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- /* Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993
- Free Software Foundation, Inc.
- This file is part of GNU Make.
-
- GNU Make is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Make is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Make; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "make.h"
- #include "commands.h"
- #include "dep.h"
- #include "file.h"
- #include "variable.h"
-
- /* This is POSIX.2, but most systems using -DPOSIX probably don't have it. */
- #ifdef HAVE_GLOB_H
- #include <glob.h>
- #else
- #include "glob/glob.h"
- #endif
-
- #include <pwd.h>
- struct passwd *getpwnam ();
-
-
- static int read_makefile ();
- static unsigned int readline (), do_define ();
- static int conditional_line ();
- static void record_files ();
- static char *find_semicolon ();
-
-
- /* A `struct linebuffer' is a structure which holds a line of text.
- `readline' reads a line from a stream into a linebuffer
- and works regardless of the length of the line. */
-
- struct linebuffer
- {
- /* Note: This is the number of bytes malloc'ed for `buffer'
- It does not indicate `buffer's real length.
- Instead, a null char indicates end-of-string. */
- unsigned int size;
- char *buffer;
- };
-
- #define initbuffer(lb) (lb)->buffer = (char *) xmalloc ((lb)->size = 200)
- #define freebuffer(lb) free ((lb)->buffer)
-
-
- /* A `struct conditionals' contains the information describing
- all the active conditionals in a makefile.
-
- The global variable `conditionals' contains the conditionals
- information for the current makefile. It is initialized from
- the static structure `toplevel_conditionals' and is later changed
- to new structures for included makefiles. */
-
- struct conditionals
- {
- unsigned int if_cmds; /* Depth of conditional nesting. */
- unsigned int allocated; /* Elts allocated in following arrays. */
- char *ignoring; /* Are we ignoring or interepreting? */
- char *seen_else; /* Have we already seen an `else'? */
- };
-
- static struct conditionals toplevel_conditionals;
- static struct conditionals *conditionals = &toplevel_conditionals;
-
-
- /* Default directories to search for include files in */
-
- static char *default_include_directories[] =
- {
- #ifndef amigados
- INCLUDEDIR,
- "/usr/gnu/include",
- "/usr/local/include",
- "/usr/include",
- #else
- "/gnu/include",
- "/gnu/g++-include",
- "/gnu/os-include",
- "/local/include",
- "/local/g++-include",
- "/local/os-include",
- #endif
- 0
- };
-
- /* List of directories to search for include files in */
-
- static char **include_directories;
-
- /* Maximum length of an element of the above. */
-
- static unsigned int max_incl_len;
-
- /* The filename and pointer to line number of the
- makefile currently being read in. */
-
- char *reading_filename;
- unsigned int *reading_lineno_ptr;
-
- /* The chain of makefiles read by read_makefile. */
-
- static struct dep *read_makefiles = 0;
-
- /* Read in all the makefiles and return the chain of their names. */
-
- struct dep *
- read_all_makefiles (makefiles)
- char **makefiles;
- {
- unsigned int num_makefiles = 0;
-
- if (debug_flag)
- puts ("Reading makefiles...");
-
- /* If there's a non-null variable MAKEFILES, its value is a list of
- files to read first thing. But don't let it prevent reading the
- default makefiles and don't let the default goal come from there. */
-
- {
- char *value;
- char *name, *p;
- unsigned int length;
-
- {
- /* Turn off --warn-undefined-variables while we expand MAKEFILES. */
- int save = warn_undefined_variables_flag;
- warn_undefined_variables_flag = 0;
-
- value = allocated_variable_expand ("$(MAKEFILES)");
-
- warn_undefined_variables_flag = save;
- }
-
- /* Set NAME to the start of next token and LENGTH to its length.
- MAKEFILES is updated for finding remaining tokens. */
- p = value;
- while ((name = find_next_token (&p, &length)) != 0)
- {
- if (*p != '\0')
- *p++ = '\0';
- (void) read_makefile (name,
- RM_NO_DEFAULT_GOAL | RM_INCLUDED | RM_DONTCARE);
- }
-
- free (value);
- }
-
- /* Read makefiles specified with -f switches. */
-
- if (makefiles != 0)
- while (*makefiles != 0)
- {
- struct dep *tail = read_makefiles;
- register struct dep *d;
-
- if (! read_makefile (*makefiles, 0))
- perror_with_name ("", *makefiles);
-
- /* Find the right element of read_makefiles. */
- d = read_makefiles;
- while (d->next != tail)
- d = d->next;
-
- /* Use the storage read_makefile allocates. */
- *makefiles = dep_name (d);
- ++num_makefiles;
- ++makefiles;
- }
-
- /* If there were no -f switches, try the default names. */
-
- if (num_makefiles == 0)
- {
- static char *default_makefiles[] =
- { "GNUmakefile", "makefile", "Makefile", 0 };
- register char **p = default_makefiles;
- while (*p != 0 && !file_exists_p (*p))
- ++p;
-
- if (*p != 0)
- {
- if (! read_makefile (*p, 0))
- perror_with_name ("", *p);
- }
- else
- {
- /* No default makefile was found. Add the default makefiles to the
- `read_makefiles' chain so they will be updated if possible. */
- struct dep *tail = read_makefiles;
- for (p = default_makefiles; *p != 0; ++p)
- {
- struct dep *d = (struct dep *) xmalloc (sizeof (struct dep));
- d->name = 0;
- d->file = enter_file (*p);
- d->file->dontcare = 1;
- /* Tell update_goal_chain to bail out as soon as this file is
- made, and main not to die if we can't make this file. */
- d->changed = RM_DONTCARE;
- if (tail == 0)
- read_makefiles = d;
- else
- tail->next = d;
- tail = d;
- }
- if (tail != 0)
- tail->next = 0;
- }
- }
-
- return read_makefiles;
- }
-
- /* Read file FILENAME as a makefile and add its contents to the data base.
-
- FLAGS contains bits as above.
-
- FILENAME is added to the `read_makefiles' chain.
