Hi,

This goes together with the first binutils patch described here:
http://sourceware.org/ml/binutils/2012-04/msg00423.html

That together with the following patch will make gdb handle
DW_AT_high_pc constant form following DWARF 4+.

Tested on x86_64-unknown-linux-gnu against both a patched and unpatched
gcc from git trunk (to output the new form for DW_AT_high_pc).

Cheers,

Mark