File guile-gcc.patch of Package guile

Index: guile-1.8.7/libguile/guile-snarf-docs.in
===================================================================
--- guile-1.8.7.orig/libguile/guile-snarf-docs.in
+++ guile-1.8.7/libguile/guile-snarf-docs.in
@@ -23,4 +23,4 @@ bindir=`dirname $0`
 ## Let the user override the preprocessor autoconf found.
 test -n "${CPP+set}" || CPP="@CPP@"
 
-${CPP} -DSCM_MAGIC_SNARF_DOCS "$@"
+${CPP} -P -DSCM_MAGIC_SNARF_DOCS "$@"