909 lines
28 KiB
C
909 lines
28 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)make.c 8.1 (Berkeley) 6/6/93
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*-
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* make.c --
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* The functions which perform the examination of targets and
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* their suitability for creation
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*
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* Interface:
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* Make_Run Initialize things for the module and recreate
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* whatever needs recreating. Returns TRUE if
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* work was (or would have been) done and FALSE
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* otherwise.
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*
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* Make_Update Update all parents of a given child. Performs
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* various bookkeeping chores like the updating
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* of the cmtime field of the parent, filling
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* of the IMPSRC context variable, etc. It will
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* place the parent on the toBeMade queue if it
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* should be.
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*
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* Make_TimeStamp Function to set the parent's cmtime field
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* based on a child's modification time.
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*
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* Make_DoAllVar Set up the various local variables for a
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* target, including the .ALLSRC variable, making
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* sure that any variable that needs to exist
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* at the very least has the empty value.
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*
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* Make_OODate Determine if a target is out-of-date.
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*
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* Make_HandleUse See if a child is a .USE node for a parent
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* and perform the .USE actions if so.
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*/
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#include "make.h"
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#include "hash.h"
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#include "dir.h"
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#include "job.h"
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static Lst toBeMade; /* The current fringe of the graph. These
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* are nodes which await examination by
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* MakeOODate. It is added to by
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* Make_Update and subtracted from by
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* MakeStartJobs */
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static int numNodes; /* Number of nodes to be processed. If this
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* is non-zero when Job_Empty() returns
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* TRUE, there's a cycle in the graph */
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static int MakeAddChild(void *, void *);
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static int MakeAddAllSrc(void *, void *);
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static int MakeTimeStamp(void *, void *);
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static int MakeHandleUse(void *, void *);
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static Boolean MakeStartJobs(void);
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static int MakePrintStatus(void *, void *);
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/*-
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*-----------------------------------------------------------------------
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* Make_TimeStamp --
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* Set the cmtime field of a parent node based on the mtime stamp in its
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* child. Called from MakeOODate via Lst_ForEach.
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*
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* Results:
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* Always returns 0.
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*
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* Side Effects:
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* The cmtime of the parent node will be changed if the mtime
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* field of the child is greater than it.
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*-----------------------------------------------------------------------
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*/
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int
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Make_TimeStamp (pgn, cgn)
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GNode *pgn; /* the current parent */
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GNode *cgn; /* the child we've just examined */
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{
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if (cgn->mtime > pgn->cmtime) {
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pgn->cmtime = cgn->mtime;
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}
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return (0);
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}
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static int
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MakeTimeStamp (pgn, cgn)
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void * pgn; /* the current parent */
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void * cgn; /* the child we've just examined */
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{
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return Make_TimeStamp((GNode *) pgn, (GNode *) cgn);
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}
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/*-
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*-----------------------------------------------------------------------
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* Make_OODate --
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* See if a given node is out of date with respect to its sources.
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* Used by Make_Run when deciding which nodes to place on the
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* toBeMade queue initially and by Make_Update to screen out USE and
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* EXEC nodes. In the latter case, however, any other sort of node
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* must be considered out-of-date since at least one of its children
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* will have been recreated.
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*
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* Results:
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* TRUE if the node is out of date. FALSE otherwise.
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*
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* Side Effects:
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* The mtime field of the node and the cmtime field of its parents
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* will/may be changed.
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*-----------------------------------------------------------------------
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*/
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Boolean
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Make_OODate (gn)
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GNode *gn; /* the node to check */
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{
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Boolean oodate;
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/*
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* Certain types of targets needn't even be sought as their datedness
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* doesn't depend on their modification time...
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*/
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if ((gn->type & (OP_JOIN|OP_USE|OP_EXEC)) == 0) {
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(void) Dir_MTime (gn);
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if (DEBUG(MAKE)) {
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if (gn->mtime != 0) {
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printf ("modified %s...", Targ_FmtTime(gn->mtime));
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} else {
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printf ("non-existent...");
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}
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}
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}
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/*
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* A target is remade in one of the following circumstances:
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* its modification time is smaller than that of its youngest child
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* and it would actually be run (has commands or type OP_NOP)
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* it's the object of a force operator
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* it has no children, was on the lhs of an operator and doesn't exist
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* already.
