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+/*
+ * Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
+ *
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+/* This file is ALSO:
+ * Copyright 2001-2004 David Abrahams.
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+/*
+ * make1.c - execute command to bring targets up to date
+ *
+ * This module contains make1(), the entry point called by make() to
+ * recursively decend the dependency graph executing update actions as
+ * marked by make0().
+ *
+ * External routines:
+ *
+ * make1() - execute commands to update a TARGET and all of its dependencies.
+ *
+ * Internal routines, the recursive/asynchronous command executors:
+ *
+ * make1a() - recursively traverse dependency target tree, calling make1b().
+ * make1atail() - started processing all dependencies so go on to make1b().
+ * make1b() - when dependencies are up to date, build target with make1c().
+ * make1c() - launch target's next command, call parents' make1b() if none.
+ * make1d() - handle command execution completion and call back make1c().
+ *
+ * Internal support routines:
+ *
+ * make1cmds() - turn ACTIONS into CMDs, grouping, splitting, etc.
+ * make1list() - turn a list of targets into a LIST, for $(<) and $(>).
+ * make1settings() - for vars that get bound values, build up replacement lists.
+ * make1bind() - bind targets that weren't bound in dependency analysis.
+ *
+ * 04/16/94 (seiwald) - Split from make.c.
+ * 04/21/94 (seiwald) - Handle empty "updated" actions.
+ * 05/04/94 (seiwald) - async multiprocess (-j) support.
+ * 06/01/94 (seiwald) - new 'actions existing' does existing sources.
+ * 12/20/94 (seiwald) - NOTIME renamed NOTFILE.
+ * 01/19/95 (seiwald) - distinguish between CANTFIND/CANTMAKE targets.
+ * 01/22/94 (seiwald) - pass per-target JAMSHELL down to exec_cmd().
+ * 02/28/95 (seiwald) - Handle empty "existing" actions.
+ * 03/10/95 (seiwald) - Fancy counts.
+ */
+
+#include "jam.h"
+
+#include "lists.h"
+#include "parse.h"
+#include "assert.h"
+#include "variable.h"
+#include "rules.h"
+#include "headers.h"
+
+#include "search.h"
+#include "newstr.h"
+#include "make.h"
+#include "command.h"
+#include "execcmd.h"
+#include "compile.h"
+#include "output.h"
+
+#include <stdlib.h>
+
+#if ! defined(NT) || defined(__GNUC__)
+ #include <unistd.h> /* for unlink */
+#endif
+
+static CMD * make1cmds ( TARGET * );
+static LIST * make1list ( LIST *, TARGETS *, int flags );
+static SETTINGS * make1settings( LIST * vars );
+static void make1bind ( TARGET * );
+
+/* Ugly static - it is too hard to carry it through the callbacks. */
+
+static struct
+{
+ int failed;
+ int skipped;
+ int total;
+ int made;
+} counts[ 1 ] ;
+
+/* Target state - remove recursive calls by just keeping track of state target
+ * is in.
+ */
+typedef struct _state
+{
+ struct _state * prev; /* previous state on stack */
+ TARGET * t; /* current target */
+ TARGET * parent; /* parent argument necessary for make1a() */
+#define T_STATE_MAKE1A 0 /* make1a() should be called */
+#define T_STATE_MAKE1ATAIL 1 /* make1atail() should be called */
+#define T_STATE_MAKE1B 2 /* make1b() should be called */
+#define T_STATE_MAKE1C 3 /* make1c() should be called */
+#define T_STATE_MAKE1D 4 /* make1d() should be called */
+ int curstate; /* current state */
+ int status;
+} state;
+
+static void make1a ( state * );
+static void make1atail ( state * );
+static void make1b ( state * );
+static void make1c ( state * );
+static void make1d ( state * );
+static void make_closure( void * closure, int status, timing_info *, char *, char * );
+
+typedef struct _stack
+{
+ state * stack;
+} stack;
+
+static stack state_stack = { NULL };
+
+static state * state_freelist = NULL;
+
+
+static state * alloc_state()
+{
+ if ( state_freelist != NULL )
+ {
+ state * pState = state_freelist;
+ state_freelist = pState->prev;
+ memset( pState, 0, sizeof( state ) );
+ return pState;
+ }
+
+ return (state *)BJAM_MALLOC( sizeof( state ) );
+}
+
+
+static void free_state( state * pState )
+{
+ pState->prev = state_freelist;
+ state_freelist = pState;
+}
+
+
+static void clear_state_freelist()
+{
+ while ( state_freelist != NULL )
+ {
+ state * pState = state_freelist;
+ state_freelist = state_freelist->prev;
+ BJAM_FREE( pState );
+ }
+}
+
+
+static state * current_state( stack * pStack )
+{
+ return pStack->stack;
+}
+
+
+static void pop_state( stack * pStack )
+{
+ if ( pStack->stack != NULL )
+ {
+ state * pState = pStack->stack->prev;
+ free_state( pStack->stack );
+ pStack->stack = pState;
+ }
+}
+
+
+static state * push_state( stack * pStack, TARGET * t, TARGET * parent, int curstate )
+{
+ state * pState = alloc_state();
+
+ pState->t = t;
+ pState->parent = parent;
+ pState->prev = pStack->stack;
+ pState->curstate = curstate;
+
+ pStack->stack = pState;
+
+ return pStack->stack;
+}
+
+
+/*
+ * Pushes a stack onto another stack, effectively reversing the order.
