/* Miscellaneous global declarations and portability cruft for GNU Make.
Copyright (C) 1988, 89, 90, 91, 92, 93, 94, 95 Free Software Foundation, Inc.
This file is part of GNU Make.

GNU Make is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Make is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Make; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* AIX requires this to be the first thing in the file.  */
#if defined (_AIX) && !defined (__GNUC__)
 #pragma alloca
#endif

/* We use <config.h> instead of "config.h" so that a compilation
   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
   (which it would do because make.h was found in $srcdir).  */
#include <config.h>
#undef	HAVE_CONFIG_H
#define HAVE_CONFIG_H

#ifdef	CRAY
/* This must happen before #include <signal.h> so
   that the declaration therein is changed.  */
#define	signal	bsdsignal
#endif

#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include <stdio.h>
#include <ctype.h>
#ifdef HAVE_SYS_TIMEB_H
/* SCO 3.2 "devsys 4.2" has a prototype for `ftime' in <time.h> that bombs
   unless <sys/timeb.h> has been included first.  Does every system have a
   <sys/timeb.h>?  If any does not, configure should check for it.  */
#include <sys/timeb.h>
#endif
#include <time.h>
#include <errno.h>

#ifndef	errno
extern int errno;
#endif

#ifndef	isblank
#define	isblank(c)	((c) == ' ' || (c) == '\t')
#endif

#ifdef	HAVE_UNISTD_H
#include <unistd.h>
/* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
   POSIX.1 behavior with `cc -YPOSIX', which predefines POSIX itself!  */
#if defined (_POSIX_VERSION) && !defined (ultrix)
#define	POSIX
#endif
#endif

/* Some systems define _POSIX_VERSION but are not really POSIX.1.  */
#if (defined (butterfly) || defined (__arm) || \
     (defined (__mips) && defined (_SYSTYPE_SVR3)) || \
     (defined (sequent) && defined (i386)))
#undef POSIX
#endif

#if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
#define POSIX
#endif

#if !defined (HAVE_SYS_SIGLIST) && defined (HAVE__SYS_SIGLIST)
#define	sys_siglist	_sys_siglist
#define	HAVE_SYS_SIGLIST	/* Now we have it.  */

/* It was declared in <signal.h>, with who knows what type.
   Don't declare it again and risk conflicting.  */
#define	SYS_SIGLIST_DECLARED
#endif

#ifdef HAVE_SYS_SIGLIST
#ifndef SYS_SIGLIST_DECLARED
extern char *sys_siglist[];
#endif
#else
#include "signame.h"
#endif

/* Some systems do not define NSIG in <signal.h>.  */
#ifndef	NSIG
#ifdef	_NSIG
#define	NSIG	_NSIG
#else
#define	NSIG	32
#endif
#endif

#ifndef	RETSIGTYPE
#define	RETSIGTYPE	void
#endif

#ifndef	sigmask
#define	sigmask(sig)	(1 << ((sig) - 1))
#endif

#ifdef	HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef	HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifndef	PATH_MAX
#ifndef	POSIX
#define	PATH_MAX	MAXPATHLEN
#endif	/* Not POSIX.  */
#endif	/* No PATH_MAX.  */
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif	/* No MAXPATHLEN.  */

#ifdef	PATH_MAX
#define	GET_PATH_MAX	PATH_MAX
#define	PATH_VAR(var)	char var[PATH_MAX]
#else
#define	NEED_GET_PATH_MAX
extern unsigned int get_path_max ();
#define	GET_PATH_MAX	(get_path_max ())
#define	PATH_VAR(var)	char *var = (char *) alloca (GET_PATH_MAX)
#endif

#ifdef	STAT_MACROS_BROKEN
#ifdef	S_ISREG
#undef	S_ISREG
#endif
#ifdef	S_ISDIR
#undef	S_ISDIR
#endif
#endif	/* STAT_MACROS_BROKEN.  */

#ifndef	S_ISREG
#define	S_ISREG(mode)	(((mode) & S_IFMT) == S_IFREG)
#endif
#ifndef	S_ISDIR
#define	S_ISDIR(mode)	(((mode) & S_IFMT) == S_IFDIR)
#endif


#if	(defined (STDC_HEADERS) || defined (__GNU_LIBRARY__))
#include <stdlib.h>
#include <string.h>
#define	ANSI_STRING
#else	/* No standard headers.  */

#ifdef HAVE_STRING_H
#include <string.h>
#define	ANSI_STRING
#else
#include <strings.h>
#endif
#ifdef	HAVE_MEMORY_H
#include <memory.h>
#endif

extern char *malloc (), *realloc ();
extern void free ();

extern void abort (), exit ();

#endif	/* Standard headers.  */

#ifdef	ANSI_STRING

#ifndef	index
#define	index(s, c)	strchr((s), (c))
#endif
#ifndef	rindex
#define	rindex(s, c)	strrchr((s), (c))
#endif

