1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
#! /usr/bin/env perl
# Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
use strict;
use warnings;
use lib '.';
use configdata;
use File::Spec::Functions qw(canonpath rel2abs);
use File::Compare qw(compare_text);
# When using stat() on Windows, we can get it to perform better by avoid some
# data. This doesn't affect the mtime field, so we're not losing anything...
${^WIN32_SLOPPY_STAT} = 1;
my $buildfile = $config{build_file};
my $build_mtime = (stat($buildfile))[9];
my $rebuild = 0;
my $depext = $target{dep_extension} || ".d";
my @depfiles =
sort
grep {
# This grep has side effects. Not only does if check the existence
# of the dependency file given in $_, but it also checks if it's
# newer than the build file, and if it is, sets $rebuild.
my @st = stat($_);
$rebuild = 1 if @st && $st[9] > $build_mtime;
scalar @st > 0; # Determines the grep result
}
map { (my $x = $_) =~ s|\.o$|$depext|; $x; }
grep { $unified_info{sources}->{$_}->[0] =~ /\.cc?$/ }
keys %{$unified_info{sources}};
exit 0 unless $rebuild;
# Ok, primary checks are done, time to do some real work
my $abs_srcdir = rel2abs($config{sourcedir});
my $abs_blddir = rel2abs($config{builddir});
my $producer = shift @ARGV;
die "Producer not given\n" unless $producer;
my %procedures = (
'gcc' => undef, # gcc style dependency files needs no mods
'makedepend' =>
sub {
# makedepend, in its infinite wisdom, wants to have the object file
# in the same directory as the source file. This doesn't work too
# well with out-of-source-tree builds, so we must resort to tricks
# to get things right. Fortunately, the .d files are always placed
# parallel with the object files, so all we need to do is construct
# the object file name from the dep file name.
(my $objfile = shift) =~ s|\.d$|.o|i;
my $line = shift;
# Discard comments
return undef if $line =~ /^(#.*|\s*)$/;
# Remove the original object file
$line =~ s|^.*\.o: | |;
# Also, remove any dependency that starts with a /, because those
# are typically system headers
$line =~ s/\s+\/(\\.|\S)*//g;
# Finally, discard all empty lines
return undef if $line =~ /^\s*$/;
# All we got now is a dependency, just shave off surrounding spaces
$line =~ s/^\s+//;
$line =~ s/\s+$//;
return ($objfile, $line);
},
'VMS C' =>
sub {
# current versions of DEC / Compaq / HP / VSI C strips away all
# directory information from the object file, so we must insert it
# back. To make life simpler, we simply replace it with the
# corresponding .D file that's had its extension changed. Since
# .D files are always written parallel to the object files, we
# thereby get the directory information for free.
(my $objfile = shift) =~ s|\.D$|.OBJ|i;
my $line = shift;
# Shave off the target.
#
# The pattern for target and dependencies will always take this
# form:
#
# target SPACE : SPACE deps
#
# This is so a volume delimiter (a : without any spaces around it)
# won't get mixed up with the target / deps delimiter. We use this
# to easily identify what needs to be removed.
m|\s:\s|; $line = $';
# We know that VMS has system header files in text libraries,
# extension .TLB. We also know that our header files aren't stored
# in text libraries. Finally, we know that VMS C produces exactly
# one dependency per line, so we simply discard any line ending with
# .TLB.
return undef if /\.TLB\s*$/;
# All we got now is a dependency, just shave off surrounding spaces
$line =~ s/^\s+//;
$line =~ s/\s+$//;
return ($objfile, $line);
},
'VC' =>
sub {
# For the moment, we only support Visual C on native Windows, or
# compatible compilers. With those, the flags /Zs /showIncludes
# give us the necessary output to be able to create dependencies
# that nmake (or any 'make' implementation) should be able to read,
# with a bit of help. The output we're interested in looks like
# this (it always starts the same)
#
# Note: including file: {whatever header file}
#
# Since there's no object file name at all in that information,
# we must construct it ourselves.
(my $objfile = shift) =~ s|\.d$|.obj|i;
my $line = shift;
# There are also other lines mixed in, for example compiler
# warnings, so we simply discard anything that doesn't start with
# the Note:
if (/^Note: including file: */) {
(my $tail = $') =~ s/\s*\R$//;
# VC gives us absolute paths for all include files, so to
# remove system header dependencies, we need to check that
# they don't match $abs_srcdir or $abs_blddir
$tail = canonpath($tail);
if ($tail =~ m|^\Q$abs_srcdir\E|i
|| $tail =~ m|^\Q$abs_blddir\E|i) {
return ($objfile, "\"$tail\"");
}
}
return undef;
},
);
my %continuations = (
'gcc' => undef,
'makedepend' => "\\",
'VMS C' => "-",
'VC' => "\\",
);
die "Producer unrecognised: $producer\n"
unless exists $procedures{$producer} && exists $continuations{$producer};
my $procedure = $procedures{$producer};
my $continuation = $continuations{$producer};
my $buildfile_new = "$buildfile-$$";
my %collect = ();
if (defined $procedure) {
foreach my $depfile (@depfiles) {
open IDEP,$depfile or die "Trying to read $depfile: $!\n";
while (<IDEP>) {
s|\R$||; # The better chomp
my ($target, $deps) = $procedure->($depfile, $_);
$collect{$target}->{$deps} = 1 if defined $target;
}
close IDEP;
}
}
open IBF, $buildfile or die "Trying to read $buildfile: $!\n";
open OBF, '>', $buildfile_new or die "Trying to write $buildfile_new: $!\n";
while (<IBF>) {
last if /^# DO NOT DELETE THIS LINE/;
print OBF or die "$!\n";
}
close IBF;
print OBF "# DO NOT DELETE THIS LINE -- make depend depends on it.\n";
if (defined $procedure) {
foreach my $target (sort keys %collect) {
my $prefix = $target . ' :';
my @deps = sort keys %{$collect{$target}};
while (@deps) {
my $buf = $prefix;
$prefix = '';
while (@deps && ($buf eq ''
|| length($buf) + length($deps[0]) <= 77)) {
$buf .= ' ' . shift @deps;
}
$buf .= ' '.$continuation if @deps;
print OBF $buf,"\n" or die "Trying to print: $!\n"
}
}
} else {
foreach my $depfile (@depfiles) {
open IDEP,$depfile or die "Trying to read $depfile: $!\n";
while (<IDEP>) {
print OBF or die "Trying to print: $!\n";
}
close IDEP;
}
}
close OBF;
if (compare_text($buildfile_new, $buildfile) != 0) {
rename $buildfile_new, $buildfile
or die "Trying to rename $buildfile_new -> $buildfile: $!\n";
}
END {
# On VMS, we want to remove all generations of this file, in case there
# are more than one, so we loop.
if (defined $buildfile_new) {
while (unlink $buildfile_new) {}
}
}
|
