Fix compile error with old glibc verisons.

* config/ia64/linux.h (MD_FALLBACK_FRAME_STATE_FOR): Only define for
glibc 2.3 or better.

From-SVN: r77443

gcc/ChangeLog

+2004-02-06  James E Wilson  <wilson@specifixinc.com>
+
+	* config/ia64/linux.h (MD_FALLBACK_FRAME_STATE_FOR): Only define for
+	glibc 2.3 or better.
+
 2004-02-06  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* doc/tm.texi (TARGET_FLOAT_LIB_COMPARE_RETURNS_BOOL): Change

gcc/config/ia64/linux.h

@@ -58,6 +58,11 @@ do {						\
 /* Do code reading to identify a signal frame, and set the frame
    state data appropriately.  See unwind-dw2.c for the structs.  */
 
+/* This works only for glibc-2.3 and later, because sigcontext is different
+   in glibc-2.2.4.  */
+
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)
+
 #ifdef IN_LIBGCC2
 #include <signal.h>
 #include <sys/ucontext.h>
@@ -207,3 +212,4 @@ do {						\
     }
 
 #endif /* IN_LIBGCC2 */
+#endif /* glibc-2.3 or better */