diff options
Diffstat (limited to 'deps/openssl/openssl/util/add-depends.pl')
| -rw-r--r-- | deps/openssl/openssl/util/add-depends.pl | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/deps/openssl/openssl/util/add-depends.pl b/deps/openssl/openssl/util/add-depends.pl new file mode 100644 index 0000000000..55d56b7613 --- /dev/null +++ b/deps/openssl/openssl/util/add-depends.pl @@ -0,0 +1,288 @@ +#! /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(:DEFAULT rel2abs); +use File::Compare qw(compare_text); +use feature 'state'; + +# 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 $debug = $ENV{ADD_DEPENDS_DEBUG}; +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}} ), + ( grep { $unified_info{shared_sources}->{$_}->[0] =~ /\.cc?$/ } + keys %{$unified_info{shared_sources}} ) ); + +exit 0 unless $rebuild; + +# Ok, primary checks are done, time to do some real work + +my $producer = shift @ARGV; +die "Producer not given\n" unless $producer; + +my $srcdir = $config{sourcedir}; +my $blddir = $config{builddir}; +my $abs_srcdir = rel2abs($srcdir); +my $abs_blddir = rel2abs($blddir); + +# Convenient cache of absolute to relative map. We start with filling it +# with mappings for the known generated header files. They are relative to +# the current working directory, so that's an easy task. +# NOTE: there's more than C header files that are generated. They will also +# generate entries in this map. We could of course deal with C header files +# only, but in case we decide to handle more than just C files in the future, +# we already have the mechanism in place here. +# NOTE2: we lower case the index to make it searchable without regard for +# character case. That could seem dangerous, but as long as we don't have +# files we depend on in the same directory that only differ by character case, +# we're fine. +my %depconv_cache = + map { catfile($abs_blddir, $_) => $_ } + keys %{$unified_info{generate}}; + +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 { + state $abs_srcdir_shaved = undef; + state $srcdir_shaved = undef; + + unless (defined $abs_srcdir_shaved) { + ($abs_srcdir_shaved = $abs_srcdir) =~ s|[>\]]$||; + ($srcdir_shaved = $srcdir) =~ s|[>\]]$||; + } + + # 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+//; + $line =~ s/\s+$//; + + # VMS C gives us absolute paths, always. Let's see if we can + # make them relative instead. + $line = canonpath($line); + + unless (defined $depconv_cache{$line}) { + my $dep = $line; + # Since we have already pre-populated the cache with + # mappings for generated headers, we only need to deal + # with the source tree. + if ($dep =~ s|^\Q$abs_srcdir_shaved\E([\.>\]])?|$srcdir_shaved$1|i) { + $depconv_cache{$line} = $dep; + } + } + return ($objfile, $depconv_cache{$line}) + if defined $depconv_cache{$line}; + print STDERR "DEBUG[VMS C]: ignoring $objfile <- $line\n" + if $debug; + + return undef; + }, + '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); + + unless (defined $depconv_cache{$tail}) { + my $dep = $tail; + # Since we have already pre-populated the cache with + # mappings for generated headers, we only need to deal + # with the source tree. + if ($dep =~ s|^\Q$abs_srcdir\E\\|\$(SRCDIR)\\|i) { + $depconv_cache{$tail} = $dep; + } + } + return ($objfile, '"'.$depconv_cache{$tail}.'"') + if defined $depconv_cache{$tail}; + print STDERR "DEBUG[VC]: ignoring $objfile <- $tail\n" + if $debug; + } + + 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) {} + } +} |