+ */
+
+static void push_stack_on_stack( stack * pDest, stack * pSrc )
+{
+ while ( pSrc->stack != NULL )
+ {
+ state * pState = pSrc->stack;
+ pSrc->stack = pSrc->stack->prev;
+ pState->prev = pDest->stack;
+ pDest->stack = pState;
+ }
+}
+
+
+/*
+ * make1() - execute commands to update a TARGET and all of its dependencies.
+ */
+
+static int intr = 0;
+
+int make1( TARGET * t )
+{
+ state * pState;
+
+ memset( (char *)counts, 0, sizeof( *counts ) );
+
+ /* Recursively make the target and its dependencies. */
+ push_state( &state_stack, t, NULL, T_STATE_MAKE1A );
+
+ do
+ {
+ while ( ( pState = current_state( &state_stack ) ) != NULL )
+ {
+ if ( intr )
+ pop_state( &state_stack );
+
+ switch ( pState->curstate )
+ {
+ case T_STATE_MAKE1A : make1a ( pState ); break;
+ case T_STATE_MAKE1ATAIL: make1atail( pState ); break;
+ case T_STATE_MAKE1B : make1b ( pState ); break;
+ case T_STATE_MAKE1C : make1c ( pState ); break;
+ case T_STATE_MAKE1D : make1d ( pState ); break;
+ }
+ }
+ }
+ /* Wait for any outstanding commands to finish running. */
+ while ( exec_wait() );
+
+ clear_state_freelist();
+
+ /* Talk about it. */
+ if ( counts->failed )
+ printf( "...failed updating %d target%s...\n", counts->failed,
+ counts->failed > 1 ? "s" : "" );
+ if ( DEBUG_MAKE && counts->skipped )
+ printf( "...skipped %d target%s...\n", counts->skipped,
+ counts->skipped > 1 ? "s" : "" );
+ if ( DEBUG_MAKE && counts->made )
+ printf( "...updated %d target%s...\n", counts->made,
+ counts->made > 1 ? "s" : "" );
+
+ return counts->total != counts->made;
+}
+
+
+/*
+ * make1a() - recursively traverse target tree, calling make1b().
+ *
+ * Called to start processing a specified target. Does nothing if the target is
+ * already being processed or otherwise starts processing all of its
+ * dependencies. Once all of its dependencies have started being processed goes
+ * on and calls make1b() (actually does that indirectly via a helper
+ * make1atail() state).
+ */
+
+static void make1a( state * pState )
+{
+ TARGET * t = pState->t;
+ TARGETS * c;
+
+ /* If the parent is the first to try to build this target or this target is
+ * in the make1c() quagmire, arrange for the parent to be notified when this
+ * target is built.
+ */
+ if ( pState->parent )
+ switch ( pState->t->progress )
+ {
+ case T_MAKE_INIT:
+ case T_MAKE_ACTIVE:
+ case T_MAKE_RUNNING:
+ pState->t->parents = targetentry( pState->t->parents,
+ pState->parent );
+ ++pState->parent->asynccnt;
+ }
+
+ /* If this target is already being processed then do nothing. There is no
+ * need to start processing the same target all over again.
+ */
+ if ( pState->t->progress != T_MAKE_INIT )
+ {
+ pop_state( &state_stack );
+ return;
+ }
+
+ /* Asynccnt counts the dependencies preventing this target from proceeding
+ * to make1b() for actual building. We start off with a count of 1 to
+ * prevent anything from happening until we can notify all dependencies that
+ * they are needed. This 1 is accounted for when we call make1b() ourselves,
+ * below. Without this if a a dependency gets built before we finish
+ * processing all of our other dependencies our build might be triggerred
+ * prematurely.
