Right, you'll need to build with debug symbols, which requires stabs symbols currently (we have DWARF support coming soon). If you're building with a mozconfig, you can pass that in CFLAGS/CXXFLAGS in your mozconfig, otherwise if you're just running configure manually, you can do:
CFLAGS=-gstabs+ CXXFLAGS=-gstabs+ ../configure ...
Right, you'll need to build with debug symbols, which requires stabs symbols currently (we have DWARF support coming soon). If you're building with a mozconfig, you can pass that in CFLAGS/CXXFLAGS in your mozconfig, otherwise if you're just running configure manually, you can do:
CFLAGS=-gstabs+ CXXFLAGS=-gstabs+ ../configure ...