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*
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* Libraries are only considered out-of-date if the archive module says
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* they are.
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*
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* These weird rules are brought to you by Backward-Compatability and
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* the strange people who wrote 'Make'.
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*/
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if (gn->type & OP_USE) {
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/*
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* If the node is a USE node it is *never* out of date
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* no matter *what*.
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*/
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if (DEBUG(MAKE)) {
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printf(".USE node...");
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}
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oodate = FALSE;
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} else if (gn->type & OP_LIB) {
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if (DEBUG(MAKE)) {
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printf("library...");
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}
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/*
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* always out of date if no children and :: target
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*/
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oodate = Arch_LibOODate (gn) ||
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((gn->cmtime == 0) && (gn->type & OP_DOUBLEDEP));
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} else if (gn->type & OP_JOIN) {
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/*
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* A target with the .JOIN attribute is only considered
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* out-of-date if any of its children was out-of-date.
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*/
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if (DEBUG(MAKE)) {
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printf(".JOIN node...");
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}
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oodate = gn->childMade;
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} else if (gn->type & (OP_FORCE|OP_EXEC|OP_PHONY)) {
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/*
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* A node which is the object of the force (!) operator or which has
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* the .EXEC attribute is always considered out-of-date.
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*/
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if (DEBUG(MAKE)) {
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if (gn->type & OP_FORCE) {
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printf("! operator...");
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} else if (gn->type & OP_PHONY) {
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printf(".PHONY node...");
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} else {
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printf(".EXEC node...");
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}
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}
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oodate = TRUE;
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} else if ((gn->mtime < gn->cmtime) ||
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((gn->cmtime == 0) &&
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((gn->mtime==0) || (gn->type & OP_DOUBLEDEP))))
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{
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/*
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* A node whose modification time is less than that of its
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* youngest child or that has no children (cmtime == 0) and
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* either doesn't exist (mtime == 0) or was the object of a
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* :: operator is out-of-date. Why? Because that's the way Make does
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* it.
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*/
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if (DEBUG(MAKE)) {
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if (gn->mtime < gn->cmtime) {
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printf("modified before source...");
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} else if (gn->mtime == 0) {
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printf("non-existent and no sources...");
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} else {
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printf(":: operator and no sources...");
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}
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}
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oodate = TRUE;
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} else {
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#if 0
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/* WHY? */
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if (DEBUG(MAKE)) {
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printf("source %smade...", gn->childMade ? "" : "not ");
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}
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oodate = gn->childMade;
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#else
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oodate = FALSE;
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#endif /* 0 */
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}
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/*
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* If the target isn't out-of-date, the parents need to know its
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* modification time. Note that targets that appear to be out-of-date
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* but aren't, because they have no commands and aren't of type OP_NOP,
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* have their mtime stay below their children's mtime to keep parents from
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* thinking they're out-of-date.
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*/
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if (!oodate) {
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Lst_ForEach (gn->parents, MakeTimeStamp, (void *)gn);
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}
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return (oodate);
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}
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/*-
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*-----------------------------------------------------------------------
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* MakeAddChild --
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* Function used by Make_Run to add a child to the list l.
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* It will only add the child if its make field is FALSE.
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*
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* Results:
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* Always returns 0
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*
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* Side Effects:
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* The given list is extended
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*-----------------------------------------------------------------------
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*/
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static int
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MakeAddChild (gnp, lp)
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void * gnp; /* the node to add */
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void * lp; /* the list to which to add it */
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{
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GNode *gn = (GNode *) gnp;
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Lst l = (Lst) lp;
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if (!gn->make && !(gn->type & OP_USE)) {
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(void)Lst_EnQueue (l, (void *)gn);
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}
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return (0);
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}
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/*-
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*-----------------------------------------------------------------------
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* Make_HandleUse --
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* Function called by Make_Run and SuffApplyTransform on the downward
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* pass to handle .USE and transformation nodes. A callback function
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* for Lst_ForEach, it implements the .USE and transformation
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* functionality by copying the node's commands, type flags
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* and children to the parent node. Should be called before the
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* children are enqueued to be looked at by MakeAddChild.
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*
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* A .USE node is much like an explicit transformation rule, except
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* its commands are always added to the target node, even if the
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* target already has commands.
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*
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* Results:
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* returns 0.
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*
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* Side Effects:
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* Children and commands may be added to the parent and the parent's
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* type may be changed.
