diff --git a/usr.bin/make/main.c b/usr.bin/make/main.c index 4094276d236f..03a62da968fa 100644 --- a/usr.bin/make/main.c +++ b/usr.bin/make/main.c @@ -1,935 +1,962 @@ /* * Copyright (c) 1988, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * 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. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1988, 1989, 1990, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)main.c 8.3 (Berkeley) 3/19/94"; #endif /* not lint */ /*- * main.c -- * The main file for this entire program. Exit routines etc * reside here. * * Utility functions defined in this file: * Main_ParseArgLine Takes a line of arguments, breaks them and * treats them as if they were given when first * invoked. Used by the parse module to implement * the .MFLAGS target. * * Error Print a tagged error message. The global * MAKE variable must have been defined. This * takes a format string and two optional * arguments for it. * * Fatal Print an error message and exit. Also takes * a format string and two arguments. * * Punt Aborts all jobs and exits with a message. Also * takes a format string and two arguments. * * Finish Finish things up by printing the number of * errors which occured, as passed to it, and * exiting. */ #include #include #include #include #include #include #include #include #include #include #if __STDC__ #include #else #include #endif #include "make.h" #include "hash.h" #include "dir.h" #include "job.h" #include "pathnames.h" #ifndef DEFMAXLOCAL #define DEFMAXLOCAL DEFMAXJOBS #endif DEFMAXLOCAL #define MAKEFLAGS ".MAKEFLAGS" Lst create; /* Targets to be made */ time_t now; /* Time at start of make */ GNode *DEFAULT; /* .DEFAULT node */ Boolean allPrecious; /* .PRECIOUS given on line by itself */ static Boolean noBuiltins; /* -r flag */ static Lst makefiles; /* ordered list of makefiles to read */ +static Boolean printVars; /* print value of one or more vars */ +static Lst variables; /* list of variables to print */ int maxJobs; /* -J argument */ static int maxLocal; /* -L argument */ Boolean compatMake; /* -B argument */ Boolean debug; /* -d flag */ Boolean noExecute; /* -n flag */ Boolean keepgoing; /* -k flag */ Boolean queryFlag; /* -q flag */ Boolean touchFlag; /* -t flag */ Boolean usePipes; /* !-P flag */ Boolean ignoreErrors; /* -i flag */ Boolean beSilent; /* -s flag */ Boolean oldVars; /* variable substitution style */ Boolean checkEnvFirst; /* -e flag */ static Boolean jobsRunning; /* TRUE if the jobs might be running */ static Boolean ReadMakefile(); static void usage(); static char *curdir; /* startup directory */ static char *objdir; /* where we chdir'ed to */ /*- * MainParseArgs -- * Parse a given argument vector. Called from main() and from * Main_ParseArgLine() when the .MAKEFLAGS target is used. * * XXX: Deal with command line overriding .MAKEFLAGS in makefile * * Results: * None * * Side Effects: * Various global and local flags will be set depending on the flags * given */ static void MainParseArgs(argc, argv) int argc; char **argv; { extern int optind; extern char *optarg; int c; optind = 1; /* since we're called more than once */ #ifdef notyet -# define OPTFLAGS "BD:I:L:PSd:ef:ij:knqrst" +# define OPTFLAGS "BD:I:L:PSVd:ef:ij:knqrst" #else -# define OPTFLAGS "D:I:d:ef:ij:knqrst" +# define OPTFLAGS "D:I:V:d:ef:ij:knqrst" #endif rearg: while((c = getopt(argc, argv, OPTFLAGS)) != EOF) { switch(c) { case 'D': Var_Set(optarg, "1", VAR_GLOBAL); Var_Append(MAKEFLAGS, "-D", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'I': Parse_AddIncludeDir(optarg); Var_Append(MAKEFLAGS, "-I", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; + case 'V': + printVars = TRUE; + (void)Lst_AtEnd(variables, (ClientData)optarg); + Var_Append(MAKEFLAGS, "-V", VAR_GLOBAL); + Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); + break; #ifdef notyet case 'B': compatMake = TRUE; break; case 'L': maxLocal = atoi(optarg); Var_Append(MAKEFLAGS, "-L", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'P': usePipes = FALSE; Var_Append(MAKEFLAGS, "-P", VAR_GLOBAL); break; case 'S': keepgoing = FALSE; Var_Append(MAKEFLAGS, "-S", VAR_GLOBAL); break; #endif case 'd': { char *modules = optarg; for (; *modules; ++modules) switch (*modules) { case 'A': debug = ~0; break; case 'a': debug |= DEBUG_ARCH; break; case 'c': debug |= DEBUG_COND; break; case 'd': debug |= DEBUG_DIR; break; case 'f': debug |= DEBUG_FOR; break; case 'g': if (modules[1] == '1') { debug |= DEBUG_GRAPH1; ++modules; } else if (modules[1] == '2') { debug |= DEBUG_GRAPH2; ++modules; } break; case 'j': debug |= DEBUG_JOB; break; case 'm': debug |= DEBUG_MAKE; break; case 's': debug |= DEBUG_SUFF; break; case 't': debug |= DEBUG_TARG; break; case 'v': debug |= DEBUG_VAR; break; default: (void)fprintf(stderr, "make: illegal argument to d option -- %c\n", *modules); usage(); } Var_Append(MAKEFLAGS, "-d", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; } case 'e': checkEnvFirst = TRUE; Var_Append(MAKEFLAGS, "-e", VAR_GLOBAL); break; case 'f': (void)Lst_AtEnd(makefiles, (ClientData)optarg); break; case 'i': ignoreErrors = TRUE; Var_Append(MAKEFLAGS, "-i", VAR_GLOBAL); break; case 'j': maxJobs = atoi(optarg); Var_Append(MAKEFLAGS, "-j", VAR_GLOBAL); Var_Append(MAKEFLAGS, optarg, VAR_GLOBAL); break; case 'k': keepgoing = TRUE; Var_Append(MAKEFLAGS, "-k", VAR_GLOBAL); break; case 'n': noExecute = TRUE; Var_Append(MAKEFLAGS, "-n", VAR_GLOBAL); break; case 'q': queryFlag = TRUE; /* Kind of nonsensical, wot? */ Var_Append(MAKEFLAGS, "-q", VAR_GLOBAL); break; case 'r': noBuiltins = TRUE; Var_Append(MAKEFLAGS, "-r", VAR_GLOBAL); break; case 's': beSilent = TRUE; Var_Append(MAKEFLAGS, "-s", VAR_GLOBAL); break; case 't': touchFlag = TRUE; Var_Append(MAKEFLAGS, "-t", VAR_GLOBAL); break; default: case '?': usage(); } } oldVars = TRUE; /* * See if the rest of the arguments are variable assignments and * perform them if so. Else take them to be targets and stuff them * on the end of the "create" list. */ for (argv += optind, argc -= optind; *argv; ++argv, --argc) if (Parse_IsVar(*argv)) Parse_DoVar(*argv, VAR_CMD); else { if (!**argv) Punt("illegal (null) argument."); if (**argv == '-') { if ((*argv)[1]) optind = 0; /* -flag... */ else optind = 1; /* - */ goto rearg; } (void)Lst_AtEnd(create, (ClientData)strdup(*argv)); } } /*- * Main_ParseArgLine -- * Used by the parse module when a .MFLAGS or .MAKEFLAGS target * is encountered and by main() when reading the .MAKEFLAGS envariable. * Takes a line of arguments and breaks it into its * component words and passes those words and the number of them to the * MainParseArgs function. * The line should have all its leading whitespace removed. * * Results: * None * * Side Effects: * Only those that come from the various arguments. */ void Main_ParseArgLine(line) char *line; /* Line to fracture */ { char **argv; /* Manufactured argument vector */ int argc; /* Number of arguments in argv */ if (line == NULL) return; for (; *line == ' '; ++line) continue; if (!*line) return; argv = brk_string(line, &argc, TRUE); MainParseArgs(argc, argv); } /*- * main -- * The main function, for obvious reasons. Initializes variables * and a few modules, then parses the arguments give it in the * environment and on the command line. Reads the system makefile * followed by either Makefile, makefile or the file given by the * -f argument. Sets the .MAKEFLAGS PMake variable based on all the * flags it has received by then uses either the Make or the Compat * module to create the initial list of targets. * * Results: * If -q was given, exits -1 if anything was out-of-date. Else it exits * 0. * * Side Effects: * The program exits when done. Targets are created. etc. etc. etc. */ int main(argc, argv) int argc; char **argv; { Lst targs; /* target nodes to create -- passed to Make_Init */ Boolean outOfDate = TRUE; /* FALSE if all targets up to date */ struct stat sb, sa; char *p, *p1, *path, *pwd, *getenv(), *getwd(); char mdpath[MAXPATHLEN + 1]; char obpath[MAXPATHLEN + 1]; char cdpath[MAXPATHLEN + 1]; char *realobjdir; /* Where we'd like to go */ struct utsname utsname; char *machine = getenv("MACHINE"); /* * Find where we are and take care of PWD for the automounter... * All this code is so that we know where we are when we start up * on a different machine with pmake. */ curdir = cdpath; if (getcwd(curdir, MAXPATHLEN) == NULL) { (void)fprintf(stderr, "make: %s.\n", strerror(errno)); exit(2); } if (stat(curdir, &sa) == -1) { (void)fprintf(stderr, "make: %s: %s.\n", curdir, strerror(errno)); exit(2); } if ((pwd = getenv("PWD")) != NULL) { if (stat(pwd, &sb) == 0 && sa.st_ino == sb.st_ino && sa.st_dev == sb.st_dev) (void) strcpy(curdir, pwd); } /* * Get the name of this type of MACHINE from utsname * so we can share an executable for similar machines. * (i.e. m68k: amiga hp300, mac68k, sun3, ...) * * Note that while MACHINE is decided at run-time, * MACHINE_ARCH is always known at compile time. */ if (!machine) { if (uname(&utsname)) { perror("make: uname"); exit(2); } machine = utsname.machine; } /* * if the MAKEOBJDIR (or by default, the _PATH_OBJDIR) directory * exists, change into it and build there. Once things are * initted, have to add the original directory to the search path, * and modify the paths for the Makefiles apropriately. The * current directory is also placed as a variable for make scripts. */ if (!(path = getenv("MAKEOBJDIR"))) path = _PATH_OBJDIR; (void) snprintf(mdpath, MAXPATHLEN, "%s%s", path, curdir); realobjdir = mdpath; /* This is where we'd _like_ to be, anyway */ if (stat(mdpath, &sb) == 0 && S_ISDIR(sb.st_mode)) { if (chdir(mdpath)) { (void)fprintf(stderr, "make warning: %s: %s.