xref: /netbsd/src/usr.bin/make/make.h

/*        $NetBSD: make.h,v 1.353 2025/04/22 19:28:50 rillig Exp $    */

/*
 * Copyright (c) 1988, 1989, 1990, 1993
 *        The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Adam de Boor.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *        from: @(#)make.h    8.3 (Berkeley) 6/13/95
 */

/*
 * Copyright (c) 1989 by Berkeley Softworks
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Adam de Boor.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the University of
 *        California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *        from: @(#)make.h    8.3 (Berkeley) 6/13/95
 */

/*
 * make.h --
 *        The global definitions for make
 */

#ifndef MAKE_MAKE_H
#define MAKE_MAKE_H

#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>

#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#ifdef BSD4_4
# include <sys/cdefs.h>
#endif

#ifndef FD_CLOEXEC
#define FD_CLOEXEC 1
#endif

#if defined(__GNUC__)
#define MAKE_GNUC_PREREQ(x, y)                                                            \
          ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) ||                        \
           (__GNUC__ > (x)))
#else
#define MAKE_GNUC_PREREQ(x, y)          0
#endif

#if MAKE_GNUC_PREREQ(2, 7) || lint
#define MAKE_ATTR_UNUSED      __attribute__((__unused__))
#else
#define MAKE_ATTR_UNUSED      /* delete */
#endif

#if MAKE_GNUC_PREREQ(2, 5)
#define MAKE_ATTR_DEAD                  __attribute__((__noreturn__))
#elif defined(__GNUC__)
#define MAKE_ATTR_DEAD                  __volatile
#else
#define MAKE_ATTR_DEAD                  /* delete */
#endif

#if MAKE_GNUC_PREREQ(2, 7)
#define MAKE_ATTR_PRINTFLIKE(fmtarg, firstvararg) \
              __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
#else
#define MAKE_ATTR_PRINTFLIKE(fmtarg, firstvararg) /* delete */
#endif

#if MAKE_GNUC_PREREQ(4, 0)
#define MAKE_ATTR_USE                   __attribute__((__warn_unused_result__))
#else
#define MAKE_ATTR_USE                   /* delete */
#endif

#if MAKE_GNUC_PREREQ(8, 0)
#define MAKE_ATTR_NOINLINE              __attribute__((__noinline__))
#else
#define MAKE_ATTR_NOINLINE              /* delete */
#endif

#if __STDC_VERSION__ >= 199901L || defined(lint)
#define MAKE_INLINE static inline MAKE_ATTR_UNUSED
#else
#define MAKE_INLINE static MAKE_ATTR_UNUSED
#endif

/* MAKE_STATIC marks a function that may or may not be inlined. */
#if defined(lint)
/* As of 2021-07-31, NetBSD lint ignores __attribute__((unused)). */
#define MAKE_STATIC MAKE_INLINE
#else
#define MAKE_STATIC static MAKE_ATTR_UNUSED
#endif

#if __STDC_VERSION__ >= 199901L || defined(lint) || defined(USE_C99_BOOLEAN)
#include <stdbool.h>
#elif defined(__bool_true_false_are_defined)
/*
 * All files of make must be compiled with the same definition of bool.
 * Since one of the files includes <stdbool.h>, that means the header is
 * available on this platform.  Recompile everything with -DUSE_C99_BOOLEAN.
 */
#error "<stdbool.h> is included in pre-C99 mode"
#elif defined(bool) || defined(true) || defined(false)
/*
 * In pre-C99 mode, make does not expect that bool is already defined.
 * You need to ensure that all translation units use the same definition for
 * bool.
 */
#error "bool/true/false is defined in pre-C99 mode"
#else
typedef unsigned char bool;
#define true        1
#define false       0
#endif

/*
 * In code coverage mode with gcc>=12, calling vfork/exec does not mark any
 * further code from the parent process as covered. gcc-10.5.0 is fine, as
 * are fork/exec calls, as well as posix_spawn.
 */
#ifndef FORK_FUNCTION
#define FORK_FUNCTION vfork
#endif

#include "lst.h"
#include "make_malloc.h"
#include "str.h"
#include "hash.h"
#include "config.h"
#include "buf.h"

/*
 * The typical flow of states is:
 *
 * The direct successful path:
 * UNMADE -> BEINGMADE -> MADE.
 *
 * The direct error path:
 * UNMADE -> BEINGMADE -> ERROR.
 *
 * The successful path when dependencies need to be made first:
 * UNMADE -> DEFERRED -> REQUESTED -> BEINGMADE -> MADE.
 *
 * A node that has dependencies, and one of the dependencies cannot be made:
 * UNMADE -> DEFERRED -> ABORTED.
 *
 * A node that turns out to be up-to-date:
 * UNMADE -> BEINGMADE -> UPTODATE.
 */
typedef enum GNodeMade {
          /* Not examined yet. */
          UNMADE,
          /*
           * The node has been examined but is not yet ready since its
           * dependencies have to be made first.
           */
          DEFERRED,

