linux-yocto/3.8: Makefile: add -grecord-gcc-switches if using -mfentry

    Commit a2546fae [ftrace: Add -mfentry to Makefile on function tracer]
    adds support for using -mfentry when possible, whenever the ftrace
    CONFIG_FUNCTION_TRACER option is enabled.

    This unfortunately causes bogus dwarf debuginfo to be generated:

      gcc Bug 54793 - the location of a formal_parameter is not started from a
                      function entry with -mfentry

      http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54793

    This can be fixed by applying the gcc patch above, which will be
    present in gcc-4.8, but in the meantime, the problem is currently
    being worked around in different ways by various tools.  One of those
    tools that we support in Yocto, Systemtap, requires the DW_AT_producer
    string contain -mfentry, which means that it's assuming
    record-gcc-switches is also used:

      SystemTap Bug 15123 - workaround for bad debuginfo for -mfentry
      http://sourceware.org/bugzilla/show_bug.cgi?id=15123

    The lack of -grecord-gcc-switches and therefore a missing -mfentry
    string in Yocto leads to the following Yocto bug:

      Bug 4099 - Crosstap script check fails
      https://bugzilla.yoctoproject.org/show_bug.cgi?id=4099

    Which is what this patch intends to fix.

    It only affects architectures that HAVE_FENTRY when
    CONFIG_FUNCTION_TRACER is turned on and in any case is just adding to
    the debuginfo, so there doesn't seem to be much risk to adding it.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/recipes-kernel/linux/linux-yocto-tiny_3.8.bb b/meta/recipes-kernel/linux/linux-yocto-tiny_3.8.bb
index 1fe4139e8f..6ef143ebb2 100644
--- a/meta/recipes-kernel/linux/linux-yocto-tiny_3.8.bb
+++ b/meta/recipes-kernel/linux/linux-yocto-tiny_3.8.bb
@@ -12,7 +12,7 @@ LINUX_VERSION ?= "3.8.4"
 
 KMETA = "meta"
 
-SRCREV_machine ?= "11998bd1f44b21cd0b8c0ca11cbd36865f14bfdc"
+SRCREV_machine ?= "d9a45e3325030f7bd6f37947a7a0b12da7f602c3"
 SRCREV_meta ?= "27b63fdbd25ad1a37bacc05f49a205c150d21779"
 
 PR = "${INC_PR}.1"