\n", mdpath, strerror(errno)); objdir = curdir; } else { if (mdpath[0] != '/') { (void) sprintf(obpath, "%s/%s", curdir, mdpath); objdir = obpath; } else objdir = mdpath; } } else objdir = curdir; setenv("PWD", objdir, 1); create = Lst_Init(FALSE); makefiles = Lst_Init(FALSE); + printVars = FALSE; + variables = Lst_Init(FALSE); beSilent = FALSE; /* Print commands as executed */ ignoreErrors = FALSE; /* Pay attention to non-zero returns */ noExecute = FALSE; /* Execute all commands */ keepgoing = FALSE; /* Stop on error */ allPrecious = FALSE; /* Remove targets when interrupted */ queryFlag = FALSE; /* This is not just a check-run */ noBuiltins = FALSE; /* Read the built-in rules */ touchFlag = FALSE; /* Actually update targets */ usePipes = TRUE; /* Catch child output in pipes */ debug = 0; /* No debug verbosity, please. */ jobsRunning = FALSE; maxJobs = DEFMAXJOBS; /* Set default max concurrency */ maxLocal = DEFMAXLOCAL; /* Set default local max concurrency */ #ifdef notyet compatMake = FALSE; /* No compat mode */ #else compatMake = TRUE; /* No compat mode */ #endif /* * Initialize the parsing, directory and variable modules to prepare * for the reading of inclusion paths and variable settings on the * command line */ Dir_Init(); /* Initialize directory structures so -I flags * can be processed correctly */ Parse_Init(); /* Need to initialize the paths of #include * directories */ Var_Init(); /* As well as the lists of variables for * parsing arguments */ str_init(); if (objdir != curdir) Dir_AddDir(dirSearchPath, curdir); Var_Set(".CURDIR", curdir, VAR_GLOBAL); Var_Set(".TARGETOBJDIR", realobjdir, VAR_GLOBAL); Var_Set(".OBJDIR", objdir, VAR_GLOBAL); /* * Initialize various variables. * MAKE also gets this name, for compatibility * .MAKEFLAGS gets set to the empty string just in case. * MFLAGS also gets initialized empty, for compatibility. */ Var_Set("MAKE", argv[0], VAR_GLOBAL); Var_Set(MAKEFLAGS, "", VAR_GLOBAL); Var_Set("MFLAGS", "", VAR_GLOBAL); Var_Set("MACHINE", machine, VAR_GLOBAL); #ifdef MACHINE_ARCH Var_Set("MACHINE_ARCH", MACHINE_ARCH, VAR_GLOBAL); #endif /* * First snag any flags out of the MAKE environment variable. * (Note this is *not* MAKEFLAGS since /bin/make uses that and it's * in a different format). */ #ifdef POSIX Main_ParseArgLine(getenv("MAKEFLAGS")); #else Main_ParseArgLine(getenv("MAKE")); #endif MainParseArgs(argc, argv); /* * Initialize archive, target and suffix modules in preparation for * parsing the makefile(s) */ Arch_Init(); Targ_Init(); Suff_Init(); DEFAULT = NILGNODE; (void)time(&now); /* * Set up the .TARGETS variable to contain the list of targets to be * created. If none specified, make the variable empty -- the parser * will fill the thing in with the default or .MAIN target. */ if (!Lst_IsEmpty(create)) { LstNode ln; for (ln = Lst_First(create); ln != NILLNODE; ln = Lst_Succ(ln)) { char *name = (char *)Lst_Datum(ln); Var_Append(".TARGETS", name, VAR_GLOBAL); } } else Var_Set(".TARGETS", "", VAR_GLOBAL); /* * Read in the built-in rules first, followed by the specified makefile, * if it was (makefile != (char *) NULL), or the default Makefile and * makefile, in that order, if it wasn't. */ if (!noBuiltins && !ReadMakefile(_PATH_DEFSYSMK)) Fatal("make: no system rules (%s).", _PATH_DEFSYSMK); if (!Lst_IsEmpty(makefiles)) { LstNode ln; ln = Lst_Find(makefiles, (ClientData)NULL, ReadMakefile); if (ln != NILLNODE) Fatal("make: cannot open %s.", (char *)Lst_Datum(ln)); } else if (!ReadMakefile("makefile")) (void)ReadMakefile("Makefile"); (void)ReadMakefile(".depend"); Var_Append("MFLAGS", Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1), VAR_GLOBAL); if (p1) free(p1); /* Install all the flags into the MAKE envariable. */ if (((p = Var_Value(MAKEFLAGS, VAR_GLOBAL, &p1)) != NULL) && *p) #ifdef POSIX setenv("MAKEFLAGS", p, 1); #else setenv("MAKE", p, 1); #endif if (p1) free(p1); /* * For compatibility, look at the directories in the VPATH variable * and add them to the search path, if the variable is defined. The * variable's value is in the same format as the PATH envariable, i.e. * ::... */ if (Var_Exists("VPATH", VAR_CMD)) { char *vpath, *path, *cp, savec; /* * GCC stores string constants in read-only memory, but * Var_Subst will want to write this thing, so store it * in an array */ static char VPATH[] = "${VPATH}"; vpath = Var_Subst(NULL, VPATH, VAR_CMD, FALSE); path = vpath; do { /* skip to end of directory */ for (cp = path; *cp != ':' && *cp != '\0'; cp++) continue; /* Save terminator character so know when to stop */ savec = *cp; *cp = '\0'; /* Add directory to search path */ Dir_AddDir(dirSearchPath, path); *cp = savec; path = cp + 1; } while (savec == ':'); (void)free((Address)vpath); } /* * Now that all search paths have been read for suffixes