+ */
+ pState->t->asynccnt = 1;
+
+ /* Add header nodes created during the building process. */
+ {
+ TARGETS * inc = 0;
+ for ( c = t->depends; c; c = c->next )
+ if ( c->target->rescanned && c->target->includes )
+ inc = targetentry( inc, c->target->includes );
+ t->depends = targetchain( t->depends, inc );
+ }
+
+ /* Guard against circular dependencies. */
+ pState->t->progress = T_MAKE_ONSTACK;
+
+ {
+ stack temp_stack = { NULL };
+ for ( c = t->depends; c && !intr; c = c->next )
+ push_state( &temp_stack, c->target, pState->t, T_STATE_MAKE1A );
+
+ /* Using stacks reverses the order of execution. Reverse it back. */
+ push_stack_on_stack( &state_stack, &temp_stack );
+ }
+
+ pState->curstate = T_STATE_MAKE1ATAIL;
+}
+
+
+/*
+ * make1atail() - started processing all dependencies so go on to make1b().
+ */
+
+static void make1atail( state * pState )
+{
+ pState->t->progress = T_MAKE_ACTIVE;
+ /* Now that all of our dependencies have bumped up our asynccnt we can
+ * remove our own internal bump added to prevent this target from being
+ * built before all of its dependencies start getting processed.
+ */
+ pState->curstate = T_STATE_MAKE1B;
+}
+
+
+/*
+ * make1b() - when dependencies are up to date, build target with make1c().
+ *
+ * Called after all dependencies have started being processed and after each of
+ * them finishes its processing. The target actually goes on to getting built in
+ * make1c() only after all of its dependencies have finished their processing.
+ */
+
+static void make1b( state * pState )
+{
+ TARGET * t = pState->t;
+ TARGETS * c;
+ TARGET * failed = 0;
+ char * failed_name = "dependencies";
+
+ /* If any dependencies are still outstanding, wait until they call make1b()
+ * to signal their completion.
+ */
+ if ( --pState->t->asynccnt )
+ {
+ pop_state( &state_stack );
+ return;
+ }
+
+ /* Try to aquire a semaphore. If it is locked, wait until the target that
+ * locked it is built and signal completition.
+ */
+#ifdef OPT_SEMAPHORE
+ if ( t->semaphore && t->semaphore->asynccnt )
+ {
+ /* Append 't' to the list of targets waiting on semaphore. */
+ t->semaphore->parents = targetentry( t->semaphore->parents, t );
+ t->asynccnt++;
+
+ if ( DEBUG_EXECCMD )
+ printf( "SEM: %s is busy, delaying launch of %s\n",
+ t->semaphore->name, t->name );
+ pop_state( &state_stack );
+ return;
+ }
+#endif
+
+ /* Now ready to build target 't', if dependencies built OK. */
+
+ /* Collect status from dependencies. */
+ for ( c = t->depends; c; c = c->next )
+ if ( c->target->status > t->status && !( c->target->flags & T_FLAG_NOCARE ) )
+ {
+ failed = c->target;
+ pState->t->status = c->target->status;
+ }
+ /* If an internal header node failed to build, we want to output the target
+ * that it failed on.
+ */
+ if ( failed )
+ {
+ failed_name = failed->flags & T_FLAG_INTERNAL
+ ? failed->failed
+ : failed->name;
+ }
+ t->failed = failed_name;
+
+ /* If actions for building any of the dependencies have failed, bail.
+ * Otherwise, execute all actions to make the current target.
+ */
+ if ( ( pState->t->status == EXEC_CMD_FAIL ) && pState->t->actions )
+ {
+ ++counts->skipped;
+ if ( ( pState->t->flags & ( T_FLAG_RMOLD | T_FLAG_NOTFILE ) ) == T_FLAG_RMOLD )
+ {
+ if ( !unlink( pState->t->boundname ) )
+ printf( "...removing outdated %s\n", pState->t->boundname );
+ }
+ else
+ printf( "...skipped %s for lack of %s...\n", pState->t->name, failed_name );
+ }
+
+ if ( pState->t->status == EXEC_CMD_OK )
+ switch ( pState->t->fate )
+ {
+ /* These are handled by the default case below now
+ case T_FATE_INIT:
+ case T_FATE_MAKING:
+ */
+
+ case T_FATE_STABLE:
+ case T_FATE_NEWER:
+ break;
+
+ case T_FATE_CANTFIND:
+ case T_FATE_CANTMAKE:
+ pState->t->status = EXEC_CMD_FAIL;
+ break;
+
+ case T_FATE_ISTMP:
+ if ( DEBUG_MAKE )
+ printf( "...using %s...\n", pState->t->name );
+ break;
+
+ case T_FATE_TOUCHED:
+ case T_FATE_MISSING:
+ case T_FATE_NEEDTMP:
+ case T_FATE_OUTDATED:
+ case T_FATE_UPDATE:
+ case T_FATE_REBUILD:
+ /* Prepare commands for executing actions scheduled for this target
+ * and then schedule transfer to make1c() state to proceed with
+ * executing the prepared commands. Commands have their embedded
+ * variables automatically expanded, including making use of any "on
+ * target" variables.