-
- Returns 1 if a file was found and read, 0 if not. */
-
- static int
- read_makefile (filename, flags)
- char *filename;
- int flags;
- {
- static char *collapsed = 0;
- static unsigned int collapsed_length = 0;
- register FILE *infile;
- struct linebuffer lb;
- unsigned int commands_len = 200;
- char *commands = (char *) xmalloc (200);
- unsigned int commands_idx = 0;
- unsigned int commands_started;
- register char *p;
- char *p2;
- int ignoring = 0, in_ignored_define = 0;
- int no_targets = 0; /* Set when reading a rule without targets. */
-
- struct nameseq *filenames = 0;
- struct dep *deps;
- unsigned int lineno = 1;
- unsigned int nlines = 0;
- int two_colon;
- char *pattern = 0, *pattern_percent;
-
- int makefile_errno;
-
- #define record_waiting_files() \
- do \
- { \
- if (filenames != 0) \
- record_files (filenames, pattern, pattern_percent, deps, \
- commands_started, commands, commands_idx, \
- two_colon, filename, lineno, \
- !(flags & RM_NO_DEFAULT_GOAL)); \
- filenames = 0; \
- commands_idx = 0; \
- pattern = 0; \
- } while (0)
-
- #ifdef lint /* Suppress `used before set' messages. */
- two_colon = 0;
- #endif
-
- /* First, get a stream to read. */
-
- /* Expand ~ in FILENAME unless it came from `include',
- in which case it was already done. */
- if (!(flags & RM_NO_TILDE) && filename[0] == '~')
- {
- char *expanded = tilde_expand (filename);
- /* This is a possible memory leak, but I don't care. */
- if (expanded != 0)
- filename = expanded;
- }
-
- infile = fopen (filename, "r");
- /* Save the error code so we print the right message later. */
- makefile_errno = errno;
-
- /* If the makefile wasn't found and it's either a makefile from
- the `MAKEFILES' variable or an included makefile,
- search the included makefile search path for this makefile. */
-
- if (infile == 0 && (flags & RM_INCLUDED) && *filename != '/')
- {
- register unsigned int i;
- for (i = 0; include_directories[i] != 0; ++i)
- {
- char *name = concat (include_directories[i], "/", filename);
- infile = fopen (name, "r");
- if (infile == 0)
- free (name);
- else
- {
- filename = name;
- break;
- }
- }
- }
-
- /* Add FILENAME to the chain of read makefiles. */
- deps = (struct dep *) xmalloc (sizeof (struct dep));
- deps->next = read_makefiles;
- read_makefiles = deps;
- deps->name = 0;
- deps->file = lookup_file (filename);
- if (deps->file == 0)
- {
- deps->file = enter_file (savestring (filename, strlen (filename)));
- if (flags & RM_DONTCARE)
- deps->file->dontcare = 1;
- }
- filename = deps->file->name;
- deps->file->precious = 1;
- deps->changed = flags;
- deps = 0;
-
- /* If the makefile can't be found at all, give up entirely. */
-
- if (infile == 0)
- {
- /* If we did some searching, errno has the error from the last
- attempt, rather from FILENAME itself. Restore it in case the
- caller wants to use it in a message. */
- errno = makefile_errno;
- return 0;
- }
-
- reading_filename = filename;
- reading_lineno_ptr = &lineno;
-
- /* Loop over lines in the file.
- The strategy is to accumulate target names in FILENAMES, dependencies
- in DEPS and commands in COMMANDS. These are used to define a rule
- when the start of the next rule (or eof) is encountered. */
-
- initbuffer (&lb);
-
- while (!feof (infile))
- {
- lineno += nlines;
- nlines = readline (&lb, infile, filename, lineno);
-
- if (collapsed_length < lb.size)
- {
- collapsed_length = lb.size;
- if (collapsed != 0)
- free (collapsed);
- collapsed = (char *) xmalloc (collapsed_length);
- }
- strcpy (collapsed, lb.buffer);
- /* Collapse continuation lines. */
- collapse_continuations (collapsed);
- remove_comments (collapsed);
-
- p = collapsed;
- while (isspace (*p))
- ++p;
- /* We cannot consider a line containing just a tab to be empty
- because it might constitute an empty command for a target. */
- if (*p == '\0' && lb.buffer[0] != '\t')
- continue;
-
- /* strncmp is first to avoid dereferencing out into space. */
- #define word1eq(s, l) (!strncmp (s, p, l) \
- && (p[l] == '\0' || isblank (p[l])))
- if (!in_ignored_define
- && (word1eq ("ifdef", 5) || word1eq ("ifndef", 6)
- || word1eq ("ifeq", 4) || word1eq ("ifneq", 5)
- || word1eq ("else", 4) || word1eq ("endif", 5)))
- {
- int i = conditional_line (p, filename, lineno);
- if (i >= 0)
- ignoring = i;
- else
- makefile_fatal (filename, lineno,
- "invalid syntax in conditional");
- continue;
- }
- else if (word1eq ("endef", 5))
- {
- if (in_ignored_define)
- in_ignored_define = 0;
- else
- makefile_fatal (filename, lineno, "extraneous `endef'");
- continue;
- }
- else if (word1eq ("define", 6))
- {
- if (ignoring)
- in_ignored_define = 1;
- else
- {
- p2 = next_token (p + 6);
- p = end_of_token (p2);
- lineno = do_define (p2, p - p2, o_file,
- lineno, infile, filename);
- }
- continue;
- }
- else if (word1eq ("override", 8))
- {
- p2 = next_token (p + 8);
- if (p2 == 0)
- makefile_error (filename, lineno, "empty `override' directive");
- if (!strncmp (p2, "define", 6) && (isblank (p2[6]) || p2[6] == '\0'))
- {
- if (ignoring)
- in_ignored_define = 1;
- else
- {
- unsigned int len;
- p2 = end_of_token (p2);
- p = find_next_token (&p2, &len);
- lineno = do_define (p, len, o_override,
- lineno, infile, filename);
- }
- }
- else if (!ignoring
- && !try_variable_definition (filename, lineno,
- p2, o_override))
- makefile_error (filename, lineno, "empty `override' directive");
-
- continue;
- }
-
-
- if (ignoring)
- /* Ignore the line. We continue here so conditionals
- can appear in the middle of a rule. */
- continue;
- else if (lb.buffer[0] == '\t')
- {
- /* This line is a shell command. */
- unsigned int len;
-
- if (no_targets)
- /* Ignore the commands in a rule with no targets. */
- continue;
-
- /* If there is no preceding rule line, don't treat this line
- as a command, even though it begins with a tab character.
