/*-
*-----------------------------------------------------------------------
* Make_Update --
* Perform update on the parents of a node. Used by JobFinish once
* a node has been dealt with and by MakeStartJobs if it finds an
* up-to-date node.
*
* Input:
* cgn the child node
*
* Results:
* Always returns 0
*
* Side Effects:
* The unmade field of pgn is decremented and pgn may be placed on
* the toBeMade queue if this field becomes 0.
*
* If the child was made, the parent's flag CHILDMADE field will be
* set true.
*
* If the child is not up-to-date and still does not exist,
* set the FORCE flag on the parents.
*
* If the child wasn't made, the cmgn field of the parent will be
* altered if the child's mtime is big enough.
*
* Finally, if the child is the implied source for the parent, the
* parent's IMPSRC variable is set appropriately.
*
*-----------------------------------------------------------------------
*/
void
Make_Update(GNode *cgn)
{
GNode *pgn; /* the parent node */
char *cname; /* the child's name */
LstNode ln; /* Element in parents and iParents lists */
time_t mtime = -1;
char *p1;
Lst parents;
GNode *centurion;
/* It is save to re-examine any nodes again */
checked++;
cname = Var_Value(TARGET, cgn, &p1);
if (p1)
free(p1);
if (DEBUG(MAKE))
fprintf(debug_file, "Make_Update: %s%s\n", cgn->name, cgn->cohort_num);
/*
* If the child was actually made, see what its modification time is
* now -- some rules won't actually update the file. If the file still
* doesn't exist, make its mtime now.
*/
if (cgn->made != UPTODATE) {
mtime = Make_Recheck(cgn);
}
/*
* If this is a `::' node, we must consult its first instance
* which is where all parents are linked.
*/
if ((centurion = cgn->centurion) != NULL) {
if (!Lst_IsEmpty(cgn->parents))
Punt("%s%s: cohort has parents", cgn->name, cgn->cohort_num);
centurion->unmade_cohorts -= 1;
if (centurion->unmade_cohorts < 0)
Error("Graph cycles through centurion %s", centurion->name);
} else {
centurion = cgn;
}
parents = centurion->parents;
/* If this was a .ORDER node, schedule the RHS */
Lst_ForEach(centurion->order_succ, MakeBuildParent, Lst_First(toBeMade));
/* Now mark all the parents as having one less unmade child */
if (Lst_Open(parents) == SUCCESS) {
while ((ln = Lst_Next(parents)) != NULL) {
pgn = (GNode *)Lst_Datum(ln);
if (DEBUG(MAKE))
fprintf(debug_file, "inspect parent %s%s: flags %x, "
"type %x, made %d, unmade %d ",
pgn->name, pgn->cohort_num, pgn->flags,
pgn->type, pgn->made, pgn->unmade-1);
if (!(pgn->flags & REMAKE)) {
/* This parent isn't needed */
if (DEBUG(MAKE))
fprintf(debug_file, "- not needed\n");
continue;
}
if (mtime == 0 && !(cgn->type & OP_WAIT))
pgn->flags |= FORCE;
/*
* If the parent has the .MADE attribute, its timestamp got
* updated to that of its newest child, and its unmake
* child count got set to zero in Make_ExpandUse().
* However other things might cause us to build one of its
* children - and so we mustn't do any processing here when
* the child build finishes.
*/
if (pgn->type & OP_MADE) {
if (DEBUG(MAKE))
fprintf(debug_file, "- .MADE\n");
continue;
}
if ( ! (cgn->type & (OP_EXEC|OP_USE|OP_USEBEFORE))) {
if (cgn->made == MADE)
pgn->flags |= CHILDMADE;
(void)Make_TimeStamp(pgn, cgn);
}
/*
* A parent must wait for the completion of all instances
* of a `::' dependency.
