/* $NetBSD: suff.c,v 1.168 2020/09/26 16:00:12 rillig Exp $ */ /* * Copyright (c) 1988, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Adam de Boor. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1989 by Berkeley Softworks * All rights reserved. * * This code is derived from software contributed to Berkeley by * Adam de Boor. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /*- * suff.c -- * Functions to maintain suffix lists and find implicit dependents * using suffix transformation rules * * Interface: * Suff_Init Initialize all things to do with suffixes. * * Suff_End Cleanup the module * * Suff_DoPaths This function is used to make life easier * when searching for a file according to its * suffix. It takes the global search path, * as defined using the .PATH: target, and appends * its directories to the path of each of the * defined suffixes, as specified using * .PATH: targets. In addition, all * directories given for suffixes labeled as * include files or libraries, using the .INCLUDES * or .LIBS targets, are played with using * Dir_MakeFlags to create the .INCLUDES and * .LIBS global variables. * * Suff_ClearSuffixes Clear out all the suffixes and defined * transformations. * * Suff_IsTransform Return TRUE if the passed string is the lhs * of a transformation rule. * * Suff_AddSuffix Add the passed string as another known suffix. * * Suff_GetPath Return the search path for the given suffix. * * Suff_AddInclude Mark the given suffix as denoting an include * file. * * Suff_AddLib Mark the given suffix as denoting a library. * * Suff_AddTransform Add another transformation to the suffix * graph. Returns GNode suitable for framing, I * mean, tacking commands, attributes, etc. on. * * Suff_SetNull Define the suffix to consider the suffix of * any file that doesn't have a known one. * * Suff_FindDeps Find implicit sources for and the location of * a target based on its suffix. Returns the * bottom-most node added to the graph or NULL * if the target had no implicit sources. * * Suff_FindPath Return the appropriate path to search in * order to find the node. */ #include "make.h" #include "dir.h" /* "@(#)suff.c 8.4 (Berkeley) 3/21/94" */ MAKE_RCSID("$NetBSD: suff.c,v 1.168 2020/09/26 16:00:12 rillig Exp $"); #define SUFF_DEBUG0(fmt) \ if (!DEBUG(SUFF)) (void) 0; else fprintf(debug_file, fmt) #define SUFF_DEBUG1(fmt, arg1) \ if (!DEBUG(SUFF)) (void) 0; else fprintf(debug_file, fmt, arg1) #define SUFF_DEBUG2(fmt, arg1, arg2) \ if (!DEBUG(SUFF)) (void) 0; else fprintf(debug_file, fmt, arg1, arg2) #define SUFF_DEBUG3(fmt, arg1, arg2, arg3) \ if (!DEBUG(SUFF)) (void) 0; else fprintf(debug_file, fmt, arg1, arg2, arg3) typedef List SuffList; typedef ListNode SuffListNode; typedef List SrcList; typedef ListNode SrcListNode; static SuffList *sufflist; /* List of suffixes */ #ifdef CLEANUP static SuffList *suffClean; /* List of suffixes to be cleaned */ #endif static SrcList *srclist; /* List of sources */ static GNodeList *transforms; /* List of transformation rules */ static int sNum = 0; /* Counter for assigning suffix numbers */ typedef enum { SUFF_INCLUDE = 0x01, /* One which is #include'd */ SUFF_LIBRARY = 0x02, /* One which contains a library */ SUFF_NULL = 0x04 /* The empty suffix */ /* XXX: Why is SUFF_NULL needed? Wouldn't nameLen == 0 mean the same? */ } SuffFlags; ENUM_FLAGS_RTTI_3(SuffFlags, SUFF_INCLUDE, SUFF_LIBRARY, SUFF_NULL); typedef List SuffListList; /* * Structure describing an individual suffix. */ typedef struct Suff { char *name; /* The suffix itself, such as ".c" */ size_t nameLen; /* Length of the name, to avoid strlen calls */ SuffFlags flags; /* Type of suffix */ SearchPath *searchPath; /* The path along which files of this suffix * may be found */ int sNum; /* The suffix number */ int refCount; /* Reference count of list membership */ SuffList *parents; /* Suffixes we have a transformation to */ SuffList *children; /* Suffixes we have a transformation from */ SuffListList *ref; /* Lists in which this suffix is referenced */ } Suff; /* * Structure used in the search for implied sources. */ typedef struct Src { char *file; /* The file to look for */ char *pref; /* Prefix from which file was formed */ Suff *suff; /* The suffix on the file */ struct Src *parent; /* The Src for which this is a source */ GNode *node; /* The node describing the file */ int children; /* Count of existing children (so we don't free * this thing too early or never nuke it) */ #ifdef DEBUG_SRC SrcList *cp; /* Debug; children list */ #endif } Src; /* * A structure for passing more than one argument to the Lst-library-invoked * function... */ typedef struct LstSrc { SrcList *l; Src *s; } LstSrc; /* XXX: Name doesn't match content */ typedef struct GNodeSuff { GNode **gnp; Suff *s; Boolean r; } GNodeSuff; static Suff *suffNull; /* The NULL suffix for this run */ static Suff *emptySuff; /* The empty suffix required for POSIX * single-suffix transformation rules */ static void SuffFindDeps(GNode *, SrcList *); static void SuffExpandWildcards(GNodeListNode *, GNode *); /*************** Lst Predicates ****************/ /*- *----------------------------------------------------------------------- * SuffStrIsPrefix -- * See if pref is a prefix of str. * * Input: * pref possible prefix * str string to check * * Results: * NULL if it ain't, pointer to character in str after prefix if so * * Side Effects: * None *----------------------------------------------------------------------- */ static const char * SuffStrIsPrefix(const char *pref, const char *str) { while (*str && *pref == *str) { pref++; str++; } return *pref ? NULL : str; } struct SuffSuffGetSuffixArgs { size_t name_len; char *name_end; }; /* See if suff is a suffix of str. str->ename should point to THE END * of the string to check. (THE END == the null byte) * * Input: * s possible suffix * str string to examine * * Results: * NULL if it ain't, pointer to character in str before suffix if * it is. */ static char * SuffSuffGetSuffix(const Suff *s, const struct SuffSuffGetSuffixArgs *str) { char *p1; /* Pointer into suffix name */ char *p2; /* Pointer into string being examined */ if (str->name_len < s->nameLen) return NULL; /* this string is shorter than the suffix */ p1 = s->name + s->nameLen; p2 = str->name_end; while (p1 >= s->name && *p1 == *p2) { p1--; p2--; } return p1 == s->name - 