- SunOS 4 make appears to behave this way. */
-
- if (filenames != 0)
- {
- /* Append this command line to the line being accumulated. */
- p = lb.buffer;
- if (commands_idx == 0)
- commands_started = lineno;
- len = strlen (p);
- if (len + 1 + commands_idx > commands_len)
- {
- commands_len = (len + 1 + commands_idx) * 2;
- commands = (char *) xrealloc (commands, commands_len);
- }
- bcopy (p, &commands[commands_idx], len);
- commands_idx += len;
- commands[commands_idx++] = '\n';
-
- continue;
- }
- }
-
- if (word1eq ("export", 6))
- {
- struct variable *v;
- p2 = next_token (p + 6);
- if (*p2 == '\0')
- export_all_variables = 1;
- v = try_variable_definition (filename, lineno, p2, o_file);
- if (v != 0)
- v->export = v_export;
- else
- {
- unsigned int len;
- for (p = find_next_token (&p2, &len); p != 0;
- p = find_next_token (&p2, &len))
- {
- v = lookup_variable (p, len);
- if (v == 0)
- v = define_variable (p, len, "", o_file, 0);
- v->export = v_export;
- }
- }
- }
- else if (word1eq ("unexport", 8))
- {
- unsigned int len;
- struct variable *v;
- p2 = next_token (p + 8);
- if (*p2 == '\0')
- export_all_variables = 0;
- for (p = find_next_token (&p2, &len); p != 0;
- p = find_next_token (&p2, &len))
- {
- v = lookup_variable (p, len);
- if (v == 0)
- v = define_variable (p, len, "", o_file, 0);
- v->export = v_noexport;
- }
- }
- else if (word1eq ("include", 7) || word1eq ("-include", 8))
- {
- /* We have found an `include' line specifying a nested
- makefile to be read at this point. */
- struct conditionals *save, new_conditionals;
- struct nameseq *files;
- /* "-include" (vs "include") says no
- error if the file does not exist. */
- int noerror = p[0] == '-';
-
- p = allocated_variable_expand (next_token (p + (noerror ? 9 : 8)));
- if (*p == '\0')
- {
- makefile_error (filename, lineno,
- "no file name for `%sinclude'",
- noerror ? "-" : "");
- continue;
- }
-
- /* Parse the list of file names. */
- p2 = p;
- files = multi_glob (parse_file_seq (&p2, '\0',
- sizeof (struct nameseq),
- 1),
- sizeof (struct nameseq));
- free (p);
-
- /* Save the state of conditionals and start
- the included makefile with a clean slate. */
- save = conditionals;
- bzero ((char *) &new_conditionals, sizeof new_conditionals);
- conditionals = &new_conditionals;
-
- /* Record the rules that are waiting so they will determine
- the default goal before those in the included makefile. */
- record_waiting_files ();
-
- /* Read each included makefile. */
- while (files != 0)
- {
- struct nameseq *next = files->next;
- char *name = files->name;
- free (files);
- files = next;
-
- if (! read_makefile (name, (RM_INCLUDED | RM_NO_TILDE
- | (noerror ? RM_DONTCARE : 0))))
- makefile_error (filename, lineno,
- "%s: %s", name, strerror (errno));
- }
-
- /* Free any space allocated by conditional_line. */
- if (conditionals->ignoring)
- free (conditionals->ignoring);
- if (conditionals->seen_else)
- free (conditionals->seen_else);
-
- /* Restore state. */
- conditionals = save;
- reading_filename = filename;
- reading_lineno_ptr = &lineno;
- }
- else if (word1eq ("vpath", 5))
- {
- char *pattern;
- unsigned int len;
- p2 = variable_expand (p + 5);
- p = find_next_token (&p2, &len);
- if (p != 0)
- {
- pattern = savestring (p, len);
- p = find_next_token (&p2, &len);
- /* No searchpath means remove all previous
- selective VPATH's with the same pattern. */
- }
- else
- /* No pattern means remove all previous selective VPATH's. */
- pattern = 0;
- construct_vpath_list (pattern, p);
- if (pattern != 0)
- free (pattern);
- }
- #undef word1eq
- else if (try_variable_definition (filename, lineno, p, o_file))
- /* This line has been dealt with. */
- ;
- else if (lb.buffer[0] == '\t')
- /* This line starts with a tab but was not caught above
- because there was no preceding target, and the line
- might have been usable as a variable definition.
- But now it is definitely lossage. */
- makefile_fatal (filename, lineno,
- "commands commence before first target");
- else
- {
- /* This line describes some target files. */
-
- char *cmdleft;
-
- /* Record the previous rule. */
-
- record_waiting_files ();
-
- /* Look for a semicolon in the unexpanded line. */
- cmdleft = find_semicolon (lb.buffer);
- if (cmdleft != 0)
- /* Found one. Cut the line short there before expanding it. */
- *cmdleft = '\0';
-
- collapse_continuations (lb.buffer);
-
- /* Expand variable and function references before doing anything
- else so that special characters can be inside variables. */
- p = variable_expand (lb.buffer);
-
- if (cmdleft == 0)
- /* Look for a semicolon in the expanded line. */
- cmdleft = find_semicolon (p);
-
- if (cmdleft != 0)
- /* Cut the line short at the semicolon. */
- *cmdleft = '\0';
-
- /* Remove comments from the line. */
- remove_comments (p);
-
- p2 = next_token (p);
- if (*p2 == '\0')
- {
- if (cmdleft != 0)
- makefile_fatal (filename, lineno,
- "missing rule before commands");
- else
- /* This line contained a variable reference that
- expanded to nothing but whitespace. */
- continue;
- }
- else if (*p2 == ':')
- {
- /* We accept and ignore rules without targets for
- compatibility with SunOS 4 make. */
- no_targets = 1;
- continue;
- }
-
- filenames = multi_glob (parse_file_seq (&p2, ':',
- sizeof (struct nameseq),
- 1),
- sizeof (struct nameseq));
- if (*p2++ == '\0')
- makefile_fatal (filename, lineno, "missing separator");
- /* Is this a one-colon or two-colon entry? */
- two_colon = *p2 == ':';
- if (two_colon)
- p2++;
-
- /* We have some targets, so don't ignore the following commands. */
- no_targets = 0;
-
- /* Is this a static pattern rule: `target: %targ: %dep; ...'? */
- p = index (p2, ':');
- while (p != 0 && p[-1] == '\\')
- {
- register char *q = &p[-1];
- register int backslash = 0;
- while (*q-- == '\\')
- backslash = !backslash;
- if (backslash)
- p = index (p + 1, ':');
- else
- break;
- }
- if (p != 0)
- {
- struct nameseq *target;
- target = parse_file_seq (&p2, ':', sizeof (struct nameseq), 1);
- ++p2;
- if (target == 0)
- makefile_fatal (filename, lineno, "missing target pattern");
- else if (target->next != 0)
- makefile_fatal (filename, lineno, "multiple target patterns");
- pattern = target->name;
- pattern_percent = find_percent (pattern);
- if (pattern_percent == 0)
- makefile_fatal (filename, lineno,
- "target pattern contains no `%%'");
- }
- else
- pattern = 0;
-
- /* Parse the dependencies. */
- deps = (struct dep *)
- multi_glob (parse_file_seq (&p2, '\0', sizeof (struct dep), 1),
- sizeof (struct dep));
-
- commands_idx = 0;
- if (cmdleft != 0)
- {
- /* Semicolon means rest of line is a command. */
- unsigned int len = strlen (cmdleft + 1);
-
- commands_started = lineno;
-
- /* Add this command line to the buffer. */
- if (len + 2 > commands_len)
- {
- commands_len = (len + 2) * 2;
- commands = (char *) xrealloc (commands, commands_len);
- }
- bcopy (cmdleft + 1, commands, len);
- commands_idx += len;
- commands[commands_idx++] = '\n';
- }
-
- continue;
- }
-
- /* We get here except in the case that we just read a rule line.
- Record now the last rule we read, so following spurious
- commands are properly diagnosed. */
- record_waiting_files ();
- no_targets = 0;
- }
-
- if (conditionals->if_cmds)
- makefile_fatal (filename, lineno, "missing `endif'");
-
- /* At eof, record the last rule. */
- record_waiting_files ();
-
- freebuffer (&lb);
- free ((char *) commands);
- fclose (infile);
-
- reading_filename = 0;
- reading_lineno_ptr = 0;
-
- return 1;
- }
-
- /* Execute a `define' directive.
