Properly check glibc.

2010-09-06  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/linux-unwind.h (x86_fallback_frame_state): Properly
	check glibc.

From-SVN: r163933

gcc/ChangeLog

+2010-09-06  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/linux-unwind.h (x86_fallback_frame_state): Properly
+	check glibc.
+
 2010-09-06  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/22152

gcc/config/i386/linux-unwind.h

@@ -106,7 +106,7 @@ x86_64_fallback_frame_state (struct _Unwind_Context *context,
    signal-turned-exceptions for them.  There's also no configure-run for
    the target, so we can't check on (e.g.) HAVE_SYS_UCONTEXT_H.  Using the
    target libc version macro should be enough.  */
-#if !(__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
+#if defined __GLIBC__ && !(__GLIBC__ == 2 && __GLIBC_MINOR__ == 0)
 
 #include <signal.h>
 #include <sys/ucontext.h>