crosstool-ng: config/kernel/linux.in.2@c0bf2319af08

scripts: fix dumping execution backtrace

Dumping the backtrace has been broken since changeset #652e56d6d35a:
scripts: execute each steps in a subshell

We can spawn sub-sub-shells in some cases.

The way the fault handler works is to dump the backtrace, but to avoid
printing it once for every sub-shell (which could get quite confusing),
it simply exits when it detects that it is being run in a sub-shell,
leaving to the top-level shell the work to dump the backtrace.

Because each step is executed in its own sub-shell, the variable arrays
that contain the step name, the source file and line number, are lost
when exiting the per-step sub-shell.

Hence, the backtrace is currently limited to printing only the top-level
main procedure of the shell.

Fix this thus:
- when dumping the bckatraces for the steps & the functions, remember
it was dumped, and only dump it if it was not already dumped
- at the top-level shell, print the hints

Also, rename the top-level step label.

Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 4193d6e6a17430a177fa88c287879c2c35e319f3)

     1 # Linux kernel options

     3 if ! KERNEL_LINUX_USE_CUSTOM_HEADERS

     5 choice

     6     bool

     7     prompt "Kernel verbosity:"

     8     default KERNEL_LINUX_VERBOSITY_0

    10 config KERNEL_LINUX_VERBOSITY_0

    11     bool

    12     prompt "Simplified"

    13     help

    14       Print simplified command lines.

    16 config KERNEL_LINUX_VERBOSITY_1

    17     bool

    18     prompt "Full commands"

    19     help

    20       Print full command lines.

    22 config KERNEL_LINUX_VERBOSITY_2

    23     bool

    24     prompt "Exec reasons"

    25     help

    26       Print the reasons why a make target is rebuild.

    28 endchoice

    30 config KERNEL_LINUX_VERBOSE_LEVEL

    31     int

    32     default 0 if KERNEL_LINUX_VERBOSITY_0

    33     default 1 if KERNEL_LINUX_VERBOSITY_1

    34     default 2 if KERNEL_LINUX_VERBOSITY_2

    36 config KERNEL_LINUX_INSTALL_CHECK

    37     bool

    38     prompt "Check installed headers"

    39     default y

    40     help

    41       If you are in doubt that installed headers are buggy, say 'Y'

    42       here to have an extra check passed onto the headers.

    44 endif # ! KERNEL_LINUX_USE_CUSTOM_HEADERS

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Tue Dec 13 23:32:39 2011 +0100 (2011-12-13)
branch	1.13
changeset 2847	c0bf2319af08
parent 2446	d902cd77419f
permissions	-rw-r--r--