- The first line has already been read, and NAME is the name of
- the variable to be defined. The following lines remain to be read.
- LINENO, INFILE and FILENAME refer to the makefile being read.
- The value returned is LINENO, updated for lines read here. */
-
- static unsigned int
- do_define (name, namelen, origin, lineno, infile, filename)
- char *name;
- unsigned int namelen;
- enum variable_origin origin;
- unsigned int lineno;
- FILE *infile;
- char *filename;
- {
- struct linebuffer lb;
- unsigned int nlines = 0;
- unsigned int length = 100;
- char *definition = (char *) xmalloc (100);
- register unsigned int idx = 0;
- register char *p;
-
- /* Expand the variable name. */
- char *var = (char *) alloca (namelen + 1);
- bcopy (name, var, namelen);
- var[namelen] = '\0';
- var = variable_expand (var);
-
- initbuffer (&lb);
- while (!feof (infile))
- {
- lineno += nlines;
- nlines = readline (&lb, infile, filename, lineno);
- p = next_token (lb.buffer);
-
- if ((p[5] == '\0' || isblank (p[5])) && !strncmp (p, "endef", 5))
- {
- p += 5;
- collapse_continuations (p);
- remove_comments (p);
- if (*next_token (p) != '\0')
- makefile_error (filename, lineno,
- "Extraneous text after `endef' directive");
- /* Define the variable. */
- if (idx == 0)
- definition[0] = '\0';
- else
- definition[idx - 1] = '\0';
- (void) define_variable (var, strlen (var), definition, origin, 1);
- free (definition);
- freebuffer (&lb);
- return lineno;
- }
- else
- {
- unsigned int len = strlen (p);
-
- /* Increase the buffer size if necessary. */
- if (idx + len + 1 > length)
- {
- length = (idx + len) * 2;
- definition = (char *) xrealloc (definition, length + 1);
- }
-
- bcopy (p, &definition[idx], len);
- idx += len;
- /* Separate lines with a newline. */
- definition[idx++] = '\n';
- }
- }
-
- /* No `endef'!! */
- makefile_fatal (filename, lineno, "missing `endef', unterminated `define'");
-
- /* NOTREACHED */
- return 0;
- }
-
- /* Interpret conditional commands "ifdef", "ifndef", "ifeq",
- "ifneq", "else" and "endif".
- LINE is the input line, with the command as its first word.
-
- FILENAME and LINENO are the filename and line number in the
- current makefile. They are used for error messages.
-
- Value is -1 if the line is invalid,
- 0 if following text should be interpreted,
- 1 if following text should be ignored. */
-
- static int
- conditional_line (line, filename, lineno)
- char *line;
- char *filename;
- unsigned int lineno;
- {
- int notdef;
- char *cmdname;
- register unsigned int i;
-
- if (*line == 'i')
- {
- /* It's an "if..." command. */
- notdef = line[2] == 'n';
- if (notdef)
- {
- cmdname = line[3] == 'd' ? "ifndef" : "ifneq";
- line += cmdname[3] == 'd' ? 7 : 6;
- }
- else
- {
- cmdname = line[2] == 'd' ? "ifdef" : "ifeq";
- line += cmdname[2] == 'd' ? 6 : 5;
- }
- }
- else
- {
- /* It's an "else" or "endif" command. */
- notdef = line[1] == 'n';
- cmdname = notdef ? "endif" : "else";
- line += notdef ? 5 : 4;
- }
-
- line = next_token (line);
-
- if (*cmdname == 'e')
- {
- if (*line != '\0')
- makefile_error (filename, lineno,
- "Extraneous text after `%s' directive",
- cmdname);
- /* "Else" or "endif". */
- if (conditionals->if_cmds == 0)
- makefile_fatal (filename, lineno, "extraneous `%s'", cmdname);
- /* NOTDEF indicates an `endif' command. */
- if (notdef)
- --conditionals->if_cmds;
- else if (conditionals->seen_else[conditionals->if_cmds - 1])
- makefile_fatal (filename, lineno, "only one `else' per conditional");
- else
- {
- /* Toggle the state of ignorance. */
- conditionals->ignoring[conditionals->if_cmds - 1]
- = !conditionals->ignoring[conditionals->if_cmds - 1];
- /* Record that we have seen an `else' in this conditional.
- A second `else' will be erroneous. */
- conditionals->seen_else[conditionals->if_cmds - 1] = 1;
- }
- for (i = 0; i < conditionals->if_cmds; ++i)
- if (conditionals->ignoring[i])
- return 1;
- return 0;
- }
-
- if (conditionals->allocated == 0)
- {
- conditionals->allocated = 5;
- conditionals->ignoring = (char *) xmalloc (conditionals->allocated);
- conditionals->seen_else = (char *) xmalloc (conditionals->allocated);
- }
-
- ++conditionals->if_cmds;
- if (conditionals->if_cmds > conditionals->allocated)
- {
- conditionals->allocated += 5;
- conditionals->ignoring = (char *)
- xrealloc (conditionals->ignoring, conditionals->allocated);
- conditionals->seen_else = (char *)
- xrealloc (conditionals->seen_else, conditionals->allocated);
- }
-
- /* Record that we have seen an `if...' but no `else' so far. */
- conditionals->seen_else[conditionals->if_cmds - 1] = 0;
-
- /* Search through the stack to see if we're already ignoring. */
- for (i = 0; i < conditionals->if_cmds - 1; ++i)
- if (conditionals->ignoring[i])
- {
- /* We are already ignoring, so just push a level
- to match the next "else" or "endif", and keep ignoring.
