src/gmxlib/gmx_fatal.c

   1 /* -*- mode: c; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; c-file-style: "stroustrup"; -*-
   2  *
   3  *
   4  *                This source code is part of
   5  *
   6  *                 G   R   O   M   A   C   S
   7  *
   8  *          GROningen MAchine for Chemical Simulations
   9  *
  10  *                        VERSION 3.2.0
  11  * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
  12  * Copyright (c) 1991-2000, University of Groningen, The Netherlands.
  13  * Copyright (c) 2001-2004, The GROMACS development team,
  14  * check out http://www.gromacs.org for more information.
  15
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License
  18  * as published by the Free Software Foundation; either version 2
  19  * of the License, or (at your option) any later version.
  20  *
  21  * If you want to redistribute modifications, please consider that
  22  * scientific software is very special. Version control is crucial -
  23  * bugs must be traceable. We will be happy to consider code for
  24  * inclusion in the official distribution, but derived work must not
  25  * be called official GROMACS. Details are found in the README & COPYING
  26  * files - if they are missing, get the official version at www.gromacs.org.
  27  *
  28  * To help us fund GROMACS development, we humbly ask that you cite
  29  * the papers on the package - you can find them in the top README file.
  30  *
  31  * For more info, check our website at http://www.gromacs.org
  32  *
  33  * And Hey:
  34  * GROningen Mixture of Alchemy and Childrens' Stories
  35  */
  36 #ifdef HAVE_CONFIG_H
  37 #include <config.h>
  38 #endif
  39
  40 #include <sysstuff.h>
  41 #include <ctype.h>
  42 #include <errno.h>
  43 #include <stdarg.h>
  44 #include <string.h>
  45 #include "futil.h"
  46 #include "statutil.h"
  47 #include "main.h"
  48 #include "network.h"
  49 #include "gmx_fatal.h"
  50 #include "copyrite.h"
  51 #include "macros.h"
  52 #include "string2.h"
  53 #include "smalloc.h"
  54 #include "gmxfio.h"
  55
  56 #ifdef GMX_LIB_MPI
  57 #include <mpi.h>
  58 #endif
  59 #ifdef GMX_THREADS
  60 #include "tmpi.h"
  61 #endif
  62
  63 static gmx_bool bDebug = FALSE;
  64 static char *fatal_tmp_file = NULL;
  65 static FILE *log_file = NULL;
  66
  67 #ifdef GMX_THREADS
  68 static tMPI_Thread_mutex_t debug_mutex=TMPI_THREAD_MUTEX_INITIALIZER;
  69 static tMPI_Thread_mutex_t where_mutex=TMPI_THREAD_MUTEX_INITIALIZER;
  70 static tMPI_Thread_mutex_t fatal_tmp_mutex=TMPI_THREAD_MUTEX_INITIALIZER;
  71 #endif
  72
  73
  74 gmx_bool bDebugMode(void)
  75 {
  76     gmx_bool ret;
  77 /*#ifdef GMX_THREADS*/
  78 #if 0
  79     tMPI_Thread_mutex_lock(&debug_mutex);
  80 #endif
  81     ret=bDebug;
  82 /*#ifdef GMX_THREADS*/
  83 #if 0
  84     tMPI_Thread_mutex_unlock(&debug_mutex);
  85 #endif
  86     return bDebug;
  87 }
  88
  89 void gmx_fatal_set_log_file(FILE *fp)
  90 {
  91   log_file = fp;
  92 }
  93
  94 void _where(const char *file,int line)
  95 {
  96   static gmx_bool bFirst = TRUE;
  97   static int  nskip  = -1;
  98   static int  nwhere =  0;
  99   FILE *fp;
 100   char *temp;
 101
 102   if ( bFirst ) {
 103 #ifdef GMX_THREADS
 104     tMPI_Thread_mutex_lock(&where_mutex);
 105     if (bFirst) /* we repeat the check in the locked section because things
 106                    might have changed */
 107     {
 108 #endif
 109         if ((temp=getenv("WHERE")) != NULL)
 110             nskip = strtol(temp, NULL, 10);
 111         bFirst = FALSE;