+ */
+ if ( pState->t->actions )
+ {
+ ++counts->total;
+ if ( DEBUG_MAKE && !( counts->total % 100 ) )
+ printf( "...on %dth target...\n", counts->total );
+
+ pState->t->cmds = (char *)make1cmds( pState->t );
+ /* Set the target's "progress" so that make1c() counts it among
+ * its successes/failures.
+ */
+ pState->t->progress = T_MAKE_RUNNING;
+ }
+ break;
+
+ /* All possible fates should have been accounted for by now. */
+ default:
+ printf( "ERROR: %s has bad fate %d", pState->t->name,
+ pState->t->fate );
+ abort();
+ }
+
+ /* Call make1c() to begin the execution of the chain of commands needed to
+ * build the target. If we are not going to build the target (due of
+ * dependency failures or no commands needing to be run) the chain will be
+ * empty and make1c() will directly signal the target's completion.
+ */
+
+#ifdef OPT_SEMAPHORE
+ /* If there is a semaphore, indicate that it is in use. */
+ if ( pState->t->semaphore )
+ {
+ ++pState->t->semaphore->asynccnt;
+ if ( DEBUG_EXECCMD )
+ printf( "SEM: %s now used by %s\n", pState->t->semaphore->name,
+ pState->t->name );
+ }
+#endif
+
+ pState->curstate = T_STATE_MAKE1C;
+}
+
+
+/*
+ * make1c() - launch target's next command, call parents' make1b() if none.
+ *
+ * If there are (more) commands to run to build this target (and we have not hit
+ * an error running earlier comands) we launch the command using exec_cmd(). If
+ * there are no more commands to run, we collect the status from all the actions
+ * and report our completion to all the parents.
+ */
+
+static void make1c( state * pState )
+{
+ CMD * cmd = (CMD *)pState->t->cmds;
+
+ if ( cmd && ( pState->t->status == EXEC_CMD_OK ) )
+ {
+ char * rule_name = 0;
+ char * target = 0;
+
+ if ( DEBUG_MAKEQ ||
+ ( !( cmd->rule->actions->flags & RULE_QUIETLY ) && DEBUG_MAKE ) )
+ {
+ rule_name = cmd->rule->name;
+ target = lol_get( &cmd->args, 0 )->string;
+ if ( globs.noexec )
+ out_action( rule_name, target, cmd->buf, "", "", EXIT_OK );
+ }
+
+ if ( globs.noexec )
+ {
+ pState->curstate = T_STATE_MAKE1D;
+ pState->status = EXEC_CMD_OK;
+ }
+ else
+ {
+ /* Pop state first because exec_cmd() could push state. */
+ pop_state( &state_stack );
+ exec_cmd( cmd->buf, make_closure, pState->t, cmd->shell, rule_name,
+ target );
+ }
+ }
+ else
+ {
+ TARGETS * c;
+ ACTIONS * actions;
+
+ /* Collect status from actions, and distribute it as well. */
+ for ( actions = pState->t->actions; actions; actions = actions->next )
+ if ( actions->action->status > pState->t->status )
+ pState->t->status = actions->action->status;
+ for ( actions = pState->t->actions; actions; actions = actions->next )
+ if ( pState->t->status > actions->action->status )
+ actions->action->status = pState->t->status;
+
+ /* Tally success/failure for those we tried to update. */
+ if ( pState->t->progress == T_MAKE_RUNNING )
+ switch ( pState->t->status )
+ {
+ case EXEC_CMD_OK : ++counts->made ; break;
+ case EXEC_CMD_FAIL: ++counts->failed; break;
+ }
+
+ /* Tell parents their dependency has been built. */
+ {
+ stack temp_stack = { NULL };
+ TARGET * t = pState->t;
+ TARGET * additional_includes = NULL;
+
+ t->progress = T_MAKE_DONE;
+
+ /* Target has been updated so rescan it for dependencies. */
+ if ( ( t->fate >= T_FATE_MISSING ) &&
+ ( t->status == EXEC_CMD_OK ) &&
+ !t->rescanned )
+ {
+ TARGET * target_to_rescan = t;
+ SETTINGS * s;
+
+ target_to_rescan->rescanned = 1;
+
+ if ( target_to_rescan->flags & T_FLAG_INTERNAL )
+ target_to_rescan = t->original_target;
+
+ /* Clean current includes. */
+ target_to_rescan->includes = 0;
+
+ s = copysettings( target_to_rescan->settings );
+ pushsettings( s );
+ headers( target_to_rescan );
+ popsettings( s );
+ freesettings( s );
+
+ if ( target_to_rescan->includes )
+ {
+ target_to_rescan->includes->rescanned = 1;
+ /* Tricky. The parents have already been processed, but they
+ * have not seen the internal node, because it was just
+ * created. We need to make the calls to make1a() that would
+ * have been made by the parents here, and also make sure
+ * all unprocessed parents will pick up the includes. We
+ * must make sure processing of the additional make1a()
+ * invocations is done before make1b() which means this
+ * target is built, otherwise the parent would be considered
+ * built before this make1a() processing has even started.
