2 # Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
4 # Licensed under the OpenSSL license (the "License"). You may not use
5 # this file except in compliance with the License. You can obtain a copy
6 # in the file LICENSE in the source distribution or at
7 # https://www.openssl.org/source/license.html
15 use File::Spec::Functions qw(canonpath rel2abs);
16 use File::Compare qw(compare_text);
18 # When using stat() on Windows, we can get it to perform better by avoid some
19 # data. This doesn't affect the mtime field, so we're not losing anything...
20 ${^WIN32_SLOPPY_STAT} = 1;
22 my $debug = $ENV{ADD_DEPENDS_DEBUG};
23 my $buildfile = $config{build_file};
24 my $build_mtime = (stat($buildfile))[9];
26 my $depext = $target{dep_extension} || ".d";
30 # This grep has side effects. Not only does if check the existence
31 # of the dependency file given in $_, but it also checks if it's
32 # newer than the build file, and if it is, sets $rebuild.
34 $rebuild = 1 if @st && $st[9] > $build_mtime;
35 scalar @st > 0; # Determines the grep result
37 map { (my $x = $_) =~ s|\.o$|$depext|; $x; }
38 grep { $unified_info{sources}->{$_}->[0] =~ /\.cc?$/ }
39 keys %{$unified_info{sources}};
41 exit 0 unless $rebuild;
43 # Ok, primary checks are done, time to do some real work
45 my $abs_srcdir = rel2abs($config{sourcedir});
46 my $abs_blddir = rel2abs($config{builddir});
48 my $producer = shift @ARGV;
49 die "Producer not given\n" unless $producer;
52 'gcc' => undef, # gcc style dependency files needs no mods
55 # makedepend, in its infinite wisdom, wants to have the object file
56 # in the same directory as the source file. This doesn't work too
57 # well with out-of-source-tree builds, so we must resort to tricks
58 # to get things right. Fortunately, the .d files are always placed
59 # parallel with the object files, so all we need to do is construct
60 # the object file name from the dep file name.
61 (my $objfile = shift) =~ s|\.d$|.o|i;
65 return undef if $line =~ /^(#.*|\s*)$/;
67 # Remove the original object file
68 $line =~ s|^.*\.o: | |;
69 # Also, remove any dependency that starts with a /, because those
70 # are typically system headers
71 $line =~ s/\s+\/(\\.|\S)*//g;
72 # Finally, discard all empty lines
73 return undef if $line =~ /^\s*$/;
75 # All we got now is a dependency, just shave off surrounding spaces
78 return ($objfile, $line);
82 # current versions of DEC / Compaq / HP / VSI C strips away all
83 # directory information from the object file, so we must insert it
84 # back. To make life simpler, we simply replace it with the
85 # corresponding .D file that's had its extension changed. Since
86 # .D files are always written parallel to the object files, we
87 # thereby get the directory information for free.
88 (my $objfile = shift) =~ s|\.D$|.OBJ|i;
91 # Shave off the target.
93 # The pattern for target and dependencies will always take this
96 # target SPACE : SPACE deps
98 # This is so a volume delimiter (a : without any spaces around it)
99 # won't get mixed up with the target / deps delimiter. We use this
100 # to easily identify what needs to be removed.
101 m|\s:\s|; $line = $';
103 # We know that VMS has system header files in text libraries,
104 # extension .TLB. We also know that our header files aren't stored
105 # in text libraries. Finally, we know that VMS C produces exactly
106 # one dependency per line, so we simply discard any line ending with
108 return undef if /\.TLB\s*$/;
110 # All we got now is a dependency, just shave off surrounding spaces
113 return ($objfile, $line);
117 # For the moment, we only support Visual C on native Windows, or
118 # compatible compilers. With those, the flags /Zs /showIncludes
119 # give us the necessary output to be able to create dependencies
120 # that nmake (or any 'make' implementation) should be able to read,
121 # with a bit of help. The output we're interested in looks like
122 # this (it always starts the same)
124 # Note: including file: {whatever header file}
126 # Since there's no object file name at all in that information,
127 # we must construct it ourselves.
129 (my $objfile = shift) =~ s|\.d$|.obj|i;
132 # There are also other lines mixed in, for example compiler
133 # warnings, so we simply discard anything that doesn't start with
136 if (/^Note: including file: */) {
137 (my $tail = $') =~ s/\s*\R$//;
139 # VC gives us absolute paths for all include files, so to
140 # remove system header dependencies, we need to check that
141 # they don't match $abs_srcdir or $abs_blddir
142 $tail = canonpath($tail);
143 if ($tail =~ m|^\Q$abs_srcdir\E|i
144 || $tail =~ m|^\Q$abs_blddir\E|i) {
145 return ($objfile, "\"$tail\"");
152 my %continuations = (
154 'makedepend' => "\\",
159 die "Producer unrecognised: $producer\n"
160 unless exists $procedures{$producer} && exists $continuations{$producer};
162 my $procedure = $procedures{$producer};
163 my $continuation = $continuations{$producer};
165 my $buildfile_new = "$buildfile-$$";
168 if (defined $procedure) {
169 foreach my $depfile (@depfiles) {
170 open IDEP,$depfile or die "Trying to read $depfile: $!\n";
172 s|\R$||; # The better chomp
173 my ($target, $deps) = $procedure->($depfile, $_);
174 $collect{$target}->{$deps} = 1 if defined $target;
180 open IBF, $buildfile or die "Trying to read $buildfile: $!\n";
181 open OBF, '>', $buildfile_new or die "Trying to write $buildfile_new: $!\n";
183 last if /^# DO NOT DELETE THIS LINE/;
184 print OBF or die "$!\n";
188 print OBF "# DO NOT DELETE THIS LINE -- make depend depends on it.\n";
190 if (defined $procedure) {
191 foreach my $target (sort keys %collect) {
192 my $prefix = $target . ' :';
193 my @deps = sort keys %{$collect{$target}};
199 while (@deps && ($buf eq ''
200 || length($buf) + length($deps[0]) <= 77)) {
201 $buf .= ' ' . shift @deps;
203 $buf .= ' '.$continuation if @deps;
205 print OBF $buf,"\n" or die "Trying to print: $!\n"
209 foreach my $depfile (@depfiles) {
210 open IDEP,$depfile or die "Trying to read $depfile: $!\n";
212 print OBF or die "Trying to print: $!\n";
220 if (compare_text($buildfile_new, $buildfile) != 0) {
221 rename $buildfile_new, $buildfile
222 or die "Trying to rename $buildfile_new -> $buildfile: $!\n";
226 # On VMS, we want to remove all generations of this file, in case there
227 # are more than one, so we loop.
228 if (defined $buildfile_new) {
229 while (unlink $buildfile_new) {}