 112 #ifdef GMX_THREADS
 113     }
 114     tMPI_Thread_mutex_unlock(&where_mutex);
 115 #endif
 116
 117   }
 118
 119   if (nskip >= 0) {
 120     /* Skip the first n occasions, this allows to see where it goes wrong */
 121     if (nwhere >= nskip) {
 122       if (log_file)
 123         fp = log_file;
 124       else
 125         fp = stderr;
 126       fprintf(fp,"WHERE %d, file %s - line %d\n",nwhere,file,line);
 127     }
 128     nwhere++;
 129   }
 130 }
 131
 132 static void bputc(char *msg,int *len,char ch)
 133 {
 134   msg[(*len)++]=ch;
 135 }
 136
 137 static void bputs(char *msg,int *len,const char *s,int fld)
 138 {
 139   for (fld-=(int)strlen(s); fld>0; fld--)
 140     bputc(msg,len,' ');
 141   while (*s)
 142     bputc(msg,len,*(s++));
 143 }
 144
 145 static void bputd(char *msg,int *len,int d)
 146 {
 147   if (d<10) bputc(msg,len,d+'0'); else bputc(msg,len,d-10+'a');
 148 }
 149
 150 static void bputi(char *msg,int *len,int val,int radix,int fld,gmx_bool bNeg)
 151 {
 152   int fmax=0;
 153
 154   if (bNeg)
 155     fmax=1;
 156
 157   if (val<radix)
 158     {
 159       for (fld--; fld>fmax; fld--)
 160         bputc(msg,len,' ');
 161       if (bNeg)
 162         bputc(msg,len,'-');
 163       bputd(msg,len,val);
 164     }
 165   else
 166     {
 167       if (bNeg)
 168         bputc(msg,len,'-');
 169       bputi(msg,len,val/radix,radix,fld-1,FALSE);
 170       bputd(msg,len,val%radix);
 171     }
 172 }
 173
 174 static int getfld(const char **p)
 175 {
 176   int fld;
 177
 178   fld=0;
 179   while (isdigit(**p)) fld=(fld*10)+((*((*p)++))-'0');
 180   return fld;
 181 }
 182
 183 /*static void _halt(char *file,int line,char *reason)
 184 {
 185   fprintf(stderr,"\nHALT in file %s line %d because:\n\t%s\n",
 186           file,line,reason);
 187   exit(1);
 188 }
 189 */
 190
 191 static int fatal_errno = 0;
 192
 193 static void quit_gmx(const char *msg)
 194 {
 195 #ifdef GMX_THREADS
 196     tMPI_Thread_mutex_lock(&debug_mutex);
 197 #endif
 198     if (fatal_errno == 0)
 199     {
 200         if (log_file)
 201         {
 202             fprintf(log_file,"%s\n",msg);
 203         }
 204         fprintf(stderr,"%s\n",msg);
 205         /* we set it to no-zero because if this function is called, something
 206            has gone wrong */
 207         fatal_errno=255;
 208     }
 209     else
 210     {
 211         if (fatal_errno != -1)
 212         {
 213             errno=fatal_errno;
 214         }
 215         perror(msg);
 216     }
 217
 218 #ifndef GMX_THREADS
 219     if (gmx_parallel_env_initialized())
 220     {
 221         int  nnodes;
 222         int  noderank;
 223
 224         nnodes   = gmx_node_num();
 225         noderank = gmx_node_rank();
 226
 227         if (nnodes > 1)
 228             fprintf(stderr,"Error on node %d, will try to stop all the nodes\n",
 229                     noderank);
 230         gmx_abort(noderank,nnodes,-1);
 231     }
 232     else
 233 #endif
 234     {
 235         if (debug)
 236             fflush(debug);
 237         if (bDebugMode()) {
 238             fprintf(stderr,"dump core (y/n):");
 239             fflush(stderr);
 240             if (toupper(getc(stdin))!='N')
 241                 (void) abort();
 242         }
 243     }
 244
 245     exit(fatal_errno);
 246 #ifdef GMX_THREADS
 247     tMPI_Thread_mutex_unlock(&debug_mutex);
 248 #endif
 249 }
 250
 251 /* The function below should be identical to quit_gmx,
 252  * except that is does not actually quit and call gmx_abort.