*/
if (centurion->unmade_cohorts != 0 || centurion->made < MADE) {
if (DEBUG(MAKE))
fprintf(debug_file,
"- centurion made %d, %d unmade cohorts\n",
centurion->made, centurion->unmade_cohorts);
continue;
}
/* One more child of this parent is now made */
pgn->unmade -= 1;
if (pgn->unmade < 0) {
if (DEBUG(MAKE)) {
fprintf(debug_file, "Graph cycles through %s%s\n",
pgn->name, pgn->cohort_num);
Targ_PrintGraph(2);
}
Error("Graph cycles through %s%s", pgn->name, pgn->cohort_num);
}
/* We must always rescan the parents of .WAIT and .ORDER nodes. */
if (pgn->unmade != 0 && !(centurion->type & OP_WAIT)
&& !(centurion->flags & DONE_ORDER)) {
if (DEBUG(MAKE))
fprintf(debug_file, "- unmade children\n");
continue;
}
if (pgn->made != DEFERRED) {
/*
* Either this parent is on a different branch of the tree,
* or it on the RHS of a .WAIT directive
* or it is already on the toBeMade list.
*/
if (DEBUG(MAKE))
fprintf(debug_file, "- not deferred\n");
continue;
}
if (pgn->order_pred
&& Lst_ForEach(pgn->order_pred, MakeCheckOrder, 0)) {
/* A .ORDER rule stops us building this */
continue;
}
if (DEBUG(MAKE)) {
static int two = 2;
fprintf(debug_file, "- %s%s made, schedule %s%s (made %d)\n",
cgn->name, cgn->cohort_num,
pgn->name, pgn->cohort_num, pgn->made);
Targ_PrintNode(pgn, &two);
}
/* Ok, we can schedule the parent again */
pgn->made = REQUESTED;
(void)Lst_EnQueue(toBeMade, pgn);
}
Lst_Close(parents);
}
/*
* Set the .PREFIX and .IMPSRC variables for all the implied parents
* of this node.
*/
if (Lst_Open(cgn->iParents) == SUCCESS) {
char *cpref = Var_Value(PREFIX, cgn, &p1);
while ((ln = Lst_Next(cgn->iParents)) != NULL) {
pgn = (GNode *)Lst_Datum(ln);
if (pgn->flags & REMAKE) {
Var_Set(IMPSRC, cname, pgn, 0);
if (cpref != NULL)
Var_Set(PREFIX, cpref, pgn, 0);
}
}
if (p1)
free(p1);
Lst_Close(cgn->iParents);
}
}
/*-
* main --
* The main function, for obvious reasons. Initializes variables
* and a few modules, then parses the arguments give it in the
* environment and on the command line. Reads the system makefile
* followed by either Makefile, makefile or the file given by the
* -f argument. Sets the .MAKEFLAGS PMake variable based on all the
* flags it has received by then uses either the Make or the Compat
* module to create the initial list of targets.
*
* Results:
* If -q was given, exits -1 if anything was out-of-date. Else it exits
* 0.
*
* Side Effects:
* The program exits when done. Targets are created. etc. etc. etc.
*/
int
main(int argc, char **argv)
{
Lst targs; /* target nodes to create -- passed to Make_Init */
Boolean outOfDate = FALSE; /* FALSE if all targets up to date */
struct stat sb, sa;
char *p1, *path, *pwd;
char mdpath[MAXPATHLEN];
const char *machine = getenv("MACHINE");
const char *machine_arch = getenv("MACHINE_ARCH");
char *syspath = getenv("MAKESYSPATH");
Lst sysMkPath; /* Path of sys.mk */
char *cp = NULL, *start;
/* avoid faults on read-only strings */
static char defsyspath[] = _PATH_DEFSYSPATH;
char found_path[MAXPATHLEN + 1]; /* for searching for sys.mk */
struct timeval rightnow; /* to initialize random seed */
#ifdef MAKE_NATIVE
struct utsname utsname;
#endif
/* default to writing debug to stderr */
debug_file = stderr;
#ifdef SIGINFO
(void)bmake_signal(SIGINFO, siginfo);
#endif
/*
* Set the seed to produce a different random sequence
* on each program execution.
