The above commands also exist in a version with an `x' suffix which
takes an object of the relevant type as argument.
+** Following longjmp call.
+
+Recent versions of glibc (2.4+?) encrypt stored values for setjmp/longjmp which
+prevents GDB from being able to follow a longjmp call using `next'. To
+disable this protection you need to set the environment variable
+LD_POINTER_GUARD to 0.
+
** Using GDB in Emacs
Debugging with GDB in Emacs offers some advantages over the command line (See