+ */
+ make0( target_to_rescan->includes, target_to_rescan->parents->target, 0, 0, 0 );
+ for ( c = target_to_rescan->parents; c; c = c->next )
+ c->target->depends = targetentry( c->target->depends,
+ target_to_rescan->includes );
+ /* Will be processed below. */
+ additional_includes = target_to_rescan->includes;
+ }
+ }
+
+ if ( additional_includes )
+ for ( c = t->parents; c; c = c->next )
+ push_state( &temp_stack, additional_includes, c->target, T_STATE_MAKE1A );
+
+ for ( c = t->parents; c; c = c->next )
+ push_state( &temp_stack, c->target, NULL, T_STATE_MAKE1B );
+
+#ifdef OPT_SEMAPHORE
+ /* If there is a semaphore, it is now free. */
+ if ( t->semaphore )
+ {
+ assert( t->semaphore->asynccnt == 1 );
+ --t->semaphore->asynccnt;
+
+ if ( DEBUG_EXECCMD )
+ printf( "SEM: %s is now free\n", t->semaphore->name );
+
+ /* If anything is waiting, notify the next target. There is no
+ * point in notifying waiting targets, since they will be
+ * notified again.
+ */
+ if ( t->semaphore->parents )
+ {
+ TARGETS * first = t->semaphore->parents;
+ if ( first->next )
+ first->next->tail = first->tail;
+ t->semaphore->parents = first->next;
+
+ if ( DEBUG_EXECCMD )
+ printf( "SEM: placing %s on stack\n", first->target->name );
+ push_state( &temp_stack, first->target, NULL, T_STATE_MAKE1B );
+ BJAM_FREE( first );
+ }
+ }
+#endif
+
+ /* Must pop state before pushing any more. */
+ pop_state( &state_stack );
+
+ /* Using stacks reverses the order of execution. Reverse it back. */
+ push_stack_on_stack( &state_stack, &temp_stack );
+ }
+ }
+}
+
+
+/*
+ * call_timing_rule() - Look up the __TIMING_RULE__ variable on the given
+ * target, and if non-empty, invoke the rule it names, passing the given
+ * timing_info.
+ */
+
+static void call_timing_rule( TARGET * target, timing_info * time )
+{
+ LIST * timing_rule;
+
+ pushsettings( target->settings );
+ timing_rule = var_get( "__TIMING_RULE__" );
+ popsettings( target->settings );
+
+ if ( timing_rule )
+ {
+ /* rule timing-rule ( args * : target : start end user system ) */
+
+ /* Prepare the argument list. */
+ FRAME frame[ 1 ];
+ frame_init( frame );
+
+ /* args * :: $(__TIMING_RULE__[2-]) */
+ lol_add( frame->args, list_copy( L0, timing_rule->next ) );
+
+ /* target :: the name of the target */
+ lol_add( frame->args, list_new( L0, target->name ) );
+
+ /* start end user system :: info about the action command */
+ lol_add( frame->args, list_new( list_new( list_new( list_new( L0,
+ outf_time ( time->start ) ),
+ outf_time ( time->end ) ),
+ outf_double( time->user ) ),
+ outf_double( time->system ) ) );
+
+ /* Call the rule. */
+ evaluate_rule( timing_rule->string, frame );
+
+ /* Clean up. */
+ frame_free( frame );
+ }
+}
+
+
+/*
+ * call_action_rule() - Look up the __ACTION_RULE__ variable on the given
+ * target, and if non-empty, invoke the rule it names, passing the given info,
+ * timing_info, executed command and command output.
