Turn off deprecated bison warnings under MSVC

adunstan · adunstan · commit 71c2fd0c04a5 · 2020-03-20T13:55:15.000-04:00
These are disabled by the configure code, so this is just fixing an
inconsistency in the MSVC code.

Backpatch to all live branches.
diff --git a/src/tools/msvc/pgbison.pl b/src/tools/msvc/pgbison.pl
@@ -45,5 +45,7 @@
 my $basetarg = basename($output);
 my $headerflag = ($make =~ /^$basetarg:\s+BISONFLAGS\b.*-d/m ? '-d' : '');
 
-system("bison $headerflag $input -o $output");
+my $nodep = $bisonver ge '3.0' ? "-Wno-deprecated" : "";
+
+system("bison $nodep $headerflag $input -o $output");
 exit $? >> 8;