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*
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*-----------------------------------------------------------------------
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*/
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int
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Make_HandleUse (cgn, pgn)
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GNode *cgn; /* The .USE node */
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GNode *pgn; /* The target of the .USE node */
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{
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GNode *gn; /* A child of the .USE node */
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LstNode ln; /* An element in the children list */
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if (cgn->type & (OP_USE|OP_TRANSFORM)) {
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if ((cgn->type & OP_USE) || Lst_IsEmpty(pgn->commands)) {
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/*
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* .USE or transformation and target has no commands -- append
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* the child's commands to the parent.
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*/
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(void) Lst_Concat (pgn->commands, cgn->commands, LST_CONCNEW);
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}
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if (Lst_Open (cgn->children) == SUCCESS) {
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while ((ln = Lst_Next (cgn->children)) != NULL) {
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gn = (GNode *)Lst_Datum (ln);
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if (Lst_Member (pgn->children, gn) == NULL) {
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(void) Lst_AtEnd (pgn->children, gn);
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(void) Lst_AtEnd (gn->parents, pgn);
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pgn->unmade += 1;
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}
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}
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Lst_Close (cgn->children);
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}
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pgn->type |= cgn->type & ~(OP_OPMASK|OP_USE|OP_TRANSFORM);
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/*
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* This child node is now "made", so we decrement the count of
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* unmade children in the parent... We also remove the child
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* from the parent's list to accurately reflect the number of decent
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* children the parent has. This is used by Make_Run to decide
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* whether to queue the parent or examine its children...
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*/
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if (cgn->type & OP_USE) {
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pgn->unmade--;
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}
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}
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return (0);
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}
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static int
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MakeHandleUse (pgn, cgn)
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void * pgn; /* the current parent */
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void * cgn; /* the child we've just examined */
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{
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return Make_HandleUse((GNode *) pgn, (GNode *) cgn);
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}
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/*-
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*-----------------------------------------------------------------------
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* Make_Update --
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* Perform update on the parents of a node. Used by JobFinish once
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* a node has been dealt with and by MakeStartJobs if it finds an
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* up-to-date node.
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*
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* Results:
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* Always returns 0
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*
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* Side Effects:
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* The unmade field of pgn is decremented and pgn may be placed on
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* the toBeMade queue if this field becomes 0.
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*
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* If the child was made, the parent's childMade field will be set true
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* and its cmtime set to now.
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*
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* If the child wasn't made, the cmtime field of the parent will be
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* altered if the child's mtime is big enough.
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*
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* Finally, if the child is the implied source for the parent, the
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* parent's IMPSRC variable is set appropriately.
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*
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*-----------------------------------------------------------------------
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*/
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void
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Make_Update (cgn)
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GNode *cgn; /* the child node */
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{
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GNode *pgn; /* the parent node */
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char *cname; /* the child's name */
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LstNode ln; /* Element in parents and iParents lists */
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char *p1;
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cname = Var_Value (TARGET, cgn, &p1);
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efree(p1);
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/*
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* If the child was actually made, see what its modification time is
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* now -- some rules won't actually update the file. If the file still
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* doesn't exist, make its mtime now.
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*/
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if (cgn->made != UPTODATE) {
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#ifndef RECHECK
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/*
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* We can't re-stat the thing, but we can at least take care of rules
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* where a target depends on a source that actually creates the
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* target, but only if it has changed, e.g.
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*
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* parse.h : parse.o
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*
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* parse.o : parse.y
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* yacc -d parse.y
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* cc -c y.tab.c
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* mv y.tab.o parse.o
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* cmp -s y.tab.h parse.h || mv y.tab.h parse.h
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*
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* In this case, if the definitions produced by yacc haven't changed
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* from before, parse.h won't have been updated and cgn->mtime will
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* reflect the current modification time for parse.h. This is
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* something of a kludge, I admit, but it's a useful one..
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* XXX: People like to use a rule like
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*
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* FRC:
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*
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* To force things that depend on FRC to be made, so we have to
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* check for gn->children being empty as well...