*/
gettimeofday(&rightnow, NULL);
srandom(rightnow.tv_sec + rightnow.tv_usec);
if ((progname = strrchr(argv[0], '/')) != NULL)
progname++;
else
progname = argv[0];
#if defined(RLIMIT_NOFILE) && !defined(__minix)
/*
* get rid of resource limit on file descriptors
*/
{
struct rlimit rl;
if (getrlimit(RLIMIT_NOFILE, &rl) != -1 &&
rl.rlim_cur != rl.rlim_max) {
rl.rlim_cur = rl.rlim_max;
(void)setrlimit(RLIMIT_NOFILE, &rl);
}
}
#endif
/*
* Get the name of this type of MACHINE from utsname
* so we can share an executable for similar machines.
* (i.e. m68k: amiga hp300, mac68k, sun3, ...)
*
* Note that both MACHINE and MACHINE_ARCH are decided at
* run-time.
*/
if (!machine) {
#ifdef MAKE_NATIVE
if (uname(&utsname) == -1) {
(void)fprintf(stderr, "%s: uname failed (%s).\n", progname,
strerror(errno));
exit(2);
}
machine = utsname.machine;
#else
#ifdef MAKE_MACHINE
machine = MAKE_MACHINE;
#else
machine = "unknown";
#endif
#endif
}
if (!machine_arch) {
#ifndef MACHINE_ARCH
#ifdef MAKE_MACHINE_ARCH
machine_arch = MAKE_MACHINE_ARCH;
#else
machine_arch = "unknown";
#endif
#else
machine_arch = MACHINE_ARCH;
#endif
}
myPid = getpid(); /* remember this for vFork() */
/*
* Just in case MAKEOBJDIR wants us to do something tricky.
*/
Var_Init(); /* Initialize the lists of variables for
* parsing arguments */
Var_Set("MACHINE", machine, VAR_GLOBAL, 0);
Var_Set("MACHINE_ARCH", machine_arch, VAR_GLOBAL, 0);
#ifdef MAKE_VERSION
Var_Set("MAKE_VERSION", MAKE_VERSION, VAR_GLOBAL, 0);
#endif
Var_Set(".newline", "\n", VAR_GLOBAL, 0); /* handy for :@ loops */
/*
* This is the traditional preference for makefiles.
*/
#ifndef MAKEFILE_PREFERENCE_LIST
# define MAKEFILE_PREFERENCE_LIST "makefile Makefile"
#endif
Var_Set(MAKEFILE_PREFERENCE, MAKEFILE_PREFERENCE_LIST,
VAR_GLOBAL, 0);
Var_Set(MAKE_DEPENDFILE, ".depend", VAR_GLOBAL, 0);
create = Lst_Init(FALSE);
makefiles = Lst_Init(FALSE);
printVars = FALSE;
variables = Lst_Init(FALSE);
beSilent = FALSE; /* Print commands as executed */
ignoreErrors = FALSE; /* Pay attention to non-zero returns */
noExecute = FALSE; /* Execute all commands */
noRecursiveExecute = FALSE; /* Execute all .MAKE targets */
keepgoing = FALSE; /* Stop on error */
allPrecious = FALSE; /* Remove targets when interrupted */
queryFlag = FALSE; /* This is not just a check-run */
noBuiltins = FALSE; /* Read the built-in rules */
touchFlag = FALSE; /* Actually update targets */
debug = 0; /* No debug verbosity, please. */
jobsRunning = FALSE;
maxJobs = DEFMAXLOCAL; /* Set default local max concurrency */
maxJobTokens = maxJobs;
compatMake = FALSE; /* No compat mode */
ignorePWD = FALSE;
/*
* Initialize the parsing, directory and variable modules to prepare
* for the reading of inclusion paths and variable settings on the
* command line
*/
/*
* Initialize various variables.
* MAKE also gets this name, for compatibility
* .MAKEFLAGS gets set to the empty string just in case.
* MFLAGS also gets initialized empty, for compatibility.
