Hello Andrew,
if gettimeofday fails it returns -1,
if gmtime fails it returns NULL.
To avoid segmentation faults, please, provide error handling as follows:
/* POSIX version ******************************************************/
#if defined(HAVE_SYS_TIME_H) && defined(HAVE_GETTIMEOFDAY)
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <string.h>
double glp_time(void)
{ struct timeval tv;
struct tm *tm;
int j;
double t;
if (-1 == gettimeofday(&tv, NULL)) {
xerror("%s\n", strerror(errno));
}
tm = gmtime(&tv.tv_sec);
xassert(tm != NULL);
j = jday(tm->tm_mday, tm->tm_mon + 1, 1900 + tm->tm_year);
xassert(j >= 0);
t = ((((double)(j - EPOCH) * 24.0 + (double)tm->tm_hour) * 60.0 +
(double)tm->tm_min) * 60.0 + (double)tm->tm_sec) * 1000.0 +
(double)(tv.tv_usec / 1000);
return t;
}
In 2010 there was an error in gettimeofday as reported here:
http://sourceforge.net/mailarchive/forum.php?thread_name=p2j647fe9b11004200426j44e74180y3e627a0f302bed76%40mail.gmail.com&forum_name=mingw-w64-public
Best regards
Heinrich Schuchardt
Thank you for your bug report.
The exception happens in a Posix version of glp_time function. It is
difficult to say what is wrong, most likely it is some MINGW64
inconsistency, because under GNU/Linux this code works.
To fix the bug you may simply to disable using the configuration header
(created by the configure script) by replacing the fragment in file
glpk-4.51/src/env/time.c, lines 24-26:
#ifdef HAVE_CONFIG_H
#include<config.h>
#endif
with the following one:
#if 0
#include<config.h>
#endif
In this case an ANSI portable version will be used, which should work on
any platform.
Hope this helps.
BTW, who displays the message "warning: Invalid parameter passed to C
runtime function." ? It is not a glpk message.
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