          /* The node is on the toBeMade list. */
          REQUESTED,

          /*
           * The node is already being made. Trying to build a node in this
           * state indicates a cycle in the graph.
           */
          BEINGMADE,

          /* Was out-of-date and has been made. */
          MADE,
          /* Was already up-to-date, does not need to be made. */
          UPTODATE,
          /*
           * An error occurred while it was being made. Used only in compat
           * mode.
           */
          ERROR,
          /*
           * The target was aborted due to an error making a dependency. Used
           * only in compat mode.
           */
          ABORTED
} GNodeMade;

/*
 * The OP_ constants are used when parsing a dependency line as a way of
 * communicating to other parts of the program the way in which a target
 * should be made.
 *
 * Some of the OP_ constants can be combined, others cannot.
 *
 * See the tests depsrc-*.mk and deptgt-*.mk.
 */
typedef enum GNodeType {
          OP_NONE             = 0,

          /*
           * The dependency operator ':' is the most common one.  The commands
           * of this node are executed if any child is out-of-date.
           */
          OP_DEPENDS          = 1 << 0,
          /*
           * The dependency operator '!' always executes its commands, even if
           * its children are up-to-date.
           */
          OP_FORCE  = 1 << 1,
          /*
           * The dependency operator '::' behaves like ':', except that it
           * allows multiple dependency groups to be defined.  Each of these
           * groups is executed on its own, independently from the others. Each
           * individual dependency group is called a cohort.
           */
          OP_DOUBLEDEP        = 1 << 2,

          /* Matches the dependency operators ':', '!' and '::'. */
          OP_OPMASK = OP_DEPENDS | OP_FORCE | OP_DOUBLEDEP,

          /* Don't care if the target doesn't exist and can't be created. */
          OP_OPTIONAL         = 1 << 3,
          /* Use associated commands for parents. */
          OP_USE              = 1 << 4,
          /*
           * Target is never out of date, but always execute commands anyway.
           * Its time doesn't matter, so it has none...sort of.
           */
          OP_EXEC             = 1 << 5,
          /*
           * Ignore non-zero exit status from shell commands when creating the
           * node.
           */
          OP_IGNORE = 1 << 6,
          /* Don't remove the target when interrupted. */
          OP_PRECIOUS         = 1 << 7,
          /* Don't echo commands when executed. */
          OP_SILENT = 1 << 8,
          /*
           * Target is a recursive make so its commands should always be
           * executed when it is out of date, regardless of the state of the -n
           * or -t flags.
           */
          OP_MAKE             = 1 << 9,
          /*
           * Target is out-of-date only if any of its children was out-of-date.
           */
          OP_JOIN             = 1 << 10,
          /* Assume the children of the node have been already made. */
          OP_MADE             = 1 << 11,
          /* Special .BEGIN, .END or .INTERRUPT. */
          OP_SPECIAL          = 1 << 12,
          /* Like .USE, only prepend commands. */
          OP_USEBEFORE        = 1 << 13,
          /*
           * The node is invisible to its parents. I.e. it doesn't show up in
           * the parents' local variables (.IMPSRC, .ALLSRC).
           */
          OP_INVISIBLE        = 1 << 14,
          /*
           * The node does not become the main target, even if it is the first
           * target in the first makefile.
           */
          OP_NOTMAIN          = 1 << 15,
          /* Not a file target; run always. */
          OP_PHONY  = 1 << 16,
          /* Don't search for the file in the path. */
          OP_NOPATH = 1 << 17,
          /*
           * In a dependency line "target: source1 .WAIT source2", source1 is
           * made first, including its children.  Once that is finished,
           * source2 is made, including its children.  The .WAIT keyword may
           * appear more than once in a single dependency declaration.
           */
          OP_WAIT             = 1 << 18,
          /* .NOMETA do not create a .meta file */
          OP_NOMETA = 1 << 19,
          /* .META we _do_ want a .meta file */
          OP_META             = 1 << 20,
          /* Do not compare commands in .meta file */
          OP_NOMETA_CMP       = 1 << 21,
          /* Possibly a submake node */
          OP_SUBMAKE          = 1 << 22,

          /* Attributes applied by PMake */

          /* The node is a transformation rule, such as ".c.o". */
          OP_TRANSFORM        = 1 << 30,
          /* Target is a member of an archive */
          /* XXX: How does this differ from OP_ARCHV? */
          OP_MEMBER = 1 << 29,
          /*
           * The node is a library, its name has the form "-l<libname>".
           */
          OP_LIB              = 1 << 28,
          /*
           * The node is an archive member, its name has the form
           * "archive(member)".
           */
          /* XXX: How does this differ from OP_MEMBER? */
          OP_ARCHV  = 1 << 27,
          /*
           * Target has all the commands it should. Used when parsing to catch
           * multiple command groups for a target.  Only applies to the
           * dependency operators ':' and '!', but not to '::'.
           */
          OP_HAS_COMMANDS     = 1 << 26,
          /*
           * The special command "..." has been seen. All further commands from
           * this node will be saved on the .END node instead, to be executed
           * at the very end.
           */
          OP_SAVE_CMDS        = 1 << 25,
          /*
           * Already processed by Suff_FindDeps, to find dependencies from
           * suffix transformation rules.
           */
          OP_DEPS_FOUND       = 1 << 24,
          /* Node found while expanding .ALLSRC */
          OP_MARK             = 1 << 23
} GNodeType;