*/
Parse_Init();
if (argv[0][0] == '/' || strchr(argv[0], '/') == NULL) {
/*
* Leave alone if it is an absolute path, or if it does
* not contain a '/' in which case we need to find it in
* the path, like execvp(3) and the shells do.
*/
p1 = argv[0];
} else {
/*
* A relative path, canonicalize it.
*/
p1 = realpath(argv[0], mdpath);
if (!p1 || *p1 != '/' || stat(p1, &sb) < 0) {
p1 = argv[0]; /* realpath failed */
}
}
Var_Set("MAKE", p1, VAR_GLOBAL, 0);
Var_Set(".MAKE", p1, VAR_GLOBAL, 0);
Var_Set(MAKEFLAGS, "", VAR_GLOBAL, 0);
Var_Set(MAKEOVERRIDES, "", VAR_GLOBAL, 0);
Var_Set("MFLAGS", "", VAR_GLOBAL, 0);
Var_Set(".ALLTARGETS", "", VAR_GLOBAL, 0);
/*
* Set some other useful macros
*/
{
char tmp[64];
const char *ep;
if (!(ep = getenv(MAKE_LEVEL))) {
ep = "0";
}
Var_Set(MAKE_LEVEL, ep, VAR_GLOBAL, 0);
snprintf(tmp, sizeof(tmp), "%u", myPid);
Var_Set(".MAKE.PID", tmp, VAR_GLOBAL, 0);
snprintf(tmp, sizeof(tmp), "%u", getppid());
Var_Set(".MAKE.PPID", tmp, VAR_GLOBAL, 0);
}
Job_SetPrefix();
/*
* First snag any flags out of the MAKE environment variable.
* (Note this is *not* MAKEFLAGS since /bin/make uses that and it's
* in a different format).
*/
#ifdef POSIX
Main_ParseArgLine(getenv("MAKEFLAGS"));
#else
Main_ParseArgLine(getenv("MAKE"));
#endif
/*
* Find where we are (now).
* We take care of PWD for the automounter below...
*/
if (getcwd(curdir, MAXPATHLEN) == NULL) {
(void)fprintf(stderr, "%s: getcwd: %s.\n",
progname, strerror(errno));
exit(2);
}
MainParseArgs(argc, argv);
/*
* Verify that cwd is sane.
*/
if (stat(curdir, &sa) == -1) {
(void)fprintf(stderr, "%s: %s: %s.\n",
progname, curdir, strerror(errno));
exit(2);
}
/*
* All this code is so that we know where we are when we start up
* on a different machine with pmake.
* Overriding getcwd() with $PWD totally breaks MAKEOBJDIRPREFIX
* since the value of curdir can vary depending on how we got
* here. Ie sitting at a shell prompt (shell that provides $PWD)
* or via subdir.mk in which case its likely a shell which does
* not provide it.
* So, to stop it breaking this case only, we ignore PWD if
* MAKEOBJDIRPREFIX is set or MAKEOBJDIR contains a transform.
*/
if (!ignorePWD &&
(pwd = getenv("PWD")) != NULL &&
getenv("MAKEOBJDIRPREFIX") == NULL) {
const char *makeobjdir = getenv("MAKEOBJDIR");
if (makeobjdir == NULL || !strchr(makeobjdir, '$')) {
if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino &&
sa.st_dev == sb.st_dev)
(void)strncpy(curdir, pwd, MAXPATHLEN);
}
}
Var_Set(".CURDIR", curdir, VAR_GLOBAL, 0);
/*
* Find the .OBJDIR. If MAKEOBJDIRPREFIX, or failing that,
* MAKEOBJDIR is set in the environment, try only that value
* and fall back to .CURDIR if it does not exist.
*
* Otherwise, try _PATH_OBJDIR.MACHINE, _PATH_OBJDIR, and
* finally _PATH_OBJDIRPREFIX`pwd`, in that order. If none
* of these paths exist, just use .CURDIR.