1 ? p2 : NULL; } /* Predicate form of SuffSuffGetSuffix, for Lst_Find. */ static Boolean SuffSuffIsSuffix(const void *s, const void *sd) { return SuffSuffGetSuffix(s, sd) != NULL; } static Suff * FindSuffByName(const char *name) { SuffListNode *ln; for (ln = sufflist->first; ln != NULL; ln = ln->next) { Suff *suff = ln->datum; if (strcmp(suff->name, name) == 0) return suff; } return NULL; } /* See if the suffix name is a prefix of the string. Care must be taken when * using this to search for transformations and what-not, since there could * well be two suffixes, one of which is a prefix of the other... */ static Boolean SuffSuffIsPrefix(const void *s, const void *str) { return SuffStrIsPrefix(((const Suff *)s)->name, str) != NULL; } /* See if the graph node has the desired name. */ static Boolean SuffGNHasName(const void *gn, const void *desiredName) { return strcmp(((const GNode *)gn)->name, desiredName) == 0; } /*********** Maintenance Functions ************/ static void SuffUnRef(void *lp, void *sp) { SuffList *l = lp; SuffListNode *ln = Lst_FindDatum(l, sp); if (ln != NULL) { Lst_Remove(l, ln); ((Suff *)sp)->refCount--; } } /* Free up all memory associated with the given suffix structure. */ static void SuffFree(void *sp) { Suff *s = (Suff *)sp; if (s == suffNull) suffNull = NULL; if (s == emptySuff) emptySuff = NULL; #ifdef notdef /* We don't delete suffixes in order, so we cannot use this */ if (s->refCount) Punt("Internal error deleting suffix `%s' with refcount = %d", s->name, s->refCount); #endif Lst_Free(s->ref); Lst_Free(s->children); Lst_Free(s->parents); Lst_Destroy(s->searchPath, Dir_Destroy); free(s->name); free(s); } /* Remove the suffix from the list, and free if it is otherwise unused. */ static void SuffRemove(SuffList *l, Suff *s) { SuffUnRef(l, s); if (s->refCount == 0) { SuffUnRef(sufflist, s); SuffFree(s); } } /* Insert the suffix into the list keeping the list ordered by suffix numbers. * * Input: * l the list where in s should be inserted * s the suffix to insert */ static void SuffInsert(SuffList *l, Suff *s) { SuffListNode *ln; /* current element in l we're examining */ Suff *s2 = NULL; /* the suffix descriptor in this element */ Lst_Open(l); while ((ln = Lst_Next(l)) != NULL) { s2 = LstNode_Datum(ln); if (s2->sNum >= s->sNum) { break; } } Lst_Close(l); SUFF_DEBUG2("inserting %s(%d)...", s->name, s->sNum); if (ln == NULL) { SUFF_DEBUG0("at end of list\n"); Lst_Append(l, s); s->refCount++; Lst_Append(s->ref, l); } else if (s2->sNum != s->sNum) { SUFF_DEBUG2("before %s(%d)\n", s2->name, s2->sNum); Lst_InsertBefore(l, ln, s); s->refCount++; Lst_Append(s->ref, l); } else { SUFF_DEBUG0("already there\n"); } } static Suff * SuffNew(const char *name) { Suff *s = bmake_malloc(sizeof(Suff)); s->name = bmake_strdup(name); s->nameLen = strlen(s->name); s->searchPath = Lst_Init(); s->children = Lst_Init(); s->parents = Lst_Init(); s->ref = Lst_Init(); s->sNum = sNum++; s->flags = 0; s->refCount = 1; return s; } /* This is gross. Nuke the list of suffixes but keep all transformation * rules around. The transformation graph is destroyed in this process, but * we leave the list of rules so when a new graph is formed the rules will * remain. This function is called from the parse module when a .SUFFIXES:\n * line is encountered. */ void Suff_ClearSuffixes(void) { #ifdef CLEANUP Lst_MoveAll(suffClean, sufflist); #endif sufflist = Lst_Init(); sNum = 0; if (suffNull) SuffFree(suffNull); emptySuff = suffNull = SuffNew(""); Dir_Concat(suffNull->searchPath, dirSearchPath); suffNull->flags = SUFF_NULL; } /* Parse a transformation string to find its two component suffixes. * * Input: * str String being parsed * out_src Place to store source of trans. * out_targ Place to store target of trans. * * Results: * TRUE if the string is a valid transformation, FALSE otherwise. */ static Boolean SuffParseTransform(const char *str, Suff **out_src, Suff **out_targ) { SuffListNode *srcLn; /* element in suffix list of trans source*/ Suff *src; /* Source of transformation */ const char *str2; /* Extra pointer (maybe target suffix) */ SuffListNode *singleLn; /* element in suffix list of any suffix * that exactly matches str */ Suff *single = NULL; /* Source of possible transformation to * null suffix */ srcLn = NULL; singleLn = NULL; /* * Loop looking first for a suffix that matches the start of the * string and then for one that exactly matches the rest of it. If * we can find two that meet these criteria, we've successfully * parsed the string. */ for (;;) { if (srcLn == NULL) { srcLn = Lst_Find(sufflist, SuffSuffIsPrefix, str); } else { srcLn = Lst_FindFrom(sufflist, LstNode_Next(srcLn), SuffSuffIsPrefix, str); } if (srcLn == NULL) { /* * Ran out of source suffixes -- no such rule */ if (singleLn != NULL) { /* * Not so fast Mr. Smith! There was a suffix that encompassed * the entire string, so we assume it was a transformation * to the null suffix (thank you POSIX). We still prefer to * find a double rule over a singleton, hence we leave this * check until the end. * * XXX: Use emptySuff over suffNull? */ *out_src = single; *out_targ = suffNull; return TRUE; } return FALSE; } src = LstNode_Datum(srcLn); str2 = str + src->nameLen; if (*str2 == '\0') { single = src; singleLn = srcLn; } else { Suff *targ = FindSuffByName(str2); if (targ != NULL) { *out_src = src; *out_targ = targ; return TRUE; } } } } /* Return TRUE if the given string is a transformation rule, that is, a * concatenation of two known suffixes. */ Boolean Suff_IsTransform(const char *str) { Suff *src, *targ; return SuffParseTransform(str, &src, &targ); } /* Add the transformation rule described by the line to the list of rules * and place the transformation itself in the graph. * * The node is placed on the end of the transforms Lst and links are made * between the two suffixes mentioned in the target name. * Input: * line name of transformation to add * * Results: * The node created for the transformation in the transforms list */ GNode * Suff_AddTransform(const char *line) { GNode *gn; /* GNode of transformation rule */ Suff *s, /* source suffix */ *t; /* target suffix */ GNodeListNode *ln; /* Node for existing transformation */ Boolean ok; ln = Lst_Find(transforms, SuffGNHasName, line); if (ln == NULL) { /* * Make a new graph node for the transformation. It will be filled in * by the