• Andi Kleen's avatar
    Kbuild: Add option to set -femit-struct-debug-baseonly · d6f4ceb7
    Andi Kleen authored
    Newer gcc has a -femit-struct-debug-baseonly option that dramatically
    reduces the size of object files with debug info. What it does
    is to only emit type information for structures when the structures
    are defined in the same file or in a header file.
    
    This means the type information for most headers are not included.
    This is not good when the type information is actually
    needed (e.g. with kgdb or systemtap)
    
    But often kernel hackers only care about line numbers and don't
    need all the type information anyways. In this case setting
    the option can be a big win:
    
    A build dir for a specific x86-64 configuration with gcc 4.5
    shrunk from 2.3G to 1.2G. The compilation was also nearly a minute
    faster.
    Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
    [mmarek: reformatted help text]
    Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
    d6f4ceb7
Makefile 50.1 KB