 253  */
 254 static void quit_gmx_noquit(const char *msg)
 255 {
 256 #ifdef GMX_THREADS
 257     tMPI_Thread_mutex_lock(&debug_mutex);
 258 #endif
 259     if (!fatal_errno)
 260     {
 261         if (log_file)
 262             fprintf(log_file,"%s\n",msg);
 263         fprintf(stderr,"%s\n",msg);
 264         /* we set it to no-zero because if this function is called, something
 265            has gone wrong */
 266         fatal_errno=255;
 267     }
 268     else
 269     {
 270         if (fatal_errno != -1)
 271             errno=fatal_errno;
 272         perror(msg);
 273     }
 274
 275     if (!gmx_parallel_env_initialized())
 276     {
 277         if (debug)
 278             fflush(debug);
 279         if (bDebugMode()) {
 280             fprintf(stderr,"dump core (y/n):");
 281             fflush(stderr);
 282             if (toupper(getc(stdin))!='N')
 283                 (void) abort();
 284         }
 285     }
 286
 287 #ifdef GMX_THREADS
 288     tMPI_Thread_mutex_unlock(&debug_mutex);
 289 #endif
 290 }
 291
 292 void _set_fatal_tmp_file(const char *fn, const char *file, int line)
 293 {
 294 #ifdef GMX_THREADS
 295     tMPI_Thread_mutex_lock(&fatal_tmp_mutex);
 296 #endif
 297   if (fatal_tmp_file == NULL)
 298     fatal_tmp_file = strdup(fn);
 299   else
 300     fprintf(stderr,"BUGWARNING: fatal_tmp_file already set at %s:%d",
 301             file,line);
 302 #ifdef GMX_THREADS
 303     tMPI_Thread_mutex_unlock(&fatal_tmp_mutex);
 304 #endif
 305 }
 306
 307 void _unset_fatal_tmp_file(const char *fn, const char *file, int line)
 308 {
 309 #ifdef GMX_THREADS
 310     tMPI_Thread_mutex_lock(&fatal_tmp_mutex);
 311 #endif
 312   if (strcmp(fn,fatal_tmp_file) == 0) {
 313     sfree(fatal_tmp_file);
 314     fatal_tmp_file = NULL;
 315   } else
 316     fprintf(stderr,"BUGWARNING: file %s not set as fatal_tmp_file at %s:%d",
 317             fn,file,line);
 318 #ifdef GMX_THREADS
 319     tMPI_Thread_mutex_unlock(&fatal_tmp_mutex);
 320 #endif
 321 }
 322
 323 static void clean_fatal_tmp_file()
 324 {
 325 #ifdef GMX_THREADS
 326     tMPI_Thread_mutex_lock(&fatal_tmp_mutex);
 327 #endif
 328   if (fatal_tmp_file) {
 329     fprintf(stderr,"Cleaning up temporary file %s\n",fatal_tmp_file);
 330     remove(fatal_tmp_file);
 331     sfree(fatal_tmp_file);
 332     fatal_tmp_file = NULL;
 333   }
 334 #ifdef GMX_THREADS
 335     tMPI_Thread_mutex_unlock(&fatal_tmp_mutex);
 336 #endif
 337 }
 338
 339 static void parse_printf_args(const char *fmt,va_list *ap,char *msg)
 340 {
 341     int     len;
 342     const char *p;
 343     char    cval,*sval;
 344     char    ibuf[64],ifmt[64];
 345     int     index,ival,fld;
 346     double  dval;
 347
 348     len = 0;
 349     for(p=fmt; *p; p++)
 350     {
 351         if (*p!='%')
 352         {
 353             bputc(msg,&len,*p);
 354         }
 355         else
 356         {
 357             p++;
 358             fld = getfld(&p);
 359             switch(*p) {
 360             case 'x':
 361                 ival = va_arg(*ap,int);
 362                 sprintf(ifmt,"0x%%%dx",fld);
 363                 sprintf(ibuf,ifmt,(unsigned int)ival);
 364                 for(index=0; (index<(int)strlen(ibuf)); index++)
 365                     bputc(msg,&len,ibuf[index]);
 366                 break;
 367             case 'd':
 368                 ival = va_arg(*ap,int);
 369                 sprintf(ifmt,"%%%dd",fld);
 370                 sprintf(ibuf,ifmt,ival);
 371                 for(index=0; (index<(int)strlen(ibuf)); index++)
 372                     bputc(msg,&len,ibuf[index]);
 373                 break;
 374             case 'u':
 375                 ival = va_arg(*ap,unsigned);
 376                 sprintf(ifmt,"%%%du",fld);
 377                 sprintf(ibuf,ifmt,ival);
 378                 for(index=0; (index<(int)strlen(ibuf)); index++)