Parse module. */ gn = Targ_NewGN(line); Lst_Append(transforms, gn); } else { /* * New specification for transformation rule. Just nuke the old list * of commands so they can be filled in again... We don't actually * free the commands themselves, because a given command can be * attached to several different transformations. */ gn = LstNode_Datum(ln); Lst_Free(gn->commands); Lst_Free(gn->children); gn->commands = Lst_Init(); gn->children = Lst_Init(); } gn->type = OP_TRANSFORM; ok = SuffParseTransform(line, &s, &t); assert(ok); (void)ok; /* * link the two together in the proper relationship and order */ SUFF_DEBUG2("defining transformation from `%s' to `%s'\n", s->name, t->name); SuffInsert(t->children, s); SuffInsert(s->parents, t); return gn; } /* Handle the finish of a transformation definition, removing the * transformation from the graph if it has neither commands nor sources. * * If the node has no commands or children, the children and parents lists * of the affected suffixes are altered. * * Input: * gn Node for transformation */ void Suff_EndTransform(GNode *gn) { if ((gn->type & OP_DOUBLEDEP) && !Lst_IsEmpty(gn->cohorts)) gn = LstNode_Datum(Lst_Last(gn->cohorts)); if ((gn->type & OP_TRANSFORM) && Lst_IsEmpty(gn->commands) && Lst_IsEmpty(gn->children)) { Suff *s, *t; /* * SuffParseTransform() may fail for special rules which are not * actual transformation rules. (e.g. .DEFAULT) */ if (SuffParseTransform(gn->name, &s, &t)) { SuffList *p; SUFF_DEBUG2("deleting transformation from `%s' to `%s'\n", s->name, t->name); /* * Store s->parents because s could be deleted in SuffRemove */ p = s->parents; /* * Remove the source from the target's children list. We check for a * nil return to handle a beanhead saying something like * .c.o .c.o: * * We'll be called twice when the next target is seen, but .c and .o * are only linked once... */ SuffRemove(t->children, s); /* * Remove the target from the source's parents list */ SuffRemove(p, t); } } else if (gn->type & OP_TRANSFORM) { SUFF_DEBUG1("transformation %s complete\n", gn->name); } } /* Called from Suff_AddSuffix via Lst_ForEachUntil to search through the list of * existing transformation rules and rebuild the transformation graph when * it has been destroyed by Suff_ClearSuffixes. If the given rule is a * transformation involving this suffix and another, existing suffix, the * proper relationship is established between the two. * * The appropriate links will be made between this suffix and others if * transformation rules exist for it. * * Input: * transformp Transformation to test * sp Suffix to rebuild */ static void SuffRebuildGraph(void *transformp, void *sp) { GNode *transform = (GNode *)transformp; Suff *s = (Suff *)sp; char *cp; struct SuffSuffGetSuffixArgs sd; /* * First see if it is a transformation from this suffix. */ cp = UNCONST(SuffStrIsPrefix(s->name, transform->name)); if (cp != NULL) { Suff *s2 = FindSuffByName(cp); if (s2 != NULL) { /* Link in and return, since it can't be anything else. */ SuffInsert(s2->children, s); SuffInsert(s->parents, s2); return; } } /* * Not from, maybe to? */ sd.name_len = strlen(transform->name); sd.name_end = transform->name + sd.name_len; cp = SuffSuffGetSuffix(s, &sd); if (cp != NULL) { Suff *s2; /* Null-terminate the source suffix in order to find it. */ /* XXX: don't modify strings, not even temporarily */ cp[1] = '\0'; s2 = FindSuffByName(transform->name); cp[1] = s->name[0]; /* restore */ if (s2 != NULL) { /* establish the proper relationship */ SuffInsert(s->children, s2); SuffInsert(s2->parents, s); } } } /* Called from Suff_AddSuffix via Lst_ForEachUntil to search through the list of * existing targets and find if any of the existing targets can be turned * into a transformation rule. * * If such a target is found and the target is the current main target, the * main target is set to NULL and the next target examined (if that exists) * becomes the main target. * * Results: * 1 if a new main target has been selected, 0 otherwise. */ static int SuffScanTargets(void *targetp, void *gsp) { GNode *target = (GNode *)targetp; GNodeSuff *gs = (GNodeSuff *)gsp; Suff *s, *t; char *ptr; if (*gs->gnp == NULL && gs->r && (target->type & OP_NOTARGET) == 0) { *gs->gnp = target; Targ_SetMain(target); return 1; } if (target->type == OP_TRANSFORM) return 0; if ((ptr = strstr(target->name, gs->s->name)) == NULL || ptr == target->name) return 0; if (SuffParseTransform(target->name, &s, &t)) { if (*gs->gnp == target) { gs->r = TRUE; *gs->gnp = NULL; Targ_SetMain(NULL); } Lst_Free(target->children); target->children = Lst_Init(); target->type = OP_TRANSFORM; /* * link the two together in the proper relationship and order */ SUFF_DEBUG2("defining transformation from `%s' to `%s'\n", s->name, t->name); SuffInsert(t->children, s); SuffInsert(s->parents, t); } return 0; } /* Add the suffix to the end of the list of known suffixes. * Should we restructure the suffix graph? Make doesn't... * * A GNode is created for the suffix and a Suff structure is created and * added to the suffixes list unless the suffix was already known. * The mainNode passed can be modified if a target mutated into a * transform and that target happened to be the main target. * * Input: * name the name of the suffix to add */ void Suff_AddSuffix(const char *name, GNode **gnp) { GNodeSuff gs; Suff *s = FindSuffByName(name); if (s != NULL) return; s = SuffNew(name); Lst_Append(sufflist, s); /* * We also look at our existing targets list to see if adding * this suffix will make one of our current targets mutate into * a suffix rule. This is ugly, but other makes treat all targets * that start with a . as suffix rules. */ gs.gnp = gnp; gs.s = s; gs.r = FALSE; Lst_ForEachUntil(Targ_List(), SuffScanTargets, &gs); /* * Look for any existing transformations from or to this suffix. * XXX: Only do this after a Suff_ClearSuffixes? */ Lst_ForEach(transforms, SuffRebuildGraph, s); } /* Return the search path for the given suffix, or NULL. */ SearchPath * Suff_GetPath(const char *sname) { Suff *s = FindSuffByName(sname); return s != NULL ? s->searchPath : NULL; } /* Extend the search paths for all suffixes to include the default search * path. * * The searchPath field of all the suffixes is extended by the directories * in dirSearchPath. If paths were specified for the ".h" suffix, the * directories