1# -*-perl-*- hey - emacs - this is a perl file
2
3# src/tools/msvc/pgbison.pl
4
5use strict;
6use File::Basename;
7
8# assume we are in the postgres source root
9
10do './src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl';
11
12my ($bisonver) = `bison -V`;    # grab first line
13$bisonver = (split(/\s+/, $bisonver))[3];    # grab version number
14
15unless ($bisonver eq '1.875' || $bisonver ge '2.2')
16{
17	print "WARNING! Bison install not found, or unsupported Bison version.\n";
18	print "echo Attempting to build without.\n";
19	exit 0;
20}
21
22my $input = shift;
23if ($input !~ /\.y$/)
24{
25	print "Input must be a .y file\n";
26	exit 1;
27}
28elsif (!-e $input)
29{
30	print "Input file $input not found\n";
31	exit 1;
32}
33
34(my $output = $input) =~ s/\.y$/.c/;
35
36# plpgsql just has to be different
37$output =~ s/gram\.c$/pl_gram.c/ if $input =~ /src.pl.plpgsql.src.gram\.y$/;
38
39my $makefile = dirname($input) . "/Makefile";
40my ($mf, $make);
41open($mf, $makefile);
42local $/ = undef;
43$make = <$mf>;
44close($mf);
45my $basetarg = basename($output);
46my $headerflag = ($make =~ /^$basetarg:\s+BISONFLAGS\b.*-d/m ? '-d' : '');
47
48my $nodep = $bisonver ge '3.0' ? "-Wno-deprecated" : "";
49
50system("bison $nodep $headerflag $input -o $output");
51exit $? >> 8;
52