__ ((__malloc__)) ;                 extern int fclose (FILE *__stream);         extern int fflush (FILE *__stream);   # 229 "/usr/include/stdio.h" 3 4 extern int fflush_unlocked (FILE *__stream); # 243 "/usr/include/stdio.h" 3 4             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) ; # 272 "/usr/include/stdio.h" 3 4   # 283 "/usr/include/stdio.h" 3 4 extern FILE *fdopen (int __fd, __const char *__modes) __attribute__ ((__nothrow__)) ; # 304 "/usr/include/stdio.h" 3 4       extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__));       extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, int __modes, size_t __n) __attribute__ ((__nothrow__));           extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, size_t __size) __attribute__ ((__nothrow__));     extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__));                 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__, 3, 4)));   extern int vsnprintf (char *__restrict __s, size_t __maxlen, __const char *__restrict __format, __gnuc_va_list __arg) __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 0)));   # 398 "/usr/include/stdio.h" 3 4           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__)); # 441 "/usr/include/stdio.h" 3 4   # 504 "/usr/include/stdio.h" 3 4           extern int fgetc (FILE *__stream); extern int getc (FILE *__stream);           extern int getchar (void);   # 528 "/usr/include/stdio.h" 3 4 extern int getc_unlocked (FILE *__stream); extern int getchar_unlocked (void); # 539 "/usr/include/stdio.h" 3 4 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);   # 572 "/usr/include/stdio.h" 3 4 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) ;             extern char *gets (char *__s) ;   # 653 "/usr/include/stdio.h" 3 4           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) ;   # 706 "/usr/include/stdio.h" 3 4 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);   # 742 "/usr/include/stdio.h" 3 4 extern int fseeko (FILE *__stream, __off_t __off, int __whence);         extern __off_t ftello (FILE *__stream) ; # 761 "/usr/include/stdio.h" 3 4             extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);         extern int fsetpos (FILE *__stream, __const fpos_t *__pos); # 784 "/usr/include/stdio.h" 3 4   # 793 "/usr/include/stdio.h" 3 4     extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__));   extern int feof (FILE *__stream) __attribute__ ((__nothrow__)) ;   extern int ferror (FILE *__stream) __attribute__ ((__nothrow__)) ;         extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__)); extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__)) ; extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__)) ;                 extern void perror (__const char *__s);             # 1 "/usr/include/bits/sys_errlist.h" 1 3 4 # 27 "/usr/include/bits/sys_errlist.h" 3 4 extern int sys_nerr; extern __const char *__const sys_errlist[]; # 823 "/usr/include/stdio.h" 2 3 4         extern int fileno (FILE *__stream) __attribute__ ((__nothrow__)) ;         extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__)) ; # 842 "/usr/include/stdio.h" 3 4 extern FILE *popen (__const char *__command, __const char *__modes) ;           extern int pclose (FILE *__stream);           extern char *ctermid (char *__s) __attribute__ ((__nothrow__)); # 882 "/usr/include/stdio.h" 3 4 extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__));       extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__)) ;     extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__)); # 912 "/usr/include/stdio.h" 3 4   # 2 "rien.c" 2 int main(int argc,char *argv[]) { exit(0); }

---

Si dans ton code, tu utilises des include qui ne sont pas situés dans le répertoire standard (/usr/include), il faut utiliser l'option -I de gcc, comme si tu compilais réellement ton source pour en faire un exécutable.

Et, pour en revenir à ton premier soucis, celui d'enlever les commentaires, l'utilisation du préprocesseur n'est pas la solution !

Merci à vous deux,

Comme je n'ai pas envie de chercher, je suis en train de me créer ma ptit appplication en ce sens.

:ccool:

JPD