- We don't want to expand variables in the condition. */
- conditionals->ignoring[conditionals->if_cmds - 1] = 1;
- return 1;
- }
-
- if (cmdname[notdef ? 3 : 2] == 'd')
- {
- /* "Ifdef" or "ifndef". */
- struct variable *v;
- register char *p = end_of_token (line);
- i = p - line;
- p = next_token (p);
- if (*p != '\0')
- return -1;
- v = lookup_variable (line, i);
- conditionals->ignoring[conditionals->if_cmds - 1]
- = (v != 0 && *v->value != '\0') == notdef;
- }
- else
- {
- /* "Ifeq" or "ifneq". */
- char *s1, *s2;
- unsigned int len;
- char termin = *line == '(' ? ',' : *line;
-
- if (termin != ',' && termin != '"' && termin != '\'')
- return -1;
-
- s1 = ++line;
- /* Find the end of the first string. */
- if (termin == ',')
- {
- register int count = 0;
- for (; *line != '\0'; ++line)
- if (*line == '(')
- ++count;
- else if (*line == ')')
- --count;
- else if (*line == ',' && count <= 0)
- break;
- }
- else
- while (*line != '\0' && *line != termin)
- ++line;
-
- if (*line == '\0')
- return -1;
-
- *line++ = '\0';
-
- s2 = variable_expand (s1);
- /* We must allocate a new copy of the expanded string because
- variable_expand re-uses the same buffer. */
- len = strlen (s2);
- s1 = (char *) alloca (len + 1);
- bcopy (s2, s1, len + 1);
-
- if (termin != ',')
- /* Find the start of the second string. */
- line = next_token (line);
-
- termin = termin == ',' ? ')' : *line;
- if (termin != ')' && termin != '"' && termin != '\'')
- return -1;
-
- /* Find the end of the second string. */
- if (termin == ')')
- {
- register int count = 0;
- s2 = next_token (line);
- for (line = s2; *line != '\0'; ++line)
- {
- if (*line == '(')
- ++count;
- else if (*line == ')')
- if (count <= 0)
- break;
- else
- --count;
- }
- }
- else
- {
- ++line;
- s2 = line;
- while (*line != '\0' && *line != termin)
- ++line;
- }
-
- if (*line == '\0')
- return -1;
-
- *line = '\0';
- line = next_token (++line);
- if (*line != '\0')
- makefile_error (filename, lineno,
- "Extraneous text after `%s' directive",
- cmdname);
-
- s2 = variable_expand (s2);
- conditionals->ignoring[conditionals->if_cmds - 1]
- = streq (s1, s2) == notdef;
- }
-
- /* Search through the stack to see if we're ignoring. */
- for (i = 0; i < conditionals->if_cmds; ++i)
- if (conditionals->ignoring[i])
- return 1;
- return 0;
- }
-
- /* Remove duplicate dependencies in CHAIN. */
-
- void
- uniquize_deps (chain)
- struct dep *chain;
- {
- register struct dep *d;
-
- /* Make sure that no dependencies are repeated. This does not
- really matter for the purpose of updating targets, but it
- might make some names be listed twice for $^ and $?. */
-
- for (d = chain; d != 0; d = d->next)
- {
- struct dep *last, *next;
-
- last = d;
- next = d->next;
- while (next != 0)
- if (streq (dep_name (d), dep_name (next)))
- {
- struct dep *n = next->next;
- last->next = n;
- if (next->name != 0 && next->name != d->name)
- free (next->name);
- if (next != d)
- free ((char *) next);
- next = n;
- }
- else
- {
- last = next;
- next = next->next;
- }
- }
- }
-
- /* Record a description line for files FILENAMES,
- with dependencies DEPS, commands to execute described
- by COMMANDS and COMMANDS_IDX, coming from FILENAME:COMMANDS_STARTED.
- TWO_COLON is nonzero if a double colon was used.
- If not nil, PATTERN is the `%' pattern to make this
- a static pattern rule, and PATTERN_PERCENT is a pointer
- to the `%' within it.
-
- The links of FILENAMES are freed, and so are any names in it
- that are not incorporated into other data structures. */
-
- static void
- record_files (filenames, pattern, pattern_percent, deps, commands_started,
- commands, commands_idx, two_colon, filename, lineno, set_default)
- struct nameseq *filenames;
- char *pattern, *pattern_percent;
- struct dep *deps;
- unsigned int commands_started;
- char *commands;
- unsigned int commands_idx;
- int two_colon;
- char *filename;
- unsigned int lineno;
- int set_default;
- {
- struct nameseq *nextf;
- int implicit = 0;
- unsigned int max_targets, target_idx;
- char **targets = 0, **target_percents = 0;
- struct commands *cmds;
-
- if (commands_idx > 0)
- {
- cmds = (struct commands *) xmalloc (sizeof (struct commands));
- cmds->filename = filename;
- cmds->lineno = commands_started;
- cmds->commands = savestring (commands, commands_idx);
- cmds->command_lines = 0;
- }
- else
- cmds = 0;
-
- for (; filenames != 0; filenames = nextf)
- {
- register char *name = filenames->name;
- register struct file *f;
- register struct dep *d;
- struct dep *this;
- char *implicit_percent;
-
- nextf = filenames->next;
- free ((char *) filenames);
-
- implicit_percent = find_percent (name);
- implicit |= implicit_percent != 0;
-
- if (implicit && pattern != 0)
- makefile_fatal (filename, lineno,
- "mixed implicit and static pattern rules");
-
- if (implicit && implicit_percent == 0)
- makefile_fatal (filename, lineno, "mixed implicit and normal rules");
-
- if (implicit)
- {
- if (targets == 0)
- {
- max_targets = 5;
- targets = (char **) xmalloc (5 * sizeof (char *));
- target_percents = (char **) xmalloc (5 * sizeof (char *));
- target_idx = 0;
- }
- else if (target_idx == max_targets - 1)
- {
- max_targets += 5;
- targets = (char **) xrealloc ((char *) targets,
- max_targets * sizeof (char *));
- target_percents
- = (char **) xrealloc ((char *) target_percents,
- max_targets * sizeof (char *));
- }
- targets[target_idx] = name;
- target_percents[target_idx] = implicit_percent;
- ++target_idx;
- continue;
- }
-
- /* If there are multiple filenames, copy the chain DEPS
- for all but the last one. It is not safe for the same deps
- to go in more than one place in the data base. */
- this = nextf != 0 ? copy_dep_chain (deps) : deps;
-
- if (pattern != 0)
- /* If this is an extended static rule:
- `targets: target%pattern: dep%pattern; cmds',
- translate each dependency pattern into a plain filename
- using the target pattern and this target's name. */
- if (!pattern_matches (pattern, pattern_percent, name))
- {
- /* Give a warning if the rule is meaningless. */
- makefile_error (filename, lineno,
- "target `%s' doesn't match the target pattern",
- name);
- this = 0;
- }
- else
- {
- /* We use patsubst_expand to do the work of translating
- the target pattern, the target's name and the dependencies'
- patterns into plain dependency names. */
- char *buffer = variable_expand ("");
-
- for (d = this; d != 0; d = d->next)
- {
- char *o;
- char *percent = find_percent (d->name);
- if (percent == 0)
- continue;
- o = patsubst_expand (buffer, name, pattern, d->name,
- pattern_percent, percent);
- free (d->name);
- d->name = savestring (buffer, o - buffer);
- }
- }
-
- if (!two_colon)
- {
- /* Single-colon. Combine these dependencies
- with others in file's existing record, if any. */
- f = enter_file (name);
-
- if (f->double_colon)
- makefile_fatal (filename, lineno,
- "target file `%s' has both : and :: entries",
- f->name);
-
- /* If CMDS == F->CMDS, this target was listed in this rule
- more than once. Just give a warning since this is harmless. */
- if (cmds != 0 && cmds == f->cmds)
- makefile_error
- (filename, lineno,
- "target `%s' given more than once in the same rule.",
- f->name);
-
- /* Check for two single-colon entries both with commands.