are stuffed into a global variable called ".INCLUDES" with * each directory preceded by a -I. The same is done for the ".a" suffix, * except the variable is called ".LIBS" and the flag is -L. */ void Suff_DoPaths(void) { Suff *s; SuffListNode *ln; char *ptr; SearchPath *inIncludes; /* Cumulative .INCLUDES path */ SearchPath *inLibs; /* Cumulative .LIBS path */ inIncludes = Lst_Init(); inLibs = Lst_Init(); Lst_Open(sufflist); while ((ln = Lst_Next(sufflist)) != NULL) { s = LstNode_Datum(ln); if (!Lst_IsEmpty(s->searchPath)) { #ifdef INCLUDES if (s->flags & SUFF_INCLUDE) { Dir_Concat(inIncludes, s->searchPath); } #endif #ifdef LIBRARIES if (s->flags & SUFF_LIBRARY) { Dir_Concat(inLibs, s->searchPath); } #endif Dir_Concat(s->searchPath, dirSearchPath); } else { Lst_Destroy(s->searchPath, Dir_Destroy); s->searchPath = Lst_Copy(dirSearchPath, Dir_CopyDir); } } Lst_Close(sufflist); Var_Set(".INCLUDES", ptr = Dir_MakeFlags("-I", inIncludes), VAR_GLOBAL); free(ptr); Var_Set(".LIBS", ptr = Dir_MakeFlags("-L", inLibs), VAR_GLOBAL); free(ptr); Lst_Destroy(inIncludes, Dir_Destroy); Lst_Destroy(inLibs, Dir_Destroy); } /* Add the given suffix as a type of file which gets included. * Called from the parse module when a .INCLUDES line is parsed. * The suffix must have already been defined. * The SUFF_INCLUDE bit is set in the suffix's flags field. * * Input: * sname Name of the suffix to mark */ void Suff_AddInclude(const char *sname) { Suff *suff = FindSuffByName(sname); if (suff != NULL) suff->flags |= SUFF_INCLUDE; } /* Add the given suffix as a type of file which is a library. * Called from the parse module when parsing a .LIBS line. * The suffix must have been defined via .SUFFIXES before this is called. * The SUFF_LIBRARY bit is set in the suffix's flags field. * * Input: * sname Name of the suffix to mark */ void Suff_AddLib(const char *sname) { Suff *suff = FindSuffByName(sname); if (suff != NULL) suff->flags |= SUFF_LIBRARY; } /********** Implicit Source Search Functions *********/ #ifdef DEBUG_SRC static void PrintAddr(void *a, void *b MAKE_ATTR_UNUSED) { printf("%lx ", (unsigned long) a); } #endif /* Add a suffix as a Src structure to the given list with its parent * being the given Src structure. If the suffix is the null suffix, * the prefix is used unaltered as the file name in the Src structure. * * Input: * sp suffix for which to create a Src structure * lsp list and parent for the new Src */ static void SuffAddSrc(void *sp, void *lsp) { Suff *s = (Suff *)sp; LstSrc *ls = (LstSrc *)lsp; Src *s2; /* new Src structure */ Src *targ; /* Target structure */ targ = ls->s; if ((s->flags & SUFF_NULL) && s->name[0] != '\0') { /* * If the suffix has been marked as the NULL suffix, also create a Src * structure for a file with no suffix attached. Two birds, and all * that... */ s2 = bmake_malloc(sizeof(Src)); s2->file = bmake_strdup(targ->pref); s2->pref = targ->pref; s2->parent = targ; s2->node = NULL; s2->suff = s; s->refCount++; s2->children = 0; targ->children += 1; Lst_Append(ls->l, s2); #ifdef DEBUG_SRC s2->cp = Lst_Init(); Lst_Append(targ->cp, s2); fprintf(debug_file, "1 add %p %p to %p:", targ, s2, ls->l); Lst_ForEach(ls->l, PrintAddr, NULL); fprintf(debug_file, "\n"); #endif } s2 = bmake_malloc(sizeof(Src)); s2->file = str_concat2(targ->pref, s->name); s2->pref = targ->pref; s2->parent = targ; s2->node = NULL; s2->suff = s; s->refCount++; s2->children = 0; targ->children += 1; Lst_Append(ls->l, s2); #ifdef DEBUG_SRC s2->cp = Lst_Init(); Lst_Append(targ->cp, s2); fprintf(debug_file, "2 add %p %p to %p:", targ, s2, ls->l); Lst_ForEach(ls->l, PrintAddr, NULL); fprintf(debug_file, "\n"); #endif } /* Add all the children of targ as Src structures to the given list. * * Input: * l list to which to add the new level * targ Src structure to use as the parent */ static void SuffAddLevel(SrcList *l, Src *targ) { LstSrc ls; ls.s = targ; ls.l = l; Lst_ForEach(targ->suff->children, SuffAddSrc, &ls); } /* Free the first Src in the list that doesn't have a reference count. * Return whether a Src was removed. */ static Boolean SuffRemoveSrc(SrcList *l) { SrcListNode *ln; Src *s; Lst_Open(l); #ifdef DEBUG_SRC fprintf(debug_file, "cleaning %lx: ", (unsigned long) l); Lst_ForEach(l, PrintAddr, NULL); fprintf(debug_file, "\n"); #endif while ((ln = Lst_Next(l)) != NULL) { s = LstNode_Datum(ln); if (s->children == 0) { free(s->file); if (!s->parent) free(s->pref); else { #ifdef DEBUG_SRC SrcListNode *ln2 = Lst_FindDatum(s->parent->cp, s); if (ln2 != NULL) Lst_Remove(s->parent->cp, ln2); #endif --s->parent->children; } #ifdef DEBUG_SRC fprintf(debug_file, "free: [l=%p] p=%p %d\n", l, s, s->children); Lst_Free(s->cp); #endif Lst_Remove(l, ln); free(s); Lst_Close(l); return TRUE; } #ifdef DEBUG_SRC else { fprintf(debug_file, "keep: [l=%p] p=%p %d: ", l, s, s->children); Lst_ForEach(s->cp, PrintAddr, NULL); fprintf(debug_file, "\n"); } #endif } Lst_Close(l); return FALSE; } /* Find the first existing file/target in the list srcs. * * Input: * srcs list of Src structures to search through * * Results: * The lowest structure in the chain of transformations, or NULL. */ static Src * SuffFindThem(SrcList *srcs, SrcList *slst) { Src *s; /* current Src */ Src *rs; /* returned Src */ char *ptr; rs = NULL; while (!Lst_IsEmpty(srcs)) { s = Lst_Dequeue(srcs); SUFF_DEBUG1("\ttrying %s...", s->file); /* * A file is considered to exist if either a node exists in the * graph for it or the file actually exists. */ if (Targ_FindNode(s->file) != NULL) { #ifdef DEBUG_SRC fprintf(debug_file, "remove %p from %p\n", s, srcs); #endif rs = s; break; } if ((ptr = Dir_FindFile(s->file, s->suff->searchPath)) != NULL) { rs = s; #ifdef DEBUG_SRC fprintf(debug_file, "remove %p from %p\n", s, srcs); #endif free(ptr); break; } SUFF_DEBUG0("not there\n"); SuffAddLevel(srcs, s); Lst_Append(slst, s); } if (rs) { SUFF_DEBUG0("got it\n"); } return rs; } /* See if any of the children of the target in the Src structure is one from * which the target can be transformed. If there is one, a Src structure is * put together for it and returned. * * Input: * targ Src to play with * * Results: * The Src of the "winning" child, or NULL. */ static Src * SuffFindCmds(Src *targ, SrcList *slst) { GNodeListNode *gln; GNode *t, /* Target GNode */ *s; /* Source GNode */ size_t prefLen;/* The length of the defined prefix */ Suff *suff; /* Suffix on matching beastie */ Src *ret; /* Return value */ char *cp; t = targ->node; Lst_Open(t->children); prefLen = strlen(targ->pref); for (;;) { gln = Lst_Next(t->children); if (gln == NULL) { Lst_Close(t->children); return NULL; } s = LstNode_Datum(gln); if (s->type & OP_OPTIONAL && Lst_IsEmpty(t->commands)) { /* * We haven't looked to see if .OPTIONAL files exist yet, so * don't use one as the implicit source. * This allows us to use .OPTIONAL in .depend files so make won't * complain "don't know how to make xxx.h' when a dependent file * has been moved/deleted. */ continue; } cp = strrchr(s->name, '/'); if (cp == NULL) { cp = s->name; } else { cp++; } if (strncmp(cp, targ->pref, prefLen) != 0) continue; /* * The node matches the prefix ok, see if it has a known * suffix. */ suff = FindSuffByName(cp + prefLen); if (suff == NULL) continue; /* * It even has a known suffix, see if there's a transformation * defined between the node's suffix and the target's suffix. * * XXX: Handle multi-stage transformations here, too. */ /* XXX: Can targ->suff be NULL here? */ if (targ->suff != NULL && Lst_FindDatum(suff->parents, targ->suff) != NULL) break; } /* * Hot Damn! Create a new Src structure to describe * this transformation (making sure to duplicate the * source node's name so Suff_FindDeps can free it * again (ick)), and return the new structure. */ ret = bmake_malloc(sizeof(Src)); ret->file = bmake_strdup(s->name); ret->pref = targ->pref; ret->suff = suff; suff->refCount++; ret->parent = targ; ret->node = s; ret->children = 0; targ->children += 1; #ifdef DEBUG_SRC ret->cp = Lst_Init(); fprintf(debug_file, "3 add %p %p\n", targ, ret); Lst_Append(targ->cp, ret); #endif Lst_Append(slst, ret); SUFF_DEBUG1("\tusing existing source %s\n", s->name); Lst_Close(t->children); return ret; } /* Expand the names of any children of a given node that contain variable * expressions or file wildcards into actual targets. * * The expanded node is removed from the parent's list of children, and the * parent's unmade counter is decremented, but other nodes may be added. * * Input: * cln Child to examine * pgn Parent node being processed */ static void SuffExpandChildren(GNodeListNode *cln, GNode *pgn) { GNode *cgn = LstNode_Datum(cln); GNode *gn; /* New source 8) */ char *cp; /* Expanded value */ if (!Lst_IsEmpty(cgn->order_pred) || !Lst_IsEmpty(cgn->order_succ)) /* It is all too hard to process the result of .ORDER */ return; if (cgn->type & OP_WAIT) /* Ignore these (& OP_PHONY ?) */ return; /* * First do variable expansion -- this takes precedence over * wildcard expansion. If the result contains wildcards, they'll be gotten * to later since the resulting words are tacked on to the end of * the children list. */ if (strchr(cgn->name, '$') == NULL) { SuffExpandWildcards(cln, pgn); return; } SUFF_DEBUG1("Expanding \"%s\"...", cgn->name); (void)Var_Subst(cgn->name, pgn, VARE_UNDEFERR|VARE_WANTRES, &cp); /* TODO: handle errors */ { GNodeList *members = Lst_Init(); if (cgn->type & OP_ARCHV) { /* * Node was an archive(member) target, so we want to call * on the Arch module to find the nodes for us, expanding * variables in the parent's context. */ char *sacrifice = cp; (void)Arch_ParseArchive(&sacrifice, members, pgn); } else { /* * Break the result into a vector of strings whose nodes * we can find, then add those nodes to the members list. * Unfortunately, we can't use brk_string b/c it * doesn't understand about variable specifications with * spaces in them... */ char *start; char *initcp = cp; /* For freeing... */ for (start = cp; *start == ' ' || *start == '\t'; start++) continue; cp = start; while (*cp != '\0') { if (*cp == ' ' || *cp == '\t') { /* * White-space -- terminate element, find the node, * add it, skip any further spaces. */ *cp++ = '\0'; gn = Targ_GetNode(start); Lst_Append(members, gn); while (*cp == ' ' || *cp == '\t') { cp++; } start = cp; /* Continue at the next non-space. */ } else if (*cp == '$') { /* * Start of a variable spec -- contact variable module * to find the end so we can skip over it. */ const char *nested_p = cp; const char *junk; void *freeIt; /* XXX: Why VARE_WANTRES when the result is not used? */ (void)Var_Parse(&nested_p, pgn, VARE_UNDEFERR|VARE_WANTRES, &junk, &freeIt); /* TODO: handle errors */ if (junk == var_Error) { Parse_Error(PARSE_FATAL, "Malformed variable expression at \"%s\"", cp); cp++; } else { cp += nested_p - cp; } free(freeIt); } else if (*cp == '\\' && cp[1] != '\0') { /* * Escaped something -- skip over it */ /* XXX: In other places, escaping at this syntactical * position is done by a '$', not a '\'. The '\' is only * used in variable modifiers. */ cp += 2; } else { cp++; } } if (cp != start) { /* * Stuff left over -- add it to the list too */ gn = Targ_GetNode(start); Lst_Append(members, gn); } /* * Point cp back at the beginning again so the variable value * can be freed. */ cp = initcp; } /* * Add all elements of the members list to the parent node. */ while(!Lst_IsEmpty(members)) { gn = Lst_Dequeue(members); SUFF_DEBUG1("%s...", gn->name); /* Add gn to the parents child list before the original child */ Lst_InsertBefore(pgn->children, cln, gn); Lst_Append(gn->parents, pgn); pgn->unmade++; /* Expand wildcards on new node */ SuffExpandWildcards(LstNode_Prev(cln), pgn); } Lst_Free(members); /* * Free the result */ free(cp); } SUFF_DEBUG0("\n"); /* * Now the source is expanded, remove it from the list of children to * keep it from being processed. */ pgn->unmade--; Lst_Remove(pgn->children, cln); Lst_Remove(cgn->parents, Lst_FindDatum(cgn->parents, pgn)); } static void SuffExpandWildcards(GNodeListNode *cln, GNode *pgn) { GNode *cgn = LstNode_Datum(cln); StringList *explist; if (!Dir_HasWildcards(cgn->name)) return; /* * Expand the word along the chosen path */ explist = Lst_Init(); Dir_Expand(cgn->name, Suff_FindPath(cgn), explist); while (!Lst_IsEmpty(explist)) { GNode *gn; /* * Fetch next expansion off the list and find its GNode */ char *cp = Lst_Dequeue(explist); SUFF_DEBUG1("%s...", cp); gn = Targ_GetNode(cp); /* Add gn to the parents child list before the original child */ Lst_InsertBefore(pgn->children, cln, gn); Lst_Append(gn->parents, pgn); pgn->unmade++; } Lst_Free(explist); SUFF_DEBUG0("\n"); /* * Now the source is expanded, remove it from the list of children to * keep it