typedef struct GNodeFlags {
          /* this target needs to be (re)made */
          bool remake:1;
          /* children of this target were made */
          bool childMade:1;
          /* children don't exist, and we pretend made */
          bool force:1;
          /* Set by Make_ProcessWait() */
          bool doneWait:1;
          /* Build requested by .ORDER processing */
          bool doneOrder:1;
          /* Node created from .depend */
          bool fromDepend:1;
          /* We do it once only */
          bool doneAllsrc:1;
          /* Used by MakePrintStatus */
          bool cycle:1;
          /* Used by MakePrintStatus */
          bool doneCycle:1;
} GNodeFlags;

typedef struct List StringList;
typedef struct ListNode StringListNode;

typedef struct List GNodeList;
typedef struct ListNode GNodeListNode;

typedef struct SearchPath {
          List /* of CachedDir */ dirs;
} SearchPath;

/*
 * A graph node represents a target that can possibly be made, including its
 * relation to other targets.
 */
typedef struct GNode {
          /* The target's name, such as "clean" or "make.c" */
          char *name;
          /* The unexpanded name of a .USE node */
          char *uname;
          /*
           * The full pathname of the file belonging to the target.
           *
           * XXX: What about .PHONY targets? These don't have an associated
           * path.
           */
          char *path;

          /*
           * The type of operator used to define the sources (see the OP flags
           * below).
           *
           * XXX: This looks like a wild mixture of type and flags.
           */
          GNodeType type;
          GNodeFlags flags;

          /* The state of processing on this node */
          GNodeMade made;
          /* The number of unmade children */
          int unmade;

          /*
           * The modification time; 0 means the node does not have a
           * corresponding file; see GNode_IsOODate.
           */
          time_t mtime;
          struct GNode *youngestChild;

          /*
           * The GNodes for which this node is an implied source. May be empty.
           * For example, when there is an inference rule for .c.o, the node
           * for file.c has the node for file.o in this list.
           */
          GNodeList implicitParents;

          /*
           * The nodes that depend on this one, or in other words, the nodes
           * for which this is a source.
           */
          GNodeList parents;
          /* The nodes on which this one depends. */
          GNodeList children;

          /*
           * .ORDER nodes we need made. The nodes that must be made (if they're
           * made) before this node can be made, but that do not enter into the
           * datedness of this node.
           */
          GNodeList order_pred;
          /*
           * .ORDER nodes who need us. The nodes that must be made (if they're
           * made at all) after this node is made, but that do not depend on
           * this node, in the normal sense.
           */
          GNodeList order_succ;

          /*
           * Other nodes of the same name, for targets that were defined using
           * the '::' dependency operator (OP_DOUBLEDEP).
           */
          GNodeList cohorts;
          /* The "#n" suffix for this cohort, or "" for other nodes */
          char cohort_num[8];
          /* The number of unmade instances on the cohorts list */
          int unmade_cohorts;
          /*
           * Pointer to the first instance of a '::' node; only set when on a
           * cohorts list
           */
          struct GNode *centurion;

          /* Last time (sequence number) we tried to make this node */
          unsigned checked_seqno;

          /*
           * The "local" variables that are specific to this target and this
           * target only, such as $@, $<, $?.
           *
           * Also used for the global variable scopes SCOPE_GLOBAL,
           * SCOPE_CMDLINE, SCOPE_INTERNAL, which contain variables with
           * arbitrary names.
           */
          HashTable /* of Var pointer */ vars;

          /* The commands to be given to a shell to create this target. */
          StringList commands;

          /*
           * Suffix for the node (determined by Suff_FindDeps and opaque to
           * everyone but the Suff module)
           */
          struct Suffix *suffix;

          /* Filename where the GNode got defined, unlimited lifetime */
          const char *fname;
          /* Line number where the GNode got defined, 1-based */
          unsigned lineno;
          int exit_status;
} GNode;

/*
 * Keep track of whether to include <posix.mk> when parsing the line
 * '.POSIX:'.
 */
extern enum PosixState {
          PS_NOT_YET,
          PS_MAYBE_NEXT_LINE,
          PS_NOW_OR_NEVER,
          PS_SET,
          PS_TOO_LATE
} posix_state;