et al, it's * time to add the default search path to their lists... */ Suff_DoPaths(); /* print the initial graph, if the user requested it */ if (DEBUG(GRAPH1)) Targ_PrintGraph(1); + /* print the values of any variables requested by the user */ + if (printVars) { + LstNode ln; + + for (ln = Lst_First(variables); ln != NILLNODE; + ln = Lst_Succ(ln)) { + char *value = Var_Value((char *)Lst_Datum(ln), + VAR_GLOBAL, &p1); + + printf("%s\n", value ? value : ""); + if (p1) + free(p1); + } + } + /* * Have now read the entire graph and need to make a list of targets * to create. If none was given on the command line, we consult the * parsing module to find the main target(s) to create. */ if (Lst_IsEmpty(create)) targs = Parse_MainName(); else targs = Targ_FindList(create, TARG_CREATE); /* * this was original amMake -- want to allow parallelism, so put this * back in, eventually. */ - if (!compatMake) { + if (!compatMake && !printVars) { /* * Initialize job module before traversing the graph, now that * any .BEGIN and .END targets have been read. This is done * only if the -q flag wasn't given (to prevent the .BEGIN from * being executed should it exist). */ if (!queryFlag) { if (maxLocal == -1) maxLocal = maxJobs; Job_Init(maxJobs, maxLocal); jobsRunning = TRUE; } /* Traverse the graph, checking on all the targets */ outOfDate = Make_Run(targs); - } else + } else if (!printVars) { /* * Compat_Init will take care of creating all the targets as * well as initializing the module. */ Compat_Run(targs); + } Lst_Destroy(targs, NOFREE); + Lst_Destroy(variables, NOFREE); Lst_Destroy(makefiles, NOFREE); Lst_Destroy(create, (void (*) __P((ClientData))) free); /* print the graph now it's been processed if the user requested it */ if (DEBUG(GRAPH2)) Targ_PrintGraph(2); Suff_End(); Targ_End(); Arch_End(); str_end(); Var_End(); Parse_End(); Dir_End(); if (queryFlag && outOfDate) return(1); else return(0); } /*- * ReadMakefile -- * Open and parse the given makefile. * * Results: * TRUE if ok. FALSE if couldn't open file. * * Side Effects: * lots */ static Boolean ReadMakefile(fname) char *fname; /* makefile to read */ { extern Lst parseIncPath, sysIncPath; FILE *stream; char *name, path[MAXPATHLEN + 1]; if (!strcmp(fname, "-")) { Parse_File("(stdin)", stdin); Var_Set("MAKEFILE", "", VAR_GLOBAL); } else { if ((stream = fopen(fname, "r")) != NULL) goto found; /* if we've chdir'd, rebuild the path name */ if (curdir != objdir && *fname != '/') { (void)sprintf(path, "%s/%s", curdir, fname); if ((stream = fopen(path, "r")) != NULL) { fname = path; goto found; } } /* look in -I and system include directories. */ name = Dir_FindFile(fname, parseIncPath); if (!name) name = Dir_FindFile(fname, sysIncPath); if (!name || !(stream = fopen(name, "r"))) return(FALSE); fname = name; /* * set the MAKEFILE variable desired by System V fans -- the * placement of the setting here means it gets set to the last * makefile specified, as it is set by SysV make. */ found: Var_Set("MAKEFILE", fname, VAR_GLOBAL); Parse_File(fname, stream); (void)fclose(stream); } return(TRUE); } /*- * Error -- * Print an error message given its format. * * Results: * None. * * Side Effects: * The message is printed. */ /* VARARGS */ void #if __STDC__ Error(char *fmt, ...) #else Error(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); } /*- * Fatal -- * Produce a Fatal error message. If jobs are running, waits for them * to finish. * * Results: * None * * Side Effects: * The program exits */ /* VARARGS */ void #if __STDC__ Fatal(char *fmt, ...) #else Fatal(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif if (jobsRunning) Job_Wait(); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); if (DEBUG(GRAPH2)) Targ_PrintGraph(2); exit(2); /* Not 1 so -q can distinguish error */ } /* * Punt -- * Major exception once jobs are being created. Kills all jobs, prints * a message and exits. * * Results: * None * * Side Effects: * All children are killed indiscriminately and the program Lib_Exits */ /* VARARGS */ void #if __STDC__ Punt(char *fmt, ...) #else Punt(va_alist) va_dcl #endif { va_list ap; #if __STDC__ va_start(ap, fmt); #else char *fmt; va_start(ap); fmt = va_arg(ap, char *); #endif (void)fprintf(stderr, "make: "); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); DieHorribly(); } /*- * DieHorribly -- * Exit without giving a message. * * Results: * None * * Side Effects: * A big one... */ void DieHorribly() { if (jobsRunning) Job_AbortAll(); if (DEBUG(GRAPH2)) Targ_PrintGraph(2); exit(2); /* Not 1, so -q can distinguish error */ } /* * Finish -- * Called when aborting due to errors in child shell to signal * abnormal exit. * * Results: * None * * Side Effects: * The program exits */ void Finish(errors) int errors; /* number of errors encountered in Make_Make */ { Fatal("%d error%s", errors, errors == 1 ? "" : "s"); } /* * emalloc -- * malloc, but die on error. */ char * emalloc(len) size_t len; { char *p; if ((p = (char *) malloc(len)) == NULL) enomem(); return(p); } /* * enomem -- * die when out of memory. */ void enomem() { (void)fprintf(stderr, "make: %s.