+ */
+
+static void call_action_rule
+(
+ TARGET * target,
+ int status,
+ timing_info * time,
+ char * executed_command,
+ char * command_output
+)
+{
+ LIST * action_rule;
+
+ pushsettings( target->settings );
+ action_rule = var_get( "__ACTION_RULE__" );
+ popsettings( target->settings );
+
+ if ( action_rule )
+ {
+ /* rule action-rule (
+ args * :
+ target :
+ command status start end user system :
+ output ? ) */
+
+ /* Prepare the argument list. */
+ FRAME frame[ 1 ];
+ frame_init( frame );
+
+ /* args * :: $(__ACTION_RULE__[2-]) */
+ lol_add( frame->args, list_copy( L0, action_rule->next ) );
+
+ /* target :: the name of the target */
+ lol_add( frame->args, list_new( L0, target->name ) );
+
+ /* command status start end user system :: info about the action command */
+ lol_add( frame->args,
+ list_new( list_new( list_new( list_new( list_new( list_new( L0,
+ newstr( executed_command ) ),
+ outf_int( status ) ),
+ outf_time( time->start ) ),
+ outf_time( time->end ) ),
+ outf_double( time->user ) ),
+ outf_double( time->system ) ) );
+
+ /* output ? :: the output of the action command */
+ if ( command_output )
+ lol_add( frame->args, list_new( L0, newstr( command_output ) ) );
+ else
+ lol_add( frame->args, L0 );
+
+ /* Call the rule. */
+ evaluate_rule( action_rule->string, frame );
+
+ /* Clean up. */
+ frame_free( frame );
+ }
+}
+
+
+/*
+ * make_closure() - internal function passed as a notification callback for when
+ * commands finish getting executed by the OS.
+ */
+
+static void make_closure
+(
+ void * closure,
+ int status,
+ timing_info * time,
+ char * executed_command,
+ char * command_output
+)
+{
+ TARGET * built = (TARGET *)closure;
+
+ call_timing_rule( built, time );
+ if ( DEBUG_EXECCMD )
+ printf( "%f sec system; %f sec user\n", time->system, time->user );
+
+ call_action_rule( built, status, time, executed_command, command_output );
+
+ push_state( &state_stack, built, NULL, T_STATE_MAKE1D )->status = status;
+}
+
+
+/*
+ * make1d() - handle command execution completion and call back make1c().
+ *
+ * exec_cmd() has completed and now all we need to do is fiddle with the status
+ * and call back to make1c() so it can run the next command scheduled for
+ * building this target or close up the target's build process in case there are
+ * no more commands scheduled for it. On interrupts, we bail heavily.
+ */
+
+static void make1d( state * pState )
+{
+ TARGET * t = pState->t;
+ CMD * cmd = (CMD *)t->cmds;
+ int status = pState->status;
+
+ if ( t->flags & T_FLAG_FAIL_EXPECTED )
+ {
+ /* Invert execution result when FAIL_EXPECTED has been applied. */
+ switch ( status )
+ {
+ case EXEC_CMD_FAIL: status = EXEC_CMD_OK ; break;
+ case EXEC_CMD_OK: status = EXEC_CMD_FAIL; break;
+ }
+ }
+
+ if ( ( status == EXEC_CMD_FAIL ) &&
+ ( cmd->rule->actions->flags & RULE_IGNORE ) )
+ status = EXEC_CMD_OK;
+
+ /* On interrupt, set intr so _everything_ fails. */
+ if ( status == EXEC_CMD_INTR )
+ ++intr;
+
+ /* Print command text on failure. */
+ if ( ( status == EXEC_CMD_FAIL ) && DEBUG_MAKE )
+ {
+ if ( !DEBUG_EXEC )
+ printf( "%s\n", cmd->buf );
+
+ printf( "...failed %s ", cmd->rule->name );
+ list_print( lol_get( &cmd->args, 0 ) );
+ printf( "...\n" );
+ }
+
+ /* Treat failed commands as interrupts in case we were asked to stop the
+ * build in case of any errors.
+ */
+ if ( ( status == EXEC_CMD_FAIL ) && globs.quitquick )
+ ++intr;
+
+ /* If the command was interrupted or failed and the target is not
+ * "precious", remove the targets.
