Of course anyone who read README.win32 already knew this. :)
INST_TOP = $(INST_DRV)\perl
#
+# Uncomment if you want to build a 32-bit Perl using a 32-bit compiler
+# on a 64-bit version of Windows.
+#WIN64 = undef
+
+#
# Comment this out if you DON'T want your perl installation to be versioned.
# This means that the new installation will overwrite any files from the
# old installation at the same INST_TOP location. Leaving it enabled is
INST_TOP *= $(INST_DRV)\perl
#
+# Uncomment if you want to build a 32-bit Perl using a 32-bit compiler
+# on a 64-bit version of Windows.
+#WIN64 *= undef
+
+#
# Comment this out if you DON'T want your perl installation to be versioned.
# This means that the new installation will overwrite any files from the
# old installation at the same INST_TOP location. Leaving it enabled is