Avoid non-portable signal(SIGCHLD, SIG_IGN)

[Joerg Wunsch]

As Gerald Pfeifer wrote:

>   assertion "libc_sigaction" failed: file "../../scheduler/pthread.c",
>   line 661

>   #3  0x5c16c404 in sigaction (signum=12, act=0xbfbfdce0, oldact=0xbfbfdcc8) at ../../scheduler/pthread.c:661

Signal #12 is SIGSYS (Illegal system call).  That should not be
related to the SIGCHLD manipulations.

>   #4  0x5c074f09 in getcwd () from /usr/lib/libc.so.4

Is getcwd() supposed to cause a SIGSYS at all?

OTOH, that failing dlsym() syscall could be related to all this...  I
don't know why that complicated dlsym() is used, but maybe since
sigaction() is now invoked directly before, the run-time loader has
already loaded it from libc.so before.  Maybe Alexandre can shed some
light on how that's supposed to work.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)