from being processed. */ pgn->unmade--; Lst_Remove(pgn->children, cln); Lst_Remove(cgn->parents, Lst_FindDatum(cgn->parents, pgn)); } /* Find a path along which to expand the node. * * If the word has a known suffix, use that path. * If it has no known suffix, use the default system search path. * * Input: * gn Node being examined * * Results: * The appropriate path to search for the GNode. */ SearchPath * Suff_FindPath(GNode* gn) { Suff *suff = gn->suffix; if (suff == NULL) { struct SuffSuffGetSuffixArgs sd; /* Search string data */ SuffListNode *ln; sd.name_len = strlen(gn->name); sd.name_end = gn->name + sd.name_len; ln = Lst_Find(sufflist, SuffSuffIsSuffix, &sd); SUFF_DEBUG1("Wildcard expanding \"%s\"...", gn->name); if (ln != NULL) suff = LstNode_Datum(ln); /* XXX: Here we can save the suffix so we don't have to do this again */ } if (suff != NULL) { SUFF_DEBUG1("suffix is \"%s\"...", suff->name); return suff->searchPath; } else { /* * Use default search path */ return dirSearchPath; } } /* Apply a transformation rule, given the source and target nodes and * suffixes. * * Input: * tGn Target node * sGn Source node * t Target suffix * s Source suffix * * Results: * TRUE if successful, FALSE if not. * * Side Effects: * The source and target are linked and the commands from the * transformation are added to the target node's commands list. * All attributes but OP_DEPMASK and OP_TRANSFORM are applied * to the target. The target also inherits all the sources for * the transformation rule. */ static Boolean SuffApplyTransform(GNode *tGn, GNode *sGn, Suff *t, Suff *s) { GNodeListNode *ln, *nln; /* General node */ char *tname; /* Name of transformation rule */ GNode *gn; /* Node for same */ /* * Form the proper links between the target and source. */ Lst_Append(tGn->children, sGn); Lst_Append(sGn->parents, tGn); tGn->unmade += 1; /* * Locate the transformation rule itself */ tname = str_concat2(s->name, t->name); ln = Lst_Find(transforms, SuffGNHasName, tname); free(tname); if (ln == NULL) { /* * Not really such a transformation rule (can happen when we're * called to link an OP_MEMBER and OP_ARCHV node), so return * FALSE. */ return FALSE; } gn = LstNode_Datum(ln); SUFF_DEBUG3("\tapplying %s -> %s to \"%s\"\n", s->name, t->name, tGn->name); /* * Record last child for expansion purposes */ ln = Lst_Last(tGn->children); /* * Pass the buck to Make_HandleUse to apply the rule */ (void)Make_HandleUse(gn, tGn); /* * Deal with wildcards and variables in any acquired sources */ for (ln = ln != NULL ? LstNode_Next(ln) : NULL; ln != NULL; ln = nln) { nln = LstNode_Next(ln); SuffExpandChildren(ln, tGn); } /* * Keep track of another parent to which this beast is transformed so * the .IMPSRC variable can be set correctly for the parent. */ Lst_Append(sGn->implicitParents, tGn); return TRUE; } /* Locate dependencies for an OP_ARCHV node. * * Input: * gn Node for which to locate dependencies * * Side Effects: * Same as Suff_FindDeps */ static void SuffFindArchiveDeps(GNode *gn, SrcList *slst) { char *eoarch; /* End of archive portion */ char *eoname; /* End of member portion */ GNode *mem; /* Node for member */ SuffListNode *ln, *nln; /* Next suffix node to check */ Suff *ms; /* Suffix descriptor for member */ char *name; /* Start of member's name */ /* * The node is an archive(member) pair. so we must find a * suffix for both of them. */ eoarch = strchr(gn->name, '('); eoname = strchr(eoarch, ')'); /* * Caller guarantees the format `libname(member)', via * Arch_ParseArchive. */ assert(eoarch != NULL); assert(eoname != NULL); *eoname = '\0'; /* Nuke parentheses during suffix search */ *eoarch = '\0'; /* So a suffix can be found */ name = eoarch + 1; /* * To simplify things, call Suff_FindDeps recursively on the member now, * so we can simply compare the member's .PREFIX and .TARGET variables * to locate its suffix. This allows us to figure out the suffix to * use for the archive without having to do a quadratic search over the * suffix list, backtracking for each one... */ mem = Targ_GetNode(name); SuffFindDeps(mem, slst); /* * Create the link between the two nodes right off */ Lst_Append(gn->children, mem); Lst_Append(mem->parents, gn); gn->unmade += 1; /* * Copy in the variables from the member node to this one. */ { char *freeIt; Var_Set(PREFIX, Var_Value(PREFIX, mem, &freeIt), gn); bmake_free(freeIt); Var_Set(TARGET, Var_Value(TARGET, mem, &freeIt), gn); bmake_free(freeIt); } ms = mem->suffix; if (ms == NULL) { /* * Didn't know what it was -- use .NULL suffix if not in make mode */ SUFF_DEBUG0("using null suffix\n"); ms = suffNull; } /* * Set the other two local variables required for this target. */ Var_Set(MEMBER, name, gn); Var_Set(ARCHIVE, gn->name, gn); /* * Set $@ for compatibility with other makes */ Var_Set(TARGET, gn->name, gn); /* * Now we've got the important local variables set, expand any sources * that still contain variables or wildcards in their names. */ for (ln = Lst_First(gn->children); ln != NULL; ln = nln) { nln = LstNode_Next(ln); SuffExpandChildren(ln, gn); } if (ms != NULL) { /* * Member has a known suffix, so look for a transformation rule from * it to a possible suffix of the archive. Rather than searching * through the entire list, we just look at suffixes to which the * member's suffix may be transformed... */ struct SuffSuffGetSuffixArgs sd; /* Search string data */ /* * Use first matching suffix... */ sd.name_len = eoarch - gn->name; sd.name_end = eoarch; ln = Lst_Find(ms->parents, SuffSuffIsSuffix, &sd); if (ln != NULL) { /* * Got one -- apply it */ Suff *suff = LstNode_Datum(ln); if (!SuffApplyTransform(gn, mem, suff, ms)) { SUFF_DEBUG2("\tNo transformation from %s -> %s\n", ms->name, suff->name); } } } /* * Replace the opening and closing parens now we've no need of the separate * pieces. */ *eoarch = '('; *eoname = ')'; /* * Pretend gn appeared to the left of a dependency operator so * the user needn't provide a transformation from the member to the * archive. */ if (OP_NOP(gn->type)) { gn->type |= OP_DEPENDS; } /* * Flag the member as such so we remember to look in the archive for * its modification time. The OP_JOIN | OP_MADE is needed because this * target should never get made. */ mem->type |= OP_MEMBER | OP_JOIN | OP_MADE; } /* Locate implicit dependencies for regular targets. * * Input: * gn Node for which to find