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*/
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if (!Lst_IsEmpty(cgn->commands) || Lst_IsEmpty(cgn->children)) {
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cgn->mtime = now;
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}
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#else
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/*
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* This is what Make does and it's actually a good thing, as it
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* allows rules like
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*
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* cmp -s y.tab.h parse.h || cp y.tab.h parse.h
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*
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* to function as intended. Unfortunately, thanks to the stateless
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* nature of NFS (by which I mean the loose coupling of two clients
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* using the same file from a common server), there are times
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* when the modification time of a file created on a remote
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* machine will not be modified before the local stat() implied by
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* the Dir_MTime occurs, thus leading us to believe that the file
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* is unchanged, wreaking havoc with files that depend on this one.
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*
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* I have decided it is better to make too much than to make too
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* little, so this stuff is commented out unless you're sure it's ok.
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* -- ardeb 1/12/88
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*/
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/*
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* Christos, 4/9/92: If we are saving commands pretend that
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* the target is made now. Otherwise archives with ... rules
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* don't work!
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*/
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if (noExecute || (cgn->type & OP_SAVE_CMDS) || Dir_MTime(cgn) == 0) {
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cgn->mtime = now;
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}
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if (DEBUG(MAKE)) {
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printf("update time: %s\n", Targ_FmtTime(cgn->mtime));
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}
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#endif
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}
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if (Lst_Open (cgn->parents) == SUCCESS) {
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while ((ln = Lst_Next (cgn->parents)) != NULL) {
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pgn = (GNode *)Lst_Datum (ln);
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if (pgn->make) {
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pgn->unmade -= 1;
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if ( ! (cgn->type & (OP_EXEC|OP_USE))) {
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if (cgn->made == MADE) {
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pgn->childMade = TRUE;
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if (pgn->cmtime < cgn->mtime) {
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pgn->cmtime = cgn->mtime;
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}
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} else {
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(void)Make_TimeStamp (pgn, cgn);
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}
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}
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if (pgn->unmade == 0) {
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/*
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* Queue the node up -- any unmade predecessors will
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* be dealt with in MakeStartJobs.
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*/
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(void)Lst_EnQueue (toBeMade, (void *)pgn);
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} else if (pgn->unmade < 0) {
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Error ("Graph cycles through %s", pgn->name);
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}
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}
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}
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Lst_Close (cgn->parents);
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}
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/*
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* Deal with successor nodes. If any is marked for making and has an unmade
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* count of 0, has not been made and isn't in the examination queue,
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* it means we need to place it in the queue as it restrained itself
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* before.
|
||
*/
|
||
for (ln = Lst_First(cgn->successors); ln != NULL; ln = Lst_Succ(ln)) {
|
||
GNode *succ = (GNode *)Lst_Datum(ln);
|
||
|
||
if (succ->make && succ->unmade == 0 && succ->made == UNMADE &&
|
||
Lst_Member(toBeMade, (void *)succ) == NULL)
|
||
{
|
||
(void)Lst_EnQueue(toBeMade, (void *)succ);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Set the .PREFIX and .IMPSRC variables for all the implied parents
|
||
* of this node.
|
||
*/
|
||
if (Lst_Open (cgn->iParents) == SUCCESS) {
|
||
char *p1;
|
||
char *cpref = Var_Value(PREFIX, cgn, &p1);
|
||
|
||
while ((ln = Lst_Next (cgn->iParents)) != NULL) {
|
||
pgn = (GNode *)Lst_Datum (ln);
|
||
if (pgn->make) {
|
||
Var_Set (IMPSRC, cname, pgn);
|
||
Var_Set (PREFIX, cpref, pgn);
|
||
}
|
||
}
|
||
efree(p1);
|
||
Lst_Close (cgn->iParents);
|
||
}
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* MakeAddAllSrc --
|
||
* Add a child's name to the ALLSRC and OODATE variables of the given
|
||
* node. Called from Make_DoAllVar via Lst_ForEach. A child is added only
|
||
* if it has not been given the .EXEC, .USE or .INVISIBLE attributes.
|
||
* .EXEC and .USE children are very rarely going to be files, so...
|
||
* A child is added to the OODATE variable if its modification time is
|
||
* later than that of its parent, as defined by Make, except if the
|
||
* parent is a .JOIN node. In that case, it is only added to the OODATE
|
||
* variable if it was actually made (since .JOIN nodes don't have
|
||
* modification times, the comparison is rather unfair...)..
|
||
*
|
||
* Results:
|
||
* Always returns 0
|
||
*
|
||
* Side Effects:
|
||
* The ALLSRC variable for the given node is extended.