*/
Dir_Init(curdir);
(void)Main_SetObjdir(curdir);
if ((path = getenv("MAKEOBJDIRPREFIX")) != NULL) {
(void)snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir);
(void)Main_SetObjdir(mdpath);
} else if ((path = getenv("MAKEOBJDIR")) != NULL) {
(void)Main_SetObjdir(path);
} else {
(void)snprintf(mdpath, MAXPATHLEN, "%s.%s", _PATH_OBJDIR, machine);
if (!Main_SetObjdir(mdpath) && !Main_SetObjdir(_PATH_OBJDIR)) {
(void)snprintf(mdpath, MAXPATHLEN, "%s%s",
_PATH_OBJDIRPREFIX, curdir);
(void)Main_SetObjdir(mdpath);
}
}
/*
* Be compatible if user did not specify -j and did not explicitly
* turned compatibility on
*/
if (!compatMake && !forceJobs) {
compatMake = TRUE;
}
/*
* Initialize archive, target and suffix modules in preparation for
* parsing the makefile(s)
*/
Arch_Init();
Targ_Init();
Suff_Init();
Trace_Init(tracefile);
DEFAULT = NULL;
(void)time(&now);
Trace_Log(MAKESTART, NULL);
/*
* Set up the .TARGETS variable to contain the list of targets to be
* created. If none specified, make the variable empty -- the parser
* will fill the thing in with the default or .MAIN target.
*/
if (!Lst_IsEmpty(create)) {
LstNode ln;
for (ln = Lst_First(create); ln != NULL;
ln = Lst_Succ(ln)) {
char *name = (char *)Lst_Datum(ln);
Var_Append(".TARGETS", name, VAR_GLOBAL);
}
} else
Var_Set(".TARGETS", "", VAR_GLOBAL, 0);
/*
* If no user-supplied system path was given (through the -m option)
* add the directories from the DEFSYSPATH (more than one may be given
* as dir1:...:dirn) to the system include path.
*/
if (syspath == NULL || *syspath == '\0')
syspath = defsyspath;
else
syspath = bmake_strdup(syspath);
for (start = syspath; *start != '\0'; start = cp) {
for (cp = start; *cp != '\0' && *cp != ':'; cp++)
continue;
if (*cp == ':') {
*cp++ = '\0';
}
/* look for magic parent directory search string */
if (strncmp(".../", start, 4) != 0) {
(void)Dir_AddDir(defIncPath, start);
} else {
if (Dir_FindHereOrAbove(curdir, start+4,
found_path, sizeof(found_path))) {
(void)Dir_AddDir(defIncPath, found_path);
}
}
}
if (syspath != defsyspath)
free(syspath);
/*
* Read in the built-in rules first, followed by the specified
* makefile, if it was (makefile != NULL), or the default
* makefile and Makefile, in that order, if it wasn't.
*/
if (!noBuiltins) {
LstNode ln;
sysMkPath = Lst_Init(FALSE);
Dir_Expand(_PATH_DEFSYSMK,
Lst_IsEmpty(sysIncPath) ? defIncPath : sysIncPath,
sysMkPath);
if (Lst_IsEmpty(sysMkPath))
Fatal("%s: no system rules (%s).", progname,
_PATH_DEFSYSMK);
ln = Lst_Find(sysMkPath, NULL, ReadMakefile);
if (ln == NULL)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
}
if (!Lst_IsEmpty(makefiles)) {
LstNode ln;
ln = Lst_Find(makefiles, NULL, ReadAllMakefiles);
if (ln != NULL)
Fatal("%s: cannot open %s.", progname,
(char *)Lst_Datum(ln));
} else {
p1 = Var_Subst(NULL, "${" MAKEFILE_PREFERENCE "}",
VAR_CMD, 0);
if (p1) {
(void)str2Lst_Append(makefiles, p1, NULL);
(void)Lst_Find(makefiles, NULL, ReadMakefile);
free(p1);
}
}
/* In particular suppress .depend for '-r -V .OBJDIR -f /dev/null' */
if (!noBuiltins || !printVars) {
makeDependfile = Var_Subst(NULL, "${.MAKE.DEPENDFILE:T}",
VAR_CMD, 0);
doing_depend = TRUE;
(void)ReadMakefile(makeDependfile, NULL);
doing_depend = FALSE;
}
MakeMode(NULL);
Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL);
if (p1)
free(p1);
if (!compatMake)
Job_ServerStart(maxJobTokens, jp_0, jp_1);
if (DEBUG(JOB))
fprintf(debug_file, "job_pipe %d %d, maxjobs %d, tokens %d, compat %d\n",
jp_0, jp_1, maxJobs, maxJobTokens, compatMake);
Main_ExportMAKEFLAGS(TRUE); /* initial export */
Check_Cwd_av(0, NULL, 0); /* initialize it */
/*
* For compatibility, look at the directories in the VPATH variable
* and add them to the search path, if the variable is defined. The
* variable's value is in the same format as the PATH envariable, i.e.