 379                     bputc(msg,&len,ibuf[index]);
 380                 break;
 381             case 'f':
 382                 dval = va_arg(*ap,double);
 383                 sprintf(ifmt,"%%%df",fld);
 384                 sprintf(ibuf,ifmt,dval);
 385                 for(index=0; (index<(int)strlen(ibuf)); index++)
 386                     bputc(msg,&len,ibuf[index]);
 387                 break;
 388             case 'g':
 389                 dval = va_arg(*ap,double);
 390                 sprintf(ifmt,"%%%dg",fld);
 391                 sprintf(ibuf,ifmt,dval);
 392                 for(index=0; (index<(int)strlen(ibuf)); index++)
 393                     bputc(msg,&len,ibuf[index]);
 394                 break;
 395             case 'c':
 396                 cval = (char) va_arg(*ap,int); /* char is promoted to int */
 397                 bputc(msg,&len,cval);
 398                 break;
 399             case 's':
 400                 sval = va_arg(*ap,char *);
 401                 if (sval == NULL)
 402                     sval = strdup("(null)");
 403                 bputs(msg,&len,sval,fld);
 404                 break;
 405             case '%':
 406                 bputc(msg,&len,*p);
 407                 break;
 408             default:
 409                 break;
 410             }
 411         }
 412     }
 413
 414     bputc(msg,&len,'\0');
 415 }
 416
 417 void gmx_fatal(int f_errno,const char *file,int line,const char *fmt,...)
 418 {
 419   va_list ap;
 420   char    msg[STRLEN];
 421
 422   va_start(ap,fmt);
 423
 424   clean_fatal_tmp_file();
 425
 426   parse_printf_args(fmt,&ap,msg);
 427
 428   va_end(ap);
 429
 430 #ifdef GMX_THREADS
 431   tMPI_Thread_mutex_lock(&debug_mutex);
 432 #endif
 433
 434   fatal_errno = f_errno;
 435
 436 #ifdef GMX_THREADS
 437   tMPI_Thread_mutex_unlock(&debug_mutex);
 438 #endif
 439
 440   _gmx_error("fatal",msg,file,line);
 441 }
 442
 443 void gmx_fatal_collective(int f_errno,const char *file,int line,
 444                           t_commrec *cr,gmx_domdec_t *dd,
 445                           const char *fmt,...)
 446 {
 447     gmx_bool    bFinalize;
 448     va_list ap;
 449     char    msg[STRLEN];
 450 #ifdef GMX_MPI
 451     int     result;
 452 #endif
 453
 454     bFinalize = TRUE;
 455
 456 #ifdef GMX_MPI
 457     if (gmx_parallel_env_initialized())
 458     {
 459         /* Check if we are calling on all processes in MPI_COMM_WORLD */
 460         if (cr != NULL)
 461         {
 462             MPI_Comm_compare(cr->mpi_comm_mysim,MPI_COMM_WORLD,&result);
 463         }
 464         else
 465         {
 466             MPI_Comm_compare(dd->mpi_comm_all,MPI_COMM_WORLD,&result);
 467         }
 468         /* Any result except MPI_UNEQUAL allows us to call MPI_Finalize */
 469         bFinalize = (result != MPI_UNEQUAL);
 470     }
 471 #endif
 472
 473     if ((cr != NULL && MASTER(cr)  ) ||
 474         (dd != NULL && DDMASTER(dd)))
 475     {
 476         va_start(ap,fmt);
 477
 478         clean_fatal_tmp_file();
 479
 480         parse_printf_args(fmt,&ap,msg);
 481
 482         va_end(ap);
 483
 484 #ifdef GMX_THREADS
 485         tMPI_Thread_mutex_lock(&debug_mutex);
 486 #endif
 487
 488         fatal_errno = f_errno;
 489
 490 #ifdef GMX_THREADS
 491         tMPI_Thread_mutex_unlock(&debug_mutex);
 492 #endif
 493
 494         if (bFinalize)
 495         {
 496             /* Use an error handler that does not quit */
 497             set_gmx_error_handler(quit_gmx_noquit);
 498         }
 499
 500         _gmx_error("fatal",msg,file,line);
 501     }
 502
 503 #ifdef GMX_MPI
 504     if (gmx_parallel_env_initialized())
 505     {
 506         if (bFinalize)
 507         {
 508             /* Broadcast the fatal error number possibly modified
 509              * on the master process, in case the user would like
 510              * to use the return status on a non-master process.