- Check is_target so that we don't lose on files such as .c.o
- whose commands were preinitialized. */
- else if (cmds != 0 && f->cmds != 0 && f->is_target)
- {
- makefile_error (cmds->filename, cmds->lineno,
- "warning: overriding commands for target `%s'",
- f->name);
- makefile_error (f->cmds->filename, f->cmds->lineno,
- "warning: ignoring old commands for target `%s'",
- f->name);
- }
-
- f->is_target = 1;
-
- /* Defining .DEFAULT with no deps or cmds clears it. */
- if (f == default_file && this == 0 && cmds == 0)
- f->cmds = 0;
- if (cmds != 0)
- f->cmds = cmds;
- /* Defining .SUFFIXES with no dependencies
- clears out the list of suffixes. */
- if (f == suffix_file && this == 0)
- {
- d = f->deps;
- while (d != 0)
- {
- struct dep *nextd = d->next;
- free (d->name);
- free (d);
- d = nextd;
- }
- f->deps = 0;
- }
- else if (f->deps != 0)
- {
- /* Add the file's old deps and the new ones in THIS together. */
-
- struct dep *firstdeps, *moredeps;
- if (cmds != 0)
- {
- /* This is the rule with commands, so put its deps first.
- The rationale behind this is that $< expands to the
- first dep in the chain, and commands use $< expecting
- to get the dep that rule specifies. */
- firstdeps = this;
- moredeps = f->deps;
- }
- else
- {
- /* Append the new deps to the old ones. */
- firstdeps = f->deps;
- moredeps = this;
- }
-
- if (firstdeps == 0)
- firstdeps = moredeps;
- else
- {
- d = firstdeps;
- while (d->next != 0)
- d = d->next;
- d->next = moredeps;
- }
-
- f->deps = firstdeps;
- }
- else
- f->deps = this;
-
- /* If this is a static pattern rule, set the file's stem to
- the part of its name that matched the `%' in the pattern,
- so you can use $* in the commands. */
- if (pattern != 0)
- {
- static char *percent = "%";
- char *buffer = variable_expand ("");
- char *o = patsubst_expand (buffer, name, pattern, percent,
- pattern_percent, percent);
- f->stem = savestring (buffer, o - buffer);
- }
- }
- else
- {
- /* Double-colon. Make a new record
- even if the file already has one. */
- f = lookup_file (name);
- /* Check for both : and :: rules. Check is_target so
- we don't lose on default suffix rules or makefiles. */
- if (f != 0 && f->is_target && !f->double_colon)
- makefile_fatal (filename, lineno,
- "target file `%s' has both : and :: entries",
- f->name);
- f = enter_file (name);
- /* If there was an existing entry and it was a
- double-colon entry, enter_file will have returned a
- new one, making it the prev pointer of the old one. */
- f->is_target = 1;
- f->double_colon = 1;
- f->deps = this;
- f->cmds = cmds;
- }
-
- /* Free name if not needed further. */
- if (f != 0 && name != f->name
- && (name < f->name || name > f->name + strlen (f->name)))
- {
- free (name);
- name = f->name;
- }
-
- /* See if this is first target seen whose name does
- not start with a `.', unless it contains a slash. */
- if (default_goal_file == 0 && set_default
- && (*name != '.' || index (name, '/') != 0))
- {
- int reject = 0;
-
- /* If this file is a suffix, don't
- let it be the default goal file. */
-
- for (d = suffix_file->deps; d != 0; d = d->next)
- {
- register struct dep *d2;
- if (*dep_name (d) != '.' && streq (name, dep_name (d)))
- {
- reject = 1;
- break;
- }
- for (d2 = suffix_file->deps; d2 != 0; d2 = d2->next)
- {
- register unsigned int len = strlen (dep_name (d2));
- if (strncmp (name, dep_name (d2), len))
- continue;
- if (streq (name + len, dep_name (d)))
- {
- reject = 1;
- break;
- }
- }
- if (reject)
- break;
- }
-
- if (!reject)
- default_goal_file = f;
- }
- }
-
- if (implicit)
- {
- targets[target_idx] = 0;
- target_percents[target_idx] = 0;
- create_pattern_rule (targets, target_percents, two_colon, deps, cmds, 1);
- free ((char *) target_percents);
- }
- }
-
- /* Search STRING for an unquoted ; that is not after an unquoted #. */
-
- static char *
- find_semicolon (string)
- char *string;
- {
- char *found, *p;
-
- found = index (string, ';');
- while (found != 0 && found[-1] == '\\')
- {
- register char *q = &found[-1];
- register int backslash = 0;
- while (*q-- == '\\')
- backslash = !backslash;
- if (backslash)
- found = index (found + 1, ';');
- else
- break;
- }
- if (found == 0)
- return 0;
-
- /* Look for a comment character (#) before the ; we found. */
- p = lindex (string, found, '#');
- while (p != 0 && p[-1] == '\\')
- {
- register char *q = &p[-1];
- register int backslash = 0;
- while (*q-- == '\\')
- backslash = !backslash;
- if (backslash)
- p = lindex (p + 1, found, '#');
- else
- break;
- }
- if (p == 0)
- return found;
- return 0;
- }
-
- /* Search PATTERN for an unquoted %. Backslashes quote % and backslash.
- Quoting backslashes are removed from PATTERN by compacting it into
- itself. Returns a pointer to the first unquoted % if there is one,
- or nil if there are none. */
-
- char *
- find_percent (pattern)
- char *pattern;
- {
- unsigned int pattern_len = strlen (pattern);
- register char *p = pattern;
-
- while ((p = index (p, '%')) != 0)
- if (p > pattern && p[-1] == '\\')
- {
- /* Search for more backslashes. */
- register int i = -2;
- while (&p[i] >= pattern && p[i] == '\\')
- --i;
- ++i;
- /* The number of backslashes is now -I.
- Copy P over itself to swallow half of them. */
- bcopy (&p[i / 2], &p[i], (pattern_len - (p - pattern)) - (i / 2) + 1);
- p += i / 2;
- if (i % 2 == 0)
- /* All the backslashes quoted each other; the % was unquoted. */
- return p;
-
- /* The % was quoted by a backslash. Look for another. */
- }
- else
- /* No backslash in sight. */
- return p;
-
- /* Never hit a %. */
- return 0;
- }
-
- /* Parse a string into a sequence of filenames represented as a
- chain of struct nameseq's in reverse order and return that chain.
-
- The string is passed as STRINGP, the address of a string pointer.
- The string pointer is updated to point at the first character
- not parsed, which either is a null char or equals STOPCHAR.
-
- SIZE is how big to construct chain elements.
- This is useful if we want them actually to be other structures
- that have room for additional info.