\n", strerror(errno)); exit(2); } /* * usage -- * exit with usage message */ static void usage() { (void)fprintf(stderr, -"usage: make [-eiknqrst] [-D variable] [-d flags] [-f makefile ]\n\ - [-I directory] [-j max_jobs] [variable=value]\n"); +"usage: make [-eiknqrst] [-D variable] [-d flags] [-f makefile] [-I directory]\n\ + [-j max_jobs] [-V variable] [variable=value] [target ...]\n"); exit(2); } int PrintAddr(a, b) ClientData a; ClientData b; { printf("%lx ", (unsigned long) a); return b ? 0 : 0; } diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1 index c0071140df04..69b359881b61 100644 --- a/usr.bin/make/make.1 +++ b/usr.bin/make/make.1 @@ -1,883 +1,895 @@ .\" Copyright (c) 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" 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. .\" .\" @(#)make.1 8.4 (Berkeley) 3/19/94 .\" .Dd March 19, 1994 .Dt MAKE 1 .Os .Sh NAME .Nm make .Nd maintain program dependencies .Sh SYNOPSIS .Nm make -.Op Fl eiknqrstv +.Op Fl eiknqrst .Op Fl D Ar variable .Op Fl d Ar flags .Op Fl f Ar makefile .Op Fl I Ar directory .Bk -words .Op Fl j Ar max_jobs .Ek +.Op Fl V Ar variable .Op Ar variable=value .Op Ar target ... .Sh DESCRIPTION .Nm Make is a program designed to simplify the maintenance of other programs. Its input is a list of specifications as to the files upon which programs and other files depend. If the file .Ql Pa makefile exists, it is read for this list of specifications. If it does not exist, the file .Ql Pa Makefile is read. If the file .Ql Pa .depend exists, it is read (see .Xr mkdep 1) . .Pp This manual page is intended as a reference document only. For a more thorough description of .Nm make and makefiles, please refer to .%T "Make \- A Tutorial" . .Pp The options are as follows: .Bl -tag -width Ds .It Fl D Ar variable -Define Ar variable +Define +.Ar variable to be 1, in the global context. .It Fl d Ar flags Turn on debugging, and specify which portions of .Nm make are to print debugging information. .Ar Flags is one or more of the following: .Bl -tag -width Ds .It Ar A Print all possible debugging information; equivalent to specifying all of the debugging flags. .It Ar a Print debugging information about archive searching and caching. .It Ar c Print debugging information about conditional evaluation. .It Ar d Print debugging information about directory searching and caching. .It Ar "g1" Print the input graph before making anything. .It Ar "g2" Print the input graph after making everything, or before exiting on error. .It Ar j Print debugging information about running multiple shells. .It Ar m Print debugging information about making targets, including modification dates. .It Ar s Print debugging information about suffix-transformation rules. .It Ar t Print debugging information about target list maintenance. .It Ar v Print debugging information about variable assignment. .El .It Fl e Specify that environmental variables override macro assignments within makefiles. .It Fl f Ar makefile Specify a makefile to read instead of the default .Ql Pa makefile and .Ql Pa Makefile . If .Ar makefile is .Ql Fl , standard input is read. Multiple makefile's may be specified, and are read in the order specified. .It Fl I Ar directory Specify a directory in which to search for makefiles and included makefiles. The system makefile directory is automatically included as part of this list. .It Fl i Ignore non-zero exit of shell commands in the makefile. Equivalent to specifying .Ql Fl before each command line in the makefile. .It Fl j Ar max_jobs Specify the maximum number of jobs that .Nm make may have running at any one time. .It Fl k Continue processing after errors are encountered, but only on those targets that do not depend on the target whose creation caused the error. .It Fl n Display the commands that would have been executed, but do not actually execute them. .It Fl q Do not execute any commands, but exit 0 if the specified targets are up-to-date and 1, otherwise. .It Fl r Do not use the built-in rules specified in the system makefile. .It Fl s Do not echo any commands as they are executed. Equivalent to specifying .Ql Ic @ before each command line in the makefile. .It Fl t Rather than re-building a target as specified in the makefile, create it or update its modification time to make it appear up-to-date. +.It Fl V Ar variable +Print +.Nm make Ns 's +idea of the value of +.Ar variable , +in the global context. +Do not build any targets. +Multiple instances of this option may be specified; +the variables will