 511              * The master process in cr and dd always has global rank 0.
 512              */
 513             MPI_Bcast(&fatal_errno,sizeof(fatal_errno),MPI_BYTE,
 514                       0,MPI_COMM_WORLD);
 515
 516             /* Finalize nicely instead of aborting */
 517             MPI_Finalize();
 518         }
 519         else
 520         {
 521             /* Let all other processes wait till the master has printed
 522              * the error message and issued MPI_Abort.
 523              */
 524             MPI_Barrier(MPI_COMM_WORLD);
 525         }
 526     }
 527 #endif
 528
 529     exit(fatal_errno);
 530 }
 531
 532 void _invalid_case(const char *fn,int line)
 533 {
 534   gmx_fatal(FARGS,"Invalid case in switch statement, file %s, line %d",
 535               fn,line);
 536 }
 537
 538 void _unexpected_eof(const char *fn,int line,const char *srcfn,int srcline)
 539 {
 540   gmx_fatal(FARGS,"Unexpected end of file in file %s at line %d\n"
 541               "(Source file %s, line %d)",fn,line,srcfn,srcline);
 542 }
 543
 544 /*
 545  * These files are global variables in the gromacs preprocessor
 546  * Every routine in a file that includes gmx_fatal.h can write to these
 547  * debug channels. Depending on the debuglevel used
 548  * 0 to 3 of these filed are redirected to /dev/null
 549  *
 550  */
 551 FILE *debug=NULL;
 552 gmx_bool gmx_debug_at=FALSE;
 553
 554 void init_debug (const int dbglevel,const char *dbgfile)
 555 {
 556 #ifdef GMX_THREADS
 557     tMPI_Thread_mutex_lock(&debug_mutex);
 558 #endif
 559     if (!bDebug) /* another thread hasn't already run this*/
 560     {
 561         no_buffers();
 562         debug=gmx_fio_fopen(dbgfile,"w+");
 563         bDebug = TRUE;
 564         if (dbglevel >= 2)
 565             gmx_debug_at = TRUE;
 566     }
 567 #ifdef GMX_THREADS
 568     tMPI_Thread_mutex_unlock(&debug_mutex);
 569 #endif
 570 }
 571
 572 #if (defined __sgi && defined USE_SGI_FPE)
 573 static void user_routine(unsigned us[5], int ii[2])
 574 {
 575   fprintf(stderr,"User routine us=(%u,%u,%u,%u,%u) ii=(%d,%d)\n",
 576           us[0],us[1],us[2],us[3],us[4],ii[0],ii[1]);
 577   fprintf(stderr,"Exception encountered! Dumping core\n");
 578   abort();
 579 }
 580
 581 static void abort_routine(unsigned int **ii)
 582 {
 583   fprintf(stderr,"Abort routine\n");
 584   abort();
 585 }
 586
 587 static void handle_signals(int n)
 588 {
 589   fprintf(stderr,"Handle signals: n = %d\n",n);
 590   fprintf(stderr,"Dumping core\n");
 591   abort();
 592 }
 593
 594 void doexceptions(void)
 595 {
 596 #include <sigfpe.h>
 597 #include <signal.h>
 598   int hs[] = { SIGILL, SIGFPE, SIGTRAP, SIGEMT, SIGSYS };
 599
 600   int onoff,en_mask,abort_action,i;
 601
 602 #ifdef GMX_THREADS
 603     tMPI_Thread_mutex_lock(&debug_mutex);
 604 #endif
 605   onoff   = _DEBUG;
 606   en_mask = _EN_UNDERFL | _EN_OVERFL | _EN_DIVZERO |
 607     _EN_INVALID | _EN_INT_OVERFL;
 608   abort_action = _ABORT_ON_ERROR;
 609   handle_sigfpes(onoff,en_mask,user_routine,abort_action,abort_routine);
 610
 611   for(i=0; (i<asize(hs)); i++)
 612     signal(hs[i],handle_signals);
 613 #ifdef GMX_THREADS
 614     tMPI_Thread_mutex_unlock(&debug_mutex);
 615 #endif
 616 }
 617 #endif /* __sgi and FPE */
 618
 619 static const char *gmxuser = "Please report this to the mailing list (gmx-users@gromacs.org)";
 620
 621 static void (*gmx_error_handler)(const char *msg) = quit_gmx;