-
- If STRIP is nonzero, strip `./'s off the beginning. */
-
- struct nameseq *
- parse_file_seq (stringp, stopchar, size, strip)
- char **stringp;
- char stopchar;
- unsigned int size;
- int strip;
- {
- register struct nameseq *new = 0;
- register struct nameseq *new1;
- register char *p = *stringp;
- char *q;
- char *name;
- register int c;
-
- while (1)
- {
- /* Skip whitespace; see if any more names are left. */
- p = next_token (p);
- if (*p == '\0')
- break;
- if (*p == stopchar)
- break;
- /* Yes, find end of next name. */
- q = p;
- while (1)
- {
- c = *p++;
- if (c == '\0')
- break;
- else if (c == '\\' &&
- (*p == '\\' || isblank (*p) || *p == stopchar))
- ++p;
- else if (isblank (c) || c == stopchar)
- break;
- }
- p--;
-
- if (strip)
- /* Skip leading `./'s. */
- while (p - q > 2 && q[0] == '.' && q[1] == '/')
- {
- q += 2; /* Skip "./". */
- while (q < p && *q == '/')
- /* Skip following slashes: ".//foo" is "foo", not "/foo". */
- ++q;
- }
-
- /* Extract the filename just found, and skip it. */
-
- if (q == p)
- /* ".///" was stripped to "". */
- name = savestring ("./", 2);
- else
- name = savestring (q, p - q);
-
- /* Add it to the front of the chain. */
- new1 = (struct nameseq *) xmalloc (size);
- new1->name = name;
- new1->next = new;
- new = new1;
- }
-
- #ifndef NO_ARCHIVES
-
- /* Look for multi-word archive references.
- They are indicated by a elt ending with an unmatched `)' and
- an elt further down the chain (i.e., previous in the file list)
- with an unmatched `(' (e.g., "lib(mem"). */
-
- for (new1 = new; new1 != 0; new1 = new1->next)
- if (new1->name[0] != '(' /* Don't catch "(%)" and suchlike. */
- && new1->name[strlen (new1->name) - 1] == ')'
- && index (new1->name, '(') == 0)
- {
- /* NEW1 ends with a `)' but does not contain a `('.
- Look back for an elt with an opening `(' but no closing `)'. */
-
- struct nameseq *n = new1->next, *lastn = new1;
- char *paren;
- while (n != 0 && (paren = index (n->name, '(')) == 0)
- {
- lastn = n;
- n = n->next;
- }
- if (n != 0
- /* Ignore something starting with `(', as that cannot actually
- be an archive-member reference (and treating it as such
- results in an empty file name, which causes much lossage). */
- && n->name[0] != '(')
- {
- /* N is the first element in the archive group.
- Its name looks like "lib(mem" (with no closing `)'). */
-
- char *libname;
-
- /* Copy "lib(" into LIBNAME. */
- ++paren;
- libname = (char *) alloca (paren - n->name + 1);
- bcopy (n->name, libname, paren - n->name);
- libname[paren - n->name] = '\0';
-
- if (*paren == '\0')
- {
- /* N was just "lib(", part of something like "lib( a b)".
- Edit it out of the chain and free its storage. */
- lastn->next = n->next;
- free (n->name);
- free ((char *) n);
- /* LASTN->next is the new stopping elt for the loop below. */
- n = lastn->next;
- }
- else
- {
- /* Replace N's name with the full archive reference. */
- name = concat (libname, paren, ")");
- free (n->name);
- n->name = name;
- }
-
- if (new1->name[1] == '\0')
- {
- /* NEW1 is just ")", part of something like "lib(a b )".
- Omit it from the chain and free its storage. */
- lastn = new1;
- new1 = new1->next;
- if (new == lastn)
- new = new1;
- free (lastn->name);
- free ((char *) lastn);
- }
- else
- {
- /* Replace also NEW1->name, which already has closing `)'. */
- name = concat (libname, new1->name, "");
- free (new1->name);
- new1->name = name;
- new1 = new1->next;
- }
-
- /* Trace back from NEW1 (the end of the list) until N
- (the beginning of the list), rewriting each name
- with the full archive reference. */
-
- while (new1 != n)
- {
- name = concat (libname, new1->name, ")");
- free (new1->name);
- new1->name = name;
- new1 = new1->next;
- }
-
- if (new1 == 0)
- /* We might have slurped up the whole list,
- and continuing the loop would dereference NEW1. */
- break;
- }
- }
-
- #endif
-
- *stringp = p;
- return new;
- }
-
- /* Read a line of text from STREAM into LINEBUFFER.
- Combine continuation lines into one line.
- Return the number of actual lines read (> 1 if hacked continuation lines).
- */
-
- static unsigned int
- readline (linebuffer, stream, filename, lineno)
- struct linebuffer *linebuffer;
- FILE *stream;
- char *filename;
- unsigned int lineno;
- {
- char *buffer = linebuffer->buffer;
- register char *p = linebuffer->buffer;
- register char *end = p + linebuffer->size;
- register int len, lastlen = 0;
- register char *p2;
- register unsigned int nlines = 0;
- register int backslash;
-
- *p = '\0';
-
- while (fgets (p, end - p, stream) != 0)
- {
- len = strlen (p);
- if (len == 0)
- {
- /* This only happens when the first thing on the line is a '\0'.
- It is a pretty hopeless case, but (wonder of wonders) Athena
- lossage strikes again! (xmkmf puts NULs in its makefiles.)
- There is nothing really to be done; we synthesize a newline so
- the following line doesn't appear to be part of this line. */
- makefile_error (filename, lineno,
- "warning: NUL character seen; rest of line ignored");
- p[0] = '\n';
- len = 1;
- }
-
- p += len;
- if (p[-1] != '\n')
- {
- /* Probably ran out of buffer space. */
- register unsigned int p_off = p - buffer;
- linebuffer->size *= 2;
- buffer = (char *) xrealloc (buffer, linebuffer->size);
- p = buffer + p_off;
- end = buffer + linebuffer->size;
- linebuffer->buffer = buffer;
- *p = '\0';
- lastlen = len;
- continue;
- }
-
- ++nlines;
-
- if (len == 1 && p > buffer)
- /* P is pointing at a newline and it's the beginning of
- the buffer returned by the last fgets call. However,
- it is not necessarily the beginning of a line if P is
- pointing past the beginning of the holding buffer.
- If the buffer was just enlarged (right before the newline),
- we must account for that, so we pretend that the two lines
- were one line. */
- len += lastlen;
- lastlen = len;
- backslash = 0;
- for (p2 = p - 2; --len > 0; --p2)
- {
- if (*p2 == '\\')
- backslash = !backslash;
- else
- break;
- }
-
- if (!backslash)
- {
- p[-1] = '\0';
- break;
- }
-
- if (end - p <= 1)
- {
- /* Enlarge the buffer. */
- register unsigned int p_off = p - buffer;
- linebuffer->size *= 2;
- buffer = (char *) xrealloc (buffer, linebuffer->size);
- p = buffer + p_off;
- end = buffer + linebuffer->size;
- linebuffer->buffer = buffer;
- }
- }
-
- if (ferror (stream))
- pfatal_with_name (filename);
-
- return nlines;
- }
-
- /* Construct the list of include directories
- from the arguments and the default list. */
-
- void
- construct_include_path (arg_dirs)
- char **arg_dirs;
- {
- register unsigned int i;
- struct stat stbuf;
-
- /* Table to hold the dirs. */
-
- register unsigned int defsize = (sizeof (default_include_directories)
- / sizeof (default_include_directories[0]));
- register unsigned int max = 5;
- register char **dirs = (char **) xmalloc ((5 + defsize) * sizeof (char *));
- register unsigned int idx = 0;
-
- /* First consider any dirs specified with -I switches.
