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 $buildfile = $config{build_file};
23 my $build_mtime = (stat($buildfile))[9];
25 my $depext = $target{dep_extension} || ".d";
29 # This grep has side effects. Not only does if check the existence
30 # of the dependency file given in $_, but it also checks if it's
31 # newer than the build file, and if it is, sets $rebuild.
33 $rebuild = 1 if @st && $st[9] > $build_mtime;
34 scalar @st > 0; # Determines the grep result
36 map { (my $x = $_) =~ s|\.o$|$depext|; $x; }
37 grep { $unified_info{sources}->{$_}->[0] =~ /\.cc?$/ }
38 keys %{$unified_info{sources}};
40 exit 0 unless $rebuild;
42 # Ok, primary checks are done, time to do some real work
44 my $abs_srcdir = rel2abs($config{sourcedir});
45 my $abs_blddir = rel2abs($config{builddir});
47 my $producer = shift @ARGV;
48 die "Producer not given\n" unless $producer;
51 'gcc' => undef, # gcc style dependency files needs no mods
54 # makedepend, in its infinite wisdom, wants to have the object file
55 # in the same directory as the source file. This doesn't work too
56 # well with out-of-source-tree builds, so we must resort to tricks
57 # to get things right. Fortunately, the .d files are always placed
58 # parallel with the object files, so all we need to do is construct
59 # the object file name from the dep file name.
60 (my $objfile = shift) =~ s|\.d$|.o|i;
64 return undef if $line =~ /^(#.*|\s*)$/;
66 # Remove the original object file
67 $line =~ s|^.*\.o: | |;
68 # Also, remove any dependency that starts with a /, because those
69 # are typically system headers
70 $line =~ s/\s+\/(\\.|\S)*//g;
71 # Finally, discard all empty lines
72 return undef if $line =~ /^\s*$/;
74 # All we got now is a dependency, just shave off surrounding spaces
77 return ($objfile, $line);
81 # current versions of DEC / Compaq / HP / VSI C strips away all
82 # directory information from the object file, so we must insert it
83 # back. To make life simpler, we simply replace it with the
84 # corresponding .D file that's had its extension changed. Since
85 # .D files are always written parallel to the object files, we
86 # thereby get the directory information for free.
87 (my $objfile = shift) =~ s|\.D$|.OBJ|i;
90 # Shave off the target.
92 # The pattern for target and dependencies will always take this
95 # target SPACE : SPACE deps
97 # This is so a volume delimiter (a : without any spaces around it)
98 # won't get mixed up with the target / deps delimiter. We use this
99 # to easily identify what needs to be removed.
100 m|\s:\s|; $line = $';
102 # We know that VMS has system header files in text libraries,
103 # extension .TLB. We also know that our header files aren't stored
104 # in text libraries. Finally, we know that VMS C produces exactly
105 # one dependency per line, so we simply discard any line ending with
107 return undef if /\.TLB\s*$/;
109 # All we got now is a dependency, just shave off surrounding spaces
112 return ($objfile, $line);
116 # For the moment, we only support Visual C on native Windows, or
117 # compatible compilers. With those, the flags /Zs /showIncludes
118 # give us the necessary output to be able to create dependencies
119 # that nmake (or any 'make' implementation) should be able to read,
120 # with a bit of help. The output we're interested in looks like
121 # this (it always starts the same)
123 # Note: including file: {whatever header file}
125 # Since there's no object file name at all in that information,
126 # we must construct it ourselves.
128 (my $objfile = shift) =~ s|\.d$|.obj|i;
131 # There are also other lines mixed in, for example compiler
132 # warnings, so we simply discard anything that doesn't start with
135 if (/^Note: including file: */) {
136 (my $tail = $') =~ s/\s*\R$//;
138 # VC gives us absolute paths for all include files, so to
139 # remove system header dependencies, we need to check that
140 # they don't match $abs_srcdir or $abs_blddir
141 $tail = canonpath($tail);
142 if ($tail =~ m|^\Q$abs_srcdir\E|i
143 || $tail =~ m|^\Q$abs_blddir\E|i) {
144 return ($objfile, "\"$tail\"");
151 my %continuations = (
153 'makedepend' => "\\",
158 die "Producer unrecognised: $producer\n"
159 unless exists $procedures{$producer} && exists $continuations{$producer};
161 my $procedure = $procedures{$producer};
162 my $continuation = $continuations{$producer};
164 my $buildfile_new = "$buildfile-$$";
167 if (defined $procedure) {
168 foreach my $depfile (@depfiles) {
169 open IDEP,$depfile or die "Trying to read $depfile: $!\n";
171 s|\R$||; # The better chomp
172 my ($target, $deps) = $procedure->($depfile, $_);
173 $collect{$target}->{$deps} = 1 if defined $target;
179 open IBF, $buildfile or die "Trying to read $buildfile: $!\n";
180 open OBF, '>', $buildfile_new or die "Trying to write $buildfile_new: $!\n";
182 last if /^# DO NOT DELETE THIS LINE/;
183 print OBF or die "$!\n";
187 print OBF "# DO NOT DELETE THIS LINE -- make depend depends on it.\n";
189 if (defined $procedure) {
190 foreach my $target (sort keys %collect) {
191 my $prefix = $target . ' :';
192 my @deps = sort keys %{$collect{$target}};
198 while (@deps && ($buf eq ''
199 || length($buf) + length($deps[0]) <= 77)) {
200 $buf .= ' ' . shift @deps;
202 $buf .= ' '.$continuation if @deps;
204 print OBF $buf,"\n" or die "Trying to print: $!\n"
208 foreach my $depfile (@depfiles) {
209 open IDEP,$depfile or die "Trying to read $depfile: $!\n";
211 print OBF or die "Trying to print: $!\n";
219 if (compare_text($buildfile_new, $buildfile) != 0) {
220 rename $buildfile_new, $buildfile
221 or die "Trying to rename $buildfile_new -> $buildfile: $!\n";
225 # On VMS, we want to remove all generations of this file, in case there
226 # are more than one, so we loop.
227 if (defined $buildfile_new) {
228 while (unlink $buildfile_new) {}