[IRCServices] Services 5.0.42 error in compiling

[us44ever .]

i get this error while compiling (upgrading from 5.0.41)
gcc  -O2 -fno-strict-aliasing -g -Wall -Wmissing-prototypes -fno-builtin-log 
-c version.c -o version.o
gcc -rdynamic actions.o channels.o commands.o compat.o conffile.o encrypt.o 
ignore.o init.o language.o log.o main.o memory.o messages.o misc.o modes.o 
modules.o process.o send.o servers.o signals.o sockets.o suspinfo.o 
timeout.o users.o  version.o   -o ircservices
log.o: In function `vlogprintf':
/usr/home/xxx/ircservices-5.0.42/log.c:103: undefined reference to `va_copy'
gmake: *** [ircservices] Error 1