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
static int
|
||
MakeAddAllSrc (cgnp, pgnp)
|
||
void * cgnp; /* The child to add */
|
||
void * pgnp; /* The parent to whose ALLSRC variable it should be */
|
||
/* added */
|
||
{
|
||
GNode *cgn = (GNode *) cgnp;
|
||
GNode *pgn = (GNode *) pgnp;
|
||
if ((cgn->type & (OP_EXEC|OP_USE|OP_INVISIBLE)) == 0) {
|
||
char *child;
|
||
char *p1 = NULL;
|
||
|
||
if (OP_NOP(cgn->type)) {
|
||
/*
|
||
* this node is only source; use the specific pathname for it
|
||
*/
|
||
child = cgn->path ? cgn->path : cgn->name;
|
||
}
|
||
else
|
||
child = Var_Value(TARGET, cgn, &p1);
|
||
Var_Append (ALLSRC, child, pgn);
|
||
if (pgn->type & OP_JOIN) {
|
||
if (cgn->made == MADE) {
|
||
Var_Append(OODATE, child, pgn);
|
||
}
|
||
} else if ((pgn->mtime < cgn->mtime) ||
|
||
(cgn->mtime >= now && cgn->made == MADE))
|
||
{
|
||
/*
|
||
* It goes in the OODATE variable if the parent is younger than the
|
||
* child or if the child has been modified more recently than
|
||
* the start of the make. This is to keep pmake from getting
|
||
* confused if something else updates the parent after the
|
||
* make starts (shouldn't happen, I know, but sometimes it
|
||
* does). In such a case, if we've updated the kid, the parent
|
||
* is likely to have a modification time later than that of
|
||
* the kid and anything that relies on the OODATE variable will
|
||
* be hosed.
|
||
*
|
||
* XXX: This will cause all made children to go in the OODATE
|
||
* variable, even if they're not touched, if RECHECK isn't defined,
|
||
* since cgn->mtime is set to now in Make_Update. According to
|
||
* some people, this is good...
|
||
*/
|
||
Var_Append(OODATE, child, pgn);
|
||
}
|
||
efree(p1);
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* Make_DoAllVar --
|
||
* Set up the ALLSRC and OODATE variables. Sad to say, it must be
|
||
* done separately, rather than while traversing the graph. This is
|
||
* because Make defined OODATE to contain all sources whose modification
|
||
* times were later than that of the target, *not* those sources that
|
||
* were out-of-date. Since in both compatibility and native modes,
|
||
* the modification time of the parent isn't found until the child
|
||
* has been dealt with, we have to wait until now to fill in the
|
||
* variable. As for ALLSRC, the ordering is important and not
|
||
* guaranteed when in native mode, so it must be set here, too.
|
||
*
|
||
* Results:
|
||
* None
|
||
*
|
||
* Side Effects:
|
||
* The ALLSRC and OODATE variables of the given node is filled in.
|
||
* If the node is a .JOIN node, its TARGET variable will be set to
|
||
* match its ALLSRC variable.
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
void
|
||
Make_DoAllVar (gn)
|
||
GNode *gn;
|
||
{
|
||
Lst_ForEach (gn->children, MakeAddAllSrc, (void *) gn);
|
||
|
||
if (!Var_Exists (OODATE, gn)) {
|
||
Var_Set (OODATE, "", gn);
|
||
}
|
||
if (!Var_Exists (ALLSRC, gn)) {
|
||
Var_Set (ALLSRC, "", gn);
|
||
}
|
||
|
||
if (gn->type & OP_JOIN) {
|
||
char *p1;
|
||
Var_Set (TARGET, Var_Value (ALLSRC, gn, &p1), gn);
|
||
efree(p1);
|
||
}
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* MakeStartJobs --
|
||
* Start as many jobs as possible.
|
||
*
|
||
* Results:
|
||
* If the query flag was given to pmake, no job will be started,
|
||
* but as soon as an out-of-date target is found, this function
|
||
* returns TRUE. At all other times, this function returns FALSE.
|
||
*
|
||
* Side Effects:
|
||
* Nodes are removed from the toBeMade queue and job table slots
|
||
* are filled.
