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Date:	Sat, 26 Mar 2005 15:14:21 +0200
From:	"Eli Zaretskii" <eliz AT gnu DOT org>
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	(ogi AT fmi DOT uni-sofia DOT bg)
Subject:	Re: Emacs 21.4a
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> From: "Ognyan Kulev" <ogi AT fmi DOT uni-sofia DOT bg>
> Date: 25 Mar 2005 09:28:35 -0800
> 
> gcc -c  -Demacs -DHAVE_CONFIG_H   -I. -I.       -O2 -gcoff sysdep.c
> sysdep.c: In function `sys_subshell':
> sysdep.c:777: error: `PATH_MAX' undeclared (first use in this function)
> sysdep.c:777: error: (Each undeclared identifier is reported only once
> sysdep.c:777: error: for each function it appears in.)

??? How could this happen?  PATH_MAX is defined in the header limits.h
that is supplied with DJGPP.  sysdep.c has this fragment near line
109:

    #ifdef MSDOS    /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
    #include <dos.h>
    #include "dosfns.h"
    #include "msdos.h"
    #include <sys/param.h>

MSDOS is defined in the DJGPP build (by the compiler).  Given that it
is defined, the above fragment includes sys/param.h, also a standard
DJGPP header, which in turn includes limits.h.  So this should make
PATH_MAX defined (to the value of 512).

Please see which one of these doesn't work for you, and why.

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