I was trying to install Asterisk 1.2.12.1 on a Slackware 8.0.0 machine (yeah I know, kinda old) but was having trouble compiling. I got the following error:
asterisk.c: In function main': asterisk.c:2215:PR_SET_DUMPABLE’ undeclared (first use in this function)
asterisk.c:2215: (Each undeclared identifier is reported only once
asterisk.c:2215: for each function it appears in.)
make: *** [asterisk.o] Error 1
I changed the source to reflect PR_SET_PDEATHSIG instead of PR_SET_DUMPABLE and it compiled perfectly.
Question: Is there any reason why this could cause the software to be unstable or should I be OK?
Thank you 
=======Update
Perhaps I spoke too soon. When I tried to run asterisk -vvvc it got through a lot of it and then said:
[codec_lpc10.so] => (LPC10 2.4kbps (signed linear) Voice Coder)
== Parsing ‘/etc/asterisk/codecs.conf’: Found
– codec_lpc10: using generic PLC
Segmentation fault
root@srv01:/etc/asterisk# Ouch … error while writing audio data: : Broken pipe
Warning, flexibel rate not heavily tested!
Would this be something related to my question above or something different?