/* Error levels for diagnostics during parsing. */
typedef enum ParseErrorLevel {
          /*
           * Exit when the current top-level makefile has been parsed
           * completely.
           */
          PARSE_FATAL = 1,
          /* Print "warning"; may be upgraded to fatal by the -w option. */
          PARSE_WARNING,
          /* Informational, mainly used during development of makefiles. */
          PARSE_INFO
} ParseErrorLevel;

/*
 * Values returned by Cond_EvalLine and Cond_EvalCondition.
 */
typedef enum CondResult {
          CR_TRUE,            /* Parse the next lines */
          CR_FALSE,           /* Skip the next lines */
          CR_ERROR            /* Unknown directive or parse error */
} CondResult;

typedef struct {
          enum GuardKind {
                    GK_VARIABLE,
                    GK_TARGET
          } kind;
          char *name;
} Guard;

/* Names of the variables that are "local" to a specific target. */
#define TARGET      "@"                 /* Target of dependency */
#define OODATE      "?"                 /* All out-of-date sources */
#define ALLSRC      ">"                 /* All sources */
#define IMPSRC      "<"                 /* Source implied by transformation */
#define PREFIX      "*"                 /* Common prefix */
#define ARCHIVE     "!"                 /* Archive in "archive(member)" syntax */
#define MEMBER      "%"                 /* Member in "archive(member)" syntax */

/*
 * Global Variables
 */

/* True if every target is precious */
extern bool allPrecious;
/* True if failed targets should be deleted */
extern bool deleteOnError;
/* true while processing .depend */
extern bool doing_depend;
/* .DEFAULT rule */
extern GNode *defaultNode;

/*
 * Variables defined internally by make which should not override those set
 * by makefiles.
 */
extern GNode *SCOPE_INTERNAL;
/* Variables defined in a global scope, e.g in the makefile itself. */
extern GNode *SCOPE_GLOBAL;
/* Variables defined on the command line. */
extern GNode *SCOPE_CMDLINE;

/*
 * Value returned by Var_Parse when an error is encountered. It points to an
 * empty string, so naive callers needn't worry about it.
 */
extern char var_Error[];

/* The time at the start of this whole process */
extern time_t now;

/*
 * The list of directories to search when looking for targets (set by the
 * special target .PATH).
 */
extern SearchPath dirSearchPath;
/* Used for .include "...". */
extern SearchPath *parseIncPath;
/*
 * Used for .include <...>, for the built-in sys.mk and for makefiles from
 * the command line arguments.
 */
extern SearchPath *sysIncPath;
/* The default for sysIncPath. */
extern SearchPath *defSysIncPath;

/* Startup directory */
extern char curdir[];
/* The basename of the program name, suffixed with [n] for sub-makes.  */
extern const char *progname;
extern int makelevel;
/* Name of the .depend makefile */
extern char *makeDependfile;
/* If we replaced environ, this will be non-NULL. */
extern char **savedEnv;
extern GNode *mainNode;

extern pid_t myPid;

#define MAKEFLAGS   ".MAKEFLAGS"
#ifndef MAKE_LEVEL_ENV
# define MAKE_LEVEL_ENV       "MAKELEVEL"
#endif

typedef struct DebugFlags {
          bool DEBUG_ARCH:1;
          bool DEBUG_COND:1;
          bool DEBUG_CWD:1;
          bool DEBUG_DIR:1;
          bool DEBUG_ERROR:1;
          bool DEBUG_FOR:1;
          bool DEBUG_GRAPH1:1;
          bool DEBUG_GRAPH2:1;
          bool DEBUG_GRAPH3:1;
          bool DEBUG_HASH:1;
          bool DEBUG_JOB:1;
          bool DEBUG_LOUD:1;
          bool DEBUG_MAKE:1;
          bool DEBUG_META:1;
          bool DEBUG_PARSE:1;
          bool DEBUG_SCRIPT:1;
          bool DEBUG_SHELL:1;
          bool DEBUG_SUFF:1;
          bool DEBUG_TARG:1;
          bool DEBUG_VAR:1;
} DebugFlags;

#define CONCAT(a, b) a##b

#define DEBUG(module) (opts.debug.CONCAT(DEBUG_, module))

void debug_printf(const char *, ...) MAKE_ATTR_PRINTFLIKE(1, 2);

#define DEBUG_IMPL(module, args) \
          do { \
                    if (DEBUG(module)) \
                              debug_printf args; \
          } while (false)

#define DEBUG0(module, fmt) \
          DEBUG_IMPL(module, (fmt))
#define DEBUG1(module, fmt, arg1) \
          DEBUG_IMPL(module, (fmt, arg1))
#define DEBUG2(module, fmt, arg1, arg2) \
          DEBUG_IMPL(module, (fmt, arg1, arg2))
#define DEBUG3(module, fmt, arg1, arg2, arg3) \
          DEBUG_IMPL(module, (fmt, arg1, arg2, arg3))
#define DEBUG4(module, fmt, arg1, arg2, arg3, arg4) \
          DEBUG_IMPL(module, (fmt, arg1, arg2, arg3, arg4))
#define DEBUG5(module, fmt, arg1, arg2, arg3, arg4, arg5) \
          DEBUG_IMPL(module, (fmt, arg1, arg2, arg3, arg4, arg5))

typedef enum PrintVarsMode {
          PVM_NONE,
          PVM_UNEXPANDED,
          PVM_EXPANDED
} PrintVarsMode;