|
||
*
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
static Boolean
|
||
MakeStartJobs ()
|
||
{
|
||
GNode *gn;
|
||
|
||
while (!Job_Full() && !Lst_IsEmpty (toBeMade)) {
|
||
gn = (GNode *) Lst_DeQueue (toBeMade);
|
||
if (DEBUG(MAKE)) {
|
||
printf ("Examining %s...", gn->name);
|
||
}
|
||
/*
|
||
* Make sure any and all predecessors that are going to be made,
|
||
* have been.
|
||
*/
|
||
if (!Lst_IsEmpty(gn->preds)) {
|
||
LstNode ln;
|
||
|
||
for (ln = Lst_First(gn->preds); ln != NULL; ln = Lst_Succ(ln)){
|
||
GNode *pgn = (GNode *)Lst_Datum(ln);
|
||
|
||
if (pgn->make && pgn->made == UNMADE) {
|
||
if (DEBUG(MAKE)) {
|
||
printf("predecessor %s not made yet.\n", pgn->name);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
/*
|
||
* If ln isn't NULL, there's a predecessor as yet unmade, so we
|
||
* just drop this node on the floor. When the node in question
|
||
* has been made, it will notice this node as being ready to
|
||
* make but as yet unmade and will place the node on the queue.
|
||
*/
|
||
if (ln != NULL) {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
numNodes--;
|
||
if (Make_OODate (gn)) {
|
||
if (DEBUG(MAKE)) {
|
||
printf ("out-of-date\n");
|
||
}
|
||
if (queryFlag) {
|
||
return (TRUE);
|
||
}
|
||
Make_DoAllVar (gn);
|
||
Job_Make (gn);
|
||
} else {
|
||
if (DEBUG(MAKE)) {
|
||
printf ("up-to-date\n");
|
||
}
|
||
gn->made = UPTODATE;
|
||
if (gn->type & OP_JOIN) {
|
||
/*
|
||
* Even for an up-to-date .JOIN node, we need it to have its
|
||
* context variables so references to it get the correct
|
||
* value for .TARGET when building up the context variables
|
||
* of its parent(s)...
|
||
*/
|
||
Make_DoAllVar (gn);
|
||
}
|
||
|
||
Make_Update (gn);
|
||
}
|
||
}
|
||
return (FALSE);
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* MakePrintStatus --
|
||
* Print the status of a top-level node, viz. it being up-to-date
|
||
* already or not created due to an error in a lower level.
|
||
* Callback function for Make_Run via Lst_ForEach.
|
||
*
|
||
* Results:
|
||
* Always returns 0.
|
||
*
|
||
* Side Effects:
|
||
* A message may be printed.
|
||
*
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
static int
|
||
MakePrintStatus(gnp, cyclep)
|
||
void * gnp; /* Node to examine */
|
||
void * cyclep; /* True if gn->unmade being non-zero implies
|
||
* a cycle in the graph, not an error in an
|
||
* inferior */
|
||
{
|
||
GNode *gn = (GNode *) gnp;
|
||
Boolean cycle = *(Boolean *) cyclep;
|
||
if (gn->made == UPTODATE) {
|
||
printf ("`%s' is up to date.\n", gn->name);
|
||
} else if (gn->unmade != 0) {
|
||
if (cycle) {
|
||
Boolean t = TRUE;
|
||
/*
|
||
* If printing cycles and came to one that has unmade children,
|
||
* print out the cycle by recursing on its children. Note a
|
||
* cycle like:
|
||
* a : b
|
||
* b : c
|
||
* c : b
|
||
* will cause this to erroneously complain about a being in
|
||
* the cycle, but this is a good approximation.
|
||
*/
|
||
if (gn->made == CYCLE) {
|
||
Error("Graph cycles through `%s'", gn->name);
|
||
gn->made = ENDCYCLE;
|
||
Lst_ForEach(gn->children, MakePrintStatus, (void *) &t);
|
||
gn->made = UNMADE;
|
||
} else if (gn->made != ENDCYCLE) {
|
||
gn->made = CYCLE;
|
||
Lst_ForEach(gn->children, MakePrintStatus, (void *) &t);
|
||
}
|
||
} else {
|
||
printf ("`%s' not remade because of errors.\n", gn->name);
|
||
}
|
||
}
|
||
return (0);
|
||
}
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* Make_Run --
|
||
* Initialize the nodes to remake and the list of nodes which are
|
||
* ready to be made by doing a breadth-first traversal of the graph
|
||
* starting from the nodes in the given list. Once this traversal
|
||
* is finished, all the 'leaves' of the graph are in the toBeMade
|
||
* queue.
