upstart not compiling on some systems

[paul]

I am trying to compile upstart on my computers. On one it compiles OK
but on the other it fails as follows:

i686-pc-linux-gnu-gcc -std=gnu99 -DHAVE_CONFIG_H
-DLOCALEDIR="\"/usr/share/locale\"" -DCFG_DIR="\"/etc/event.d\""
-DTELINIT="\"/usr/sbin/telinit\"" -I.. -I.. -I. -I../intl    -O3
-march=pentium3 -pipe -c cfgfile.c
cfgfile.c: In function `cfg_job_stanza':
cfgfile.c:880: error: `RLIMIT_NICE' undeclared (first use in this function)
cfgfile.c:880: error: (Each undeclared identifier is reported only once
cfgfile.c:880: error: for each function it appears in.)
cfgfile.c:888: error: `RLIMIT_RTPRIO' undeclared (first use in this
function)
make[2]: *** [cfgfile.o] Error 1

It fails both 0.2.7 and 0.3.0

The compiling system has kernel 2.6.15, gcc4.1.1 and glibc2.4. The
failing system has kernel 2.6.17, gcc3.4.6 and glibc2.3.6. Both are
gentoo systems. Is there a minimum requirement for the (kernel,)
compiler and or glibc?

thanks,
Paul