be printed one per line, +with a blank line for each null or undefined variable. .It Ar variable=value Set the value of the variable .Ar variable to .Ar value . .El .Pp There are seven different types of lines in a makefile: file dependency specifications, shell commands, variable assignments, include statements, conditional directives, for loops, and comments. .Pp In general, lines may be continued from one line to the next by ending them with a backslash .Pq Ql \e . The trailing newline character and initial whitespace on the following line are compressed into a single space. .Sh FILE DEPENDENCY SPECIFICATIONS Dependency lines consist of one or more targets, an operator, and zero or more sources. This creates a relationship where the targets ``depend'' on the sources and are usually created from them. The exact relationship between the target and the source is determined by the operator that separates them. The three operators are as follows: .Bl -tag -width flag .It Ic \&: A target is considered out-of-date if its modification time is less than those of any of its sources. Sources for a target accumulate over dependency lines when this operator is used. The target is removed if .Nm make is interrupted. .It Ic \&! Targets are always re-created, but not until all sources have been examined and re-created as necessary. Sources for a target accumulate over dependency lines when this operator is used. The target is removed if .Nm make is interrupted. .It Ic \&:: If no sources are specified, the target is always re-created. Otherwise, a target is considered out-of-date if any of its sources has been modified more recently than the target. Sources for a target do not accumulate over dependency lines when this operator is used. The target will not be removed if .Nm make is interrupted. .El .Pp Targets and sources may contain the shell wildcard values .Ql ? , .Ql * , .Ql [] and .Ql {} . The values .Ql ? , .Ql * and .Ql [] may only be used as part of the final component of the target or source, and must be used to describe existing files. The value .Ql {} need not necessarily be used to describe existing files. Expansion is in directory order, not alphabetically as done in the shell. .Sh SHELL COMMANDS Each target may have associated with it a series of shell commands, normally used to create the target. Each of the commands in this script .Em must be preceded by a tab. While any target may appear on a dependency line, only one of these dependencies may be followed by a creation script, unless the .Ql Ic :: operator is used. .Pp If the first or first two characters of the command line are .Ql Ic @ and/or .Ql Ic \- , the command is treated specially. A .Ql Ic @ causes the command not to be echoed before it is executed. A .Ql Ic \- causes any non-zero exit status of the command line to be ignored. .Sh VARIABLE ASSIGNMENTS Variables in make are much like variables in the shell, and, by tradition, consist of all upper-case letters. The five operators that can be used to assign values to variables are as follows: .Bl -tag -width Ds .It Ic \&= Assign the value to the variable. Any previous value is overridden. .It Ic \&+= Append the value to the current value of the variable. .It Ic \&?= Assign the value to the variable if it is not already defined. .It Ic \&:= Assign with expansion, i.e. expand the value before assigning it to the variable. Normally, expansion is not done until the variable is referenced. .It Ic \&!= Expand the value and pass it to the shell for execution and assign the result to the variable. Any newlines in the result are replaced with spaces. .El .Pp Any white-space before the assigned .Ar value is removed; if the value is being appended, a single space is inserted between the previous contents of the variable and the appended value. .Pp Variables are expanded by surrounding the variable name with either curly braces .Pq Ql {} or parenthesis .Pq Ql () and preceding it with a dollar sign .Pq Ql \&$ . If the variable name contains only a single letter, the surrounding braces or parenthesis are not required. This shorter form is not recommended. .Pp Variable substitution occurs at two distinct times, depending on where the variable is being used. Variables in dependency lines are expanded as the line is read. Variables in shell commands are expanded when the shell command is executed. .Pp The four different classes of variables (in order of increasing precedence) are: .Bl -tag -width Ds .It Environment variables Variables defined as part of .Nm make Ns 's environment. .It Global variables Variables defined in the makefile or in included makefiles. .It Command line variables Variables defined as part of the command line. .It Local variables Variables that are defined specific to a certain target. The seven local variables are