- Ignore dirs that don't exist. */
-
- if (arg_dirs != 0)
- while (*arg_dirs != 0)
- {
- char *dir = *arg_dirs++;
-
- if (dir[0] == '~')
- {
- char *expanded = tilde_expand (dir);
- if (expanded != 0)
- dir = expanded;
- }
-
- if (stat (dir, &stbuf) == 0 && S_ISDIR (stbuf.st_mode))
- {
- if (idx == max - 1)
- {
- max += 5;
- dirs = (char **)
- xrealloc ((char *) dirs, (max + defsize) * sizeof (char *));
- }
- dirs[idx++] = dir;
- }
- else if (dir != arg_dirs[-1])
- free (dir);
- }
-
- /* Now add at the end the standard default dirs. */
-
- for (i = 0; default_include_directories[i] != 0; ++i)
- if (stat (default_include_directories[i], &stbuf) == 0
- && S_ISDIR (stbuf.st_mode))
- dirs[idx++] = default_include_directories[i];
-
- dirs[idx] = 0;
-
- /* Now compute the maximum length of any name in it. */
-
- max_incl_len = 0;
- for (i = 0; i < idx; ++i)
- {
- unsigned int len = strlen (dirs[i]);
- /* If dir name is written with a trailing slash, discard it. */
- if (dirs[i][len - 1] == '/')
- /* We can't just clobber a null in because it may have come from
- a literal string and literal strings may not be writable. */
- dirs[i] = savestring (dirs[i], len - 1);
- if (len > max_incl_len)
- max_incl_len = len;
- }
-
- include_directories = dirs;
- }
-
- /* Expand ~ or ~USER at the beginning of NAME.
- Return a newly malloc'd string or 0. */
-
- char *
- tilde_expand (name)
- char *name;
- {
- if (name[1] == '/' || name[1] == '\0')
- {
- extern char *getenv ();
- char *home_dir;
- int is_variable;
-
- {
- /* Turn off --warn-undefined-variables while we expand HOME. */
- int save = warn_undefined_variables_flag;
- warn_undefined_variables_flag = 0;
-
- home_dir = allocated_variable_expand ("$(HOME)");
-
- warn_undefined_variables_flag = save;
- }
-
- is_variable = home_dir[0] != '\0';
- if (!is_variable)
- {
- free (home_dir);
- home_dir = getenv ("HOME");
- }
- if (home_dir == 0 || home_dir[0] == '\0')
- {
- extern char *getlogin ();
- char *name = getlogin ();
- home_dir = 0;
- if (name != 0)
- {
- struct passwd *p = getpwnam (name);
- if (p != 0)
- home_dir = p->pw_dir;
- }
- }
- if (home_dir != 0)
- {
- char *new = concat (home_dir, "", name + 1);
- if (is_variable)
- free (home_dir);
- return new;
- }
- }
- else
- {
- struct passwd *pwent;
- char *userend = index (name + 1, '/');
- if (userend != 0)
- *userend = '\0';
- pwent = getpwnam (name + 1);
- if (pwent != 0)
- {
- if (userend == 0)
- return savestring (pwent->pw_dir, strlen (pwent->pw_dir));
- else
- return concat (pwent->pw_dir, "/", userend + 1);
- }
- else if (userend != 0)
- *userend = '/';
- }
-
- return 0;
- }
-
- /* Given a chain of struct nameseq's describing a sequence of filenames,
- in reverse of the intended order, return a new chain describing the
- result of globbing the filenames. The new chain is in forward order.
- The links of the old chain are freed or used in the new chain.
- Likewise for the names in the old chain.
-
- SIZE is how big to construct chain elements.
- This is useful if we want them actually to be other structures
- that have room for additional info. */
-
- struct nameseq *
- multi_glob (chain, size)
- struct nameseq *chain;
- unsigned int size;
- {
- register struct nameseq *new = 0;
- register struct nameseq *old;
- struct nameseq *nexto;
-
- for (old = chain; old != 0; old = nexto)
- {
- glob_t gl;
- #ifndef NO_ARCHIVES
- char *memname;
- #endif
-
- nexto = old->next;
-
- if (old->name[0] == '~')
- {
- char *newname = tilde_expand (old->name);
- if (newname != 0)
- {
- free (old->name);
- old->name = newname;
- }
- }
-
- #ifndef NO_ARCHIVES
- if (ar_name (old->name))
- {
- /* OLD->name is an archive member reference.
- Replace it with the archive file name,
- and save the member name in MEMNAME.
- We will glob on the archive name and then
- reattach MEMNAME later. */
- char *arname;
- ar_parse_name (old->name, &arname, &memname);
- free (old->name);
- old->name = arname;
- }
- else
- memname = 0;
- #endif
-
- switch (glob (old->name, GLOB_NOCHECK, NULL, &gl))
- {
- case 0: /* Success. */
- {
- register int i = gl.gl_pathc;
- while (i-- > 0)
- {
- #ifndef NO_ARCHIVES
- if (memname != 0)
- {
- /* Try to glob on MEMNAME within the archive. */
- struct nameseq *found
- = ar_glob (gl.gl_pathv[i], memname, size);
- if (found == 0)
- {
- /* No matches. Use MEMNAME as-is. */
- struct nameseq *elt
- = (struct nameseq *) xmalloc (size);
- unsigned int alen = strlen (gl.gl_pathv[i]);
- unsigned int mlen = strlen (memname);
- elt->name = (char *) xmalloc (alen + 1 + mlen + 2);
- bcopy (gl.gl_pathv[i], elt->name, alen);
- elt->name[alen] = '(';
- bcopy (memname, &elt->name[alen + 1], mlen);
- elt->name[alen + 1 + mlen] = ')';
- elt->name[alen + 1 + mlen + 1] = '\0';
- elt->next = new;
- new = elt;
- }
- else
- {
- /* Find the end of the FOUND chain. */
- struct nameseq *f = found;
- while (f->next != 0)
- f = f->next;
-
- /* Attach the chain being built to the end of the FOUND
- chain, and make FOUND the new NEW chain. */
- f->next = new;
- new = found;
- }
-
- free (memname);
- }
- else
- #endif
- {
- struct nameseq *elt = (struct nameseq *) xmalloc (size);
- elt->name = savestring (gl.gl_pathv[i],
- strlen (gl.gl_pathv[i]));
- elt->next = new;
- new = elt;
- }
- }
- globfree (&gl);
- free (old->name);
- free (old);
- break;
- }
-
- case GLOB_NOSPACE:
- fatal ("virtual memory exhausted");
- break;
-
- default:
- old->next = new;
- new = old;
- break;
- }
- }
-
- return new;
- }
-