Bodgy support around including X11/Xos_r.h

Undefine index and rindex first to prevent clashes with tt funcs.

Should be fixed by namespacing local funcs

cde/lib/tt/lib/util/tt_host_equiv.C

@@ -36,8 +36,15 @@
 
 #define X_INCLUDE_NETDB_H
 #define XOS_USE_XT_LOCKING
+#if defined(linux)
+#define index
+#define rindex
+#endif
 #include <X11/Xos_r.h>
-
+#if defined(linux)
+#undef index
+#undef rindex
+#endif
 static int _cache_it(_Tt_hostname_cache_ptr, _Tt_string &);
 
 // This null constructor is required by the _table_of macro:

cde/lib/tt/lib/util/tt_path.C

@@ -49,7 +49,15 @@
 /* Included after "util/tt_string.h" to avoid index/strchr conflicts. */
 #define X_INCLUDE_DIRENT_H
 #define XOS_USE_NO_LOCKING
+#if defined(linux)
+#define index
+#define rindex
+#endif
 #include <X11/Xos_r.h>
+#if defined(linux)
+#undef index
+#undef rindex
+#endif
 
 #if defined(OPT_BUG_USL) || defined(OPT_BUG_UXP)
 #define S_ISLNK(mode)   ((mode & 0xF000) == S_IFLNK)

cde/lib/tt/lib/util/tt_string_map.C

@@ -45,7 +45,15 @@
 /* Included after "util/tt_string.h" to avoid index/strchr conflicts. */
 #define X_INCLUDE_STRING_H
 #define XOS_USE_NO_LOCKING
+#if defined(linux)
+#define index
+#define rindex
+#endif
 #include <X11/Xos_r.h>
+#if defined(linux)
+#undef index
+#undef rindex
+#endif
 
 _Tt_string_map::
 _Tt_string_map (_Tt_object_table_keyfn key_function)