+# - COMPAT=/DNO_SECURITY
+# Disables Pageant's use of <aclapi.h>, which is not available
+# with some development environments. This means that Pageant
+# won't care about the local user ID of processes accessing it; a
+# version of Pageant built with this option will therefore refuse
+# to run under NT-series OSes on security grounds (although it
+# will run fine on Win95-series OSes where there is no access
+# control anyway).
+#
+# Note that this definition is always enabled in the Cygwin
+# build, since at the time of writing this <aclapi.h> is known
+# not to be available in Cygwin.
+#
+# - COMPAT=/DNO_MULTIMON
+# Disables PuTTY's use of <multimon.h>, which is not available
+# with some development environments. This means that PuTTY's
+# full-screen mode (configurable to work on Alt-Enter) will
+# not behave usefully in a multi-monitor environment.
+#
+# - COMPAT=/DMSVC4
+# - RCFL=/DMSVC4
+# Makes a couple of minor changes so that PuTTY compiles using
+# MSVC 4. You will also need /DNO_SECURITY and /DNO_MULTIMON.
+#