sources * * Side Effects: * Same as Suff_FindDeps */ static void SuffFindNormalDeps(GNode *gn, SrcList *slst) { char *eoname; /* End of name */ char *sopref; /* Start of prefix */ SuffListNode *ln, *nln; SrcList *srcs; /* List of sources at which to look */ SrcList *targs; /* List of targets to which things can be * transformed. They all have the same file, * but different suff and pref fields */ Src *bottom; /* Start of found transformation path */ Src *src; /* General Src pointer */ char *pref; /* Prefix to use */ Src *targ; /* General Src target pointer */ struct SuffSuffGetSuffixArgs sd; /* Search string data */ sd.name_len = strlen(gn->name); sd.name_end = eoname = gn->name + sd.name_len; sopref = gn->name; /* * Begin at the beginning... */ ln = Lst_First(sufflist); srcs = Lst_Init(); targs = Lst_Init(); /* * We're caught in a catch-22 here. On the one hand, we want to use any * transformation implied by the target's sources, but we can't examine * the sources until we've expanded any variables/wildcards they may hold, * and we can't do that until we've set up the target's local variables * and we can't do that until we know what the proper suffix for the * target is (in case there are two suffixes one of which is a suffix of * the other) and we can't know that until we've found its implied * source, which we may not want to use if there's an existing source * that implies a different transformation. * * In an attempt to get around this, which may not work all the time, * but should work most of the time, we look for implied sources first, * checking transformations to all possible suffixes of the target, * use what we find to set the target's local variables, expand the * children, then look for any overriding transformations they imply. * Should we find one, we discard the one we found before. */ bottom = NULL; targ = NULL; if (!(gn->type & OP_PHONY)) { while (ln != NULL) { /* * Look for next possible suffix... */ ln = Lst_FindFrom(sufflist, ln, SuffSuffIsSuffix, &sd); if (ln != NULL) { const char *eopref; /* * Allocate a Src structure to which things can be transformed */ targ = bmake_malloc(sizeof(Src)); targ->file = bmake_strdup(gn->name); targ->suff = LstNode_Datum(ln); targ->suff->refCount++; targ->node = gn; targ->parent = NULL; targ->children = 0; #ifdef DEBUG_SRC targ->cp = Lst_Init(); #endif eopref = eoname - targ->suff->nameLen; targ->pref = bmake_strsedup(sopref, eopref); /* * Add nodes from which the target can be made */ SuffAddLevel(srcs, targ); /* * Record the target so we can nuke it */ Lst_Append(targs, targ); /* * Search from this suffix's successor... */ ln = LstNode_Next(ln); } } /* * Handle target of unknown suffix... */ if (Lst_IsEmpty(targs) && suffNull != NULL) { SUFF_DEBUG1("\tNo known suffix on %s. Using .NULL suffix\n", gn->name); targ = bmake_malloc(sizeof(Src)); targ->file = bmake_strdup(gn->name); targ->suff = suffNull; targ->suff->refCount++; targ->node = gn; targ->parent = NULL; targ->children = 0; targ->pref = bmake_strdup(sopref); #ifdef DEBUG_SRC targ->cp = Lst_Init(); #endif /* * Only use the default suffix rules if we don't have commands * defined for this gnode; traditional make programs used to * not define suffix rules if the gnode had children but we * don't do this anymore. */ if (Lst_IsEmpty(gn->commands)) SuffAddLevel(srcs, targ); else { SUFF_DEBUG0("not "); } SUFF_DEBUG0("adding suffix rules\n"); Lst_Append(targs, targ); } /* * Using the list of possible sources built up from the target * suffix(es), try and find an existing file/target that matches. */ bottom = SuffFindThem(srcs, slst); if (bottom == NULL) { /* * No known transformations -- use the first suffix found * for setting the local variables. */ if (!Lst_IsEmpty(targs)) { targ = LstNode_Datum(Lst_First(targs)); } else { targ = NULL; } } else { /* * Work up the transformation path to find the suffix of the * target to which the transformation was made. */ for (targ = bottom; targ->parent != NULL; targ = targ->parent) continue; } } Var_Set(TARGET, gn->path ? gn->path : gn->name, gn); pref = (targ != NULL) ? targ->pref : gn->name; Var_Set(PREFIX, pref, gn); /* * Now we've got the important local variables set, expand any sources * that still contain variables or wildcards in their names. */ for (ln = Lst_First(gn->children); ln != NULL; ln = nln) { nln = LstNode_Next(ln); SuffExpandChildren(ln, gn); } if (targ == NULL) { SUFF_DEBUG1("\tNo valid suffix on %s\n", gn->name); sfnd_abort: /* * Deal with finding the thing on the default search path. We * always do that, not only if the node is only a source (not * on the lhs of a dependency operator or [XXX] it has neither * children or commands) as the old pmake did. */ if ((gn->type & (OP_PHONY|OP_NOPATH)) == 0) { free(gn->path); gn->path = Dir_FindFile(gn->name, (targ == NULL ? dirSearchPath : targ->suff->searchPath)); if (gn->path != NULL) { char *ptr; Var_Set(TARGET, gn->path, gn); if (targ != NULL) { /* * Suffix known for the thing -- trim the suffix off * the path to form the proper .PREFIX variable. */ size_t savep = strlen(gn->path) - targ->suff->nameLen; char savec; if (gn->suffix) gn->suffix->refCount--; gn->suffix = targ->suff; gn->suffix->refCount++; savec = gn->path[savep]; gn->path[savep] = '\0'; if ((ptr = strrchr(gn->path, '/')) != NULL) ptr++; else ptr = gn->path; Var_Set(PREFIX, ptr, gn); gn->path[savep] = savec; } else { /* * The .PREFIX gets the full path if the target has * no known suffix. */ if (gn->suffix) gn->suffix->refCount--; gn->suffix = NULL; if ((ptr = strrchr(gn->path, '/')) != NULL) ptr++; else ptr = gn->path; Var_Set(PREFIX, ptr, gn); } } } goto sfnd_return; } /* * If the suffix indicates that the target is a library, mark that in * the node's type field. */ if (targ->suff->flags & SUFF_LIBRARY) { gn->type |= OP_LIB; } /* * Check for overriding transformation rule implied by sources */ if (!Lst_IsEmpty(gn->children)) { src = SuffFindCmds(targ, slst); if (src != NULL) { /* * Free up all the Src structures in the transformation path * up to, but not including, the parent node. */ while (bottom && bottom->parent != NULL) { if (Lst_FindDatum(slst, bottom) == NULL) { Lst_Append(slst, bottom); } bottom = bottom->parent; } bottom = src; } } if (bottom == NULL) { /* * No idea from where it can come -- return now. */ goto sfnd_abort; } /* * We now have a list of