Gdb7.6 does not have a recognized file.

Question

When I used gdb7.6 to parse the main file, gdb printed the following error:

"./core: main file handler does not recognize format

My environment:

• HP-UX hp12161 B.11.31 U ia64 0546304299.
• Compiler:. Gcc4.7.2
• gdb7.6 Configure =. / configure --enable-64-bit-bfd.

I noticed that on the ia64-hpux platform gdb does not call set_gdbarch_regset_from_core_section, the deprecated_add_core_fns interface.

How can I do to solve this problem?