as follows: .Bl -tag -width ".ARCHIVE" .It Va .ALLSRC The list of all sources for this target; also known as .Ql Va \&> . .It Va .ARCHIVE The name of the archive file. .It Va .IMPSRC The name/path of the source from which the target is to be transformed (the ``implied'' source); also known as .Ql Va \&< . .It Va .MEMBER The name of the archive member. .It Va .OODATE The list of sources for this target that were deemed out-of-date; also known as .Ql Va \&? . .It Va .PREFIX The file prefix of the file, containing only the file portion, no suffix or preceding directory components; also known as .Ql Va * . .It Va .TARGET The name of the target; also known as .Ql Va @ . .El .Pp The shorter forms .Ql Va @ , .Ql Va ? , .Ql Va \&> and .Ql Va * are permitted for backward compatibility with historical makefiles and are not recommended. The six variables .Ql Va "@F" , .Ql Va "@D" , .Ql Va " or .Ql .include \*qfile\*q . Variables between the angle brackets or double quotes are expanded to form the file name. If angle brackets are used, the included makefile is expected to be in the system makefile directory. If double quotes are used, the including makefile's directory and any directories specified using the .Fl I option are searched before the system makefile directory. .Pp Conditional expressions are also preceded by a single dot as the first character of a line. The possible conditionals are as follows: .Bl -tag -width Ds .It Ic .undef Ar variable Un-define the specified global variable. Only global variables may be un-defined. .It Xo .Ic \&.if .Oo \&! Oc Ns Ar expression .Op Ar operator expression ... .Xc Test the value of an expression. .It Xo .Ic .ifdef .Oo \&! Oc Ns Ar variable .Op Ar operator variable ... .Xc Test the value of a variable. .It Xo .Ic .ifndef .Oo \&! Oc Ns Ar variable .Op Ar operator variable ... .Xc Test the value of a variable. .It Xo .Ic .ifmake .Oo \&! Oc Ns Ar target .Op Ar operator target ... .Xc Test the the target being built. .It Xo .Ic .ifnmake .Oo \&! Oc Ar target .Op Ar operator target ... .Xc Test the target being built. .It Ic .else Reverse the sense of the last conditional. .It Xo .Ic .elif .Oo \&! Oc Ar expression .Op Ar operator expression ... .Xc A combination of .Ql Ic .else followed by .Ql Ic .if . .It Xo .Ic .elifdef .Oo \&! Oc Ns Ar variable .Op Ar operator variable ... .Xc A combination of .Ql Ic .else followed by .Ql Ic .ifdef . .It Xo .Ic .elifndef .Oo \&! Oc Ns Ar variable .Op Ar operator variable ... .Xc A combination of .Ql Ic .else followed by .Ql Ic .ifndef . .It Xo .Ic .elifmake .Oo \&! Oc Ns Ar target .Op Ar operator target ... .Xc A combination of .Ql Ic .else followed by .Ql Ic .ifmake . .It Xo .Ic .elifnmake .Oo \&! Oc Ns Ar target .Op Ar operator target ... .Xc A combination of .Ql Ic .else followed by .Ql Ic .ifnmake . .It Ic .endif End the body of the conditional. .El .Pp The .Ar operator may be any one of the following: .Bl -tag -width "Cm XX" .It Cm \&|\&| logical OR .It Cm \&&& Logical .Tn AND ; of higher precedence than .Dq . .El .Pp As in C, .Nm make will only evaluate a conditional as far as is necessary to determine its value. Parentheses may be used to change the order of evaluation. The boolean operator .Ql Ic \&! may be used to logically negate an entire conditional. It is of higher precedence than .Ql Ic \&&& . .Pp The value of .Ar expression may be any of the following: .Bl -tag -width Ic defined .It Ic defined Takes a variable name as an argument and evaluates to true if the variable has been defined. .It Ic make Takes a target name as an argument and evaluates to true if the target was specified as part of .Nm make Ns 's command line or was declared the default target (either implicitly or explicitly, see .Va .MAIN ) before the line containing the conditional. .It Ic empty Takes a variable, with possible modifiers, and evaluates to true if the expansion of the variable would result in an empty string. .It Ic exists Takes a file name as an argument and evaluates to true if the file exists. The file is searched for on the system search path (see .Va .PATH ) . .It Ic target Takes a target name as an argument and evaluates to true if the target has been defined. .El .Pp .Ar Expression may also be an arithmetic or string comparison. Variable expansion is performed on both sides of the comparison, after which the integral values are compared. A value is interpreted as hexadecimal if it is preceded by 0x, otherwise it is decimal; octal numbers are not supported. The standard C relational operators are all supported. If after variable expansion, either the left or right hand side of a .Ql Ic == or .Ql Ic "!