Src structures headed by 'bottom' and linked via * their 'parent' pointers. What we do next is create links between * source and target nodes (which may or may not have been created) * and set the necessary local variables in each target. The * commands for each target are set from the commands of the * transformation rule used to get from the src suffix to the targ * suffix. Note that this causes the commands list of the original * node, gn, to be replaced by the commands of the final * transformation rule. Also, the unmade field of gn is incremented. * Etc. */ if (bottom->node == NULL) { bottom->node = Targ_GetNode(bottom->file); } for (src = bottom; src->parent != NULL; src = src->parent) { targ = src->parent; if (src->node->suffix) src->node->suffix->refCount--; src->node->suffix = src->suff; src->node->suffix->refCount++; if (targ->node == NULL) { targ->node = Targ_GetNode(targ->file); } SuffApplyTransform(targ->node, src->node, targ->suff, src->suff); if (targ->node != gn) { /* * Finish off the dependency-search process for any nodes * between bottom and gn (no point in questing around the * filesystem for their implicit source when it's already * known). Note that the node can't have any sources that * need expanding, since SuffFindThem will stop on an existing * node, so all we need to do is set the standard and System V * variables. */ targ->node->type |= OP_DEPS_FOUND; Var_Set(PREFIX, targ->pref, targ->node); Var_Set(TARGET, targ->node->name, targ->node); } } if (gn->suffix) gn->suffix->refCount--; gn->suffix = src->suff; gn->suffix->refCount++; /* * Nuke the transformation path and the Src structures left over in the * two lists. */ sfnd_return: if (bottom) if (Lst_FindDatum(slst, bottom) == NULL) Lst_Append(slst, bottom); while (SuffRemoveSrc(srcs) || SuffRemoveSrc(targs)) continue; Lst_MoveAll(slst, srcs); Lst_MoveAll(slst, targs); } /* Find implicit sources for the target described by the graph node. * * Nodes are added to the graph below the passed-in node. The nodes are * marked to have their IMPSRC variable filled in. The PREFIX variable is set * for the given node and all its implied children. * * The path found by this target is the shortest path in the transformation * graph, which may pass through non-existent targets, to an existing target. * The search continues on all paths from the root suffix until a file is * found. I.e. if there's a path .o -> .c -> .l -> .l,v from the root and the * .l,v file exists but the .c and .l files don't, the search will branch out * in all directions from .o and again from all the nodes on the next level * until the .l,v node is encountered. */ void Suff_FindDeps(GNode *gn) { SuffFindDeps(gn, srclist); while (SuffRemoveSrc(srclist)) continue; } static void SuffFindDeps(GNode *gn, SrcList *slst) { if (gn->type & OP_DEPS_FOUND) return; gn->type |= OP_DEPS_FOUND; /* * Make sure we have these set, may get revised below. */ Var_Set(TARGET, gn->path ? gn->path : gn->name, gn); Var_Set(PREFIX, gn->name, gn); SUFF_DEBUG1("SuffFindDeps (%s)\n", gn->name); if (gn->type & OP_ARCHV) { SuffFindArchiveDeps(gn, slst); } else if (gn->type & OP_LIB) { /* * If the node is a library, it is the arch module's job to find it * and set the TARGET variable accordingly. We merely provide the * search path, assuming all libraries end in ".a" (if the suffix * hasn't been defined, there's nothing we can do for it, so we just * set the TARGET variable to the node's name in order to give it a * value). */ Suff *s = FindSuffByName(LIBSUFF); if (gn->suffix) gn->suffix->refCount--; if (s != NULL) { gn->suffix = s; gn->suffix->refCount++; Arch_FindLib(gn, s->searchPath); } else { gn->suffix = NULL; Var_Set(TARGET, gn->name, gn); } /* * Because a library (-lfoo) target doesn't follow the standard * filesystem conventions, we don't set the regular variables for * the thing. .PREFIX is simply made empty... */ Var_Set(PREFIX, "", gn); } else { SuffFindNormalDeps(gn, slst); } } /* Define which suffix is the null suffix. * * Need to handle the changing of the null suffix gracefully so the old * transformation rules don't just go away. * * Input: * name Name of null suffix */ void Suff_SetNull(const char *name) { Suff *s = FindSuffByName(name); if (s == NULL) { Parse_Error(PARSE_WARNING, "Desired null suffix %s not defined.", name); return; } if (suffNull != NULL) { suffNull->flags &= ~SUFF_NULL; } s->flags |= SUFF_NULL; /* * XXX: Here's where the transformation mangling would take place */ suffNull = s; } /* Initialize the suffixes module. */ void Suff_Init(void) { #ifdef CLEANUP suffClean = Lst_Init(); sufflist = Lst_Init(); #endif srclist = Lst_Init(); transforms = Lst_Init(); /* * Create null suffix for single-suffix rules (POSIX). The thing doesn't * actually go on the suffix list or everyone will think that's its * suffix. */ Suff_ClearSuffixes(); } /* Clean up the suffixes module. */ void Suff_End(void) { #ifdef CLEANUP Lst_Destroy(sufflist, SuffFree); Lst_Destroy(suffClean, SuffFree); if (suffNull) SuffFree(suffNull); Lst_Free(srclist); Lst_Free(transforms); #endif } /********************* DEBUGGING FUNCTIONS **********************/ static void SuffPrintName(void *s, void *dummy MAKE_ATTR_UNUSED) { fprintf(debug_file, "%s ", ((Suff *)s)->name); } static void SuffPrintSuff(void *sp, void *dummy MAKE_ATTR_UNUSED) { Suff *s = (Suff *)sp; fprintf(debug_file, "# `%s' [%d] ", s->name, s->refCount); if (s->flags != 0) { char flags_buf[SuffFlags_ToStringSize]; fprintf(debug_file, " (%s)", Enum_FlagsToString(flags_buf, sizeof flags_buf, s->flags, SuffFlags_ToStringSpecs)); } fputc('\n', debug_file); fprintf(debug_file, "#\tTo: "); Lst_ForEach(s->parents, SuffPrintName, NULL); fputc('\n', debug_file); fprintf(debug_file, "#\tFrom: "); Lst_ForEach(s->children, SuffPrintName, NULL); fputc('\n', debug_file); fprintf(debug_file, "#\tSearch Path: "); Dir_PrintPath(s->searchPath); fputc('\n', debug_file); } static void SuffPrintTrans(void *tp, void *dummy MAKE_ATTR_UNUSED) { GNode *t = (GNode *)tp; fprintf(debug_file, "%-16s:", t->name); Targ_PrintType(t->type); fputc('\n', debug_file); Targ_PrintCmds(t); fputc('\n', debug_file); } void Suff_PrintAll(void) { fprintf(debug_file, "#*** Suffixes:\n"); Lst_ForEach(sufflist, SuffPrintSuff, NULL); fprintf(debug_file, "#*** Transformations:\n"); Lst_ForEach(transforms, SuffPrintTrans, NULL); }