• Roland McGrath's avatar
    Use --build-id ld option · 18991197
    Roland McGrath authored
    This change passes the --build-id when linking the kernel and when linking
    modules, if ld supports it.  This is a new GNU ld option that synthesizes an
    ELF note section inside the read-only data.  The note in this section contains
    unique identifying bits called the "build ID", which are generated so as to be
    different for any two linked ELF files that aren't identical.  The build ID
    can be recovered from stripped files, memory dumps, etc.  and used to look up
    the original program built, locate debuginfo or other details or history
    associated with it.  For normal program linking, the compiler passes
    --build-id to ld by default, but the option is needed when using ld directly
    as we do.
    Signed-off-by: default avatarRoland McGrath <roland@redhat.com>
    Cc: Andi Kleen <ak@suse.de>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Richard Henderson <rth@twiddle.net>
    Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Makefile 49.5 KB