1: #!/usr/bin/env perl
2:
3: use File::Temp qw/ :mktemp /;
4: use Fcntl;
5: use warnings;
6:
7: die "usage: $0 Makefile ...\n" unless $#ARGV >= 0;
8:
9: my @incpaths;
10: my %dir_vars;
11: my %implicit;
12:
13: # Read in MANIFEST fail if present
14: my %manifest;
15: if (open(MANIFEST, "<MANIFEST")) {
16: while (<MANIFEST>) {
17: chomp;
18: next unless /([^\/]+\.[cly])$/;
19: $manifest{$1} = $_;
20: }
21: }
22:
23: foreach (@ARGV) {
24: mkdep($_);
25: }
26:
27: sub mkdep {
28: my $file = $_[0];
29: $file =~ s:^\./+::; # strip off leading ./
30:
31: my $makefile;
32: if (open(MF, "<$file")) {
33: local $/; # enable "slurp" mode
34: $makefile = <MF>;
35: } else {
36: warn "$0: $file: $!\n";
37: return undef;
38: }
39: close(MF);
40:
41: # New makefile, minus the autogenerated dependencies
42: my $separator = "# Autogenerated dependencies, do not modify";
43: my $new_makefile = $makefile;
44: $new_makefile =~ s/${separator}.*$//s;
45: $new_makefile .= "$separator\n";
46:
47: # Old makefile, join lines with continuation characters
48: $makefile =~ s/\\\n//mg;
49:
50: # Expand some configure bits
51: $makefile =~ s:\@COMMON_OBJS\@:aix.lo:;
52: $makefile =~ s:\@SUDO_OBJS\@:preload.o selinux.o sesh.o sudo_noexec.lo:;
53: $makefile =~ s:\@SUDOERS_OBJS\@:bsm_audit.lo linux_audit.lo ldap.lo plugin_error.lo:;
54: # XXX - fill in AUTH_OBJS from contents of the auth dir instead
55: $makefile =~ s:\@AUTH_OBJS\@:afs.lo aix_auth.lo bsdauth.lo dce.lo fwtk.lo getspwuid.lo kerb4.lo kerb5.lo pam.lo passwd.lo rfc1938.lo secureware.lo securid.lo securid5.lo sia.lo:;
56: $makefile =~ s:\@LTLIBOBJS\@:closefrom.lo dlopen.lo fnmatch.lo getcwd.lo getgrouplist.lo getline.lo getprogname.lo glob.lo isblank.lo memrchr.lo mksiglist.lo mktemp.lo nanosleep.lo setenv.lo siglist.lo snprintf.lo strlcat.lo strlcpy.lo strsignal.lo unsetenv.lo utimes.lo globtest.o fnm_test.o:;
57:
58: # Parse OBJS lines
59: my %objs;
60: while ($makefile =~ /^[A-Z0-9_]*OBJS\s*=\s*(.*)/mg) {
61: foreach (split/\s+/, $1) {
62: next if /^\$[\(\{].*[\)\}]$/; # skip included vars for now
63: $objs{$_} = 1;
64: }
65: }
66:
67: # Find include paths
68: @incpaths = ();
69: while ($makefile =~ /-I(\S+)/mg) {
70: push(@incpaths, $1) unless $1 eq ".";
71: }
72:
73: # Values of srcdir, top_srcdir, top_builddir, incdir
74: %dir_vars = ();
75: $file =~ m:^(.*)/+[^/]+:;
76: $dir_vars{'srcdir'} = $1 || '.';
77: $dir_vars{'devdir'} = $dir_vars{'srcdir'};
78: $dir_vars{'authdir'} = $dir_vars{'srcdir'} . "/auth";
79: $dir_vars{'top_srcdir'} = '.';
80: #$dir_vars{'top_builddir'} = '.';
81: $dir_vars{'incdir'} = 'include';
82:
83: # Find implicit rules for generate .o and .lo files
84: %implicit = ();
85: while ($makefile =~ /^\.c\.(l?o):\s*\n\t+(.*)$/mg) {
86: $implicit{$1} = $2;
87: }
88:
89: # Find existing .o and .lo dependencies
90: my %old_deps;
91: while ($makefile =~ /^(\w+\.l?o):\s*(\S+\.c)/mg) {
92: $old_deps{$1} = $2;
93: }
94:
95: # Sort files so we do .lo files first
96: foreach my $obj (sort keys %objs) {
97: next unless $obj =~ /(\S+)\.(l?o)$/;
98: if ($2 eq "o" && exists($objs{"$1.lo"})) {
99: # If we have both .lo and .o files, make the .o depend on the .lo
100: $new_makefile .= sprintf("%s: %s.lo\n", $obj, $1);
101: } else {
102: # Use old depenencies when mapping objects to their source.
