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Extend gendef.pl in preparation for meson

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The main issue with using gendef.pl as-is for meson is that with meson the
filenames are a bit longer, exceeding the max commandline length when calling
dumpbin with all objects. As it's easier to pass in a library anyway, do so.

The .def file location, input and temporary file location need to be tunable
as well.

This also fixes a bug in gendef.pl: The logic when to regenerate was broken
and never avoid regenerating.

Author: Andres Freund <andres@anarazel.de>
Reviewed-By: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Discussion: https://postgr.es/m/20220809071055.rgikv3qn74ypnnbb@awork3.anarazel.de
Discussion: https://postgr.es/m/7dae5979-c6c0-cec5-7a36-76a85aa8053d@enterprisedb.com
This commit is contained in:
Andres Freund 2022-09-19 15:34:50 -07:00
parent 1091b48cd7
commit 70df2df1cc
2 changed files with 49 additions and 22 deletions
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4
src/tools/msvc/MSBuildProject.pm
View File

@ -312,6 +312,8 @@ sub WriteItemDefinitionGroup
my $targetmachine =
$self->{platform} eq 'Win32' ? 'MachineX86' : 'MachineX64';
my $arch =
$self->{platform} eq 'Win32' ? 'x86' : 'x86_64';
my $includes = join ';', @{ $self->{includes} }, "";
@ -380,7 +382,7 @@ EOF
print $f <<EOF;
<PreLinkEvent>
<Message>Generate DEF file</Message>
<Command>perl src\\tools\\msvc\\gendef.pl $cfgname\\$self->{name} $self->{platform}</Command>
<Command>perl src\\tools\\msvc\\gendef.pl --arch $arch --deffile $cfgname\\$self->{name}\\$self->{name}.def $cfgname\\$self->{name}</Command>
</PreLinkEvent>
EOF
}

67
src/tools/msvc/gendef.pl
View File

@ -3,7 +3,8 @@
use strict;
use warnings;
use List::Util qw(max);
use List::Util qw(min);
use Getopt::Long;
my @def;
@ -112,7 +113,7 @@ sub extract_syms
sub writedef
{
my ($deffile, $platform, $def) = @_;
my ($deffile, $arch, $def) = @_;
open(my $fh, '>', $deffile) || die "Could not write to $deffile\n";
print $fh "EXPORTS\n";
foreach my $f (sort keys %{$def})
@ -121,7 +122,7 @@ sub writedef
# Strip the leading underscore for win32, but not x64
$f =~ s/^_//
unless ($platform eq "x64");
unless ($arch eq "x86_64");
# Emit just the name if it's a function symbol, or emit the name
# decorated with the DATA option for variables.
@ -141,40 +142,64 @@ sub writedef
sub usage
{
die( "Usage: gendef.pl <modulepath> <platform>\n"
. " modulepath: path to dir with obj files, no trailing slash"
. " platform: Win32 | x64");
die("Usage: gendef.pl --arch <arch> --deffile <deffile> --tempdir <tempdir> files-or-directories\n"
. " arch: x86 | x86_64\n"
. " deffile: path of the generated file\n"
. " tempdir: directory for temporary files\n"
. " files or directories: object files or directory containing object files\n"
);
}
usage()
unless scalar(@ARGV) == 2
&& ( ($ARGV[0] =~ /\\([^\\]+$)/)
&& ($ARGV[1] eq 'Win32' || $ARGV[1] eq 'x64'));
my $defname = uc $1;
my $deffile = "$ARGV[0]/$defname.def";
my $platform = $ARGV[1];
my $arch;
my $deffile;
my $tempdir = '.';
GetOptions(
'arch:s' => \$arch,
'deffile:s' => \$deffile,
'tempdir:s' => \$tempdir,) or usage();
usage("arch: $arch")
unless ($arch eq 'x86' || $arch eq 'x86_64');
my @files;
foreach my $in (@ARGV)
{
if (-d $in)
{
push @files, glob "$in/*.obj";
}
else
{
push @files, $in;
}
}
# if the def file exists and is newer than all input object files, skip
# its creation
if (-f $deffile
&& (-M $deffile > max(map { -M } <$ARGV[0]/*.obj>)))
&& (-M $deffile < min(map { -M } @files)))
{
print "Not re-generating $defname.DEF, file already exists.\n";
print "Not re-generating $deffile, file already exists.\n";
exit(0);
}
print "Generating $defname.DEF from directory $ARGV[0], platform $platform\n";
print "Generating $deffile in tempdir $tempdir\n";
my %def = ();
my $symfile = "$ARGV[0]/all.sym";
my $tmpfile = "$ARGV[0]/tmp.sym";
system("dumpbin /symbols /out:$tmpfile $ARGV[0]/*.obj >NUL")
&& die "Could not call dumpbin";
my $symfile = "$tempdir/all.sym";
my $tmpfile = "$tempdir/tmp.sym";
mkdir($tempdir) unless -d $tempdir;
my $cmd = "dumpbin /nologo /symbols /out:$tmpfile " . join(' ', @files);
system($cmd) && die "Could not call dumpbin";
rename($tmpfile, $symfile);
extract_syms($symfile, \%def);
print "\n";
writedef($deffile, $platform, \%def);
writedef($deffile, $arch, \%def);
print "Generated " . scalar(keys(%def)) . " symbols\n";