=" operator is not an integral value, then string comparison is performed between the expanded variables. If no relational operator is given, it is assumed that the expanded variable is being compared against 0. .Pp When .Nm make is evaluating one of these conditional expression, and it encounters a word it doesn't recognize, either the ``make'' or ``defined'' expression is applied to it, depending on the form of the conditional. If the form is .Ql Ic .ifdef or .Ql Ic .ifndef , the ``defined'' expression is applied. Similarly, if the form is .Ql Ic .ifmake or .Ql Ic .ifnmake , the ``make'' expression is applied. .Pp If the conditional evaluates to true the parsing of the makefile continues as before. If it evaluates to false, the following lines are skipped. In both cases this continues until a .Ql Ic .else or .Ql Ic .endif is found. .Pp For loops are typically used to apply a set of rules to a list of files. The syntax of a for loop is: .Bl -tag -width Ds .It Xo .Ic \&.for .Ar variable .Ic in .Ar expression .Xc .It Xo .Xc .It Xo .Ic \&.endfor .Xc .El After the for .Ic expression is evaluated, it is split into words. The iteration .Ic variable is successively set to each word, and substituted in the .Ic make-rules inside the body of the for loop. .Sh COMMENTS Comments begin with a hash .Pq Ql \&# character, anywhere but in a shell command line, and continue to the end of the line. .Sh SPECIAL SOURCES .Bl -tag -width Ic .IGNORE .It Ic .IGNORE Ignore any errors from the commands associated with this target, exactly as if they all were preceded by a dash .Pq Ql \- . .It Ic .MAKE Execute the commands associated with this target even if the .Fl n or .Fl t options were specified. Normally used to mark recursive .Nm make Ns 's . .It Ic .NOTMAIN Normally .Nm make selects the first target it encounters as the default target to be built if no target was specified. This source prevents this target from being selected. .It Ic .OPTIONAL If a target is marked with this attribute and .Nm make can't figure out how to create it, it will ignore this fact and assume the file isn't needed or already exists. .It Ic .PRECIOUS When .Nm make is interrupted, it removes any partially made targets. This source prevents the target from being removed. .It Ic .SILENT Do not echo any of the commands associated with this target, exactly as if they all were preceded by an at sign .Pq Ql @ . .It Ic .USE Turn the target into .Nm make Ns 's . version of a macro. When the target is used as a source for another target, the other target acquires the commands, sources, and attributes (except for .Ic .USE ) of the source. If the target already has commands, the .Ic .USE target's commands are appended to them. .El .Sh "SPECIAL TARGETS" Special targets may not be included with other targets, i.e. they must be the only target specified. .Bl -tag -width Ic .BEGIN .It Ic .BEGIN Any command lines attached to this target are executed before anything else is done. .It Ic .DEFAULT This is sort of a .Ic .USE rule for any target (that was used only as a source) that .Nm make can't figure out any other way to create. Only the shell script is used. The .Ic .IMPSRC variable of a target that inherits .Ic .DEFAULT Ns 's commands is set to the target's own name. .It Ic .END Any command lines attached to this target are executed after everything else is done. .It Ic .IGNORE Mark each of the sources with the .Ic .IGNORE attribute. If no sources are specified, this is the equivalent of specifying the .Fl i option. .It Ic .INTERRUPT If .Nm make is interrupted, the commands for this target will be executed. .It Ic .MAIN If no target is specified when .Nm make is invoked, this target will be built. .It Ic .MAKEFLAGS This target provides a way to specify flags for .Nm make when the makefile is used. The flags are as if typed to the shell, though the .Fl f option will have no effect. .It Ic .PATH The sources are directories which are to be searched for files not found in the current directory. If no sources are specified, any previously specified directories are deleted. .It Ic .PRECIOUS Apply the .Ic .PRECIOUS attribute to any specified sources. If no sources are specified, the .Ic .PRECIOUS attribute is applied to every target in the file. .It Ic .SILENT Apply the .Ic .SILENT attribute to any specified sources. If no sources are specified, the .Ic .SILENT attribute is applied to every command in the file. .It Ic .SUFFIXES Each source specifies a suffix to .Nm make . If no sources are specified, any previous specified suffices are deleted. .Sh ENVIRONMENT .Nm Make utilizes the following environment variables, if they exist: .Ev MAKE , .Ev MAKEFLAGS and .Ev MAKEOBJDIR . .Sh FILES .Bl -tag -width /usr/share/mk -compact .It .depend list of dependencies .It Makefile list of dependencies .It makefile list of dependencies .It sys.mk system makefile .It /usr/share/mk system makefile directory .El .Sh SEE ALSO .Xr mkdep 1 .Sh HISTORY A .Nm Make command appeared in .At v7 .