103: # If no old depenency, use the MANIFEST file to find the source.
104: my $src = $1 . '.c';
105: my $ext = $2;
106: if (exists $old_deps{$obj}) {
107: $src = $old_deps{$obj};
108: } elsif (exists $manifest{$src}) {
109: $src = $manifest{$src};
110: foreach (sort { length($b) <=> length($a) } keys %dir_vars) {
111: last if $src =~ s:^\Q$dir_vars{$_}/\E:\$\($_\)/:;
112: }
113: } else {
114: warn "$file: unable to find source for $obj\n";
115: }
116: my $imp = $implicit{$ext};
117: $imp =~ s/\$</$src/g;
118:
119: my $deps = sprintf("%s: %s %s", $obj, $src,
120: join(' ', find_depends($src)));
121: if (length($deps) > 80) {
122: my $off = 0;
123: my $indent = length($obj) + 2;
124: while (length($deps) - $off > 80 - $indent) {
125: my $pos;
126: if ($off != 0) {
127: $new_makefile .= ' ' x $indent;
128: $pos = rindex($deps, ' ', $off + 80 - $indent - 2);
129: } else {
130: $pos = rindex($deps, ' ', $off + 78);
131: }
132: $new_makefile .= substr($deps, $off, $pos - $off) . " \\\n";
133: $off = $pos + 1;
134: }
135: $new_makefile .= ' ' x $indent;
136: $new_makefile .= substr($deps, $off) . "\n";
137: } else {
138: $new_makefile .= "$deps\n";
139: }
140: $new_makefile .= "\t$imp\n";
141: }
142: }
143:
144: rename($file, $file . ".old");
145: if (!open(MF, ">$file")) {
146: warn("cannot open $file: $!\n");
147: rename($file . ".old", $file);
148: } else {
149: print MF $new_makefile || warn("cannot write $file: $!\n");
150: close(MF);
151: }
152: }
153:
154: exit(0);
155:
156: sub find_depends {
157: my $src = $_[0];
158: my ($deps, $code, @headers);
159:
160: if ($src !~ /\//) {
161: # XXX - want build dir not src dir
162: $src = "$dir_vars{'srcdir'}/$src";
163: }
164:
165: # resolve $(srcdir) etc.
166: foreach (keys %dir_vars) {
167: $src =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
168: }
169:
170: # find open source file and find headers used by it
171: if (!open(FILE, "<$src")) {
172: warn "unable to open $src\n";
173: return "";
174: }
175: local $/; # enable "slurp" mode
176: $code = <FILE>;
177: close(FILE);
178:
179: # find all headers
180: while ($code =~ /^#\s*include\s+["<](\S+)[">]/mg) {
181: my ($hdr, $hdr_path) = find_header($1);
182: if (defined($hdr)) {
183: push(@headers, $hdr);
184: # Look for other includes in the .h file
185: push(@headers, find_depends($hdr_path));
186: }
187: }
188:
189: @headers;
190: }
191:
192: # find the path to a header file
193: # returns path or undef if not found
194: sub find_header {
195: my $hdr = $_[0];
196:
197: # Look for .h.in files in top_builddir and build dir
198: return ("\$(top_builddir\)/$hdr", "./${hdr}.in") if -r "./${hdr}.in";
199: return ("./$hdr", "$dir_vars{'srcdir'}/${hdr}.in") if -r "$dir_vars{'srcdir'}/${hdr}.in";
200:
201: foreach my $inc (@incpaths) {
202: my $hdr_path = "$inc/$hdr";
203: # resolve variables in include path
204: foreach (keys %dir_vars) {
205: $hdr_path =~ s/\$[\(\{]$_[\)\}]/$dir_vars{$_}/g;
206: }
207: return ("$inc/$hdr", $hdr_path) if -r $hdr_path;
208: }
209:
210: undef;
211: }
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