 622
 623 void set_gmx_error_handler(void (*func)(const char *msg))
 624 {
 625 #ifdef GMX_THREADS
 626     tMPI_Thread_mutex_lock(&debug_mutex);
 627 #endif
 628     gmx_error_handler = func;
 629 #ifdef GMX_THREADS
 630     tMPI_Thread_mutex_unlock(&debug_mutex);
 631 #endif
 632 }
 633
 634 char *gmx_strerror(const char *key)
 635 {
 636   typedef struct {
 637     const char *key,*msg;
 638   } error_msg_t;
 639   error_msg_t msg[] = {
 640     { "bug",    "Possible bug" },
 641     { "call",   "Routine should not have been called" },
 642     { "comm",   "Communication (parallel processing) problem" },
 643     { "fatal",  "Fatal error" },
 644     { "cmd",    "Invalid command line argument" },
 645     { "file",   "File input/output error" },
 646     { "impl",   "Implementation restriction" },
 647     { "incons", "Software inconsistency error" },
 648     { "input",  "Input error or input inconsistency" },
 649     { "mem",    "Memory allocation/freeing error" },
 650     { "open",   "Can not open file" },
 651     { "range",  "Range checking error" }
 652   };
 653 #define NMSG asize(msg)
 654   char buf[1024];
 655   size_t i;
 656
 657   if (key == NULL)
 658     return strdup("Empty message");
 659   else {
 660     for(i=0; (i<NMSG); i++)
 661       if (strcmp(key,msg[i].key) == 0)
 662         break;
 663     if (i == NMSG) {
 664       sprintf(buf,"No error message associated with key %s\n%s",key,gmxuser);
 665       return strdup(buf);
 666     }
 667     else
 668       return strdup(msg[i].msg);
 669   }
 670 }
 671
 672
 673 void _gmx_error(const char *key,const char *msg,const char *file,int line)
 674 {
 675   char buf[10240],tmpbuf[1024],errerrbuf[1024];
 676     int  cqnum;
 677     const char *llines = "-------------------------------------------------------";
 678     char *strerr;
 679
 680     /* protect the audience from suggestive discussions */
 681
 682     if (msg == NULL)
 683     {
 684         sprintf(errerrbuf,"Empty fatal_error message. %s",gmxuser);
 685     }
 686
 687     cool_quote(tmpbuf,1023,&cqnum);
 688     strerr = gmx_strerror(key);
 689     sprintf(buf,"\n%s\nProgram %s, %s\n"
 690             "Source code file: %s, line: %d\n\n"
 691             "%s:\n%s\nFor more information and tips for troubleshooting, please check the GROMACS\n"
 692             "website at http://www.gromacs.org/Documentation/Errors\n%s\n\n%s\n",
 693             llines,ShortProgram(),GromacsVersion(),file,line,
 694             strerr,msg ? msg : errerrbuf,llines,tmpbuf);
 695     free(strerr);
 696
 697     gmx_error_handler(buf);
 698 }
 699
 700 void _range_check(int n,int n_min,int n_max,const char *warn_str,
 701                   const char *var,const char *file,int line)
 702 {
 703   char buf[1024];
 704
 705   if ((n < n_min) || (n >= n_max)) {
 706     if (warn_str != NULL) {
 707       strcpy(buf,warn_str);
 708       strcat(buf,"\n");
 709     }
 710     else
 711       buf[0] = '\0';
 712
 713     sprintf(buf+strlen(buf),"Variable %s has value %d. It should have been "
 714             "within [ %d .. %d ]\n",var,n,n_min,n_max);
 715
 716     _gmx_error("range",buf,file,line);
 717   }
 718 }
 719
 720 void gmx_warning(const char *fmt,...)
 721 {
 722     va_list ap;
 723     char msg[STRLEN];
 724
 725     va_start(ap,fmt);
 726
 727     parse_printf_args(fmt,&ap,msg);
 728
 729     va_end(ap);
 730
 731     fprintf(stderr,"\nWARNING: %s\n\n",msg);
 732 }