+ */
+ if (status != EXEC_CMD_OK)
+ {
+ LIST * targets = lol_get( &cmd->args, 0 );
+ for ( ; targets; targets = list_next( targets ) )
+ {
+ int need_unlink = 1;
+ TARGET* t = bindtarget ( targets->string );
+ if (t->flags & T_FLAG_PRECIOUS)
+ {
+ need_unlink = 0;
+ }
+ if (need_unlink && !unlink( targets->string ) )
+ printf( "...removing %s\n", targets->string );
+ }
+ }
+
+ /* Free this command and call make1c() to move onto the next one scheduled
+ * for building this same target.
+ */
+ t->status = status;
+ t->cmds = (char *)cmd_next( cmd );
+ cmd_free( cmd );
+ pState->curstate = T_STATE_MAKE1C;
+}
+
+
+/*
+ * swap_settings() - replace the settings from the current module and target
+ * with those from the new module and target
+ */
+
+static void swap_settings
+(
+ module_t * * current_module,
+ TARGET * * current_target,
+ module_t * new_module,
+ TARGET * new_target
+)
+{
+ if ( new_module == root_module() )
+ new_module = 0;
+
+ if ( ( new_target == *current_target ) && ( new_module == *current_module ) )
+ return;
+
+ if ( *current_target )
+ popsettings( (*current_target)->settings );
+
+ if ( new_module != *current_module )
+ {
+ if ( *current_module )
+ exit_module( *current_module );
+
+ *current_module = new_module;
+
+ if ( new_module )
+ enter_module( new_module );
+ }
+
+ *current_target = new_target;
+ if ( new_target )
+ pushsettings( new_target->settings );
+}
+
+
+/*
+ * make1cmds() - turn ACTIONS into CMDs, grouping, splitting, etc.
+ *
+ * Essentially copies a chain of ACTIONs to a chain of CMDs, grouping
+ * RULE_TOGETHER actions, splitting RULE_PIECEMEAL actions, and handling
+ * RULE_NEWSRCS actions. The result is a chain of CMDs which can be expanded by
+ * var_string() and executed using exec_cmd().
+ */
+
+static CMD * make1cmds( TARGET * t )
+{
+ CMD * cmds = 0;
+ LIST * shell = 0;
+ module_t * settings_module = 0;
+ TARGET * settings_target = 0;
+ ACTIONS * a0;
+
+ /* Step through actions. Actions may be shared with other targets or grouped
+ * using RULE_TOGETHER, so actions already seen are skipped.
+ */
+ for ( a0 = t->actions ; a0; a0 = a0->next )
+ {
+ RULE * rule = a0->action->rule;
+ rule_actions * actions = rule->actions;
+ SETTINGS * boundvars;
+ LIST * nt;
+ LIST * ns;
+ ACTIONS * a1;
+ int start;
+ int chunk;
+ int length;
+
+ /* Only do rules with commands to execute. If this action has already
+ * been executed, use saved status.
+ */
+ if ( !actions || a0->action->running )
+ continue;
+
+ a0->action->running = 1;
+
+ /* Make LISTS of targets and sources. If `execute together` has been
+ * specified for this rule, tack on sources from each instance of this
+ * rule for this target.
+ */
+ nt = make1list( L0, a0->action->targets, 0 );
+ ns = make1list( L0, a0->action->sources, actions->flags );
+ if ( actions->flags & RULE_TOGETHER )
+ for ( a1 = a0->next; a1; a1 = a1->next )
+ if ( a1->action->rule == rule && !a1->action->running )
+ {
+ ns = make1list( ns, a1->action->sources, actions->flags );
+ a1->action->running = 1;
+ }
+
+ /* If doing only updated (or existing) sources, but none have been
+ * updated (or exist), skip this action.
+ */
+ if ( !ns && ( actions->flags & ( RULE_NEWSRCS | RULE_EXISTING ) ) )
+ {
+ list_free( nt );
+ continue;
+ }
+
+ swap_settings( &settings_module, &settings_target, rule->module, t );
+ if ( !shell )
+ shell = var_get( "JAMSHELL" ); /* shell is per-target */
+
+ /* If we had 'actions xxx bind vars' we bind the vars now. */
+ boundvars = make1settings( actions->bindlist );
+ pushsettings( boundvars );
+
+ /*
+ * Build command, starting with all source args.
+ *
+ * If cmd_new returns 0, it is because the resulting command length is
+ * > MAXLINE. In this case, we will slowly reduce the number of source
+ * arguments presented until it does fit. This only applies to actions
+ * that allow PIECEMEAL commands.
+ *
+ * While reducing slowly takes a bit of compute time to get things just
+ * right, it is worth it to get as close to MAXLINE as possible, because
+ * launching the commands we are executing is likely to be much more
+ * compute intensive.
+ *
+ * Note we loop through at least once, for sourceless actions.