* <directory>:<directory>:<directory>...
*/
if (Var_Exists("VPATH", VAR_CMD)) {
char *vpath, savec;
/*
* GCC stores string constants in read-only memory, but
* Var_Subst will want to write this thing, so store it
* in an array
*/
static char VPATH[] = "${VPATH}";
vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE);
path = vpath;
do {
/* skip to end of directory */
for (cp = path; *cp != ':' && *cp != '\0'; cp++)
continue;
/* Save terminator character so know when to stop */
savec = *cp;
*cp = '\0';
/* Add directory to search path */
(void)Dir_AddDir(dirSearchPath, path);
*cp = savec;
path = cp + 1;
} while (savec == ':');
free(vpath);
}
/*
* Now that all search paths have been read for suffixes et al, it's
* time to add the default search path to their lists...
*/
Suff_DoPaths();
/*
* Propagate attributes through :: dependency lists.
*/
Targ_Propagate();
/* print the initial graph, if the user requested it */
if (DEBUG(GRAPH1))
Targ_PrintGraph(1);
/* print the values of any variables requested by the user */
if (printVars) {
LstNode ln;
for (ln = Lst_First(variables); ln != NULL;
ln = Lst_Succ(ln)) {
char *var = (char *)Lst_Datum(ln);
char *value;
if (strchr(var, '$')) {
value = p1 = Var_Subst(NULL, var, VAR_GLOBAL, 0);
} else {
value = Var_Value(var, VAR_GLOBAL, &p1);
}
printf("%s\n", value ? value : "");
if (p1)
free(p1);
}
} else {
/*
* Have now read the entire graph and need to make a list of
* targets to create. If none was given on the command line,
* we consult the parsing module to find the main target(s)
* to create.
*/
if (Lst_IsEmpty(create))
targs = Parse_MainName();
else
targs = Targ_FindList(create, TARG_CREATE);
if (!compatMake) {
/*
* Initialize job module before traversing the graph
* now that any .BEGIN and .END targets have been read.
* This is done only if the -q flag wasn't given
* (to prevent the .BEGIN from being executed should
* it exist).
*/
if (!queryFlag) {
Job_Init();
jobsRunning = TRUE;
}
/* Traverse the graph, checking on all the targets */
outOfDate = Make_Run(targs);
} else {
/*
* Compat_Init will take care of creating all the
* targets as well as initializing the module.
*/
Compat_Run(targs);
}
}
#ifdef CLEANUP
Lst_Destroy(targs, NULL);
Lst_Destroy(variables, NULL);
Lst_Destroy(makefiles, NULL);
Lst_Destroy(create, (FreeProc *)free);
#endif
/* print the graph now it's been processed if the user requested it */
if (DEBUG(GRAPH2))
Targ_PrintGraph(2);
Trace_Log(MAKEEND, 0);
Suff_End();
Targ_End();
Arch_End();
Var_End();
Parse_End();
Dir_End();
Job_End();
Trace_End();
return outOfDate ? 1 : 0;
}
