unresolved linker errors in eVC (PocketPC)

[Allan Bruce]

I am porting one of my applications to PocketPC and have run into a problem.
I use time() to get the current time and also localtime() to get some extra
information. Everything compiles fine but I get a linker error:

WinClient.obj : error LNK2001: unresolved external symbol time
ChatWindow.obj : error LNK2019: unresolved external symbol localtime
referenced in function "public: static void __cdecl
ChatWindow::FormatDate(unsigned short *)" (?FormatDate@ChatWindow@@SAXPAG@Z)
MIPSII_FPDbg/PPCWinClient.exe : fatal error LNK1120: 2 unresolved externals

Does anybody know what lib file I need to include to get this working?
Thanks.
Allan

[Jeff Henkels]

"Allan Bruce" <a...@abc.net> wrote in message
news:nuudnY62e_t...@pipex.net...

As far as I know, time/localtime aren't supported in the CE run-time
library -- use the Windows APIs GetSystemTime/GetLocalTime instead. Also,
you might also want to look at GetDateFormat/GetTimeFormat; they do string
formatting based on locale & user control panel settings.

[Keks Keksov]

There are two options in solving your problems:

1. If you have a lot of unsupported by WCE functions then use portlib
which is a part of http://www.symbolictools.de/public/pocketconsole/

Note: For creating WCE console application u have to link against
portlib.lib
rename main to wmain and alter entry-point symbol in project's
settings:
Link::Output::mainWCRTStartup

2. Use following functions if u need 'time' and 'localtime' only:

This code is based on SQLite port to WinCE
(http://sqlite-wince.sourceforge.net/)

/*********************************************
* getSecondsSince1970
*********************************************/
time_t getSecondsSince1970()
{

time_t seconds; // C run-time time (defined in <time.h>)

#if defined(_WIN32_WCE) && !defined(_ATL_DLL) && defined(_AFXDLL) //
WinCE with MFC support
seconds = WCE_FCTN(time) (NULL) ;

#elif defined(_WIN32_WCE) // thank you MS for not including 'time'
functions into WCE :-/
FILETIME uf;
SYSTEMTIME st;

GetSystemTime(&st);
SystemTimeToFileTime(&st, &uf);

ULONGLONG i64 = ( (ULONGLONG)uf.dwHighDateTime << 32 ) +
(ULONGLONG)uf.dwLowDateTime; // nanoseconds since 1601
osBinaryTime = (time_t)(( i64 - 116444736000000000 ) / 10000000);

#else // for the rest of the normal world with UNIX 'time' implemented
time(&seconds);
#endif

return(seconds);
}

/*
** Implementation of the localtime function for systems not having it.
** Convert time_t to local time in tm struct format.
*/
struct tm * sqlitewce_localtime( const time_t *timer )
{
static struct tm s_tm;
FILETIME uf, lf;
SYSTEMTIME ls;
// Convert time_t to FILETIME
unsigned __int64 i64 = Int32x32To64(timer, 10000000) +
116444736000000000;
uf.dwLowDateTime = (DWORD) i64;
uf.dwHighDateTime = (DWORD) (i64 >> 32);
// Convert UTC(GMT) FILETIME to local FILETIME
FileTimeToLocalFileTime( &uf, &lf );
// Convert FILETIME to SYSTEMTIME
FileTimeToSystemTime( &lf, &ls );
// Convert SYSTEMTIME to tm
s_tm.tm_sec = ls.wSecond;
s_tm.tm_min = ls.wMinute;
s_tm.tm_hour = ls.wHour;
s_tm.tm_mday = ls.wDay;
s_tm.tm_mon = ls.wMonth -1;
s_tm.tm_year = ls.wYear - 1900;
s_tm.tm_wday = ls.wDayOfWeek;
// Return pointer to static data
return &s_tm;
}

Regards,
Dim Zegebart aka Keks Keksov