• Rasmus Villemoes's avatar
    kbuild: include core debug info when DEBUG_INFO_REDUCED · 50ab9a69
    Rasmus Villemoes authored
    With CONFIG_DEBUG_INFO_REDUCED, we do get quite a lot of debug info
    (around 22.7 MB for a defconfig+DEBUG_INFO_REDUCED). However, the
    "basenames must match" rule used by -femit-struct-debug-baseonly
    option means that we miss some core data structures, such as struct
    {device, file, inode, mm_struct, page} etc.
    
    We can easily get these included as well, while still getting the
    benefits of CONFIG_DEBUG_INFO_REDUCED (faster build times and smaller
    individual object files): All it takes is a dummy translation unit
    including a few strategic headers and compiled with a flag overriding
    -femit-struct-debug-baseonly.
    
    This increases the size of .debug_info by ~0.3%, but these 90 KB
    contain some rather useful info.
    Signed-off-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
    Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
    50ab9a69