crosstool-ng: config/libc/newlib.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 # newlib second-part options

     3 config LIBC_NEWLIB_IO_C99FMT

     4     bool

     5     prompt "Enable IOs on C99 formats"

     6     help

     7       Enable support for IOs on C99 formats.

     9 config LIBC_NEWLIB_IO_LL

    10     bool

    11     prompt "Enable IOs on long long"

    12     help

    13       Enable support for IOs on long long integers.

    15 config LIBC_NEWLIB_IO_FLOAT

    16     bool

    17     prompt "Enable IOs on floats and doubles"

    18     help

    19       Enable support for IOs on floating point

    20       values (float and double).

    22 config LIBC_NEWLIB_IO_LDBL

    23     bool

    24     prompt "Enable IOs on long doubles"

    25     depends on LIBC_NEWLIB_IO_FLOAT

    26     help

    27       Enable support for IOs on long doubles.

    29 config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS

    30     bool

    31     prompt "Disable the syscalls supplied with newlib"

    32     help

    33       Disable the syscalls that come with newlib. You

    34 	  will have to implement your own _sbrk, _read,

    35 	  _write... If you plan to port newlib to a new

    36 	  platform/board, say Yes.

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 2484	d1a8c2ae7946
child 2781	504b0759c149
permissions	-rw-r--r--