#ifndef	bcmp
#define bcmp(s1, s2, n)	memcmp ((s1), (s2), (n))
#endif
#ifndef	bzero
#define bzero(s, n)	memset ((s), 0, (n))
#endif
#ifndef	bcopy
#define bcopy(s, d, n)	memcpy ((d), (s), (n))
#endif

#else	/* Not ANSI_STRING.  */

#ifndef	bcmp
extern int bcmp ();
#endif
#ifndef	bzero
extern void bzero ();
#endif
#ifndef	bcopy
extern void bcopy ();
#endif

#endif	/* ANSI_STRING.  */
#undef	ANSI_STRING

/* SCO Xenix has a buggy macro definition in <string.h>.  */
#undef	strerror

#ifndef ANSI_STRING
extern char *strerror ();
#endif


#ifdef	__GNUC__
#undef	alloca
#define	alloca(n)	__builtin_alloca (n)
#else	/* Not GCC.  */
#ifdef	HAVE_ALLOCA_H
#include <alloca.h>
#else	/* Not HAVE_ALLOCA_H.  */
#ifndef	_AIX
extern char *alloca ();
#endif	/* Not AIX.  */
#endif	/* HAVE_ALLOCA_H.  */
#endif	/* GCC.  */

#ifndef	iAPX286
#define streq(a, b) \
  ((a) == (b) || \
   (*(a) == *(b) && (*(a) == '\0' || !strcmp ((a) + 1, (b) + 1))))
#else
/* Buggy compiler can't handle this.  */
#define streq(a, b) (strcmp ((a), (b)) == 0)
#endif

/* Add to VAR the hashing value of C, one character in a name.  */
#define	HASH(var, c) \
  ((var += (c)), (var = ((var) << 7) + ((var) >> 20)))

#if defined(__GNUC__) || defined(ENUM_BITFIELDS)
#define	ENUM_BITFIELD(bits)	:bits
#else
#define	ENUM_BITFIELD(bits)
#endif

#ifdef __MSDOS__
#define PATH_SEPARATOR_CHAR ';'
#else
#define PATH_SEPARATOR_CHAR ':'
#endif

extern void die ();
extern void message (), fatal (), error ();
extern void makefile_error (), makefile_fatal ();
extern void pfatal_with_name (), perror_with_name ();
extern char *savestring (), *concat ();
extern char *xmalloc (), *xrealloc ();
extern char *find_next_token (), *next_token (), *end_of_token ();
extern void collapse_continuations (), remove_comments ();
extern char *sindex (), *lindex ();
extern int alpha_compare ();
extern void print_spaces ();
extern struct dep *copy_dep_chain ();
extern char *find_char_unquote (), *find_percent ();

#ifndef	NO_ARCHIVES
extern int ar_name ();
extern void ar_parse_name ();
extern int ar_touch ();
extern time_t ar_member_date ();
#endif

extern void dir_load ();
extern int dir_file_exists_p (), file_exists_p (), file_impossible_p ();
extern void file_impossible ();
extern char *dir_name ();

extern void define_default_variables ();
extern void set_default_suffixes (), install_default_suffix_rules ();
extern void install_default_implicit_rules (), count_implicit_rule_limits ();
extern void convert_to_pattern (), create_pattern_rule ();

extern void build_vpath_lists (), construct_vpath_list ();
extern int vpath_search ();

extern void construct_include_path ();
extern void uniquize_deps ();

extern int update_goal_chain ();
extern void notice_finished_file ();

extern void user_access (), make_access (), child_access ();


#ifdef	HAVE_VFORK_H
#include <vfork.h>
#endif

/* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
   because such systems often declare the in header files anyway.  */

#if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION)

extern long int atol ();
extern long int lseek ();

#endif	/* Not GNU C library or POSIX.  */

#ifdef	HAVE_GETCWD
extern char *getcwd ();
#else
extern char *getwd ();
#define	getcwd(buf, len)	getwd (buf)
#endif

extern char **environ;

extern char *reading_filename;
extern unsigned int *reading_lineno_ptr;

extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
extern int debug_flag, print_data_base_flag, question_flag, touch_flag;
extern int env_overrides, no_builtin_rules_flag, print_version_flag;
extern int print_directory_flag, warn_undefined_variables_flag;
extern int posix_pedantic;

extern unsigned int job_slots;
extern double max_load_average;

extern char *program;
extern char *starting_directory;
extern unsigned int makelevel;
extern char *version_string, *remote_description;

extern unsigned int commands_started;

extern int handling_fatal_signal;


#define DEBUGPR(msg) \
  do if (debug_flag) { print_spaces (depth); printf (msg, file->name); \
		       fflush (stdout); } while (0)