/* Command line options */
typedef struct CmdOpts {
          /* -B: whether to be compatible to traditional make */
          bool compatMake;

          /*
           * -d: debug control: There is one flag per module.  It is up to the
           * module what debug information to print.
           */
          DebugFlags debug;

          /* -dF: debug output is written here - default stderr */
          FILE *debug_file;

          /*
           * -dL: lint mode
           *
           * Runs make in strict mode, with additional checks and better error
           * handling.
           */
          bool strict;

          /* -dV: for the -V option, print unexpanded variable values */
          bool debugVflag;

          /* -e: check environment variables before global variables */
          bool checkEnvFirst;

          /* -f: the makefiles to read */
          StringList makefiles;

          /* -i: if true, ignore all errors from shell commands */
          bool ignoreErrors;

          /*
           * -j: the maximum number of jobs that can run in parallel; this is
           * coordinated with the submakes
           */
          int maxJobs;

          /*
           * -k: if true and an error occurs while making a node, continue
           * making nodes that do not depend on the erroneous node
           */
          bool keepgoing;

          /* -N: execute no commands from the targets */
          bool noRecursiveExecute;

          /* -n: execute almost no commands from the targets */
          bool noExecute;

          /*
           * -q: if true, do not really make anything, just see if the targets
           * are out-of-date
           */
          bool query;

          /* -r: raw mode, do not load the builtin rules. */
          bool noBuiltins;

          /* -s: don't echo the shell commands before executing them */
          bool silent;

          /*
           * -t: touch the targets if they are out-of-date, but don't actually
           * make them
           */
          bool touch;

          /* -[Vv]: print expanded or unexpanded selected variables */
          PrintVarsMode printVars;
          /* -[Vv]: the variables to print */
          StringList variables;

          /* -W: if true, makefile parsing warnings are treated as errors */
          bool parseWarnFatal;

          /* -w: print 'Entering' and 'Leaving' for submakes */
          bool enterFlag;

          /*
           * -X: if true, do not export variables set on the command line to
           * the environment.
           */
          bool varNoExportEnv;

          /*
           * The target names specified on the command line. Used to resolve
           * .if make(...) statements.
           */
          StringList create;

          /*
           * Randomize the order in which the targets from toBeMade are made,
           * to catch undeclared dependencies.
           */
          bool randomizeTargets;
} CmdOpts;

extern CmdOpts opts;
extern bool forceJobs;
extern char **environ;

/* arch.c */
void Arch_Init(void);
#ifdef CLEANUP
void Arch_End(void);
#endif

bool Arch_ParseArchive(char **, GNodeList *, GNode *);
void Arch_Touch(GNode *);
void Arch_TouchLib(GNode *);
void Arch_UpdateMTime(GNode *);
void Arch_UpdateMemberMTime(GNode *);
void Arch_FindLib(GNode *, SearchPath *);
bool Arch_LibOODate(GNode *) MAKE_ATTR_USE;
bool Arch_IsLib(GNode *) MAKE_ATTR_USE;

/* compat.c */
bool Compat_RunCommand(const char *, GNode *, StringListNode *);
void Compat_MakeAll(GNodeList *);
void Compat_Make(GNode *, GNode *);

/* cond.c */
extern unsigned cond_depth;
CondResult Cond_EvalCondition(const char *) MAKE_ATTR_USE;
CondResult Cond_EvalLine(const char *) MAKE_ATTR_USE;
Guard *Cond_ExtractGuard(const char *) MAKE_ATTR_USE;
void Cond_EndFile(void);

/* dir.c; see also dir.h */

MAKE_INLINE const char * MAKE_ATTR_USE
str_basename(const char *pathname)
{
          const char *lastSlash = strrchr(pathname, '/');
          return lastSlash != NULL ? lastSlash + 1 : pathname;
}

MAKE_INLINE SearchPath * MAKE_ATTR_USE
SearchPath_New(void)
{
          SearchPath *path = bmake_malloc(sizeof *path);
          Lst_Init(&path->dirs);
          return path;
}

void SearchPath_Free(SearchPath *);

/* for.c */
struct ForLoop;
int For_Eval(const char *) MAKE_ATTR_USE;
bool For_Accum(const char *, int *) MAKE_ATTR_USE;
void For_Run(unsigned, unsigned);
bool For_NextIteration(struct ForLoop *, Buffer *);
char *ForLoop_Details(const struct ForLoop *);
void ForLoop_Free(struct ForLoop *);
void For_Break(struct ForLoop *);

/* job.c */
void JobReapChild(pid_t, int, bool);