|
||
* Using this queue and the Job module, work back up the graph,
|
||
* calling on MakeStartJobs to keep the job table as full as
|
||
* possible.
|
||
*
|
||
* Results:
|
||
* TRUE if work was done. FALSE otherwise.
|
||
*
|
||
* Side Effects:
|
||
* The make field of all nodes involved in the creation of the given
|
||
* targets is set to 1. The toBeMade list is set to contain all the
|
||
* 'leaves' of these subgraphs.
|
||
*-----------------------------------------------------------------------
|
||
*/
|
||
Boolean
|
||
Make_Run (targs)
|
||
Lst targs; /* the initial list of targets */
|
||
{
|
||
GNode *gn; /* a temporary pointer */
|
||
Lst examine; /* List of targets to examine */
|
||
int errors; /* Number of errors the Job module reports */
|
||
|
||
toBeMade = Lst_Init (FALSE);
|
||
|
||
examine = Lst_Duplicate(targs, NOCOPY);
|
||
numNodes = 0;
|
||
|
||
/*
|
||
* Make an initial downward pass over the graph, marking nodes to be made
|
||
* as we go down. We call Suff_FindDeps to find where a node is and
|
||
* to get some children for it if it has none and also has no commands.
|
||
* If the node is a leaf, we stick it on the toBeMade queue to
|
||
* be looked at in a minute, otherwise we add its children to our queue
|
||
* and go on about our business.
|
||
*/
|
||
while (!Lst_IsEmpty (examine)) {
|
||
gn = (GNode *) Lst_DeQueue (examine);
|
||
|
||
if (!gn->make) {
|
||
gn->make = TRUE;
|
||
numNodes++;
|
||
|
||
/*
|
||
* Apply any .USE rules before looking for implicit dependencies
|
||
* to make sure everything has commands that should...
|
||
*/
|
||
Lst_ForEach (gn->children, MakeHandleUse, (void *)gn);
|
||
Suff_FindDeps (gn);
|
||
|
||
if (gn->unmade != 0) {
|
||
Lst_ForEach (gn->children, MakeAddChild, (void *)examine);
|
||
} else {
|
||
(void)Lst_EnQueue (toBeMade, (void *)gn);
|
||
}
|
||
}
|
||
}
|
||
|
||
Lst_Destroy (examine, NOFREE);
|
||
|
||
if (queryFlag) {
|
||
/*
|
||
* We wouldn't do any work unless we could start some jobs in the
|
||
* next loop... (we won't actually start any, of course, this is just
|
||
* to see if any of the targets was out of date)
|
||
*/
|
||
return (MakeStartJobs());
|
||
} else {
|
||
/*
|
||
* Initialization. At the moment, no jobs are running and until some
|
||
* get started, nothing will happen since the remaining upward
|
||
* traversal of the graph is performed by the routines in job.c upon
|
||
* the finishing of a job. So we fill the Job table as much as we can
|
||
* before going into our loop.
|
||
*/
|
||
(void) MakeStartJobs();
|
||
}
|
||
|
||
/*
|
||
* Main Loop: The idea here is that the ending of jobs will take
|
||
* care of the maintenance of data structures and the waiting for output
|
||
* will cause us to be idle most of the time while our children run as
|
||
* much as possible. Because the job table is kept as full as possible,
|
||
* the only time when it will be empty is when all the jobs which need
|
||
* running have been run, so that is the end condition of this loop.
|
||
* Note that the Job module will exit if there were any errors unless the
|
||
* keepgoing flag was given.
|
||
*/
|
||
while (!Job_Empty ()) {
|
||
Job_CatchOutput ();
|
||
Job_CatchChildren (!usePipes);
|
||
(void)MakeStartJobs();
|
||
}
|
||
|
||
errors = Job_Finish();
|
||
|
||
/*
|
||
* Print the final status of each target. E.g. if it wasn't made
|
||
* because some inferior reported an error.
|
||
*/
|
||
errors = ((errors == 0) && (numNodes != 0));
|
||
Lst_ForEach(targs, MakePrintStatus, (void *) &errors);
|
||
|
||
return (TRUE);
|
||
}
|