+ */
+
+ start = 0;
+ chunk = length = list_length( ns );
+
+ do
+ {
+ /* Build cmd: cmd_new consumes its lists. */
+ CMD * cmd = cmd_new( rule,
+ list_copy( L0, nt ),
+ list_sublist( ns, start, chunk ),
+ list_copy( L0, shell ) );
+
+ if ( cmd )
+ {
+ /* It fit: chain it up. */
+ if ( !cmds ) cmds = cmd;
+ else cmds->tail->next = cmd;
+ cmds->tail = cmd;
+ start += chunk;
+ }
+ else if ( ( actions->flags & RULE_PIECEMEAL ) && ( chunk > 1 ) )
+ {
+ /* Reduce chunk size slowly. */
+ chunk = chunk * 9 / 10;
+ }
+ else
+ {
+ /* Too long and not splittable. */
+ printf( "%s actions too long (max %d):\n", rule->name, MAXLINE
+ );
+
+ /* Tell the user what didn't fit. */
+ cmd = cmd_new( rule, list_copy( L0, nt ),
+ list_sublist( ns, start, chunk ),
+ list_new( L0, newstr( "%" ) ) );
+ fputs( cmd->buf, stdout );
+ exit( EXITBAD );
+ }
+ }
+ while ( start < length );
+
+ /* These were always copied when used. */
+ list_free( nt );
+ list_free( ns );
+
+ /* Free the variables whose values were bound by 'actions xxx bind
+ * vars'.
+ */
+ popsettings( boundvars );
+ freesettings( boundvars );
+ }
+
+ swap_settings( &settings_module, &settings_target, 0, 0 );
+ return cmds;
+}
+
+
+/*
+ * make1list() - turn a list of targets into a LIST, for $(<) and $(>).
+ */
+
+static LIST * make1list( LIST * l, TARGETS * targets, int flags )
+{
+ for ( ; targets; targets = targets->next )
+ {
+ TARGET * t = targets->target;
+
+ if ( t->binding == T_BIND_UNBOUND )
+ make1bind( t );
+
+ if ( ( flags & RULE_EXISTING ) && ( flags & RULE_NEWSRCS ) )
+ {
+ if ( ( t->binding != T_BIND_EXISTS ) && ( t->fate <= T_FATE_STABLE ) )
+ continue;
+ }
+ else
+ {
+ if ( ( flags & RULE_EXISTING ) && ( t->binding != T_BIND_EXISTS ) )
+ continue;
+
+ if ( ( flags & RULE_NEWSRCS ) && ( t->fate <= T_FATE_STABLE ) )
+ continue;
+ }
+
+ /* Prohibit duplicates for RULE_TOGETHER. */
+ if ( flags & RULE_TOGETHER )
+ {
+ LIST * m;
+ for ( m = l; m; m = m->next )
+ if ( !strcmp( m->string, t->boundname ) )
+ break;
+ if ( m )
+ continue;
+ }
+
+ /* Build new list. */
+ l = list_new( l, copystr( t->boundname ) );
+ }
+
+ return l;
+}
+
+
+/*
+ * make1settings() - for vars that get bound values, build up replacement lists.
+ */
+
+static SETTINGS * make1settings( LIST * vars )
+{
+ SETTINGS * settings = 0;
+
+ for ( ; vars; vars = list_next( vars ) )
+ {
+ LIST * l = var_get( vars->string );
+ LIST * nl = 0;
+
+ for ( ; l; l = list_next( l ) )
+ {
+ TARGET * t = bindtarget( l->string );
+
+ /* Make sure the target is bound. */
+ if ( t->binding == T_BIND_UNBOUND )
+ make1bind( t );
+
+ /* Build a new list. */
+ nl = list_new( nl, copystr( t->boundname ) );
+ }
+
+ /* Add to settings chain. */
+ settings = addsettings( settings, VAR_SET, vars->string, nl );
+ }
+
+ return settings;
+}
+
+
+/*
+ * make1bind() - bind targets that were not bound during dependency analysis
+ *
+ * Spot the kludge! If a target is not in the dependency tree, it did not get
+ * bound by make0(), so we have to do it here. Ugly.
+ */
+
+static void make1bind( TARGET * t )
+{
+ if ( t->flags & T_FLAG_NOTFILE )
+ return;
+
+ pushsettings( t->settings );
+ t->boundname = search( t->name, &t->time, 0, ( t->flags & T_FLAG_ISFILE ) );
+ t->binding = t->time ? T_BIND_EXISTS : T_BIND_MISSING;
+ popsettings( t->settings );
+}