[patch] skip tpf configure tests

[DJ Delorie]

        * crossconfig.m4: Since we know that all TPF builds are cross-
        builds and cannot run configuration-time link tests, do not 
        allow it; just go with known supported linker options.
        * configure: Regenerate (called as GLIBCXX_CROSSCONFIG).

Index: crossconfig.m4
===================================================================
--- crossconfig.m4      (revision 187002)
+++ crossconfig.m4      (working copy)
@@ -219,14 +219,14 @@ case "${host}" in
     AC_DEFINE(HAVE_ISNANF)
     AC_DEFINE(HAVE_MODFF)
     AC_DEFINE(HAVE_HYPOT)
     ;;
   *-tpf)
     SECTION_FLAGS='-ffunction-sections -fdata-sections'
+    SECTION_LDFLAGS='-Wl,--gc-sections $SECTION_LDFLAGS'
     AC_SUBST(SECTION_FLAGS)
-    GLIBCXX_CHECK_LINKER_FEATURES
     AC_DEFINE(HAVE_FINITE)
     AC_DEFINE(HAVE_FINITEF)
     AC_DEFINE(HAVE_FREXPF)
     AC_DEFINE(HAVE_HYPOTF)
     AC_DEFINE(HAVE_ISINF)
     AC_DEFINE(HAVE_ISINFF)