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From:	"Ozkan Sezer (sezeroz AT gmail DOT com) [via djgpp-workers AT delorie DOT com]" <djgpp-workers AT delorie DOT com>
Date:	Sat, 6 Aug 2016 20:10:33 +0300
Message-ID:	<CAA2C=vD2ML8fKhCmH=g8Q4QkjgfPJ0CMg17DB31obdvxe9BQhw@mail.gmail.com>
Subject:	Re: linking more bloat from ctime.c
To:	djgpp-workers AT delorie DOT com
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On 8/6/16, Rugxulo (rugxulo AT gmail DOT com) [via djgpp-workers AT delorie DOT com]
<djgpp-workers AT delorie DOT com> wrote:
> Hi, guys,
>
> (Okay, so this isn't a hugely critical issue, nor a priority, so
> please don't think I'm complaining. I just wanted to mention it for
> completeness.)
>
> We've already discussed the bloat of ctime.c several times over the
> years. The most recent discussion was two years ago (2014/04/21), from
> Ozkan Sezer, titled "ctime.c changes add about 4.5k more size".
>
> (I found that entire thread chain by searching my email archives and
> then further searching on
> http://www.delorie.com/djgpp/mail-archives/search.cgi with the
> keywords "+crazy +changes +mktime".)
>
> http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-workers/2014/04/21/02:44:35
>
> Here's the real problem: *printf (or, more specifically, doprnt.o). A
> lot has changed since 2.03p2. One very simple test of mine showed
> this:
>
> (2.03p2):
> LITE     EXE        44,032
> SCANF    EXE        47,616
> PRINTF   EXE        51,712
> BOTH     EXE        55,296
>
> (2.05):
> LITE     EXE        72,192
> SCANF    EXE        84,480
> PRINTF   EXE        89,088
> BOTH     EXE       100,352
>
> Yes, I know, hard drives are cheap. And of course 99% of all C
> programs actually need and want to use *printf. But, even
> acknowledging that, I think it's a mistake to link in the full
> doprnt.o just for a single line in an (here by me) unused routine in
> ctime.c by default.
>
> // === badprint.c begins ===
> /*
>   re: DJGPP 2.05 (DJDEV-/DJLSR205.ZIP) ...
>
>   I only want a simple call to time(), but that needs gettimeofday(),
>   and gettimeofday() needs mktime() and localtime(), both of which
>   are included inside ctime.o !!
>
>   We must stop ctime.o from pulling in sprintf()'s (bloated) doprnt.o !!
>
>    text    data     bss     dec     hex filename
>   10832    2644   14464   27940    6d24 ctime.o
>   15712     188       8   15908    3e24 doprnt.o
>
>   sprintf() is called by asctime_r(), which itself is called by
>   asctime(), but ctime() also calls asctime() and ctime_r() also
>   calls asctime_r() !!
>
>   The single offending sprintf format string is as follows:
>
>   "%.3s %.3s%3d %02d:%02d:%02d %d\n"
>
>   This should be easy to simulate without needing to include the
>   full doprnt.o !!
> */
>
> #include <stdio.h>
>
> int sprintf(char* buffer, const char* format, ...)
> {
>   fputs("Someone is calling me??? I'm a (fake) sprintf() stub!!!",stderr);
>   return 0;
> }
> // === badprint.c ends ===
>
> P.S. In one minimal program of mine, the solution I found recently was
> to not use time() at all (for srand() ), instead relying on
> (non-standard!) Turbo C's gettime(), which doesn't need all the bloat
> (since I was already avoiding printf() there as unnecessary). My point
> is that I assume ctime.c can be "fixed" to not need sprintf() at all,
> which would be more ideal than either of these kludges, right?
>

To overcome the bloat from ctime.c, I have been using the attached
djtime.c for some time.  It also avoids all timezone thingies.  Maybe it
would be useful to you and-or to someone else.

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