/* longer than this we use a temp file */
#ifndef MAKE_CMDLEN_LIMIT
# define MAKE_CMDLEN_LIMIT 1000
#endif
/* main.c */
void Main_ParseArgLine(const char *);
int Cmd_Argv(const char *, size_t, const char **, size_t, char *, size_t, bool, bool);
char *Cmd_Exec(const char *, char **) MAKE_ATTR_USE;
void Error(const char *, ...) MAKE_ATTR_PRINTFLIKE(1, 2);
void Fatal(const char *, ...) MAKE_ATTR_PRINTFLIKE(1, 2) MAKE_ATTR_DEAD;
void Punt(const char *, ...) MAKE_ATTR_PRINTFLIKE(1, 2) MAKE_ATTR_DEAD;
void DieHorribly(void) MAKE_ATTR_DEAD;
int unlink_file(const char *) MAKE_ATTR_USE;
void execDie(const char *, const char *);
char *getTmpdir(void) MAKE_ATTR_USE;
bool ParseBoolean(const char *, bool) MAKE_ATTR_USE;
const char *cached_realpath(const char *, char *);
bool GetBooleanExpr(const char *, bool);

/* parse.c */
extern int parseErrors;
void Parse_Init(void);
#ifdef CLEANUP
void Parse_End(void);
#endif

void PrintLocation(FILE *, bool, const GNode *);
void PrintStackTrace(bool);
void Parse_Error(ParseErrorLevel, const char *, ...) MAKE_ATTR_PRINTFLIKE(2, 3);
bool Parse_VarAssign(const char *, bool, GNode *) MAKE_ATTR_USE;
void Parse_File(const char *, int);
void Parse_PushInput(const char *, unsigned, unsigned, Buffer,
                         struct ForLoop *);
void Parse_MainName(GNodeList *);
unsigned CurFile_CondMinDepth(void) MAKE_ATTR_USE;
void Parse_GuardElse(void);
void Parse_GuardEndif(void);


/* suff.c */
void Suff_Init(void);
#ifdef CLEANUP
void Suff_End(void);
#endif

void Suff_ClearSuffixes(void);
bool Suff_IsTransform(const char *) MAKE_ATTR_USE;
GNode *Suff_AddTransform(const char *);
void Suff_EndTransform(GNode *);
void Suff_AddSuffix(const char *);
SearchPath *Suff_GetPath(const char *) MAKE_ATTR_USE;
void Suff_ExtendPaths(void);
void Suff_AddInclude(const char *);
void Suff_AddLib(const char *);
void Suff_FindDeps(GNode *);
SearchPath *Suff_FindPath(GNode *) MAKE_ATTR_USE;
void Suff_SetNull(const char *);
void Suff_PrintAll(void);
char *Suff_NamesStr(void) MAKE_ATTR_USE;

/* targ.c */
void Targ_Init(void);
void Targ_End(void);

void Targ_Stats(void);
GNodeList *Targ_List(void) MAKE_ATTR_USE;
GNode *GNode_New(const char *) MAKE_ATTR_USE;
GNode *Targ_FindNode(const char *) MAKE_ATTR_USE;
GNode *Targ_GetNode(const char *) MAKE_ATTR_USE;
GNode *Targ_NewInternalNode(const char *) MAKE_ATTR_USE;
GNode *Targ_GetEndNode(void);
void Targ_FindList(GNodeList *, StringList *);
void Targ_PrintCmds(GNode *);
void Targ_PrintNode(GNode *, int);
void Targ_PrintNodes(GNodeList *, int);
const char *Targ_FmtTime(time_t) MAKE_ATTR_USE;
void Targ_PrintType(GNodeType);
void Targ_PrintGraph(int);
void Targ_Propagate(void);
const char *GNodeMade_Name(GNodeMade) MAKE_ATTR_USE;
#ifdef CLEANUP
void Parse_RegisterCommand(char *);
#else
MAKE_INLINE
void Parse_RegisterCommand(char *cmd MAKE_ATTR_UNUSED)
{
}
#endif

/* var.c */

typedef enum VarEvalMode {

          /*
           * Only parse the expression but don't evaluate any part of it.
           *
           * TODO: Document what Var_Parse and Var_Subst return in this mode.
           *  As of 2021-03-15, they return unspecified, inconsistent results.
           */
          VARE_PARSE,

          /*
           * Parse text in which '${...}' and '$(...)' are not parsed as
           * subexpressions (with all their individual escaping rules) but
           * instead simply as text with balanced '${}' or '$()'.  Other '$'
           * are copied verbatim.
           */
          VARE_PARSE_BALANCED,

          /* Parse and evaluate the expression. */
          VARE_EVAL,

          /*
           * Parse and evaluate the expression.  It is an error if a
           * subexpression evaluates to undefined.
           */
          VARE_EVAL_DEFINED_LOUD,

          /*
           * Parse and evaluate the expression.  It is a silent error if a
           * subexpression evaluates to undefined.
           */
          VARE_EVAL_DEFINED,

