--- guile-1.8.7.or/libguile/guile-snarf-docs.in	2011-03-17 13:55:24.328184439 +0300
+++ guile-1.8.7/libguile/guile-snarf-docs.in	2011-03-17 13:55:56.753058827 +0300
@@ -23,4 +23,4 @@
 ## Let the user override the preprocessor autoconf found.
 test -n "${CPP+set}" || CPP="@CPP@"
 
-${CPP} -DSCM_MAGIC_SNARF_DOCS "$@"
+${CPP} -P -DSCM_MAGIC_SNARF_DOCS "$@"