Support --with-extra-version equivalent functionality in MSVC build

Adds a configuration parameter, extraver, that is appended to the
version number when built.

Michael Paquier, reviewed by Muhammad Asif Naeem

src/tools/msvc/Solution.pm

@@ -164,9 +164,9 @@ sub GenerateFiles
 		  || confess "Could not write to pg_config.h\n";
 		while (<I>)
 		{
-			s{PG_VERSION "[^"]+"}{PG_VERSION "$self->{strver}"};
+			s{PG_VERSION "[^"]+"}{PG_VERSION "$self->{strver}$self->{options}->{extraver}"};
 			s{PG_VERSION_NUM \d+}{PG_VERSION_NUM $self->{numver}};
-s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY(z)\n#define PG_VERSION_STR "PostgreSQL $self->{strver}, compiled by Visual C++ build " __STRINGIFY2(_MSC_VER) ", $bits-bit"};
+			s{PG_VERSION_STR "[^"]+"}{__STRINGIFY(x) #x\n#define __STRINGIFY2(z) __STRINGIFY(z)\n#define PG_VERSION_STR "PostgreSQL $self->{strver}$self->{options}->{extraver}, compiled by Visual C++ build " __STRINGIFY2(_MSC_VER) ", $bits-bit"};
 			print O;
 		}
 		print O "#define PG_MAJORVERSION \"$self->{majorver}\"\n";
@@ -625,6 +625,7 @@ sub GetFakeConfigure
 	$cfg .= ' --enable-nls' if ($self->{options}->{nls});
 	$cfg .= ' --with-ldap'  if ($self->{options}->{ldap});
 	$cfg .= ' --without-zlib' unless ($self->{options}->{zlib});
+	$cfg .= ' --with-extra-version' if ($self->{options}->{extraver});
 	$cfg .= ' --with-openssl'       if ($self->{options}->{ssl});
 	$cfg .= ' --with-ossp-uuid'     if ($self->{options}->{uuid});
 	$cfg .= ' --with-libxml'        if ($self->{options}->{xml});

src/tools/msvc/config_default.pl

@@ -11,6 +11,7 @@ our $config = {
 	  # wal_blocksize => 8,     # --with-wal-blocksize, 8kB by default
 	  # wal_segsize => 16,      # --with-wal-segsize, 16MB by default
 	ldap     => 1,       # --with-ldap
+	extraver => undef,   # --with-extra-version=<string>
 	nls      => undef,   # --enable-nls=<path>
 	tcl      => undef,   # --with-tls=<path>
 	perl     => undef,   # --with-perl