          /*
           * Parse and evaluate the expression.  Keep undefined variables as-is
           * instead of expanding them to an empty string.
           *
           * Example for a ':=' assignment:
           *        CFLAGS = $(.INCLUDES)
           *        CFLAGS := -I.. $(CFLAGS)
           *        # If .INCLUDES (an undocumented special variable, by the
           *        # way) is still undefined, the updated CFLAGS becomes
           *        # "-I.. $(.INCLUDES)".
           */
          VARE_EVAL_KEEP_UNDEFINED,

          /*
           * Parse and evaluate the expression.  Keep '$$' as '$$' and preserve
           * undefined subexpressions.
           */
          VARE_EVAL_KEEP_DOLLAR_AND_UNDEFINED
} VarEvalMode;

typedef enum VarSetFlags {
          VAR_SET_NONE                  = 0,

          /* do not export */
          VAR_SET_NO_EXPORT   = 1 << 0,

          /*
           * Make the variable read-only. No further modification is possible,
           * except for another call to Var_Set with the same flag. See the
           * special targets '.NOREADONLY' and '.READONLY'.
           */
          VAR_SET_READONLY    = 1 << 1,
          VAR_SET_INTERNAL    = 1 << 2
} VarSetFlags;

typedef enum VarExportMode {
          /* .export-all */
          VEM_ALL,
          /* .export-env */
          VEM_ENV,
          /* .export: Initial export or update an already exported variable. */
          VEM_PLAIN,
          /* .export-literal: Do not expand the variable value. */
          VEM_LITERAL
} VarExportMode;

void Var_Delete(GNode *, const char *);
#ifdef CLEANUP
void Var_DeleteAll(GNode *scope);
#endif
void Var_Undef(const char *);
void Var_Set(GNode *, const char *, const char *);
void Var_SetExpand(GNode *, const char *, const char *);
void Var_SetWithFlags(GNode *, const char *, const char *, VarSetFlags);
void Var_Append(GNode *, const char *, const char *);
void Var_AppendExpand(GNode *, const char *, const char *);
bool Var_Exists(GNode *, const char *) MAKE_ATTR_USE;
bool Var_ExistsExpand(GNode *, const char *) MAKE_ATTR_USE;
FStr Var_Value(GNode *, const char *) MAKE_ATTR_USE;
const char *GNode_ValueDirect(GNode *, const char *) MAKE_ATTR_USE;
FStr Var_Parse(const char **, GNode *, VarEvalMode);
char *Var_Subst(const char *, GNode *, VarEvalMode);
char *Var_SubstInTarget(const char *, GNode *);
void Var_Expand(FStr *, GNode *, VarEvalMode);
void Var_Stats(void);
void Var_Dump(GNode *);
void Var_ReexportVars(GNode *);
void Var_Export(VarExportMode, const char *);
void Var_ExportVars(const char *);
void Var_UnExport(bool, const char *);
void Var_ReadOnly(const char *, bool);

void Global_Set(const char *, const char *);
void Global_Append(const char *, const char *);
void Global_Delete(const char *);
void Global_Set_ReadOnly(const char *, const char *);

bool EvalStack_PrintDetails(void) MAKE_ATTR_USE;

/* util.c */
typedef void (*SignalProc)(int);
SignalProc bmake_signal(int, SignalProc);

/* make.c */
void GNode_UpdateYoungestChild(GNode *, GNode *);
bool GNode_IsOODate(GNode *) MAKE_ATTR_USE;
void Make_ExpandUse(GNodeList *);
time_t Make_Recheck(GNode *) MAKE_ATTR_USE;
void Make_HandleUse(GNode *, GNode *);
void Make_Update(GNode *);
void GNode_SetLocalVars(GNode *);
bool Make_Run(GNodeList *);
bool shouldDieQuietly(GNode *, int) MAKE_ATTR_USE;
void PrintOnError(GNode *, const char *);
void Main_ExportMAKEFLAGS(bool);
bool Main_SetObjdir(bool, const char *, ...) MAKE_ATTR_PRINTFLIKE(2, 3);
int mkTempFile(const char *, char *, size_t) MAKE_ATTR_USE;
void AppendWords(StringList *, char *);
void GNode_FprintDetails(FILE *, const char *, const GNode *, const char *);
bool GNode_ShouldExecute(GNode *gn) MAKE_ATTR_USE;

/* See if the node was seen on the left-hand side of a dependency operator. */
MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsTarget(const GNode *gn)
{
          return (gn->type & OP_OPMASK) != OP_NONE;
}

MAKE_INLINE const char * MAKE_ATTR_USE
GNode_Path(const GNode *gn)
{
          return gn->path != NULL ? gn->path : gn->name;
}

MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsWaitingFor(const GNode *gn)
{
          return gn->flags.remake && gn->made <= REQUESTED;
}

MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsReady(const GNode *gn)
{
          return gn->made > DEFERRED;
}

MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsDone(const GNode *gn)
{
          return gn->made >= MADE;
}

MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsError(const GNode *gn)
{
          return gn->made == ERROR || gn->made == ABORTED;
}

MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsMainCandidate(const GNode *gn)
{
          return (gn->type & (OP_NOTMAIN | OP_USE | OP_USEBEFORE |
                                  OP_EXEC | OP_TRANSFORM)) == 0;
}

/* Return whether the target file should be preserved on interrupt. */
MAKE_INLINE bool MAKE_ATTR_USE
GNode_IsPrecious(const GNode *gn)
{
          /* XXX: Why are '::' targets precious? */
          return allPrecious || gn->type & (OP_PRECIOUS | OP_DOUBLEDEP);
}

MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarTarget(GNode *gn) { return GNode_ValueDirect(gn, TARGET); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarOodate(GNode *gn) { return GNode_ValueDirect(gn, OODATE); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarAllsrc(GNode *gn) { return GNode_ValueDirect(gn, ALLSRC); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarImpsrc(GNode *gn) { return GNode_ValueDirect(gn, IMPSRC); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarPrefix(GNode *gn) { return GNode_ValueDirect(gn, PREFIX); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarArchive(GNode *gn) { return GNode_ValueDirect(gn, ARCHIVE); }
MAKE_INLINE const char * MAKE_ATTR_USE
GNode_VarMember(GNode *gn) { return GNode_ValueDirect(gn, MEMBER); }

MAKE_INLINE void * MAKE_ATTR_USE
UNCONST(const void *ptr)
{
          void *ret;
          memcpy(&ret, &ptr, sizeof(ret));
          return ret;
}

/* At least GNU/Hurd systems lack hardcoded MAXPATHLEN/PATH_MAX */
#include <limits.h>
#ifndef MAXPATHLEN
#define MAXPATHLEN  4096
#endif
#ifndef PATH_MAX
#define PATH_MAX    MAXPATHLEN
#endif

#if defined(SYSV)
#define KILLPG(pid, sig) kill(-(pid), (sig))
#else
#define KILLPG(pid, sig) killpg((pid), (sig))
#endif

MAKE_INLINE bool MAKE_ATTR_USE
ch_isalnum(char ch) { return isalnum((unsigned char)ch) != 0; }
MAKE_INLINE bool MAKE_ATTR_USE
ch_isalpha(char ch) { return isalpha((unsigned char)ch) != 0; }
MAKE_INLINE bool MAKE_ATTR_USE
ch_isdigit(char ch) { return isdigit((unsigned char)ch) != 0; }
MAKE_INLINE bool MAKE_ATTR_USE
ch_islower(char ch) { return islower((unsigned char)ch) != 0; }
MAKE_INLINE bool MAKE_ATTR_USE
ch_isspace(char ch) { return isspace((unsigned char)ch) != 0; }
MAKE_INLINE bool MAKE_ATTR_USE
ch_isupper(char ch) { return isupper((unsigned char)ch) != 0; }
MAKE_INLINE char MAKE_ATTR_USE
ch_tolower(char ch) { return (char)tolower((unsigned char)ch); }
MAKE_INLINE char MAKE_ATTR_USE
ch_toupper(char ch) { return (char)toupper((unsigned char)ch); }

MAKE_INLINE void
cpp_skip_whitespace(const char **pp)
{
          while (ch_isspace(**pp))
                    (*pp)++;
}

MAKE_INLINE void
cpp_skip_hspace(const char **pp)
{
          while (**pp == ' ' || **pp == '\t')
                    (*pp)++;
}

MAKE_INLINE bool
cpp_skip_string(const char **pp, const char *s)
{
          const char *p = *pp;
          while (*p == *s && *s != '\0')
                    p++, s++;
          if (*s == '\0')
                    *pp = p;
          return *s == '\0';
}

MAKE_INLINE void
pp_skip_whitespace(char **pp)
{
          while (ch_isspace(**pp))
                    (*pp)++;
}

MAKE_INLINE void
pp_skip_hspace(char **pp)
{
          while (**pp == ' ' || **pp == '\t')
                    (*pp)++;
}

#if defined(lint)
void do_not_define_rcsid(void); /* for lint */
# define MAKE_RCSID(id) void do_not_define_rcsid(void)
#elif defined(MAKE_NATIVE)
# include <sys/cdefs.h>
# define MAKE_RCSID(id) __RCSID(id)
#elif defined(MAKE_ALL_IN_ONE) && defined(__COUNTER__)
# define MAKE_RCSID_CONCAT(x, y) CONCAT(x, y)
# define MAKE_RCSID(id) static volatile char \
          MAKE_RCSID_CONCAT(rcsid_, __COUNTER__)[] = id
#elif defined(MAKE_ALL_IN_ONE)
# define MAKE_RCSID(id) void do_not_define_rcsid(void)
#else
# define MAKE_RCSID(id) static volatile char rcsid[] = id
#endif

#endif