+PKG_CHECK_MODULES(GLIB, glib-2.0)
+PKG_CHECK_MODULES(GRITS, grits >= 0.6)
+
+# Define odd RSL install location
+AC_CHECK_LIB(rsl, RSL_wsr88d_to_radar, RSL_LIBS="-lrsl")
+AM_CONDITIONAL(HAVE_RSL, test "$RSL_LIBS" != "")
+AC_SUBST(RSL_LIBS)
+
+# Test for Windows vs. Unix
+case "${host}" in
+ *mingw32*) WIN32="yes" ;;
+ *) WIN32="no" ;;
+esac
+if test "$WIN32" = yes; then
+ ac_default_prefix="/"
+fi
+AM_CONDITIONAL([WIN32], test "$WIN32" = "yes")